{"id":7021,"date":"2022-09-11T07:06:19","date_gmt":"2022-09-10T23:06:19","guid":{"rendered":"https:\/\/www.xiaoxianmi.cn\/?p=7021"},"modified":"2022-10-10T08:43:14","modified_gmt":"2022-10-10T00:43:14","slug":"%e9%80%89%e7%85%a4%e5%8e%82%e7%bb%86%e7%85%a4%e6%b3%a5%e5%9b%9e%e6%94%b6%e5%a4%84%e7%90%86%e5%b7%a5%e8%89%ba","status":"publish","type":"post","link":"https:\/\/www.xiaoxianmi.cn\/en\/7021.html","title":{"rendered":"Fine Coal Slurry Recovery Process in Coal Processing Plant"},"content":{"rendered":"

introductory<\/p>\n

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1) Filter press separate recycling process. Filter press can realise clear water in one press, and it is the ideal gatekeeper for the closed circuit recycling of washing water in coal beneficiation plant. This process is suitable for all power coal processing plants, especially for coal slurry content is small, and the content of fine-grained slurry in the coal slurry is more, it is the ideal process for the fine slurry dewatering and recycling system of the coal processing plant with more serious mud phenomenon.<\/p>\n

2) Pressurised filter separate recovery process. Pressurised filter has the advantages of good dewatering effect, large processing capacity, and loose and easy mixing of filtered products. This process is suitable for coal slurry content is larger, less fine sludge content of the coal processing plant, while requiring a higher degree of automation of the washing process, and the use of pressurised filters to do the industrial test is better, or in the same mine to deal with the same type of coal when the effect is more pronounced in the coal processing plant. Pressurised filter feed in general -0.045mm particle content is less than 40%, coal slurry recovery effect is better, for the serious mud, fine-grained material content is higher in the coal plant, because of its high content of fine-grained materials, will lead to pressurised filter capacity is greatly reduced, and even equipment can not operate normally.<\/p>\n

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1)\u538b\u6ee4\u56de\u6536\u7cfb\u7edf\u3001\u7164\u6ce5\u667e\u5e72\u573a\u96c6\u4e2d\u4e00\u4f53\u5e03\u7f6e\u3002\u538b\u6ee4\u56de\u6536\u7cfb\u7edf\u5355\u72ec\u5448\u538b\u6ee4\u8f66\u95f4\u5e03\u7f6e,\u5e76\u4e0e\u7164\u6ce5\u667e\u5e72\u573a\u96c6\u4e2d\u4e00\u4f53\u5e03\u7f6e\u3002\u538b\u6ee4\u8f66\u95f4\u4e24\u5c42\u5e03\u7f6e,\u4e8c\u5c42\u5e03\u7f6e\u5165\u6599\u6405\u62cc\u6876\u548c\u538b\u6ee4\u673a,\u4e00\u5c42\u90e8\u5206\u5e03\u7f6e\u5165\u6599\u6cf5\u7b49\u8bbe\u5907,\u90e8\u5206\u505a\u7164\u6ce5\u843d\u5730\u573a\u5730;\u7164\u6ce5\u667e\u5e72\u573a\u5e03\u7f6e\u5728\u4e00\u5c42\u3002\u8be5\u5de5\u827a\u6d41\u7a0b\u4e3a\u538b\u6ee4\u673a\u62c9\u677f\u5378\u6599\u7684\u7164\u6ce5\u76f4\u63a5\u843d\u81f3\u4e00\u5c42\u5730\u9762\u7f13\u51b2\u5806\u653e,\u901a\u8fc7\u94f2\u8f66\u94f2\u5165\u7164\u6ce5\u667e\u5e72\u573a\u5185\u8fdb\u884c\u81ea\u7136\u667e\u5e72\u540e\u5916\u8fd0\u3002\u8be5\u5e03\u7f6e\u5f62\u5f0f\u9002\u7528\u4e8e\u5de5\u4e1a\u573a\u5730\u4f4d\u7f6e\u53d7\u9650,\u4e3b\u5382\u623f\u5468\u56f4\u573a\u5730\u4e0d\u8db3,\u4e14\u6ca1\u6709\u538b\u6ee4\u8f66\u95f4\u3001\u7164\u6ce5\u667e\u5e72\u573a\u5206\u5f00\u5e03\u7f6e\u573a\u5730;\u539f\u7164\u7164\u8d28\u8f83\u5dee,\u538b\u6ee4\u8131\u6c34\u6548\u679c\u8f83\u5dee,\u7164\u6ce5\u6c34\u5206\u3001\u7070\u5206\u5747\u504f\u9ad8,\u53d1\u70ed\u91cf\u8f83\u4f4e,\u4e0d\u9002\u5b9c\u76f4\u63a5\u63ba\u5165\u672b\u7164\u4ea7\u54c1\u4e2d;\u7164\u6ce5\u542b\u6c34\u91cf\u592a\u9ad8,\u4e0d\u9002\u5408\u80f6\u5e26\u8f6c\u8f7d;\u7164\u6ce5\u71c3\u70b9\u4f4e,\u4e0d\u9002\u7528\u8fdb\u884c\u5e72\u71e5\u964d\u6c34[6];\u7164\u6ce5\u5e72\u71e5\u6210\u672c\u592a\u9ad8,\u6ca1\u6709\u7ecf\u6d4e\u6548\u76ca\u7684\u9009\u7164\u5382\u3002<\/p>\n

