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Method for performing qualitative and quantitative analysis on chalcopyrite leaching residue by using simultaneous thermal analyzer

A technology of simultaneous thermal analysis and thermal analysis method, which is applied in the field of qualitative and quantitative analysis of chalcopyrite leaching slag, and can solve problems such as large environmental pollution

Active Publication Date: 2017-08-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] There are many methods for measuring sulfur content, the most commonly used is organic solvent extraction, but this method needs to use organic solvents such as toluene, cyclohexane, n-octane, etc.
These organic solvents are relatively harmful to the environment

Method used

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  • Method for performing qualitative and quantitative analysis on chalcopyrite leaching residue by using simultaneous thermal analyzer
  • Method for performing qualitative and quantitative analysis on chalcopyrite leaching residue by using simultaneous thermal analyzer
  • Method for performing qualitative and quantitative analysis on chalcopyrite leaching residue by using simultaneous thermal analyzer

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specific Embodiment 2

[0044] 1. Determination and results of artificial mixed ore are attached figure 1 shown.

[0045] 2. Carry out synchronous thermal analyzer test on chalcopyrite leaching slag. The temperature was raised from 25°C to 400°C at a rate of 5°C / min. Nitrogen is used as protective gas, and the flow rate of nitrogen is 100ml / min. Get the heat and mass change curve, as attached image 3 shown.

[0046] 3. by attached image 3 It can be seen that the DSC curve has two endothermic peaks at 112.4°C and 120.2°C, corresponding to orthorhombic sulfur and monoclinic sulfur, respectively. The total fusion enthalpy of these two sulfurs is 29.35 J / g. Put this value into figure 1In the fitting curve equation, the content of sulfur is obtained as 58.67%. That is, the total content of elemental sulfur in the leaching residue. The maximum weight loss was 60.48%, with a difference of 1.81%.

[0047] 4. Heat the toluene to 60°C, pour 3.00230g of the leaching residue into the toluene, stir wi...

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Abstract

The present invention discloses a method for performing qualitative and quantitative analysis on chalcopyrite leaching residue by using a simultaneous thermal analyzer. According to the determination method based on the simultaneous thermal analyzer, differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) are combined to synchronously complete the measurement of DSC and TG; the elemental sulfur melting heat in the residue is calculated according to the DSC curve, the weight loss of the sample is calculated according to the TG curve, the corresponding mathematical equation is obtained from the relationship between the change value of the artificial mixing mineral heat and the weight loss, the chalcopyrite leaching residue is determined by the simultaneous thermal analyzer, and the actual melting enthalpy of the leaching residue is obtained according to the DSC curve, and is substituted into the mathematical equation so as to calculate the sulfur content in the residue, such that the whether the elemental sulfur in the leaching residue exists in both forms such as orthorhombic sulfur and monoclinic sulfur can be determined. The present invention provides the method for simply and efficiently determining the elemental sulfur.

Description

[0001] Technical field: [0002] The invention belongs to two fields of analysis and testing technology and mineral processing, and specifically relates to a method for qualitative and quantitative analysis of chalcopyrite leaching slag by using a synchronous thermal analyzer. [0003] Background technique: [0004] There are two types of methods for smelting copper from chalcopyrite: fire method and wet method. Pyrochemical copper smelting pollutes the environment a lot, and it is not suitable for processing low-grade copper ore. Copper hydrometallurgy has an absolute advantage in terms of production cost, production investment, resource utilization, and environmental protection. In recent years, many domestic and foreign scholars have conducted a lot of research on the hydrometallurgy of chalcopyrite. The most important research is the oxidation leaching of chalcopyrite. During the oxidative leaching process of chalcopyrite, according to the degree of reaction, the sulfur ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/48G01N5/04
CPCG01N5/04G01N25/48
Inventor 陈运法叶树峰吕翠翠钱鹏丁剑刘娅
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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