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
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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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