Method for directly synthesizing high-purity bornite through solid-phase reaction

A solid-phase reaction, bornite technology, applied in the field of mineralogy research, can solve the problems of inability to guarantee product purity, inability to solve the problem of sulfur volatilization in desulfurization reaction, avoiding irregular deformation, avoiding diffusion, strong ductility and plasticity Effect

Active Publication Date: 2020-09-18
INST OF GEOCHEM CHINESE ACADEMY OF SCI +1
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Problems solved by technology

Therefore, although the vacuum tube can avoid the oxidation of sulfide, since the open system cannot solve the problems of desulfurization reaction and sulfur volatilization, it is actually difficult to carry out the solid-phase reaction according to the ideal ratio of bornite, and the purity of the product cannot be guaranteed.

Method used

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Embodiment

[0021] A method for directly synthesizing high-purity bornite by solid phase reaction, comprising the following steps:

[0022] Step 1, using analytically pure cuprous sulfide Cu 2 S, copper sulfide CuS and analytically pure ferrous sulfide FeS are weighed according to a molar ratio of 2:1:1, ground and mixed uniformly as starting materials;

[0023] Step 2. Use a powder tablet press to press the mixture powder in step 1 into a Φ5mm×5mm cylinder, use a powder tablet press to press the analytically pure sulfur powder S into a Φ5mm×0.5mm disc, and prepare two sulfur powder discs ;

[0024] Step 3. Put the mixture cylinder and sulfur powder disc pre-pressed in step 2 into the platinum-graphite dual sample chamber and seal to form a sample. The order of loading samples in the sample chamber from top to bottom is sulfur powder disc-mixture cylinder-sulfur powder The disc is made into a sample, and the made sample is placed in an h-BN tube, and h-BN is used as a pressure transmiss...

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Abstract

The invention discloses a method for directly synthesizing high-purity bornite through a solid-phase reaction. The method comprises the following steps: weighing analytically pure cuprous sulfide, copper sulfide and analytically pure ferrous sulfide according to a molar ratio of 2: 1: 1, and carrying out grinding and uniform mixing to obtain an initial raw material; pressing mixture powder into acylinder, covering the end face of the cylinder with a powdered sulfur wafer, filling platinum-graphite double sample cavities with the powdered sulfur wafer, the mixture cylinder and the powdered sulfur wafer in sequence, sealing the platinum-graphite double sample cavities to prepare a sample, and placing the sample in an h-BN pipe, wherein h-BN serves as a pressure transmission medium; and carrying out high-temperature and high-pressure reaction in a large cubic press, taking out the reacted cylindrical sample, carrying out grinding and polishing, then carrying out ultrasonic cleaning and air drying, and storing the cylindrical sample in an inert gas atmosphere. The obtained bornite is of a single phase and is free of impurities.

Description

technical field [0001] The invention relates to a method for directly synthesizing high-purity bornite by solid phase reaction, which belongs to the field of mineralogy research. Background technique [0002] Bornite is a common copper-iron sulfide mineral, often in dense massive or dispersed granular form, and is enriched in chalcopyrite, chalcocite and other sulfides in porphyry copper deposits of hydrothermal origin, and its copper content is as high as 63.3%, is one of the main mineral raw materials for refining copper. Due to its high copper content, bornite is relatively unstable in chemical properties compared with chalcopyrite, and is easily weathered and oxidized on the surface to form malachite and azurite. In addition, the formation of bornite strongly depends on the ambient temperature, and it is easy to decompose into sulfides such as chalcocite and chalcopyrite when the temperature is high. Therefore, the composition of natural bornite is very complex, and of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/547C04B35/622C04B35/645C01G49/00
CPCC01G49/009C04B35/547C04B35/622C04B35/645C04B2235/446C04B2235/602C04B2235/656C04B2235/6567
Inventor 张珊熔李增胜何程程孟勇梁文李和平
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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