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Method and device for removing calcium and magnesium from indium-precipitated liquid in zinc smelting

A technology of liquid and zinc smelting after sinking indium, which is applied in the field of metallurgy, can solve the problems of increasing the solubility of magnesium and not being able to remove magnesium, and achieve the effect of large processing capacity

Active Publication Date: 2019-02-12
YUNNAN HUALIAN ZINC & INDIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calcium concentration is still high, and at the same time, the solubility of magnesium is increased, which cannot achieve the purpose of removing magnesium.

Method used

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  • Method and device for removing calcium and magnesium from indium-precipitated liquid in zinc smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Take 100L of indium immersion liquid, the concentration of calcium in the indium immersion liquid is 560 mg / L, the concentration of magnesium is 22.5 g / L, and the pH is 4.0-4.5. Add calcium sulfate anhydrous crystal seed and magnesium sulfate monohydrate crystal seed in the liquid after this indium sinking, the addition of this calcium sulfate anhydrous crystal seed is 1g / L, the addition of this magnesium sulfate monohydrate crystal seed is 1g / L L.

[0054] Preheat the indium-precipitated solution to 90°C, pump it into a vertical autoclave through a booster pump, continue heating to 185°C, react for 3 hours, and clarify it through a flash tank and a thickener to obtain a supernatant. The concentration of calcium in the supernatant was 57 mg / L, and the concentration of magnesium was 8.0 g / L.

Embodiment 2

[0056] Take 100L indium immersion liquid, the concentration of calcium in the indium immersion liquid is 560 mg / L, the concentration of magnesium is 25 g / L, and the pH is 4.0-4.5. Add anhydrous calcium sulfate seed crystals and magnesium sulfate monohydrate crystal seeds to the liquid after indium precipitation, the addition amount of this anhydrous calcium sulfate crystal seeds crystals is 0.5g / L, the addition amount of this magnesium sulfate monohydrate crystal seeds crystals is 0.5g / L g / L.

[0057] Preheat the indium-precipitated liquid to 80°C, pump it into a vertical autoclave through a booster pump, continue heating to 130°C, and react for 5 hours to clarify it through a flash tank and a thickener to obtain a supernatant. The concentration of calcium in the supernatant was 43 mg / L, and the concentration of magnesium was 6.7 g / L.

Embodiment 3

[0059] Take 100L indium immersion liquid, the concentration of calcium in the indium immersion liquid is 560 mg / L, the concentration of magnesium is 30 g / L, and the pH is 4.0-4.5. Add anhydrous calcium sulfate seed crystals and magnesium sulfate monohydrate crystal seeds in the liquid after this indium precipitation, the addition amount of this anhydrous calcium sulfate crystal seeds crystals is 1.5g / L, the addition amount of this magnesium sulfate monohydrate crystal seeds crystals is 1.5g / L g / L.

[0060] Preheat the indium-precipitated solution to 70°C, pump it into a vertical autoclave through a booster pump, continue heating to 150°C, react for 2 hours, and clarify it through a flash tank and a thickener to obtain a supernatant. The concentration of calcium in the supernatant was 61 mg / L, and the concentration of magnesium was 7.3 g / L.

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Abstract

The invention discloses a method and an apparatus for removing calcium and magnesium from solution after indium precipitation in zinc smelting. The method comprises the following steps: adding an anhydrous calcium sulfate seed crystal and a magnesium sulfate monohydrate seed crystal; and under the condition of 120 to 200 DEG C, removing iron in the solution after indium precipitation by using a hematite iron removal method, and crystallizing the calcium and magnesium in the solution after indium precipitation, so as to obtain a solution with iron, calcium and magnesium removed, wherein the calcium in the solution after the indium precipitation is crystallized in the form of anhydrous calcium sulfate, and the magnesium in the solution after indium precipitation is crystallized in the form magnesium sulfate monohydrate. The method for removing calcium and magnesium from solution after indium precipitation in zinc smelting according to the embodiment can effectively remove the calcium and magnesium in the solution after indium precipitation.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for removing calcium and magnesium from the indium-precipitated liquid of zinc smelting and a device for removing calcium and magnesium from the indium-precipitated liquid of zinc smelting. Background technique [0002] In the zinc hydrometallurgy process, impurity removal is a necessary process, and calcium and magnesium impurities are more difficult to remove because of their special nature. [0003] In the existing zinc hydrometallurgy process, the zinc sulfide concentrate is roasted in a fluidized fluidized furnace to obtain zinc calcine, and calcium and magnesium exist in the zinc calcine as oxides. When the zinc calcine is leached, calcium and magnesium enter the neutral leaching solution, and the The neutral leaching solution is purified by zinc powder replacement and impurity removal process to obtain the purified solution. The temperature of the purified liquid is usu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/20C22B3/02C22B19/00
CPCC22B3/02C22B3/20C22B19/00Y02P10/20
Inventor 王私富姚应雄朱北平尹华光李彪王邦伟周大国李云陈先友赵燕飞张庆丰
Owner YUNNAN HUALIAN ZINC & INDIUM