2) Filter press recovery system and coal slurry drying yard are arranged separately. The filter press recovery system is arranged separately in the filter press workshop, and the coal slurry drying yard is arranged separately. The filter press workshop is arranged in two layers, the second layer is arranged with feed mixing barrel and filter press, the first layer is partly arranged with feed pump, filtrate pump, coal slurry collecting scraper and transferring belt conveyor, etc. The coal slurry drying yard is arranged according to the closed coal slurry drying yard. The coal slurry drying yard is set up according to the closed coal shed. The process flow is that the coal sludge unloaded from the pulling plate of the filter press falls directly to the collecting scraper on the ground floor, feeds to the transferring belt conveyor, and then is transported to the coal sludge drying yard for unloading and stacking, and then is naturally dried or dried and transported out. This arrangement form is suitable for industrial site location restrictions, insufficient space around the main plant, filter press workshop, coal slurry drying field can not be centrally arranged; raw coal quality is poor, the effect of filter press dewatering is poor, slurry moisture, ash are high, low calorific value, it is not suitable for direct blending into the final coal products; coal slurry drying field needs to be arranged in the drying facilities of the coal preparation plant.<\/p>\n

3) Filter press recovery system, main plant and coal slurry drying yard are centrally arranged as a whole. Filter press recovery system and coal sludge drying yard are arranged in one side of the main plant, with two layers, the second layer is arranged with feeding mixing drum and filter press, the first layer is partly arranged with feeding pump and other equipment, and partly as a coal sludge landing site; the coal sludge drying yard is arranged on one layer. The process is that the coal slurry discharged from the filter press pulling plate directly falls to the ground buffer pile on the ground floor, and is shovelled into the coal slurry drying field by shovel to dry naturally and then transported out. This arrangement form is suitable for the industrial site is flat and spacious, convenient for centralised arrangement; the raw coal quality is poor, the effect of filtering and dewatering is poor, the moisture and ash content of coal slurry are high, the heat content is low, it is not suitable for directly mixing into the final coal products; the one-piece arrangement meets the requirements of fire protection partition; the moisture content of coal slurry is too high, it is not suitable for the tape reproduction; the burning point of coal slurry is low, it is not suitable for drying and descaling; the cost of drying coal slurry is too high, it does not have economic benefits. Coal processing plant.<\/p>\n

4) The filter press recovery system and the main plant are centrally arranged as a whole, and the coal slurry drying yard is arranged separately. Filter press recovery system is arranged in one side of the main plant, with two layers, the second layer is arranged with feed mixing barrel and filter press, the first layer is arranged with feed pump, filtrate pump, coal slurry collection scraper and transfer belt conveyor. The coal slurry drying yard is set up according to the closed coal shed. The process flow is that the coal slurry unloaded from the pulling plate of the filter press falls directly to the collecting scraper on the ground floor, and then feeds to the transferring belt conveyor, and is transported to the coal slurry drying yard for unloading and stacking, and then is naturally dried or dried in the coal slurry drying yard for external transport. This arrangement form is one of the most commonly used arrangement forms for power coal processing plant. This arrangement form is suitable for the industrial site is flat and spacious, the space location is rich; the raw coal quality is poor, the effect of filtering and dewatering is poor, the moisture and ash content of coal slurry are on the high side, the calorific value is low, it is not suitable to be directly mixed into the final coal products; the coal slurry drying field needs to be arranged with drying facilities of the coal beneficiation plant.<\/p>\n

