Production process of copper sulfate from copper sulfide ore

A production process, a technology for copper sulfide ore, applied in the direction of copper sulfate, process efficiency improvement, etc., can solve the problems of difficult product purity affecting the copper sulfate production process, increase equipment and production costs, and reduce the total yield of copper sulfate, etc., To achieve the effect of shortening the roasting residence time, reducing the production cost and reducing the burden

Inactive Publication Date: 2002-09-25
XINTAI COPPER IND LAIWU IRON & STEEL GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of various additives not only increases the production cost, but also increases the impurities in the leaching solution, and affects the difficulty of the subsequent production process of copper sulfate and the purity of the product
Especially the secondary crystallization mother liquor produced by copper sulfate,...

Method used

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  • Production process of copper sulfate from copper sulfide ore
  • Production process of copper sulfate from copper sulfide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0028] Example 4: Take 1000g of calcine containing 19.80% copper, control the liquid-to-solid ratio to 1.2:1, leaching at 80-90℃ for 60 minutes with stirring, the final acid concentration is controlled below 20g / L, and the copper leaching rate is 98.10% 778 g of copper sulfate crystals were precipitated from the leachate, and the recovery rate was 96.07%.

Embodiment 5

[0029] In Example 5, 1000 g of calcine containing 23.78% copper was taken, the liquid-solid ratio was controlled to 1.5:1, and the leaching was stirred at 80-90°C for 60 minutes, the final acid concentration was controlled below 15g / L, and the copper leaching rate was 98.21% 934g copper sulfate crystals were deposited from the leachate, with a recovery rate of 96.03%.

[0030] 3. Examples 6, 7, and 8 are examples of secondary mother liquor extraction and purification treatment.

Embodiment 6

[0031] In Example 6, the secondary mother liquor was extracted and treated with 5-nonylsalicylaldoxime.

[0032] Take 1 liter of the second mother liquor, adjust the mother liquor to contain Cu ++ 12g / L, P H It is 1.8, 15% extractant kerosene solution is added, and the extraction ratio is controlled to 1.5:1 for three-stage countercurrent extraction. The organic phase containing copper is subjected to secondary stripping with 180g / L dilute sulfuric acid, and the control ratio is 2.5:1. The stripping liquid contains 50g / L copper, and the raffinate contains less than 0.2g / L copper. The recovery rate was 98.16%.

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Abstract

The present invention relates to a process of producing copper sulfate from copper sulfide ore. In one Lurgi boiling bed roaster, copper sulfide ore powder is roasted at 660-710 deg.c into roasted sand copper with acid dissolving rate of 98 % and water dissolving rate of 60-70 % and the exhausted SO2 is used directly in preparing acid. Roasted sand copper is made to mix with dilute copper sulfatesolution returned from extraction step and sulfuric acid is added to regulate liquid-to-solid ratio of 1-2 and ultimate H2SO4 concentration lower than 20 g/L. The copper leaching rate is greater than98%. The crystallized secondary mother liquid is extracted and purified to recover copper sulfate. The extracting liquid is back extracted with dilute sulfuric acid, the back extracting liquid is returned to leaching step and the organic phase containing extractant is returned to secondary mother liquid.

Description

Technical field [0001] The present invention is related to the production technology of copper sulfate, more specifically, it relates to the improvement of the production technology of preparing copper sulfate from copper sulfide ore. Background technique [0002] In the production of copper sulfate in the prior art, one type uses some copper scraps as raw materials to prepare copper sulfate. CN1067454A, CN1127221A and other patents also disclose the direct preparation of copper sulfate from copper ore. The CN1079207A patent reports the production technology of copper sulphate produced from copper sulfide. The CN1079207A patent is to add sulfate, nitrate, carbonate and other inorganic salts to copper sulfide ore, and then make calcine copper by roasting, and then make copper sulfate by leaching. [0003] In the above-mentioned production process, iron powder, nitric acid, nitrite and other oxidants are added to the leaching solution to eliminate the iron in the leaching solution,...

Claims

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Application Information

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IPC IPC(8): C01G3/10C22B3/08C22B3/26
CPCY02P10/20
Inventor 高德军
Owner XINTAI COPPER IND LAIWU IRON & STEEL GRP
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