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Process for recovery of copper from arsenic-bearing and/or antimony-bearing copper sulphide concentrates

A copper sulfide and copper recovery technology, which is applied in the field of copper recovery from arsenic- and/or antimony-containing copper sulfide concentrates, can solve the problems of high cost and uneconomical recovery of copper.

Inactive Publication Date: 2017-02-22
TECK RESOURCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the almost complete degree of oxidation of the acid-forming sulfur (S) results in an expensive process that requires more neutralizers for the additional acid produced, and produces large amounts of residue that require specialized storage
[0014] Therefore, it is not economical to recover copper from copper concentrates containing sulphur-salts in each of the hydrometallurgical processes mentioned above

Method used

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  • Process for recovery of copper from arsenic-bearing and/or antimony-bearing copper sulphide concentrates
  • Process for recovery of copper from arsenic-bearing and/or antimony-bearing copper sulphide concentrates
  • Process for recovery of copper from arsenic-bearing and/or antimony-bearing copper sulphide concentrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0154] The following example demonstrates the benefit of fine grinding in the leaching of arsenite containing material during pressure oxidation in the presence of chlorides and surfactants. 34% copper, 12% iron, 36% sulfur, and 12% arsenic were leached by pressurized oxidation under the following conditions (~64% arsenite, 1% arsenite, 8% chalcopyrite, 21% pyrite mine):

[0155] Total pressure of 200 psi (1378 kPa);

[0156] Temperature 150 degrees Celsius;

[0157] The residence time is 60 minutes;

[0158] Using a feed solution comprising 12 grams per liter of chlorine, 8 grams per liter of free acid and 15 grams per liter of copper;

[0159] Surfactant added o-phenylenediamine (OPD) is 5 kg per ton.

[0160] The degree of grinding was varied as indicated in Table 2.

[0161] Table 2

[0162] Effect of Grind Size on Copper Extraction

[0163] Grind size, P80-micron Copper extraction concentration, % 23 64.2 17 82.6 15 80.2 11 85.7 ...

Embodiment 2

[0169] The following examples demonstrate that the use of surfactants does not result in adequate copper recovery in the absence of chlorides when leaching chalbyite containing material during a pressure oxidation process.

[0170] The same feed as in Example 1 was used and leached in the absence of chloride. 34% copper, 12% iron, 36% sulfur, and 12% arsenic were leached by pressurized oxidation under the following conditions (~64% arsenite, 1% arsenite, 8% chalcopyrite, 21% pyrite mine)

[0171] Total pressure of 200 psi (1378 kPa);

[0172] Temperature 150 degrees Celsius;

[0173] The residence time is 90 minutes;

[0174] Using a feed solution comprising 40 grams per liter of free acid and 12 grams per liter of copper;

[0175] Surfactant added o-phenylenediamine (OPD) is 5 kg per ton.

[0176] As shown in Table 3, in the absence of chloride, the surfactant use was varied according to the size of the fine grind.

[0177] table 3

[0178] Effect of fine grinding and ...

Embodiment 3

[0183] The following examples demonstrate that the presence of chlorides and surfactants improves leaching and overall copper recovery when leaching chalbysite containing material during pressure oxidation.

[0184] Additional tests were performed in the presence of 12 grams per liter of chloride in the feed solution. Raw material assays and examples for 34% copper, 12% iron, 36% sulfur and 12% arsenic (~64% chalcopyrite, 1% arsenite, 8% chalcopyrite, 21% pyrite) Same as described in 2. Leaching by pressure oxidation under the following conditions:

[0185] Total pressure of 200 psi (1378 kPa);

[0186] Temperature 150 degrees Celsius;

[0187] The residence time is 90 minutes;

[0188] Using a feed solution comprising 12 grams per liter of chlorine, 40 grams per liter of free acid and 12 grams per liter of copper;

[0189] Surfactant added o-phenylenediamine (OPD) is 5 kg per ton.

[0190] The presence of surfactants was varied as indicated in Table 4.

[0191] Table 4...

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Abstract

A process for the extraction of copper from a feed material comprising at least one of arsenic and antimony-bearing copper sulphide minerals is provided. The process includes fine-grinding the feed material and after fine-grinding, subjecting the feed material to pressure oxidation in the presence of surfactant and a halogen to produce a product slurry. The process also includes subjecting the product slurry to liquid / solid separation to obtain a pressure oxidation filtrate and solids comprising at least one of a compound of arsenic and a compound of antimony, and recovering copper from the pressure oxidation filtrate.

Description

technical field [0001] The invention discloses a hydrometallurgical treatment method for metal concentrates containing a large amount of copper-arsenic-sulfide minerals. Background technique [0002] As low-impurity copper concentrates become depleted and less readily available, there is greater focus on arsenic-containing copper ore bodies. This has resulted in increased arsenic levels in the average copper concentrate purchased by smelters. Arsenic levels are expected to rise to even higher levels over time. Due to the current limitations of arsenic abatement technologies, the upper limit for smelters' average arsenic levels in copper concentrates is rapidly being approached. [0003] Arsenic in some copper concentrates is present in arsenopyrite (FeAsS), where physical separation of arsenic from copper is possible. More typically, however, arsenic in copper sulphide concentrates is found primarily in the following minerals: [0004] Sollite Cu 3 AsS 4 [0005] Arse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B1/00C22B3/22C22B3/46C22B15/00
CPCC22B1/00C22B15/00C22B15/0004C22B15/0069C22B15/0067Y02P10/20C22B3/26C22B15/0071C22B1/11C22B1/005C22B15/0084C22B3/08C22B30/02C22B30/04C22B3/06
Inventor 亨利·萨洛蒙-德-弗里德伯格H·M·蒋
Owner TECK RESOURCES
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