Method for wet separation and recovery of valuable metal from Kaldo furnace smelting slag

A wet separation, valuable metal technology, applied in the directions of non-metallic elements, chemical instruments and methods, process efficiency improvement, etc., can solve the problems affecting the copper smelting system and copper electrolysis system, the large amount of smelting slag, and the lack of consideration of antimony and bismuth. The recovery of selenium and tellurium, etc., achieves the effect of good compatibility, high enrichment, and avoiding adverse effects

Active Publication Date: 2016-11-09
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The small amount of blowing slag and refining slag returned to the Kaldor furnace will not bring adverse effects, but the amount of smelting slag is large and contains a large amount of copper, gold, silver, antimony, bismuth, tellurium, selenium, tin and other non-ferrous metals and rare precious metals. This brings two unfavorable factors: the one, a large amount of smelting slag returns copper smelting system and can cause lead to form vicious cycle in large system, influences copper smelting system and copper electrolysis system, and seriously affects the quality of anode copper and cathode copper; The copper smelting system can only r

Method used

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  • Method for wet separation and recovery of valuable metal from Kaldo furnace smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for wet separation and recovery of valuable metals in Kaldor furnace smelting slag, carried out according to the following steps:

[0022] (1) Sampling and crushing

[0023] A total of 8 kg of Kaldor furnace smelting slag was used in the comprehensive workshop of Baiyin Nonferrous Group Company to carry out a small test. All the Kaldor furnace smelting slag samples were crushed into small particles with a particle size of 0-5 mm for use. The raw material composition and content of Kaldor furnace smelting slag are: Pb 28.89%; S 3.58%; Na 10.48%; Ba 7.20%; Cu 12.39%; Sb 10.18%; Bi 6.47%; Ag4.82%; As 1.71%; Si 1.57%; Ca 0.72%; Mg 0.78%; Sn 1.14%; K 0.57%; Fe 1.55%; Cl 0.45%; Al 0.26%; Te 0.20%; Se 0.32%; Ni 0.29%.

[0024] (2) Grinding and water leaching desalination

[0025] Weigh 500g of the crushed sample and put it into a ball mill, add 500g of water, and grind for 10 minutes. At this time, the mineral fineness is -200 mesh and 95%, then rinse with 500g of w...

Embodiment 2

[0035] (1) The smelting slag from Kaldor furnace in the comprehensive workshop of Baiyin Nonferrous Metals Group Co., Ltd. was used to carry out a small test.

[0036] (2) Weigh 150g of the crushed sample and put it into a ball mill, add 150g of water, and grind for 10 minutes. At this time, the mineral fineness is 98% at -200 mesh.

[0037] (3) Decopper removal by pressure acid leaching

[0038]Weigh 100g of the ground desalted material and put it into a 1L small autoclave, add 400g of water and 20g of concentrated sulfuric acid with a mass fraction of 98%. Heating was stopped, and a certain pressure was controlled at this time, and nitrogen was removed by releasing partial pressure in the kettle. Then close the valve and feed oxygen into the autoclave for 5 hours. After the pressure in the autoclave reaches 12MPa and the temperature in the autoclave reaches 180°C, cool it down. , filtered, and washed with water to obtain copper-removing slag and copper-removing solution. ...

Embodiment 3

[0046] (1) The smelting slag from Kaldor furnace in the comprehensive workshop of Baiyin Nonferrous Metals Group Co., Ltd. was used to carry out a small test.

[0047] (2) Weigh 150g of the crushed sample and put it into a ball mill, add 150g of water, and grind for 10 minutes. At this time, the mineral fineness is 98% at -200 mesh.

[0048] (3) Decopper removal by pressure acid leaching

[0049] Weigh 100g of the ground desalted material and put it into a 1L small autoclave, add 400g of water, and 50g of concentrated sulfuric acid with a mass fraction of 98%. Heating was stopped, and a certain pressure was controlled at this time, and nitrogen was removed by releasing partial pressure in the kettle. Then close the valve and feed oxygen into the autoclave for 6 hours. After the pressure in the autoclave reaches 10MPa and the temperature in the autoclave reaches 180°C, cool down. After the pressure leaching operation is completed, the temperature of the feed liquid is reduced ...

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Abstract

The invention discloses a method for wet separation and recovery of valuable metal from Kaldo furnace smelting slag. Kaldo furnace smelting slag is ground and dipped in water to remove soluble salt; copper, selenium and tellurium in the slag are leached out by using pressurization, oxidation and acid leaching for treatment to obtain copper sulfate solution, silver-selenium slag and copper telluride slag; tellurium, silver and selenium can be respectively recovered from the silver-selenium slag and the copper telluride slag; pressurized copper removing filter residue is mixed with hydrochloric acid for leaching out antimony and bismuth to finally obtain lead-silver slag capable of returning to a Kaldo furnace for smelting; and antimony and bismuth are further recovered from antimony-bismuth solution. According to the method, a mode of stepped removal and recovery of such metal as copper, antimony, bismuth, selenium, tellurium, silver and lead enriched in the Kaldo furnace smelting slag is adopted, compatibility of the method with a wet-fire combined flow for recovering rare and noble metal from Kaldo furnace treatment copper anode mud is excellent, the smelting slag is enabled to return to the Kaldo furnace for smelting so as to prevent adverse effects on the copper smelting by returning to a copper smelting system, and the lead-silver slag with higher enriching degree of such valuable metal as lead and silver is obtained.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgical engineering, and in particular relates to a method for wet separation and recovery of valuable metals in smelting slag of a Kaldor furnace. Background technique [0002] Kaldor furnace smelting generally produces three types of slag: smelting slag, blowing slag and refining slag. At present, the processing method of Kaldor slag at home and abroad is to return the blowing slag and refining slag to the Kaldor furnace for processing, and return the smelting slag to copper Smelting main system processing. The small amount of blowing slag and refining slag returned to the Kaldor furnace will not bring adverse effects, but the amount of smelting slag is large and contains a large amount of copper, gold, silver, antimony, bismuth, tellurium, selenium, tin and other non-ferrous metals and rare precious metals. This brings two unfavorable factors: the one, a large amount of smelting slag return...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00C22B11/00C22B13/00C22B30/06C22B30/02C01B19/00
CPCC01B19/00C22B7/007C22B7/04C22B11/044C22B13/045C22B15/0071C22B30/02C22B30/06Y02P10/20
Inventor 王永斌王怡霖黄建芬王军辉吉鸿安栗威
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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