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Ore sorting machine
  • How phosphate ore is enriched by beneficiation How phosphate ore is enriched by beneficiation Nov 03, 2022
    Phosphate ore is a general term for phosphate minerals that can be used as an important chemical material, mainly used in medicine, food, matches, dyes, sugar, ceramics, national defense and other industrial sectors, as well as an important mineral raw material for the extraction of phosphate fertilizer.   China's phosphate ore reserves are currently ranked third after Morocco and the United States, domestic phosphate ore distribution is concentrated in Yunnan, Guizhou, Sichuan, Hubei and Hunan 5 provinces, the total reserves account for about 74.5% of the country, phosphate ore by the formation of two main types of apatite and phosphorite, where apatite is mainly in igneous or metamorphic rocks in the form of crystalline apatite, phosphorite is gray-black, cryptocrystalline microcrystalline structure, breccia structure. Now known to contain phosphorus minerals in more than 120 kinds, now the industrial use of phosphate ore is mainly apatite, in fact, for sulfur phosphorus aluminum strontium stone, blue iron stone, etc., of which more than 95% of the phosphorus element mainly several species in the apatite.  There are more associated minerals in natural phosphate ore, mainly miscellaneous rocks and veins, specifically two types of silica minerals and carbonates. Silica minerals are mainly quartz, quartz square, flint, opal, clay ore or other silicate minerals such as feldspar, mica, etc. Carbonates are mainly limestone and dolomite.      The goal of phosphate ore enrichment is to maximize the separation and removal of impurity minerals and improve the grade and quality of phosphate ore. The enrichment process includes crushing and separation (crushing and crushing), washing and classification (washing and classification), separation and purification (flotation, magnetic separation, photoelectric separation, calcination, heavy media separation), the three main steps. The process and operation of phosphate ore preconcentration and discarding are as follows. 1. Crushing and separation      Phosphate ore enrichment requires crushing and smashing to achieve monomeric dissociation of phosphate minerals and veinlets, mainly because the phosphate minerals and miscellaneous stones are in cementation together, the original ore can only be broken and ground to achieve monomeric dissociation. This step is the basic step of phosphate ore enrichment. 2. Water washing classification     Phosphate ore due to the mining process in the wet ore adhering to the mud, only after water washing to remove the mud, while water washing can also remove soluble water substances and so on. Because the phosphate ore after crushing, water washing particle size is different, you need to go through the classification equipment to sort out the appropriate particle size. Only then can further enrichment and purification. 3. Separation and purification      After the above process, phosphate ore into the final separation and purification steps, phosphate ore purification are mainly heavy media separation, photoelectric separation, calcination, flotation, magnetic separation. 1) Flotation     Flotation mainly has positive and negative flotation, mainly using phosphate ore and miscellaneous ore physical properties are different, the use of flotation agents to make phosphate ore float or sink, so as to achieve the purpose of separation. 2) Magnetic separation      The use of iron-containing magnetic minerals in phosphate ore, under the action of magnetic separator, and non-magnetic vein recovery of phosphate ore containing iron magnetic minerals separation. 3)Calcination     Mainly used to remove organic matter, carbon dioxide and part of the fluorine in the phosphate ore, calcination temperature of 400 ~ 1400 ℃, depending on the purpose. 4)Photoelectric sorting     Mainly phosphate ore after crushing, the use of ore surface characteristics differences, through the color sorter or artificial intelligence sorter for sorting. 5)Heavy media sorting    Using the difference in density between phosphate ore and other minerals, a medium is selected so that one medium floats and the other sinks, thus achieving enrichment.      The above is the way of phosphate ore sorting and purification applications, where the mainstream sorting is mainly using heavy media sorting and photoelectric sorting (X-ray sorting), a small number of flotation, magnetic, calcination process. Next, we will elaborate on the mainstream phosphate ore separation and purification process. First of all, heavy media sorting is the use of phosphate ore, dolomite, shale specific gravity differences to sort, where phosphate ore, dolomite, shale density distribution of 2.2g/cm³, 2.8-2.9g/cm³, 2.55 ~ 2.65g/cm³, in the actual sorting process, subject to the influence of a number of factors, phosphate enrichment has nearly 8% or so dolomite carry out, greatly affecting the phosphate enrichment after the quality.       