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A method for ultrasonically intensified recovery of sulfur, lead, zinc and silver from oxygen-enriched direct leaching slag of zinc concentrate or lead-zinc mixed ore

A technology of mixing minerals and ultrasonic waves, applied in chemical instruments and methods, inorganic chemistry, sulfur compounds, etc., can solve problems such as handling difficulties, hidden dangers, and capital backlog environment, and achieve good safety, small loss, and large raw material processing capacity. Effect

Active Publication Date: 2017-01-18
株洲起源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of zinc concentrate or lead-zinc mixed ore normal pressure / high pressure oxygen-enriched direct leaching slag containing 40-60% sulfur, it still contains a certain amount of valuable metals such as zinc, lead and silver. Currently, there are processing difficulties, a backlog of funds and environmental Hidden dangers and other problems, the present invention has designed a zinc concentrate or lead-zinc mixed ore oxygen-enriched direct leaching slag ultrasonically enhanced recovery method of sulfur and lead, zinc, silver

Method used

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  • A method for ultrasonically intensified recovery of sulfur, lead, zinc and silver from oxygen-enriched direct leaching slag of zinc concentrate or lead-zinc mixed ore
  • A method for ultrasonically intensified recovery of sulfur, lead, zinc and silver from oxygen-enriched direct leaching slag of zinc concentrate or lead-zinc mixed ore
  • A method for ultrasonically intensified recovery of sulfur, lead, zinc and silver from oxygen-enriched direct leaching slag of zinc concentrate or lead-zinc mixed ore

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] 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%. Weigh 5.0000g of sulfur residue, 1.0000g of A# additive, 62.5ml (100g) of a mixture of tetrachlorethylene and toluene, heat in a water bath at 100°C for 30min, and filter immediately to obtain 3.2126g of residue. Depending on the sound intensity and reaction time, the quality of the sulfur product obtained is also different.

[0031] If during the heating reaction process, ultrasonic enhancement is used, the ultrasonic frequency is 20KHz, and the sound intensity is 2.0-50w / cm 2 Between, the reaction time is 8min, at this moment the extraction rate of sulfur sees the following table:

[0032]

[0033] If in the process of heating reaction, ultrasonic strengthening is used, the ultrasonic frequency is 100KHz, and the sound intensity is 2.0-50w / cm 2 Between, the reaction time is 12min, at this moment the extraction rate of su...

Embodiment approach 2

[0040] 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%. Weigh 10.0000 g of the processed sample sulfur residue, 125 ml of trichlorethylene, 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, with the difference of ultrasonic frequency, sound intensity and reaction time, the obtained sulfur Product quality also varies.

[0041] If ultrasonic extraction is used during the heating reaction, the ultrasonic frequency is 30KHz, and the sound intensity is 2.0-50w / cm 2 Between, the reaction time is 9min, at this moment the extraction rate of sulfur sees the following table:

[0042]

[0043] If ultrasonic extraction is used during the heating reaction, the ultrasonic frequency is 120KHz, and the sound intensity is 2.0-50w / cm 2 Between, the reaction time is 11min, at this moment the extraction rate of sulfur sees the following...

Embodiment approach 3

[0050] 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%. Weigh 10.0000 grams of sulfur residue, 125ml (100 grams) of tetrachlorethylene, heat in a water bath at 100°C for 30 minutes, and filter immediately to obtain 6.3962 grams of residue. Cool down to 27.5°C. The obtained sulfur Product quality also varies.

[0051] If ultrasonic extraction is used during the heating reaction, the ultrasonic frequency is 40KHz, and the sound intensity is 2.0-50w / cm 2 Between, the reaction time is 8min, at this moment the extraction rate of sulfur sees the following table:

[0052]

[0053] If ultrasonic extraction is used during the heating reaction, the ultrasonic frequency is 130KHz, and the sound intensity is 2.0-50w / cm 2 Between, the reaction time is 12min, at this moment the extraction rate of sulfur sees the following table:

[0054]

[0055] If ultrasonic extraction is used during t...

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Abstract

The invention discloses a method for recovering sulfur, lead, zinc and silver from oxygen-rich direct leaching residues of zinc concentrate or lead and zinc mixed ores by virtue of ultrasonic wave intensification, belonging to the field of comprehensive recycling of non-ferrous metal metallurgy. The method disclosed by the invention comprises the following steps: by using tetrachloroethylene or trichloro ethylene as a solvent, extracting elemental sulfur from the oxygen-rich direct leaching residues of zinc concentrate or lead and zinc mixed ores, which are dried, ground, and sieved by virtue of ultrasonic wave intensification, preserving heat and filtering, after naturally cooling and forcibly cooling the filtrate and filtering to obtain a sulfur product, and returning a regenerated sulfur extraction agent to a sulfur extraction step; and enriching zinc, lead and silver in the residues, wherein the residues can be directly fed to a lead system to recover zinc, lead and silver, or the residues are firstly leached to recover zinc, filter residues are fed to the lead system to recover silver, and zinc-containing filtrate is returned to a direct leaching system. The method disclosed by the invention is simple, energy-saving and high in sulfur recovery rate and product quality. The sulfur extraction process is sealed, so that the method is free from environmental pollution and is particularly suitable for comprehensively utilizing normal pressure / high pressure oxygen-rich direct leaching residues of zinc concentrate or lead and zinc mixed ores.

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 method for ultrasonically intensified recovery of sulfur, lead, zinc and silver from oxygen-enriched direct leaching slag of zinc concentrate or lead-zinc mixed ore. Background technique [0002] At present, more than 80% of zinc is produced by fire-wet combined process, that is, roasting-leaching-purification-electrowinning process. The process is mature, the process control is simple and easy to operate, the metal recovery rate is high, and the equipment requirements are not high. However, there is also sulfur dioxide pollution in the roasting flue gas, and the production of flue gas requires acid production. For areas where sulfuric acid consumption is underdeveloped, there is a problem of sulfuric acid sales. In addition, zinc ferrite is inevitably formed during the roasting process. The zinc leaching rate is not...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B11/00C22B13/00C22B19/30C01B17/033
CPCY02P10/20
Inventor 唐懿嘉欧文伟谭思蒋晓云何劲松陈金球
Owner 株洲起源科技有限责任公司
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