5) Filter press recovery system is arranged separately, and the coal slurry is blended back into the final coal products. Filter press recovery system is arranged separately in the filter press workshop, which is arranged in two layers, the second layer is arranged with feed mixing drum and filter press, and the first layer is arranged with feed pumps, filtrate pumps, coal slurry collection scraper and transfer belt conveyor, etc. The process is that the coal slurry discharged from the pulling plate of the filter press falls directly to the collection scraper, and then feeds to the transfer belt conveyor. The process flow is that the coal slurry discharged from the filter press pulling plate falls directly to the first layer of collection scraper, and then feeds to the reproduction belt conveyor, and is transported to the end of the coal product belt conveyor for blending into the silo. This arrangement form is suitable for industrial site location restrictions, the main plant is not enough space around the main plant, the filter press workshop can not be centrally arranged with the main plant; the raw coal quality is good, the filter press dewatering effect is good, the coal slurry has a high calorific value and is suitable for blending into the final coal products; the integrated arrangement with the main plant can not meet the requirements of the fire protection zoning, and only a separate arrangement can meet the requirements of the fire protection of the coal processing plant.<\/p>\n

6) Filter press recovery system is centrally arranged with the main plant, and the coal slurry is blended back into the final coal products. Filter press recovery system is arranged in one side of the main plant, with two layers, the second layer is arranged with feed mixing drum and filter press, the first layer is partly arranged with feed pump, filtrate pump, coal slurry collection scraper and reproduction belt conveyor, etc. The process is that the coal slurry unloaded from the pull plate of the filter press falls directly to the collection scraper and reproduction belt conveyor. The process flow is that the coal slurry unloaded from the filter press pulling plate falls directly to the first layer of collection scraper, and then feeds to the reproduction belt conveyor, and is transported to the main plant for blending into the silo on the belt conveyor of the final coal products. This arrangement is also one of the most commonly used arrangement forms in power coal processing plants. This arrangement is suitable for the coal processing plant with flat and spacious industrial site, rich space location; good quality of raw coal, good dewatering effect of filter press, high heat content of coal slurry, which is suitable for blending into the final coal products; and the integrated arrangement with the main plant to meet the requirements of fire protection zoning. By comparing the six process arrangement forms of the filter press recovery system, combined with the general layout of the industrial site of the coal processing plant in Bourdong Coal Mine, as shown in Figure 1.<\/p>\n

\"\u9009\u7164\u5382\u7ec6\u7164\u6ce5\u56de\u6536\u5904\u7406\u5de5\u827a-\u677f\u6846\u53a2\u5f0f\u9694\u819c\u538b\u6ee4\u673a\"<\/p>\n

It can be seen that Bourdong coal processing plant is in the existing mine industrial site new arrangement, the existing industrial site is narrow, the remaining space is small and scattered, can not be newly purchased land, the main plant around the site is not enough, so there is no filter press workshop, coal slurry drying field separate layout site, coal slurry low ignition point is not suitable for drying and precipitation, fine coal slurry in the high-density material kaolin content is more high moisture, combined with the neighbourhood of the actual production of coal plant Combined with the actual production experience of neighbouring coal processing plants, the belt conveyor transport is easy to slip, and the ash content is high, which is not suitable for the coal slurry directly back to mixing the final coal product layout form, so the fine coal slurry recycling system of this coal processing plant is arranged in the form of a centralised integrated arrangement of the filter-pressing and recycling system and the coal slurry drying field.<\/p>\n

4 Conclusion<\/p>\n

1)The content of fine coal slurry is high in the coal processing plant of Bourdong coal mine, and the raw coal is easy to be sludged, so it is suitable to use the filter press recovery process to recover the fine coal slurry.<\/p>\n

2)The fine coal slurry of Boerdong coal mine coal processing plant has the characteristics of high moisture, high ash, low ignition point, etc., the existing industrial site is narrow, the remaining space is small and scattered, and it is not possible to add new land, therefore, the fine coal slurry recycling system of the plant is arranged in the form of filter-pressing and recycling system, and the slurry drying field is centrally arranged in the form of a single unit, which not only can make full use of the existing site space and improve the competitiveness of the final coal products, but also can create good economic benefits for the coal processing plant. economic benefits for the coal processing plant.<\/p>\n


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