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Method for harmless treatment of barium slag and synchronous recovery of barium carbonate

A barium carbonate and barium slag technology, applied in barium carbonate, calcium carbonate/strontium/barium, grain processing and other directions, can solve the problems of uneven mixing of materials, waste of resources, poor pertinence, etc., to improve the mixing uniformity and reduce the environment. Pollution, targeted effects

Active Publication Date: 2022-04-22
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The barium-containing waste slag produced after dephosphorizing high-phosphorus molten iron with barium-based slag system is mainly composed of Ba 3 (PO4) 2 , and some BaO, BaF 2 etc. These barium series compounds are unstable and easily infiltrate into groundwater. During the stacking process, they are basically the same as the barium-containing waste residue produced by producing barium salts. solve the above problems
[0005] In the prior art, when treating the barium-containing waste slag produced after the dephosphorization of high-phosphorus molten iron, the corresponding addition method was not selected according to the difference between the liquid-liquid reaction and the solid-liquid reaction, which was poorly targeted, resulting in poor mixing of materials. Even, the reaction is not complete, thereby reducing the treatment efficiency of barium slag, and at the same time, the barium carbonate produced after the reaction is not recovered, resulting in waste of resources

Method used

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  • Method for harmless treatment of barium slag and synchronous recovery of barium carbonate
  • Method for harmless treatment of barium slag and synchronous recovery of barium carbonate
  • Method for harmless treatment of barium slag and synchronous recovery of barium carbonate

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Embodiment 1

[0031] A method for making barium slag harmless and synchronously recovering barium carbonate, said barium slag is the barium-containing waste slag produced after dephosphorizing high-phosphorus molten iron using barium-based slag system, and its main component is Ba 3 (PO 4 ) 2 and soluble barium salts, comprising the steps of:

[0032] S1, put the barium-containing waste slag into a grinder, grind and sieve to obtain a barium slag fine powder with a mesh number of 80, fully dissolve the barium slag fine powder in water to obtain a soluble barium salt solution and Ba 3 (PO 4 ) 2 Precipitated mixed slurry;

[0033] S2, after separating the soluble barium salt solution in the above mixed slurry, take 3.5g soluble barium salt solution and mix it with 15ml dilute hydrochloric acid solution, and after ultrasonic vibration treatment for 30min at a temperature of 35°C, barium chloride solution A is obtained, and then , will (NH 4 ) 2 CO 3 Dissolve in deionized water and prep...

Embodiment 2

[0037] A method for making barium slag harmless and synchronously recovering barium carbonate, said barium slag is the barium-containing waste slag produced after dephosphorizing high-phosphorus molten iron using barium-based slag system, and its main component is Ba 3 (PO 4 ) 2 and soluble barium salts, comprising the steps of:

[0038] S1. Put the barium-containing waste slag into a grinder, grind and sieve to obtain a barium slag fine powder with a mesh number of 90, fully dissolve the barium slag fine powder in water to obtain a soluble barium salt solution and Ba 3 (PO 4 ) 2 Precipitated mixed slurry;

[0039] S2, after separating the soluble barium salt solution in the above-mentioned mixed slurry, take 3.5g soluble barium salt solution and mix with 15ml dilute hydrochloric acid solution, after ultrasonic vibration treatment under the temperature condition of 40 ℃ for 30min, obtain barium chloride solution A, then , will (NH 4 ) 2 CO 3 Dissolve in deionized water...

Embodiment 3

[0043] A method for making barium slag harmless and synchronously recovering barium carbonate, said barium slag is the barium-containing waste slag produced after dephosphorizing high-phosphorus molten iron using barium-based slag system, and its main component is Ba 3 (PO 4 ) 2 and soluble barium salts, comprising the steps of:

[0044] S1. Put the barium-containing waste slag into a grinder, grind and sieve to obtain a barium slag fine powder with a mesh number of 100, and fully dissolve the barium slag fine powder in water to obtain a soluble barium salt solution and Ba 3 (PO 4 ) 2 Precipitated mixed slurry;

[0045] S2, after separating the soluble barium salt solution in the above-mentioned mixed slurry, take 3.5g soluble barium salt solution and mix with 15ml dilute hydrochloric acid solution, after ultrasonic vibration treatment under the temperature condition of 45 ℃ for 30min, obtain barium chloride solution A, then , will (NH 4 ) 2 CO 3 Dissolve in deionized ...

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Abstract

The invention provides a method for harmlessly treating barium slag and synchronously recovering barium carbonate, and belongs to the technical field of solid waste treatment. The barium slag is barium-containing waste residues generated after dephosphorization is conducted on the high-phosphorus molten iron through a barium-based slag system, the main components of the barium slag are Ba3 (PO4) 2 and soluble barium salt, after the barium-containing waste residues generated after dephosphorization is conducted on the high-phosphorus molten iron are subjected to harmless treatment, barium carbonate precipitates are recycled, the toxicity of the barium-containing waste residues can be greatly reduced, and the production cost is reduced. According to the present invention, the process is simple, the environmental pollution is reduced, the processes are respectively optimized according to the different adding modes of the liquid-liquid reaction and the solid-liquid reaction during the treatment process, the pertinence is strong, the mixing uniformity of different reactants can be furthest improved, the maximum recovery of barium carbonate is easily achieved, and the advantages of energy saving and emission reduction are provided.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, in particular to a method for making barium slag harmless and synchronously recovering barium carbonate. Background technique [0002] Industrial solid waste refers to the solid waste generated in industrial production activities. It is various waste residues, dust and other wastes discharged into the environment during the industrial production process. Barium slag is a common industrial solid waste. [0003] A certain amount of barium-containing waste slag will be produced when smelting stainless steel and other new steel types in the metallurgical industry, which is one of the hazardous solid wastes produced in industrial production. After oxidative dephosphorization of barium-containing slag, a large amount of barium-containing waste slag is produced and piled up in the open air , resulting in soluble barium salts with great toxicity being leached by rainwater and infiltrated in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B02C21/00B02C13/14B02C13/02B02C23/10B02C13/28
CPCC01F11/188B02C21/00B02C13/14B02C13/02B02C23/10B02C13/28B02C2201/06Y02P10/20
Inventor 杜建伟张文超黄凯华温勇贺框李彦希胡小英田雨徐晓玲
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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