At the same time, there are some phosphate mining enterprises have used X-ray equipment for sorting, X-ray equipment sorting is similar to heavy media sorting, mainly using the density difference between mineralized and non-mineralized materials for sorting, in the field production process, because the phosphate ore and associated ore density difference value is small, imaging is closer, there will be throwing waste tailings phosphate ore with high, the actual application of phosphate ore is not particularly ideal. The current stage of the situation and problems faced by phosphate ore sorting, the introduction of artificial intelligence sorting machine, the main principle is the use of phosphate ore surface characteristics of the differences in sorting, to accurately identify the phosphate ore and dolomite and shale surface texture, luster, color, shape and other characteristics of the subtle differences, a composite sorting, sorting effect is higher than the current stage of phosphate ore enrichment accuracy and effectiveness.       Mingde photoelectric recently used artificial intelligence ore sorting machine,digital color separating machine, sorting phosphate ore original grade of about 20, after enrichment of the concentrate grade of about 30, tailings in the phosphate ore grade is less than 5. fully able to meet the target sorting requirements. At the same time, it can guarantee the amount of bad material to be taken out under the premise of enriching the phosphate ore grade, and also take into account the rate of good material to be taken out from the waste tailings.   Here is the phosphate ore after sorting Mingde photoelectric focus on the field of ore sorting, after a long period of technical accumulation and ore field of sorting applications, the introduction of four series of more than 20 products, widely used in fluorite, talc, wollastonite, high crystal silicon, iron ore, gold ore, lead and zinc ore, coal and coal gangue, vanadium ore and nearly 100 kinds of metal, non-metallic ore field of sorting applications.     Edit by Jacky
  • How to choose ore color sorter? How to choose ore color sorter? Nov 24, 2022
    How to choose ore color sorter? Color sorter as a high-end material sorting equipment, has now been widely used in ore, agricultural food, oil, chemical, pharmaceutical and other industries, the significance of its existence is not only to save time, energy, high efficiency, but also can greatly improve the utilization of resources to achieve greater economic and social benefits.   How to choose the right color sorter?      It is decided by demand-oriented. The main problem in how the equipment output, sorting effect, applicable particle size range, sorting type, equipment stability, service life, price and other multiple factors, ultimately comes down to how the comprehensive cost performance of the equipment.    As a well-known enterprise deeply rooted in Hefei, the capital of colour sorter, Mingde Optoelectronics has been deeply engaged in the field of ore sorting since 2014, with independent self-research of color sorter and X-light intelligent ore sorter and artificial intelligence machine with completely independent intellectual property rights. During this period, according to the continuous accumulation of all kinds of ore sorting experience, Mingde photoelectric constantly invested in equipment development and production, always keep technical innovation, and gradually launched a large output, high precision, high stability of super cost-effective models. How to choose a manufacturer with technical advantages for ore sorting?     As a senior ore sorting manufacturer, Mingde Optoelectronics launched AI artificial intelligence sorting machine, which brings ore sorting from 2.0 color sorting era to 3.0 multi-dimensional characteristics sorting era, breaking through the limitations of color sorting technology     Colour sorting machine to artificial intelligence sorting machine development is 1 to N progress, from color sorting machine sorting can only be sorted by color, to artificial intelligence sorting machine through the ore multi-dimensional characteristics, such as texture, color, shape, color, gloss and other naked eye visible differentiation characteristics of the progress. Artificial intelligence machine can all be extracted, learning, modeling, sorting. Thus, there is a great improvement in sorting personalization, sorting diversification, and sorting efficiency.      A good product needs to be approved by the market. Our Mingde photoelectric artificial intelligence sorting machine after nearly 3 years, in the project, research and development, production, application after layers of gatekeepers, now has been widely used in talc, magnesite, wollastonite, industrial silicon, gold ore, fluorite, lithium ore and other enterprises, to solve all kinds of ore sorting problems.       Ore sorting machine as a high precision machine, used in some remote areas and complex working environment, facing a variety of tests, a perfect after-sales service system is particularly important, famous photoelectric as a well-known old photoelectric sorting manufacturers, we always adhere to the user first, the service concept of the heart escort, and practical action to achieve our commitment, set up more than ten offices in the country, timely We have set up more than ten offices in the country to respond to the needs of customers and ensure the punctuality and timeliness of after-sales service.
