Ultrasonic extraction method and process for processing slag containing elemental sulfur

Abstract

The invention discloses an ultrasonic extraction method and process for processing slag containing elemental sulfur. One or a mixture of more of tetrachloroethylene, trichloro ethylene, methylbenzene and xylene is adopted as a solvent; ultrasonic extraction is carried out on the slag containing elemental sulfur; the ultrasonic frequency is 20-200KHz; and the sound intensity is 2.0-50w / cm<2>. According to the ultrasonic extraction method, low-temperature extraction can be achieved without high temperature, energy consumption can be greatly reduced, and the process is low in cost, simple and feasible in operation, high in extraction efficiency, large in raw material processing amount, low in extracting agent loss and significant in composite economic results.

Description

technical field

[0001] The invention relates to a method and process for treating slag containing elemental sulfur, in particular to an ultrasonic extraction method and process for treating slag containing elemental sulfur, which belongs to the technical field of hydrometallurgy. Background technique

[0002] The zinc sulfide concentrate is treated by the pressurized oxygen-enriched leaching method or the atmospheric pressure oxygen-enriched leaching method. Metals such as zinc, copper, cadmium, cobalt, and nickel enter the liquid phase. The form enters the slag phase, and the slag containing elemental sulfur, lead and silver is produced. The methods for recovering elemental sulfur from slag containing elemental sulfur mainly include physical, chemical, and biological methods. Physical methods mainly include thermal filtration, high-pressure decantation, vacuum distillation, and flotation; chemical methods mainly include ammonium sulfide sulfur extraction, xylene sulfur ext...

Examples

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, 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, cool down to 27.5°C to obtain 0.7483g of sulfur, and the extraction rate of sulfur is 32%.

[0031] If ultrasonic extraction is used during the heating reaction, 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] Sound intensity (w / cm 2 ) 2.0 2.8 10 20 35 50 output quality 1.3843 1.5714 1.8410 2.1326 2.5442 2.6938 Sulfur extraction rate 37% 42% 49% 57% 68% 72%

[0033] If ultrasonic extraction is used during the heating reaction, the ultrasonic frequency is 100...

Embodiment approach 2

[0038]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 10.0000g of sulfur residue, 125ml (100g) of a mixture of trichlorethylene and xylene, heat in a water bath at 100°C for 30min, filter immediately to obtain 6.3962g of residue, cool down to 27.5°C to obtain 2.2449g of sulfur, and the extraction rate of sulfur is 30%. In the comprehensive utilization process of zinc concentrate or lead-zinc mixed ore normal pressure / high pressure oxygen-enriched direct leaching residue, the zinc, lead, and silver in the filter residue are enriched and directly returned to the lead system to recover lead, silver, lead, silver, and indium , Zinc recovery rates were 110%, 34%, 89%, 113%.

[0039] 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 extract...

Embodiment approach 3

[0046] 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 10.0000g of sulfur residue, 125ml (100g) of tetrachlorethylene, heat in a water bath at 100°C for 30min, filter immediately to obtain 6.3962g of residue, cool down to 27.5°C to obtain 2.0952g of sulfur, and the sulfur extraction rate is 28%. In the comprehensive utilization process of zinc concentrate or lead-zinc mixed ore normal pressure / high pressure oxygen-enriched direct leaching residue, the zinc, lead, and silver in the filter residue are enriched, and the zinc is first leached and recovered, and then the filter residue is sent to the lead system to recover lead and silver. , the zinc-containing filtrate is returned to the direct leaching system. At this time, the recovery rates of lead, silver, indium, and zinc were 120%, 36%, 85%, and 124%, respectively.

[0047] If ultrasonic extraction is used during the heati...

technical field

[0001] The invention relates to a method and process for treating slag containing elemental sulfur, in particular to an ultrasonic extraction method and process for treating slag containing elemental sulfur, which belongs to the technical field of hydrometallurgy. Background technique

[0002] The zinc sulfide concentrate is treated by the pressurized oxygen-enriched leaching method or the atmospheric pressure oxygen-enriched leaching method. Metals such as zinc, copper, cadmium, cobalt, and nickel enter the liquid phase. The form enters the slag phase, and the slag containing elemental sulfur, lead and silver is produced. The methods for recovering elemental sulfur from slag containing elemental sulfur mainly include physical, chemical, and biological methods. Physical methods mainly include thermal filtration, high-pressure decantation, vacuum distillation, and flotation; chemical methods mainly include ammonium sulfide sulfur extraction, xylene sulfur ext...

Examples

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, 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, cool down to 27.5°C to obtain 0.7483g of sulfur, and the extraction rate of sulfur is 32%.

[0031] If ultrasonic extraction is used during the heating reaction, 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] Sound intensity (w / cm 2 ) 2.0 2.8 10 20 35 50 output quality 1.3843 1.5714 1.8410 2.1326 2.5442 2.6938 Sulfur extraction rate 37% 42% 49% 57% 68% 72%

[0033] If ultrasonic extraction is used during the heating reaction, the ultrasonic frequency is 100...

Embodiment approach 2

[0038]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 10.0000g of sulfur residue, 125ml (100g) of a mixture of trichlorethylene and xylene, heat in a water bath at 100°C for 30min, filter immediately to obtain 6.3962g of residue, cool down to 27.5°C to obtain 2.2449g of sulfur, and the extraction rate of sulfur is 30%. In the comprehensive utilization process of zinc concentrate or lead-zinc mixed ore normal pressure / high pressure oxygen-enriched direct leaching residue, the zinc, lead, and silver in the filter residue are enriched and directly returned to the lead system to recover lead, silver, lead, silver, and indium , Zinc recovery rates were 110%, 34%, 89%, 113%.

[0039] 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 extract...

Embodiment approach 3

[0046] 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 10.0000g of sulfur residue, 125ml (100g) of tetrachlorethylene, heat in a water bath at 100°C for 30min, filter immediately to obtain 6.3962g of residue, cool down to 27.5°C to obtain 2.0952g of sulfur, and the sulfur extraction rate is 28%. In the comprehensive utilization process of zinc concentrate or lead-zinc mixed ore normal pressure / high pressure oxygen-enriched direct leaching residue, the zinc, lead, and silver in the filter residue are enriched, and the zinc is first leached and recovered, and then the filter residue is sent to the lead system to recover lead and silver. , the zinc-containing filtrate is returned to the direct leaching system. At this time, the recovery rates of lead, silver, indium, and zinc were 120%, 36%, 85%, and 124%, respectively.

[0047] If ultrasonic extraction is used during the heati...

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