Method for regenerating mine filling wastewater

A mine filling and wastewater technology, applied in mining wastewater treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of high operating cost, need for evaporation and concentration, large investment, etc., and achieve the effect of low cost and easy operation.

Pending Publication Date: 2021-08-17
SHUI KOU SHAN NONFERROUS METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires evaporation and concentration, which consumes a lot of energy and has high operating costs.
[0007] If a variety of heavy metals and ammonia nitrogen are removed at the same time, simply add their respective treatment processes, not only the treatment process is long, the operation cycle is long, the investment is large, the operation cost is high, and the operation management is complicated
Patent CN201510026248.X provides a water treatment device and its treatment method for synergistically removing iron, manganese, ammonia nitrogen and organic matter in groundwater. Cannot effectively remove other heavy metal ions

Method used

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  • Method for regenerating mine filling wastewater
  • Method for regenerating mine filling wastewater
  • Method for regenerating mine filling wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Table 1 Mine filling wastewater composition (mg / L)

[0032]

[0033] Take 1000mL of mine filling wastewater into a beaker, add 0.1g of trichloroisocyanuric acid, potential +710mv, stir for 5 minutes, add lime 0.2g, adjust the pH of the solution to 10.24, stir for 10 minutes, then add 30% polyferric sulfate solution 0.5mL, adjust the pH of the solution to 6.46, stir and react for 10 minutes, add 0.1% polyacrylamide solution 0.5mL, reduce the stirring speed, stir for 3 minutes and let it settle, the supernatant is the regeneration solution, and the regeneration solution is tested analyze. From the analysis results of the regeneration fluid in Table 2, it can be seen that the regeneration method of mine filling wastewater has a good effect, and all indicators after treatment can reach the surface water quality standard of Class III, the process is simple, and the effect is superior.

[0034] Table 2 Analysis results of regeneration solution (mg / L)

[0035]

Embodiment 2

[0037] Table 3 Mine Filling Wastewater Components (mg / L)

[0038]

[0039] Take 1000mL of mine filling wastewater into a beaker, add 0.05g of sodium dichloroisocyanurate, the potential is +622mv, stir for 5 minutes, add caustic soda 0.2g, adjust the pH of the solution to 10.07, add 30% polymeric sulfuric acid after stirring for 10 minutes 0.4mL of iron solution, adjust the pH of the solution to 7.80, stir and react for 10 minutes, add 0.5mL of 0.1% polyacrylamide solution, reduce the stirring speed, let it settle after stirring for 5 minutes, the supernatant is the regeneration solution, and the regeneration solution Perform assay analysis. From the analysis results of the regeneration fluid in Table 4, it can be seen that the regeneration method of mine filling wastewater has a good effect, and all indicators after treatment can reach the surface water quality standard of Class III, the process is simple, and the effect is superior.

[0040] Table 4 Analysis results of re...

Embodiment 3

[0043] Table 5 Mine Filling Wastewater Components (mg / L)

[0044]

[0045]Take 1000mL of mine filling wastewater into a beaker, add 0.08g of sodium dichloroisocyanurate, potential +683mv, stir for 5 minutes, add lime 0.3g, adjust the pH of the solution to 10.33, stir for 10 minutes, then add 30% polyferric sulfate Solution 0.4mL, adjust the pH of the solution to 7.93, stir and react for 10 minutes, add 0.1% polyacrylamide solution 0.5mL, reduce the stirring speed, stir for 5 minutes and let it settle, the supernatant is the regeneration solution, and the regeneration solution is Laboratory analysis. From the analysis results of the regeneration fluid in Table 6, it can be seen that the regeneration method of mine filling wastewater has a good effect, and all indicators after treatment can reach the surface water quality standard of Class III. The process is simple and the effect is superior.

[0046] Table 6 Analysis results of regeneration solution (mg / L)

[0047]

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Abstract

The invention provides a method for regenerating mine filling wastewater. The method comprises the following steps: oxidizing: adding an oxidizing agent into the filling wastewater; hydrolysis: adding an alkaline agent into the oxidized filling wastewater; coagulation: adding a coagulant into the hydrolyzed filling wastewater; flocculation: adding a flocculating agent into the coagulated filling wastewater; and precipitating, standing the flocculated filling wastewater, and returning the bottom mud to a filling system to obtain a supernatant which is a regeneration liquid. Compared with the prior art, the method for regenerating the mine filling wastewater has the advantages that various heavy metals and ammonia nitrogen in the filling wastewater can be simultaneously removed, the process is simple, the operation cost is low, and the method is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for regenerating mine filling wastewater. Background technique [0002] The wet filling of underground mines at home and abroad is to mix tailings with cement, cement, etc. to make filling, and fill the filling with a certain concentration to the underground goaf, and the excess water in the filling will leak out. This is filling waste water. The filling wastewater contains a variety of heavy metals (Pb, Zn, Cd, Fe, Mn, Ni, Tl) and ammonia nitrogen, etc. If it is not treated, it will seep into the groundwater and cause harm to the environment. [0003] At present, the removal process for single pollution indicators of heavy metals and ammonia nitrogen is relatively mature, but there are few reports on the simultaneous removal of multiple heavy metals and ammonia nitrogen. The removal of lead, zinc, cadmium, and nickel in heavy metals generally uses sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/06C02F103/10C02F101/16C02F101/20
CPCC02F9/00C02F2101/20C02F2101/16C02F1/72C02F1/66C02F2209/06C02F1/5236C02F1/56C02F2001/007C02F2301/08C02F2103/10C02F2101/206
Inventor 付高明白成庆陈国兰付绸琳
Owner SHUI KOU SHAN NONFERROUS METALS LTD
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