  • Long life of Mineral separator should be maintained routinely Long life of Mineral separator should be maintained routinely Dec 07, 2022
    Long life of Mineral separator should be maintained routinely   Each machine has its own service life, but we sometimes find that it is actually not so long, is the manufacturer lying? No, the machine is like the human body, people will be sick, need to recuperate, the machine is the same, the machine will be damaged, it needs maintenance. The machine will be damaged, it needs maintenance. Here, the color sorter engineer here to the majority of the name of the photoelectric users to provide optical sorting machine daily maintenance methods, do the following items, your ore sorting machine can maintain a longer life use.  1, ash scraper dust removed  Once a week with ash cleaning air gun to clean the dust on the ash scraper leather (hair) brush; once a month to check whether the leather (hair) brush is running smoothly, if there is loose, tighten the loose position. Use a period of time if the skin (hair) brush of the soft skin (hair) tilted to one side, you can take off the skin (hair) brush up and down to adjust it can continue to use.  2、Sorting room dust removed  Color sorting machine sorting indoor and outdoor glass such as dust (generally the sorting room before the glass), wipe with a clean soft cloth dipped in alcohol, while checking whether the ash scraper is running normally. When the glass surface is completely dry and clean, then color sorting. 3、Filter drainage All pneumatic supply part of the machine filter device, must do diligent drainage (at least 2 times per shift) to prevent all kinds of impurities into the core components of the machine damage the machine, so as not to cause unnecessary losses. 4、Maintenance operation before each use. Check the color sorter, air compressor, air storage tank, filter and other parts are intact, there is no loose, cleaning the dust and drainage of various parts.  5、Check in operation Check the signal indication (including work indication, alarm indication) and spray valve action during the operation of the color sorter.  6、Maintenance operation after work stop  Please use the air gun to clean up the vibrator (especially the material condensed in the vibrator bucket), the inside of the body, the receiving hopper, and the dust scraping brush.    Note: When cleaning the receiving hopper with the air gun, it is strictly forbidden to blow the air gun directly into the nozzle opening. Otherwise it will cause damage to the spray valve! Monthly: Check the filter element; check the cleanliness of the dust scraping brush.     Precautions for areas with high humidity (1) The humidity in the southern region is high, it is recommended that customers install two moisture filters. (2) the user depending on the site, at least once every two hours to drain, otherwise moisture into the machine will shorten the life of the machine. (3) each filter in the gas circuit (including the internal machine), timely check the drainage situation, and replace the filter element from time to time. (4) careful maintenance to ensure the normal operation of the machine, but also can effectively extend the life of the machine.           Warning: When cleaning or changing the various parts of the machine, please first turn off the power through the on/off button, and then place the air switch on the side of the main unit in the OFF position before cleaning or changing.          Note: Please do not touch the CCD camera lens of the intelligent color CCD color sorter, if the setting and adjustment is not correct, it will affect the color selection effect.
  • Tailings problem, gold companies to solve this way ...... Tailings problem, gold companies to solve this way ...... Jun 29, 2023
    Tailings problem, gold companies to solve this way ......   Tailings usually refers to mine solid waste that is not suitable for further sorting and recovery under the prevailing conditions after mine beneficiation. And tailings storage simply refers to the construction of a dam to intercept the valley mouth or enclose the land constituted to stockpile metal or non-metallic mines for ore beneficiation after the discharge of tailings or other industrial waste places.   At present, there are nearly 10,000 tailing ponds in China, and the number of tailing ponds is large and widely distributed. Tailings pond environmental management base is weak, coupled with the tailings pond pollution hidden strong, some tailings ponds adjacent to important rivers, drinking water sources and other ecologically sensitive targets, pollution prevention measures are not perfect, operation and management is not standardized, environmental risks are more prominent.   Tailings pollution problem should not be underestimated   The problem of tailings is extremely prominent in the mining pollution problems that have occurred in recent years. The 2011 Yunnan Qujing chrome slag pollution incident, resulting in the death of sheep, pigs and undrinkable water; a mining company in Shaanxi Province in 2012 discharged ore processing slag through a river berm, affecting the arable land of downstream villages and the lives and property of residents; 2015, a company located in Longnan City tailings pond leakage, resulting in a sudden environmental incident across Gansu, Shaanxi and Sichuan provinces, causing a certain impact on the production and living water of some people along the line, and directly threatening the safety of water supply to local residents; In 2020, a mining company tailings pond in Heilongjiang Province leaked, causing the local first water plant to stop taking water, and some river sections, farmland and woodland pollution in Yichun City and Suihua City ...... These lessons always remind us that the pollution problem caused by tailings cannot be underestimated and must be taken seriously. The Law of the People's Republic of China on Environmental Prevention and Control of Solid Waste Pollution (amended in 2020) requires that