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A method for preparing high-purity barium salt by utilizing witherite-bariumite industrial waste residue

A kind of technology of industrial waste residue and barium calcite

Inactive Publication Date: 2017-04-12
CHONGQING CHUANYU MINING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some existing technologies can use barium slag as raw material to realize the preparation of barium salt, such as the application number 201110463000.1, the Chinese invention patent application titled "Method for preparing barium chloride with barium slag from witherite tailings" It is disclosed that the barium chloride product can be obtained by grinding the barium slag of the witherite tailings through the steps of grinding-acidolysis leaching-filtration-removing impurities, but its leaching process, impurity removal process and purification process are relatively simple, but ethanol is used Solvents are expensive; for example, in the impurity removal process, only oxalic acid is used, but it cannot effectively remove impurities such as strontium, calcium, and iron contained in the tailings barium slag, but will introduce impurities, which will make The prepared barium chloride has low purity and is not practical in industry
Therefore, this technology cannot realize the efficient recovery and treatment of barium

Method used

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  • A method for preparing high-purity barium salt by utilizing witherite-bariumite industrial waste residue
  • A method for preparing high-purity barium salt by utilizing witherite-bariumite industrial waste residue

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Embodiment 1

[0037] Firstly, dry the witherite-bariumite industrial waste residue with a grade of 60% (degrees) until the water content is below 0.5%, then crush and grind the waste residue, and obtain -100 mesh slag powder after sieving; In an enamel reaction kettle with a stirrer and induced draft fan, add 300 kg of tap water, start the mixer, and slowly add 1 ton of -100 mesh slag powder to mix. Turn on the induced draft fan, add hydrochloric acid with a concentration of 30% according to the liquid-solid ratio of 1.0, and stir at a temperature of 40°C for 5 minutes to carry out acidolysis. And control the pH of the leaching end point in the range of 2.5-4.0; filter and separate the residue, add 10 kg of hydrogen peroxide to the obtained filtrate, wherein the mass fraction of hydrogen peroxide is 27.5%, stir for 10 minutes, and then slowly add a pH regulator until the pH value Adjust to 8.0, heat up to 70-80°C, add 4 kg of activated carbon, and boil for 7 minutes; then filter, and the re...

Embodiment 2

[0039] Firstly, dry the witherite-bariumite industrial waste residue with a grade of 60% (degrees) until the water content is below 0.5%, then crush and grind the waste residue, and obtain -100 mesh slag powder after sieving; In an enamel reaction kettle with a stirrer and induced draft fan, add 300 kg of tap water, start the mixer, and slowly add 1 ton of -100 mesh slag powder to mix. Turn on the induced draft fan, add hydrochloric acid with a concentration of 30% according to the liquid-solid ratio of 1.2, and stir at a temperature of 40°C for 5 minutes to carry out acidolysis. And control the pH of the leaching end point in the range of 2.5-4.0; filter and separate the residue, add 10 kg of hydrogen peroxide to the obtained filtrate, wherein the mass fraction of hydrogen peroxide is 27.5%, stir for 10 minutes, and then slowly add a pH regulator until the pH value Adjust to 8.0, heat up to 70-80°C, add 3 kg of activated carbon, and boil for 7 minutes; then filter, and the re...

Embodiment 3

[0041]Firstly, dry the witherite-bariumite industrial waste residue with a grade of 60% (degrees) until the water content is below 0.5%, then crush and grind the waste residue, and obtain -100 mesh slag powder after sieving; In an enamel reaction kettle with a stirrer and induced draft fan, add 300 kg of tap water, start the mixer, and slowly add 1 ton of -100 mesh slag powder to mix. Turn on the induced draft fan, add hydrochloric acid with a concentration of 25% according to the liquid-solid ratio of 1.2, and stir at a temperature of 30°C for 10 minutes to carry out acidolysis. And control the pH of the leaching end point in the range of 2.5-4.0; filter and separate the residue, add 30 kg of hydrogen peroxide to the obtained filtrate, wherein the mass fraction of hydrogen peroxide is 27.5%, stir for 8 minutes, and then slowly add a pH regulator until the pH value Adjust to 8.0, heat up to 70 ° C, add 3.5 kilograms of gac, and boil to a slight boil for 4 minutes; filter again...

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Abstract

The invention discloses a method for preparing high-purity barium salt by using witherite-barytocalcite industrial waste residues. The method comprises a crushing and grinding procedure, an acid hydrolysis and leaching procedure, an impurity removal and purification procedure, an evaporation, concentration and crystallization procedure, a coarse washing procedure, a fine washing procedure and a drying, testing and packaging procedure. The barium salt with the high product purity and the low impurity content can be prepared with the method, and barium can be recovered efficiently. Meanwhile, high-temperature operation is not required by the whole-wet technology adopted in the method, reaction conditions are mild, the energy consumption is low, three-waste emission is low, thus, clean production and comprehensive utilization in the witherite-barytocalcite industrial waste residue deep-processing field can be further realized, and the economic benefit and the environmental benefit are significant.

Description

technical field [0001] The invention relates to the field of fine chemical industry of inorganic salts, and more specifically relates to a method for preparing high-purity barium salts by utilizing witherite-bariumite industrial waste residue. Background technique [0002] Witherite-barite type barium ore is a rare barium resource in the world. Its main useful components are witherite and barite, and there are also a small amount of barium dolomite, barite and barite. At present, my country's development and utilization of witherite-bariumite-type barium ore is mainly used to produce barium series inorganic chemical products such as: barium octahydrate, barium monohydrate, barium nitrate, barium chloride, barium carbonate, barium sulfate, etc. . Among them, in the process of producing Bashuiba by calcination method, due to the limitation of process and equipment, more than 1.5-2 tons of waste residue will be produced for every ton of Bashuiba produced, and the actual convers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/24B09B3/00
Inventor 伍先俊漆勇
Owner CHONGQING CHUANYU MINING IND CO LTD
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