Method for improving quality, reducing cost and improving efficiency of ceramic raw materials prepared from granite stone waste rocks

Abstract

The invention provides a method for improving quality, reducing cost and improving efficiency of ceramic raw materials prepared from granite stone waste rocks. The method comprises the following steps: multi-stage crushing, laminated crushing, coarse grain pre-selection, pre-grading, partial ore grinding, multi-stage magnetic separation, grading separation, superconducting strong magnetic separation, grading dehydration and the like. The method is a pollution-free and environment-friendly physical technology in the whole process; compared with a traditional process, the comprehensive technicaland economic indexes are obviously improved, high-quality glass and ceramic raw materials with the K2O content of 6-10wt%, the Na2O content of 0.5-3.5wt%, the SiO2 content of 65-74wt% and the Fe2O3 content of 0.15wt% and the whiteness of 60-68 are obtained, the whiteness of the product is improved from 50-53 to 60-68 degrees, the yield is improved from 51-55% to 65-72%, and the treatment capacitycan be improved by 13-18%; the product structure is refined and diversified, and a proper product is provided for material homogenization, energy conservation and consumption reduction in the downstream glass and ceramic industry machining process.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of solid waste, in particular to a method for preparing ceramic raw materials from waste granite stones, especially a process that significantly increases production, improves quality, reduces costs and increases efficiency compared with traditional processing techniques. Background technique [0002] There are a total of more than 170 granite and stone solid waste resource concentration areas in my country, 21 industrial agglomeration areas with an annual increment of >10 million tons, 43 agglomeration areas with an annual increment of 3-10 million tons, and 105 agglomeration areas with an annual increment of 3 million to 10 million tons. Solid waste in the stone industry mainly comes from resource development-oriented industrial clusters, including Pingyi, Wulian, and Laizhou in Shandong; Nan'an, Fuding, and Hui'an in Fujian; Biyang, Nanzhao in Henan; Macheng, Suizhou, Tongsh...

AI Technical Summary

Problems solved by technology

[0004] The traditional mineral processing methods mainly include ore crushing and ball milling, purification and impurity removal, etc. The main disadvantage is that the energy consumption of crushing and milling is high, accounting for 60% of the total energy consumption; the steel-lined steel ball grinding process is easy to cause The loss of grinding medium material will cause secondary pollution to the product; full-grain grading will easily cause product over-grinding loss, difficult to recover fine-grained materials, and increase the cost of auxiliary engineering water treatment; purification and impurity removal mainly include magnetic separation process and flotation process In the magnetic separation process, the lower limit of the material particles processed by the existing high-gradient vertical ring magnetic separator is 20 μm, which is ineffective for fine-grained minerals below -20 μm, and the stand-alone equipment has large power and high energy consumption; the flotation process is carried out after the raw ore is ground In acidic or neutral environment, flotation agents are used to change the surface properties of mineral particles to achieve separation, purification and removal of impurities. Flotation agents are likely to cause water pollution, and the backwater cannot be directly recycled.

[0005] CN102276262A discloses a kind of production method that utilizes granite waste material to extract potassium-sodium-aluminum ceramic raw material, has the following problems: (1) the low-manganese-added chromium steel material of 1% manganese and 5% chromium is used in the abrasive material, and the loss of the grinding medium material has a great impact on the material Secondary pollution generated; (2) Using full-size grinding, there is a case of product mudification, resulting in low recovery rate of subsequent fine-grained products, difficult to remove impurities, etc.; (3) Using full-size magnetic separation to remove impurities , the impurity removal effect on fine-grained products is poor, and does not involve the recovery of fine-grained products, and there is a problem of low recovery rate of finished products; (4) The use of full-grain vacuum dehydration has the problem of high energy consumption for dehydration

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