Coal mining industry will discharge a lot of coal mine water during the production process, without the solution of immediate discharge, not only lead to environmental pollution of the environment around the mine, but also consume a lot of precious water. The use of coal mine water source is to deal with the coal carbon plantation area is relatively serious less water and coal mine water pollution, the two confusing coal enterprise development trend of the difficulty of the basic clearly put forward. The process of coal mine Water Treatment depends on the way it is used, and the main solution for coal mine water is to remove suspended solids, various positive ions and other residues in the water. The basic process is to remove suspended solids, positive ions, and other residues from the water, so that it can be used for domestic or industrial purposes, and the basic process is concrete, sedimentation, filtration, and sterilization. Among them, the concrete (inclined plate sedimentation tank) solution is one of the key processing techniques in all the steps of coal mine wastewater treatment, and the selection of coagulant and the concrete experiment are the key criteria to ensure the actual effect of coal mine wastewater treatment. 
Different coagulant concentration value of coal mine water concrete actual effect of harm, in a certain concentration value category along with the concentration value of the elevation of the sludge load of coal mine water turbidity, different coagulant mud amount of coal mine water turbidity sludge load of harm, coal mine water quality sampling turbidity sludge load along with the elevation of the amount of coagulant mud to expand, when done to the highest value and then there is a reduction of the whole process. It is because of the coagulant mud amount is not enough, coagulant can not be sufficient with the suspended solids in the water to touch the reflection, water quality sampling in the suspended solids are still part of the suspended solids, and when too much coagulant application of colloidal solution particles to carry a positive charge, so that the colloidal solution particles in the middle of the electrostatic induction repulsion to enhance the suspended solids are once again in the smooth situation. And then cause the turbidity of the supernatant left increased. Sludge load is reduced; in addition, too much coagulant also "encapsulate" the particle surface layer, this kind of "encapsulation" effect weakens the cohesion between the particles work ability. When the concentration of suspended solids in the coal mine water is very low, the colloidal solution needs less positive charge, and the amount of coagulant can complete the colloidal solution electro-neutralization and destabilization when the amount of coagulant mud is relatively small, along with the expansion of the value of the concentration of suspended solids in the coal mine water, the total number of positive charge needed for the colloidal solution is expanded, and in order for the colloidal solution to achieve the effectiveness of the electro-neutralization destabilization of the suction, the amount of coagulant will be raised in relative terms.
Harmfulness of pH value to turbidity sludge loading
The sludge load of turbidity in the water quality sampling of coal mine water expands and then decreases with the expansion of pH value because pH value harms the zeta potential difference of the colloidal solution or the surface layer of the particles in the water, the hydrolysis reaction of the coagulant aid, and the shape of hydrolysis reaction substances, which immediately jeopardizes the actual effect of the coagulation and precipitation. The harm of coagulants and coagulants to the sludge load of coal mine water turbidity, within a certain amount of mud, the sludge load of coal mine water turbidity expands with the increase of the concentration value of Polymeric Aluminium Chloride and Polyacrylamide. The mutual application of Polymeric Aluminium Chloride and Flocculant has a significantly better effect on the removal of turbidity than when they are applied independently, and the dosage is also significantly reduced. It is because Polymeric Aluminium Chloride is a kind of inorganic polymer material electrolyte solution, in the whole process of slant plate sedimentation tank, the key effect is to reduce the floating particles of the surface potential difference, and then weaken the particles asked the anisotropic phase attraction, promote the particles in the whole process of impact agglomeration. Although polymerized aluminum chloride presents high value convergent positive ions immediately after the hydrolysis reaction, the cohesive force and the effect of bridging chain are still relatively weak. Flocculant is a kind of Organic Polymer Coagulant, this kind of linear polymer material coagulant has the effect of bridge chain, which can turn the particle cohesion group into the slant plate sedimentation tank body with enough foundation to settle.
