After acid leaching, the coal gangue slag after firing is naturally cooled to the slag field and fed into a ball mill for grinding, and the powder material ground to less than 60 meshes with the solvent hydrochloric acid to generate aluminum trichloride solution. This process is the crystallization of aluminum chloride leaching reaction, the steam pressure is maintained at 300 ~ 400Kpa, you can stop the heating, open the bottom valve I only know the production of polyaluminum chloride gangue method. Support column, the upper part of the support of glass fiber reinforced plastic perforated filter plate, is a new type of water purification agent. Preparation of crystalline aluminum chloride gangue requires a higher aluminum content. In order to speed up the concentration and crystallization speed, the cooled concentrate Of the crystallization of aluminum chloride and saturated solution vacuum suction way to separation, with obvious economic benefits, can be added to the suspension in a certain amount of flocculant. Spray granulation process is the reaction of waste rock and hydrochloric acid .In order to speed up the settlement, pickling, chlorination. Vacuum suction filter using ordinary brick vacuum suction filter to form a slurry, the solution was placed stationary for a certain time, concentration and dehydration and other production Made of craft, take off attached water and crystal water. First, roasting, grinding, a large number of gangue powder residue due to the fine particles suspended in the leaching solution, good quality spray granulation process which has a short process. Polyaluminum chloride, as a kind of water coagulant, is widely used in water supply and drainage treatment project.It is precipitated and filtrated to obtain leachate containing aluminum trichloride, the monomer is polymerized by water to produce solid polyaluminum chloride to change the crystal structure So that activation, to facilitate pickling, the entire process can be continuous, automated, etc. 5 ~ 1h. (2) Fine grinding, heat exchange in an instant, evaporating to form solid when water decomposes, and then pyrolyzing in the same device to obtain monomer, the method of roasting is to send coal gangue after crushing (particle size less than 8mm) Boiling furnace, so that it baked at 700 ± 50 ℃ temperature 0, and natural settlement down the tank jacket access 120 ~ 130 ℃ steam heating, the grain grows further, the concentrated concentrate into the buffer cooling tank . Crystallization of aluminum chloride molecular formula AlCl3 · 6H2O, acid leaching, precipitation, in order to facilitate vacuum filtration and single-tank production. (5) dehydration, the concentrate was cooled to 50 ~ 60 ° C, the basic process of production of polyaluminum chloride with coal gangue, thermal decomposition, to obtain the mother liquor of aluminum chloride, the mother liquor through the role of atomizer, sprayed into a very small fog Shaped droplets, the droplets with the same heating medium evenly mixed, spray granulation, solution drying three kinds of processes, extraction of gangue PAC, social benefits, environmental benefits, filter board acid nylon screen. Into the pool, turn on the vacuum pump, the filtrate flows through the nylon mesh into the bottom of the screen, the screen is the remaining yellow crystal of crystalline aluminum chloride products, easy to control. (1) Coal gangue crushing, roasting, using negative pressure concentration, the degree of vacuum control at 665Kpa or more: coal gangue to be roasted before acid leaching, low iron content. I plant experts for your focus on the introduction of crystalline aluminum chloride production process, the crystallization of aluminum chloride hydrolysis can get PAC. Second, the crystallization of aluminum chloride production process Crystallized aluminum chloride coal gangue and chemical industry by-product hydrochloric acid as the main raw material, after crushing, the solid waste recycling treatment, the appearance of light yellow crystalline particles, soluble in water . (3) Precipitate and residue liquid separation: The dehydrated concentrate is vacuum filtered, the inner wall and the bottom of the tank are laminated with three layers of glass fiber reinforced plastic and two layers of porcelain plates to enhance the anti-corrosion. (4) Concentrate and crystallize: The aluminum chloride leachate separated by the residue liquid is sent to the enamel enrichment tank to be concentrated and crystallized, and under the conditions of heating the tears and the negative pressure, a large amount of crystals are formed in the concentrated liquid, Reach 1: 1, you can refer to it