adhering to the principles of reduction, resourcefulness and harmlessness, mining enterprises should adopt scientific mining methods and beneficiation processes to reduce the amount of tailings, coal gangue, waste rock and other mining solid waste generated and stored. At the same time, the state encourages the adoption of advanced technology for tailings, coal gangue, waste rock and other mining solid waste for comprehensive utilization. Tailings, coal gangue, waste rock and other mining solid waste storage facilities after the cessation of use, mining enterprises should be sealed in accordance with national regulations on environmental protection and other provisions to prevent environmental pollution and ecological damage. In 2022, the Ministry of Ecology and Environment issued the "tailings pollution prevention and management measures," "tailings pond pollution hidden danger investigation and management technical guidelines (for trial implementation)" to risk prevention and control as the core implementation of tailings pond classification and classification of environmental management, and firmly guard the bottom line of ecological and environmental security. At the same time continue to promote the Yangtze River economic belt, the Yellow River basin and other key areas, watershed tailing pond pollution management, strengthen the flood tailing pond pollution hidden danger investigation and management, and improve the tailing pond environmental supervision infrastructure capacity, further improve the tailing pond environmental information, build tailing pond environmental management information system, with information technology means to enhance the tailing pond environmental management capacity and level, enhance the ecological environment departments around the tailing pond Pollution management level and environmental supervision capacity. And the World Gold Council also reflects the high importance it places on tailings and emissions management in its 2019 release of the Responsible Gold Mining Principles (RGMP) - we will ensure that environmental responsibility is at the heart of our operations and will follow ongoing management and governance actions that are consistent with accepted practices to design, construct, manage and abandoned tailings storage and heap leach facilities and major hydraulic infrastructure. At the same time, no new mines will be developed that would involve the use of riverine or shallow seabed tailings. Managing tailings gold companies have been taking action   For gold mining companies, the concern for ecological protection and the practice of the concept of "green water and green mountain is the silver mountain" is something that they need to improve and implement throughout their production management process. Many gold mining companies have been exploring and taking concrete actions to address the core issue of tailings management. In order to improve the tailings problem in the mining process, many enterprises use advanced AI ore sorting machine to enrich the tailings, enhance the grade of ore and reduce the tailings throwing. In order to improve the tailings problem in the mining process, many gold mining companies have adopted dust prevention and environmentally friendly mining methods. For example, in order to manage the adverse effects brought by tailings, all subsidiaries of China Gold Group have hardened or greened the exposed ground of industrial sites, and set up wind and dust suppression nets in the tailings storage and coal pile of the boiler house, equipped with watering trucks, and regularly sprinkled the site road surface, ore transportation road and tailings storage, which effectively reduce dust pollution. Ltd. as a tailing-free metal mine is implementing the filling method of mining, most of the tailing sand is used to fill the underground mining area, and the composition of the remaining tailing sand is tested, combined with the characteristics of tailing sand with high calcium content, small particles, easy to form, and high pressure resistance after drying, and actively cooperates with local cement plants and brick kiln factories, and part of it is supplied to relevant enterprises in proportion to maximize the value of the effective use of mineral resources. . The comprehensive utilization of tailings and waste rocks is another practice of gold mining enterprises to explore tailings management. For example, Zijin Mining Group has always given priority to the comprehensive utilization of tailings and waste rocks by means of underground filling, use as construction materials, vegetation restoration, road paving and recovery of valuable components, etc. The rest is stockpiled in drainage sites or tailing ponds that meet the national standards of the location, and the tailing ponds are impermeable in accordance with the requirements of the local standards to ensure the safety of groundwater quality downstream of the tailing ponds. The Group strictly follows the approved design plan for the operation of re-mining, sand discharge and drainage in the reservoir to ensure the safety of the tailing dam and the original flood discharge facilities, and conducts inspection and facility maintenance management in accordance with the relevant requirements of tailing pond safety management. After all the tailings back mining no longer carry out tailing operations, timely to the safety production supervision and management departments to fulfill the tailing pond cancellation procedures. At the same time, the tailing pond will be closed according to the regulations of tailing pond closure after the reuse production is completed. In addition, Anhui Taiping Mining Co., Ltd, a subsidiary of China Gold Group, also provides tailings sand after physical drying to road construction enterprises as raw materials, opening up a new way of mineral resources development and comprehensive utilization, which not only saves resources, but also provides a broader space for the company to expand the comprehensive utilization of