Method for recycling sulphur from sulphur-containing residue

A sulfur and filter residue technology, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of high requirements for thermal filtration equipment, easy to block pipelines, etc., and achieve the effect of small investment, simple equipment, and low energy consumption

Inactive Publication Date: 2017-01-11
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the treatment of the above-mentioned sulfur slag has relatively high requirements for thermal filtration equipment, and at the same time, it is very easy to block the pipeline during thermal filtration.

Method used

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  • Method for recycling sulphur from sulphur-containing residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 200g of sulfur-containing residue and 1000ml of kerosene to the triangular beaker in turn, turn on the magnetic stirring, turn on 800r / min, heat to 135°C for 10 minutes to fully melt the sulfur, keep the temperature of the mixture, and quickly filter it. When there is no drop for a long time, use a small amount of 135℃ kerosene to rinse the filter residue in the funnel. After the filtration is completed, take out the filter residue and dry it to recover the kerosene. The slag desulfurization rate is 98.5%, the desulfurization slag rate is 27.86%, the sulfur content in the desulfurization slag is 3.85%, and the enrichment of valuable metals in the slag exceeds 3 times.

Embodiment 2

[0021] Add 200 grams of sulfur-containing slag and 800ml of kerosene to the triangular beaker in turn, turn on the magnetic stirrer, turn on 600r / min, heat to 140°C and keep it warm for 30 minutes to fully melt the sulfur, keep the temperature of the mixture and quickly filter it. When there is no drop for a long time, use a small amount of 140℃ kerosene to rinse the filter residue in the funnel. After the filtration is completed, take out the filter residue and dry it to recover the kerosene. The slag desulfurization rate is 98.4%, the desulfurization slag rate is 27.98%, the sulfur content in the desulfurization slag is 4.14%, and the enrichment of valuable metals in the slag exceeds 3 times.

Embodiment 3

[0023] Add 200 grams of sulfur-containing slag and 500ml of kerosene to the triangular beaker in turn, turn on the magnetic stirrer, turn on 400r / min, heat to 140°C and keep it warm for 60 minutes to fully melt the sulfur, keep the temperature of the mixture and quickly filter it. When there is no drop for a long time, use a small amount of 140℃ kerosene to rinse the filter residue in the funnel. After the filtration is completed, take out the filter residue and dry it to recover the kerosene. The slag desulfurization rate is 98.2%, the desulfurization slag rate is 28.17%, the sulfur content in the desulfurization slag is 4.57%, and the enrichment of valuable metals in the slag is more than 3 times.

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Abstract

The invention relates to a method for recycling sulphur from a sulphur-containing residue. The method comprises the following steps: mixing the sulphur-containing residue and an organic solvent in a proportion; heating, preserving heat, and stirring to melt the sulphur; keeping the temperature of a mixture and filtering; drying a filtered residue, and recycling the organic solvent; settling and layering a filtrate; returning the organic solvent on the upper layer into a system for reuse; cooling liquid sulphur on the lower layer to obtain finished sulphur. The method disclosed by the invention is simple in equipment, low in investment and energy consumption, high in sulphur recycling rate and low in residue amount; the sulphur content in the residue is low; the valuable metal enrichment factor is large; continuous production is convenient to realize.

Description

technical field [0001] The invention relates to a method for recovering sulfur from sulfur-containing slag, in particular to a method for recovering sulfur from direct leaching slag of zinc smelting. Background technique [0002] Sulfur-containing waste residues mainly come from petroleum, natural gas, waste gas desulfurization residues from coking plants, and sulfide ore metallurgical residues in non-ferrous smelting. Sulfur in minerals or raw materials is often converted into sulfur dioxide in industry, but sulfur dioxide is easy to cause environmental pollution, so some new technologies use the method of converting sulfur into sulfur. With the development of industry and the improvement of environmental protection requirements, the amount of sulfur-containing waste residue is increasing. A zinc direct leaching project in China can produce about 76,000 tons of sulfur slag with a sulfur content of 40-50% per year. After the sulfur slag is treated by flotation, sulfur-rich ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/033
CPCC01B17/033
Inventor 张德晶李正明窦传龙张伟林文军吕娟
Owner ZHUZHOU SMELTER GRP
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