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Zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method

A technology of oxygen pressure acid leaching and analysis method, which is applied in the field of safety analysis of zinc concentrate oxygen pressure acid leaching high-sulfur slag, can solve problems such as complex occurrence characteristics of toxic elements, achieve a comprehensive understanding of ignition characteristics, reduce errors, and alleviate The effect of environmental pressure

Active Publication Date: 2020-09-08
CENT SOUTH UNIV
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  • Description
  • Claims
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Problems solved by technology

[0003] The occurrence characteristics of valuable components and toxic elements in slag are complex, and it is necessary to have a detailed understanding of them before their comprehensive resource utilization and safe disposal. The research on environmental hazard analysis and evaluation is still blank

Method used

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  • Zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method
  • Zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method
  • Zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method

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Experimental program
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Embodiment

[0076] 1 Determination of ignition point

[0077] 1.1 Using the Mettler 1100LF thermogravimetric analyzer to obtain the thermogravimetric curve of oxygen pressure acid leaching high sulfur slag in a large-scale wet zinc smelting plant in South China at a heating rate of 5°C / min in the air environment, as shown in figure 1 shown.

[0078] 1.1 Fixed weight loss method: the temperature point corresponding to the point on the combustion curve when the weight loss rate reaches 10% is defined as the ignition point, such as figure 1 Shown at point B. According to this definition, the ignition temperature of high-sulfur slag is 236.97°C.

[0079] 1.2 TG-DTG method: Select the minimum peak point on the DTG curve as a vertical line intersecting with the TG line at point C, which is the abrupt combustion point. The intersection point D of the tangent line passing through point C of the TG curve and the parallel line at the beginning of weight loss corresponds to the ignition temperatu...

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Abstract

The invention belongs to the technical field of harmful solid waste determination and particularly relates to a zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method.The zinc concentrate oxygen pressure acid leaching high-sulfur slag safety analysis method comprises steps that the ignition point and leaching toxicity of zinc concentrate oxygen pressure acid leaching high-sulfur slag and an occurrence form of heavy metal toxic elements are measured, and safety of the zinc concentrate oxygen pressure acid leaching high-sulfur slag is analyzed based on the measurement result. The method is helpful for improving the safety degree of links such as collection, storage, transportation, reutilization and disposal of the high-sulfur slag, can analyze and evaluate the environmental hazard risk, and can further be extensively applied to other non-ferrous smelting waste slag.

Description

Technical field: [0001] The invention belongs to the technical field of hazard assessment of harmful solid waste, and in particular relates to a method for analyzing the safety of high-sulfur slag from oxygen pressure acid leaching of zinc concentrate. Background technique: [0002] my country is a big producer and consumer of non-ferrous metals, and its zinc production and consumption have ranked first in the world for many years. The mainstream zinc sulfide concentrate direct leaching process will produce a large amount of high-sulfur slag, which is a highly toxic and hazardous waste. Its collection, storage, transportation, utilization and disposal are all managed as hazardous waste. If it is not processed safely and resourced, It may face problems such as paying high taxes and disposal fees every year. At the same time, if the pollutants in the slag cannot be completely removed, it will seriously endanger the health of residents, animal husbandry, agriculture and urban ...

Claims

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Application Information

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IPC IPC(8): G01N25/22G01N21/73G01N27/62G01N21/64G01N5/04G01N27/626
CPCG01N25/22G01N5/04G01N21/6404G01N27/62G01N21/73
Inventor 何静胡方园代杰陈永明
Owner CENT SOUTH UNIV
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