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- COD AND BOD REMOVAL
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- the polyacrylamide market in 2017-2020
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Anionic polyacrylamide application involves mining, ore dressing and metallurgy. Through the use of polyacrylamide, can promote the effective solid matter soon settlement, or speed up the fine objects of concentrated, to improve the solid-liquid separation effect, reduce the tailings loss and environmental pollution, reduce production cost.
Processing of minerals under normal circumstances, the need of high molecular weight products, in order to ensure the settlement speed centrifugal process, good effect, easy to obtain good economy effect.
1 coal industry coal in mined, classified according to the different size, according to the proportion of coal particles and impurities in water medium to realize the separation of coal in different water, floating on top, impurities sink to the bottom, the treated coal classification, so as to obtain a product.
Powdered coal produced in the above process, which needs further processing of coal recovery. Complete the process usually uses flotation, add the flocculant and coagulant aids, improve the separation efficiency of coal and the impurity, coal flotation tailing coal subsidence. The flotation clean coal through sedimentation, filtration or centrifugation the recovery of coal, the process using anionic polyacrylamide as flocculating agent, the promotion of solid-liquid separation, and then filtered and centrifuged in the thickener, again using the anionic polyacrylamide flocculant.
2 gold and silver crushing sieving after the use of mineral grinding machine with water, lime further ground, settlement in the next step of thickener, this stage the use of anionic polyacrylamide, rapid subsidence and promote solid, substrate is filtered through a series of filter tank. Anionic polyacrylamide flocculant adding thickener filter in front of the.
Separation process of 3 lead and zinc in zinc sulfide minerals in: by calcination is oxidized to Zinc Oxide. Next to the oxide leaching with sulfuric acid. In about 5 of PH neutral filtrate and PH acidic filtrate 2.5 can make all concentrate dissolved in sulfuric acid. Some concentrator increases a heat filter concentration process to further improve the recovery rate. Inverse reflux settlement system is usually used for overflow neutral enrichment purification.
In the Pb Zn filtration process, the use of anionic polyacrylamide flocculant, promoting mineral rapid subsidence and filtrate clarifying and improving process of production efficiency, reduce the loss of minerals.
4 Aluminum Mine in aluminum processing firstly in the process of mineral crushing crushed to less than 1mm. Adding concentrated sodium hydroxide and high temperature and high pressure. Dissolved aluminum in highly corrosive liquid, and in addition to other soluble silicon impurities are dissolved. Through the above process after the gravel together with after primary concentrated and precipitated pulp together be removed. In the primary thickening tank joined the anionic polyacrylamide flocculant. This is clarified by the overflow of the very important a process. Thickener underflow red mud through a reverse backflow settlement process. In this process in liquid aluminum after a series of washing and sedimentation pool to be recycled. At this time of anionic polyacrylamide was used again to promote the rapid subsidence and can meet the requirements of clear overflow. Aluminum rich primary thickening tank overflow after filtering, cooling (48 hours), three hydrate filling aluminum hydrate in order to promote the precipitation of aluminum. Then the obtained after filtering and washing the calcination of aluminium.