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Process for recovering sulfur, lead, zinc and silver from oxygen-enriched directly leached residues of zinc concentrates or lead-zinc mixed ores

A technology for mixing ore and zinc concentrate, applied in the field of silver, zinc, sulfur and lead recovery, can solve the problems of high energy consumption, sulfuric acid pollution, difficult extraction of valuable metals, etc., and achieve high product quality and recovery rate. High, realize the effect of comprehensive utilization

Active Publication Date: 2014-12-10
株洲起源科技有限责任公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention designs a process for recovering sulfur, lead, zinc and silver from zinc concentrate or lead-zinc mixed ore oxygen-enriched direct leaching slag, which can efficiently, comprehensively and economically solve the problems of high energy consumption, Complicated problems such as sulfuric acid pollution and difficult extraction of various valuable metals have good economic and environmental benefits

Method used

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  • Process for recovering sulfur, lead, zinc and silver from oxygen-enriched directly leached residues of zinc concentrates or lead-zinc mixed ores
  • Process for recovering sulfur, lead, zinc and silver from oxygen-enriched directly leached residues of zinc concentrates or lead-zinc mixed ores
  • Process for recovering sulfur, lead, zinc and silver from oxygen-enriched directly leached residues of zinc concentrates or lead-zinc mixed ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] Composition of sulfur slag (processed through 100 mesh sieve, dry basis): lead 1.22%, zinc 4.75%, indium 0.0029%, silver 0.0569%, sulfur 74.83%.

[0026] Weigh 5.0000g of sulfur residue, 1.0000g of A# additive, 62.5ml (100g) of tetrachlorethylene, heat in a water bath at 100°C for 30min, filter immediately to obtain 3.2126g of residue, cool to 27.5°C to obtain 1.8410g of sulfur A, continue to cool to At 9°C, 0.3033 g of sulfur B was obtained. The washed filter residue is directly returned to the lead system to recover lead and silver, and the recovery rates of lead, silver, indium and zinc are 110%, 34%, 89% and 113% respectively.

[0027]

Embodiment approach 2

[0029] Composition of sulfur slag (processed through 100 mesh sieve, dry basis): lead 1.22%, zinc 4.75%, indium 0.0029%, silver 0.0569%, sulfur 74.83%.

[0030] Weigh 10.0000 g of the processed sample sulfur residue, 2.0000 g of A# additive, 125 ml of a mixture of tetrachlorethylene and toluene, heat in a water bath at 100 ° C for 25 min, filter immediately to obtain 6.3962 g of residue, cool to 27.5 ° C, and obtain 3.6703 g of sulfur A, Continue cooling down to 9°C to obtain 0.6098 g of sulfur B. First add the washed filter residue to a jacketed heating device with a mixed solution of dilute sulfuric acid and nitric acid in advance, heat and stir for 1-2 hours, and then return the filter residue to the lead system to recover lead, silver, lead, silver, indium The recoveries of zinc were 114%, 30%, and 79%, respectively; the zinc-containing solution was returned to the direct leaching stage, and the recovery of zinc was 116%.

[0031]

Embodiment approach 3

[0033]Composition of sulfur residue (processed through 120 mesh sieve, dry basis): lead 1.22%, zinc 4.75%, indium 0.0029%, silver 0.0569%, sulfur 74.83%.

[0034] Weigh 5.0000 g of processed sample sulfur residue, 62.5 ml of trichlorethylene, heat in a water bath at 100°C for 8 minutes, filter immediately to obtain 1.8395 g of residue, cool down to 27.5°C to obtain 1.7453 g of sulfur A, continue cooling to 9°C to obtain sulfur B 0.3878 g. The washed filter residue is directly returned to the lead system to recover lead and silver. The recovery rates of lead, silver, indium and zinc are 95%, 96%, 69% and 106% respectively.

[0035]

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Abstract

The invention discloses a process for recovering sulfur, lead, zinc and silver from oxygen-enriched directly leached residues of zinc concentrates or lead-zinc mixed ores, which comprises the following steps: adding the oxygen-enriched directly leached residues of zinc concentrates or lead-zinc mixed ores, which are not processed or subjected to drying, grinding and screening pretreatment, into a heating device in which mixed liquid of a sulfur extracting agent and an additive metered in a liquid-solid ratio of 8-15 is filled, after heating for reaction, filtering the obtained object while the obtained object is hot, and cooling and then filtering filter liquor so as to obtain a sulphur product; after filter residues are washed by using a sulfur extracting agent and ethanol, returning the obtained product to a lead system to recover lead and silver; after washing liquid is volatilized, cooled and recovered, returning the obtained object to use; after the sulfur extracting agent is filtered, regenerating, and returning the obtained object to a sulfur extracting process so as to cyclically participate in the reaction; and after a zinc-containing solution is filtered, returning the obtained product to a direct leaching system. The process is simple in process and equipment and high in sulfur recovery rate and product quality, has no pollution to the environment, both can realize the efficient and economic extraction of sulfur in floating sulfur residues, and can realize the respective efficient and economic recovery of zinc, lead and silver in floating sulfur residues.

Description

technical field [0001] The invention belongs to the field of comprehensive recovery and utilization of nonferrous metal smelting, and in particular relates to a process for recovering sulfur, lead, zinc and silver from zinc concentrate or lead-zinc mixed ore oxygen-enriched direct leaching slag. Background technique [0002] At present, more than 80% of zinc is produced by fire-wet combined process, that is, roasting-leaching-purification-electrowinning process. This process has the advantages of simple process control, convenient operation, high metal recovery rate, and low equipment requirements, but there is also the problem of sulfur dioxide pollution in the roasting flue gas, and the flue gas produced by it needs to make acid, which is not suitable for areas where sulfuric acid consumption is underdeveloped. , and lead to difficult sales of sulfuric acid, uneconomical production problems. Moreover, zinc ferrite is unavoidably formed during the roasting process, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B11/00C22B13/00C22B19/00C22B19/30C01B17/033
CPCY02P10/20
Inventor 蒋晓云欧文伟何劲松唐懿嘉谭思陈金球
Owner 株洲起源科技有限责任公司
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