tailings sand. Only by improving the utilization rate of water resources and protecting water resources can we achieve the long-term and stable development of gold mining enterprises. The recycling of water resources has also become a major direction for gold mining enterprises in the management of tailings. In China Gold Group, most of the mining enterprises adopt the tailing slag press filter dry discharge technology, adopt press filter dry discharge for tailing, and recycle water resources, all wastewater is not discharged, and the water recycling rate reaches more than 92%. For example, after the tailing wastewater is clarified and treated, it flows into the return dam under the tailing reservoir and is pumped back to the high level pool of the processing plant for flotation production recycling, and the water in the tailing reservoir is not discharged. In addition, Tong Hui Mining, a subsidiary of Zhajin Mining, has invested more than 6 million yuan to build a tailing wastewater recycling system and an underground mine brine water recycling system, and laid a wastewater recycling and reuse pipeline, so that all the recycled wastewater can be used for production reuse after treatment, which can reduce the amount of new water used for ore dressing by more than 2 million cubic meters per year and realize the efficient recycling of ore dressing wastewater. Zero discharge" and 100% "reuse" of saline water under the mine, ensuring the coordinated development and green development of the production system and the ecosystem. For the tailing sand produced by the beneficiation plant, Tong Hui Mining actively carries out project research and development, using the tailing sand to carry out the paste cement filling project, filling more than 70% of the tailing sand into the underground mining area and the former surface collapse area after thickening, reducing the amount of tailing sand discharge, effectively extending the service life of the tailing pond, and generating good social and ecological benefits. In addition to tailings management in the mining process, gold mining enterprises are also exploring and practicing in pre-mining assessment and post-operation ecological restoration. Before the construction of each project, Zhaogold Mining Co., Ltd. conducts environmental impact assessment in strict accordance with the procedures, analyzes the possible impact on the environment after the project is completed and put into operation, and proposes countermeasures and measures to prevent pollution. At the same time, Zhaogold Mining, in addition to conscientiously fulfilling the procedures of environmental protection acceptance of project completion, carries out comprehensive recycling of the waste left behind in the production process, focuses on strengthening the comprehensive management of mining areas and tailing ponds, and does a good job of mine greening, beautification and ecological environment construction to further improve the environmental situation around the enterprise. In February this year, Serbia's Zijin Copper Boer River comprehensive environmental management project officially dug into the construction. After the completion of the project will enhance the tailings storage and open pit safety operation capacity, improve the ecological environment of the natural water system in the downstream section of the Pol River and Timok (Timok), with good ecological and social benefits. Zijin Por copper mine insists on creating a "garden mine" and vigorously implements greening and reclamation. At present, all tailing ponds, open pit slopes and slopes of some abandoned dumps have been greened, with more than 60,000 seedlings planted and a new greening area of about 350,000 square meters, giving the mine and plant areas a new look. The project has also taken many measures to control dust, solid waste, waste water and waste gas, with remarkable results. In addition, some gold mining enterprises have also built a model combining "industry, academia and research" to promote tailings management. For example, Shandong Gold Group, in view of the common problems such as the high emission of gold tailings and the high disposal cost and safety and environmental protection pressure caused by the residual cyanide in the smelting cyanide slag, has organized relevant enterprises and strong scientific research institutes in China to jointly establish the "Joint Innovation Research Base for Resourceful Utilization of Gold Tailings", with the theme of low-cost resourceful disposal of gold tailings. Low-cost resource utilization disposal is the theme, using AI ore sorting machine ,Mineral separator  , bulk ore sorting system and optical sorting machine to enrich the grade ,reducing the tailing, giving full play to the advantages of internal and external resources, to overcome the key technology of resource utilization of tailings, to build a demonstration project of ecological disposal of tailings, and to solve the problem of "neck" of tailings disposal. The waste stone is widely used for underground filling, tailing reservoir dam building, building stone, etc. The tailing sand is comprehensively used for underground filling, outbound transportation, construction materials, etc. The comprehensive disposal rate of tailing sand is greatly improved. Among them, Xinhui Company and Hainan Shanjin Company took the lead in building a tailing-free mine, realizing comprehensive recycling and turning waste into treasure, and its advanced experience and practices are being promoted and applied in other mines. At the same time to strengthen the whole process of standardized management of hazardous waste, the enterprises belong to the establishment of standardized hazardous waste temporary storage room, the strict implementation of the five-linked list system, to achieve the collection, utilization, temporary storage, transportation, utilization and disposal of hazardous waste for the whole process of standardized management.    

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