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Method of using lithium-extracted waste residue to prepare polymerized aluminum calcium chloride water purifying agent

A technology for polyaluminum chloride and lithium waste residue extraction, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., and can solve problems such as air pollution, toxicity, and increase in the amount of coal-burning slag. , to achieve the effect of solving pollution, low production cost and realizing recycling

Active Publication Date: 2016-08-10
JIANGXI XULI MINING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the domestic demand of 150,000 tons of lithium carbonate in 2015, about 2.25 million tons of waste slag can be produced, which puts a lot of pressure on the land and the ecological environment. Aluminum nitride in the air will decompose ammonia gas after being damp in the air.

Method used

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  • Method of using lithium-extracted waste residue to prepare polymerized aluminum calcium chloride water purifying agent
  • Method of using lithium-extracted waste residue to prepare polymerized aluminum calcium chloride water purifying agent
  • Method of using lithium-extracted waste residue to prepare polymerized aluminum calcium chloride water purifying agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of above-mentioned polyaluminum calcium chloride water purifying agent, the method comprises the steps:

[0027] Continuous acid dissolution: mix lithium mica extraction waste slag with fly ash at a mass ratio of 1:1 and place it in a ball mill for mechanical activation, with particle size controlled to <100 μm, then industrial hydrochloric acid and metal elements in the mixed slag are mixed at a molar ratio of 1:1 , and placed in an acid-resistant reaction kettle with a condensing reflux device, heated and stirred at 90°C for 120 minutes, and filtered to obtain a mixed salt solution of calcium chloride and aluminum;

[0028] Alkalization reaction: The obtained aluminum calcium chloride solution is placed in a reactor, and after heating to 70°C, slowly add alkali solution according to 90% of the alkalization degree to promote alkalization reaction, and react for 60 minutes after adding the metered alkali solution completely.

[0029] The mixed sol...

Embodiment 2

[0032] The preparation method of above-mentioned polyaluminum calcium chloride water purifying agent, the method comprises the steps:

[0033] Continuous acid dissolution: mix lepidolite lithium extraction waste residue with fly ash at a mass ratio of 1.5:1 and place it in a ball mill for mechanical activation. The particle size is controlled to be less than 75 μm, and then industrial hydrochloric acid is mixed with metal elements in the mixed residue at a molar ratio of 1:1. , and placed in an acid-resistant reaction kettle with a condensing reflux device, heated and stirred at 80°C for 180 minutes, and filtered to obtain a mixed salt solution of calcium chloride and aluminum;

[0034] Alkalization reaction: The obtained aluminum calcium chloride solution is placed in a reactor, and after heating to 80°C, the alkali solution is slowly added according to 75% of the alkalization degree to promote the alkalization reaction, and the reaction is carried out for 90 minutes after the...

Embodiment 3

[0038] The preparation method of above-mentioned polyaluminum calcium chloride water purifying agent, the method comprises the steps:

[0039] Continuous acid dissolution: Mix lithium mica extraction waste slag and fly ash at a mass ratio of 2:1 and place it in a ball mill for mechanical activation, with particle size controlled to <75 μm, then industrial hydrochloric acid and metal elements in the mixed slag are mixed at a molar ratio of 1.2:1 , and placed in an acid-resistant reaction kettle with a condensing reflux device, heated and stirred at 100°C for 180 minutes, and filtered to obtain a mixed salt solution of calcium chloride and aluminum;

[0040]Alkalization reaction: The obtained aluminum calcium chloride solution is placed in a reactor, and after heating to 80°C, slowly add alkali solution according to 80% of the alkalization degree to promote alkalization reaction, and react for 90 minutes after adding the metered alkali solution completely.

[0041] The mixed sol...

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Abstract

The invention discloses a method of using lithium-extracted waste residue obtained after chlorination roasting of lithium mica to prepare a polymerized aluminum calcium chloride water purifying agent and belongs to the field of chemical industry. The method includes: using lithium-extracted waste residue, fly ash, industrial-grade hydrochloric acid, industrial caustic soda and water as main raw materials; preparing an aluminum calcium chloride solution through acid dissolution, sedimentation and separation; performing alkalization and curing to obtain the polymerized aluminum calcium chloride water purifying agent. The method is simple in process and low in production cost, and the polymerized aluminum calcium chloride water purifying agent has good water purifying effect, can be widely used in the field of industrial water, sewage treatment and papermaking and has the advantages of high water treatment capability, low consumption, little corrosiveness and good operation condition. By using the method, the pollution problem of lithium mica lithium-extracted waste residue is solved effectively, and double effects of environment protection and economical utilization are realized.

Description

technical field [0001] The product of the invention belongs to the field of chemical industry, and relates to a method for preparing polyaluminum calcium chloride water purifying agent from lithium extraction waste residue, in particular to a method for producing polyaluminum calcium chloride water purifying agent by using lepidolite lithium extraction waste residue as a main raw material. technical background [0002] Polyaluminum chloride is a widely used inorganic polymer flocculant. The largest industrial use is as a water treatment flocculant. It has good coagulation performance, large flocs, less dosage, high efficiency, fast sedimentation, Wide range and other advantages, compared with the traditional flocculant dosage can be reduced by 1 / 3 to 1 / 2, the cost can be saved by more than 40%, has become an excellent water purifier recognized by public health at home and abroad. It is mainly used for special water quality treatment of drinking water and water supply, such a...

Claims

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Application Information

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IPC IPC(8): C02F1/52
CPCC02F1/5245
Inventor 杨华晶王迎春刘华峰
Owner JIANGXI XULI MINING IND CO LTD