Method for preparing ceramic raw material from waste granite stone

Abstract

The present invention proposes a method for preparing ceramic raw materials from granite stone waste rock, which includes multi-stage crushing, laminated crushing, coarse grain pre-selection, pre-grading, partial grinding, multi-stage magnetic separation, classification and separation, and superconducting strong magnetic separation And graded dehydration and other processes. The present invention is a pollution-free and environmentally friendly physical technology for the whole process; the comprehensive technical and economic indicators are significantly improved compared with the traditional technology, and K 2 O: 6‑10wt%, Na 2 O:0.5‑3.5wt%, SiO 2 :65‑74wt%, Fe 2 o 3 <0.15wt%, high-quality glass and ceramic raw materials with a whiteness of 60-68, the whiteness of the product is increased from 50-53 to 60-68 degrees, the yield is increased from 51-55% to 65-72%, and the processing capacity can be increased by 13% ‑18%; the product structure is refined and diversified, and suitable products are provided for material homogenization and energy saving and consumption reduction in the downstream glass and ceramic industries.

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 with significantly increased production 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, Tongshan, Xianfeng, and Luotian in Hubei; Hezhou and Cenxi in G...

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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