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Preparation method of amorphous nickel sulfide

A nickel sulfide and amorphous technology, which is applied in the field of preparation of amorphous nickel sulfide, can solve the problems of increasing sodium sulfide dosage, decreasing utilization rate, large specific surface area, etc.

Active Publication Date: 2014-06-18
JINCHUAN GROUP LIMITED +1
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  • Claims
  • Application Information

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Problems solved by technology

When sodium sulfide is dissolved, because the solution contains a small amount of dissolved oxygen, it will react after encountering reducing sodium sulfide, oxidizing part of sodium sulfide, the amount of sodium sulfide increases, and the utilization rate decreases; sodium sulfide is added to the copper removal solution. Nickel sulfide solid particles are formed by reacting in the medium, because the particle size is small, the surface atomic ratio is large, the specific surface area is large, the surface energy is large, and the energy is unstable. The nickel sulfide solid particles tend to gather together, and the agglomeration of nickel sulfide occurs. Low production efficiency

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  • Preparation method of amorphous nickel sulfide

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preparation example Construction

[0014] A kind of preparation method of amorphous nickel sulfide, concrete steps are as follows:

[0015] a, sodium sulfide dissolved

[0016] Add tap water at a temperature of 5~25°C to the sodium sulfide dissolving tank, add a stabilizer, the volume ratio of the stabilizer to tap water is 0.18~0.25:100, stir for 10~20 minutes, add industrial sodium sulfide with a purity of 60%, and dissolve Control the concentration of sodium sulfide at 90~120g / l, stir for 1~1.5 hours, then add dispersant, the volume ratio of dispersant to tap water is 0.15~0.2:100, stir for 0.5~1 hour;

[0017] b. Preparation of amorphous nickel sulfide

[0018] Take another container and add the solution after copper removal, the nickel concentration in the solution after copper removal is 75~85g / l, the temperature is 20~40°C, the pH value is 3.2~3.6, add anhydrous sodium sulfite, stir for 0.5~1 hour, after the sodium sulfite is dissolved The concentration is 0.8~1g / l, then add dispersant, the volume rati...

Embodiment 1

[0022] A kind of preparation method of amorphous nickel sulfide, concrete steps are as follows:

[0023] a, sodium sulfide dissolved

[0024] Add tap water at a temperature of 5~25°C to the sodium sulfide dissolving tank, add a stabilizer, the volume ratio of the stabilizer to tap water is 0.18:100, stir for 10~20 minutes, add industrial sodium sulfide with a purity of 60%, and dissolve the sodium sulfide Control the concentration at 90g / l, stir for 1-1.5 hours, then add dispersant, the volume ratio of dispersant to tap water is 0.15:100, stir for 0.5-1 hour;

[0025] b. Preparation of amorphous nickel sulfide

[0026] Take another container and add the solution after copper removal, the nickel concentration in the solution after copper removal is 75g / l, the temperature is 20~40°C, the pH value is 3.2~3.6, add anhydrous sodium sulfite, stir for 0.5~1 hour, the concentration of sodium sulfite after dissolution is 0.8g / l, then add dispersant, the volume ratio of dispersant to ...

Embodiment 2

[0028] A kind of preparation method of amorphous nickel sulfide, concrete steps are as follows:

[0029] a, sodium sulfide dissolved

[0030] Add tap water at a temperature of 5~25°C to the sodium sulfide dissolving tank, add a stabilizer, the volume ratio of the stabilizer to tap water is 0.25:100, stir for 10~20 minutes, add industrial sodium sulfide with a purity of 60%, and dissolve the sodium sulfide Control the concentration at 120g / l, stir for 1-1.5 hours, then add dispersant, the volume ratio of dispersant to tap water is 0.2:100, stir for 0.5-1 hour;

[0031] b. Preparation of amorphous nickel sulfide

[0032] Take another container and add the solution after copper removal, the nickel concentration in the solution after copper removal is 85g / l, the temperature is 20~40°C, the pH value is 3.2~3.6, add anhydrous sodium sulfite, stir for 0.5~1 hour, the concentration of sodium sulfite after dissolution is 1g / l, then add dispersant, the volume ratio of dispersant to co...

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Abstract

The invention relates to a chemical purification method, and in particular relates to a preparation method of amorphous nickel sulfide. The preparation method provided by the invention is obviously different from the traditional nickel sulfide preparation method and is characterized in that a stabilizer is added when sodium sulfide is dissolved, so that the oxidation of the sodium sulfide is avoided and the system reducibility is ensured at the same time; a dispersant is added, so that a polysulfide is prevented from formed in the sodium sulfide; and a reducing agent is added into a copper suspension, so that the reducibility of the system for preparing the nickel sulfide is presented. When the amorphous nickel sulfide is prepared, the adding quantity of the sodium sulfide is controlled and the even stirring is carried out, so that the local excess sulfur source is avoided, namely, the polysulfide formed due to the local excess sulfur source is avoided; and meanwhile, the dispersant is added, so that the collision probability among the nickel sulfides is reduced, namely, the activity of nickel sulfide is maintained for a long time. According to the traditional method, after the prepared nickel sulfide is placed in the air for 24 hours, the copper removal activity of the nickel sulfide is gradually decreased; and after the prepared nickel sulfide is placed in the air for 48 hours, the copper removal activity of the nickel sulfide is decreased to 15% to 20%. According to the method provided by the invention, after the amorphous nickel sulfide is placed in the air for 7 days, the copper removal activity of the amorphous nickel sulfide can be still maintained at 80% to 90%.

Description

technical field [0001] The invention relates to a chemical purification method, in particular to a method for preparing amorphous nickel sulfide. Background technique [0002] In the traditional nickel sulfide preparation process, sodium sulfide is directly dissolved, and then added to the copper solution to react to form nickel sulfide. When sodium sulfide is dissolved, because the solution contains a small amount of dissolved oxygen, it will react after encountering reducing sodium sulfide, oxidizing part of sodium sulfide, the amount of sodium sulfide increases, and the utilization rate decreases; sodium sulfide is added to the copper removal solution. Nickel sulfide solid particles are formed by reacting in the medium, because the particle size is small, the surface atomic ratio is large, the specific surface area is large, the surface energy is large, and the energy is unstable. The nickel sulfide solid particles tend to gather together, and the agglomeration of nickel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/11
Inventor 郭勇陈自江郑军福赵重卢建波王得祥刘冬莉朱纪念翟惠明王立成
Owner JINCHUAN GROUP LIMITED
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