For polymetalic processing,we norlmally use anionic polyacrylamide and nonionic polyacrylamide.it depend on the mineralization situation and confirm the optimum models according to the Jar test or site test.
1．Gold / silver
To join in the mineral water and lime, through further grinding mill, In the next step for settling thickener, this stage using anionic polyacrylamide, promote the rapid settling of solid, the substrate through a series of filter tank for filtering.
Anionic polyacrylamide flocculant is added in in front of the filtration thickener.
2.alumina Ore
During the aluminum processing through Bayer, sintering, the aluminum mineral are firstly grinded into 1mm size, then putting into strong sodium hydroxide by high-temperature and high pressure. The aluminum mineral can be dissolved in the high-caustic solution, and the silicon will be dissolved but other impurity remained.
After digestion the sand particles are removed with the slurry being settled in primary thickeners where the flocculants is added. This is a critical stage in achieving very clear overflow clarities. The underflow, or red mud, then passes to a counter current decantation process where further alumina from the liquor is recovered via a series of washer decanters. Again flocculants is used here to promote settling and acceptable overflow clarities.
The pregnant liquor from the primary thickeners is filtered, then cooled (taking up to 48 hours) and seeded with alumina hydrate to promote precipitation of alumina trihydrate. This is then filtered and washed finally calcined to produce alumina.
3、coal industry
After the coal is exploited, it is usually mixed with other kinds of waste. Firstly, they are separated according to their different gravity in water, the coal is suspended, and the waste gets down.
In the following process, by using flotation agent, the fine coal particle and the waste are further separated. Fine coal floats and the waste is down.
Then the fine coal is refined from the waste by sedimentation, filtration or centrifugation. CHINAFLOC is used in the process of sedimentation, promoting the separation of solid and liquid, and then the clean water is recycled back from the overflow by the thickener, the fine coal particle is generated after filtration and centrifugation. CHINAFLOC is used again in the process of filtration and centrifugation to improve the efficiency of separation.
