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Method for producing polyaluminum calcium chloride by using electrolytic manganese residues

A technology of calcium polyaluminum chloride and electrolytic manganese slag, applied in aluminum chloride, aluminum halide and other directions, can solve the problems of secondary pollution, waste of resources, complex composition of electrolytic manganese slag, etc. Effect

Active Publication Date: 2018-08-24
TONGREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is little research on the industrial utilization of calcium-aluminum elements with relatively low value and high content. Due to the complex composition of electrolytic manganese slag, if only one or two elements are used, it will inevitably lead to waste of resources and secondary pollution. question

Method used

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  • Method for producing polyaluminum calcium chloride by using electrolytic manganese residues
  • Method for producing polyaluminum calcium chloride by using electrolytic manganese residues
  • Method for producing polyaluminum calcium chloride by using electrolytic manganese residues

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Embodiment 1

[0020] A method for producing polyaluminum calcium chloride by electrolysis of manganese slag, comprising the steps of:

[0021] (1) 100kg electrolytic manganese slag is crushed to 115 mesh;

[0022] (2) Mix the pulverized electrolytic manganese slag and decomposing agent according to the ratio of 5L decomposing agent per kg electrolytic manganese slag, and react at 75°C for 1.75 hours. The decomposing agent is a mixture obtained by mixing hydrochloric acid and nitric acid in equal weight ratios, Its mass fraction is 20%;

[0023] (3) performing solid-liquid separation on the reacted mixture to obtain solid a and liquid a;

[0024] (4) According to the proportion of liquid a corresponding to 50L per kg of regulator, add regulator to liquid a, react at 65°C for 2.25 hours, and the regulator is formed by mixing calcium oxide and aluminum oxide in an equal weight ratio;

[0025] (5) Separating the reacted mixture from solid to liquid to obtain liquid b and solid b, and drying t...

Embodiment 2

[0027] A method for producing polyaluminum calcium chloride by electrolysis of manganese slag, comprising the steps of:

[0028] (1) 100kg electrolytic manganese slag is crushed to 30 orders;

[0029] (2) Mix the pulverized electrolytic manganese slag and decomposing agent according to the ratio of 1 L decomposing agent per kg electrolytic manganese slag, and react at 30° C. for 0.5 hour. The decomposing agent is hydrochloric acid, and its mass fraction is 5%;

[0030] (3) performing solid-liquid separation on the reacted mixture to obtain solid a and liquid a;

[0031] (4) Add a regulator to liquid a at a ratio of 1 L of liquid a per kg of regulator, and react at 30° C. for 0.5 hour, and the regulator is calcium hydroxide;

[0032] (5) Separating the reacted mixture from solid to liquid to obtain liquid b and solid b, and drying the solid b to obtain the finished polyaluminum calcium chloride product.

Embodiment 3

[0034] A method for producing polyaluminum calcium chloride by electrolysis of manganese slag, comprising the steps of:

[0035] (1) 100kg electrolytic manganese slag is crushed to 200 mesh;

[0036] (2) Mix the pulverized electrolytic manganese slag with the decomposition agent at a ratio of 9L of decomposition agent per kg electrolytic manganese slag, and react at 120°C for 3 hours. The decomposition agent is a mixture of hydrochloric acid and nitric acid with a mass fraction of 35 %;

[0037] (3) performing solid-liquid separation on the reacted mixture to obtain solid a and liquid a;

[0038] (4) According to the ratio of liquid a corresponding to 100L per kg of regulator, add regulator to liquid a, react at 100°C for 4 hours, and the regulator is aluminum carbonate;

[0039] (5) Separating the reacted mixture from solid to liquid to obtain liquid b and solid b, and drying the solid b to obtain the finished polyaluminum calcium chloride product.

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Abstract

The invention relates to the technical field of industrial solid waste utilization, in particular to a method for producing polyaluminum calcium chloride by using electrolytic manganese residues. Themethod disclosed by the invention is characterized in that the electrolytic manganese residues are decomposed by adopting a chemical method; resources such as calcium and aluminum in the electrolyticmanganese residues are respectively extracted through the steps of decomposition, dissolution, neutralization and the like; the extraction rate of the polyaluminum calcium chloride is improved by adding a modifier, and the separation effect of aluminum calcium elements and iron and manganese elements is improved. The method disclosed by the invention can effectively extract the calcium and aluminum elements in the electrolytic manganese residues, and the calcium and aluminum elements are used for producing the polyaluminum calcium chloride; the process is simple and no three wastes are discharged, so that a foundation is laid for industrial comprehensive utilization of the electrolytic manganese residues; besides, the method disclosed by the invention conforms to the recycling economy principle of harmlessness, reduction and recycling, and enables low-priced elements such as the calcium and the aluminum in the electrolytic manganese residues to be comprehensively utilized.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste utilization, in particular to a method for producing polyaluminum calcium chloride by electrolyzing manganese slag. Background technique [0002] Electrolytic manganese slag is the acid leaching residue produced by manganese carbonate ore after acidolysis, neutralization, pressure filtration and impurity removal. It is mainly composed of dihydrate gypsum phase, aluminum hydroxide, quartz phase and mullite, alumina and The specific gravity of calcium oxide accounts for 30-50% of the weight of electrolytic manganese slag. The accumulation of a large amount of manganese slag will not only occupy a large amount of land resources, but also contain excessive ammonia nitrogen, sulfate, and heavy metal ions such as chromium, nickel, copper, and manganese that exceed the national environmental protection discharge standards, which will pollute the surrounding soil. And with rainwater flowin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56
CPCC01F7/56
Inventor 杨晓红薛希仕向欣常军李修刚
Owner TONGREN UNIV