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Process method of continuously producing ultra-fine nickel powder

A process method and technology of nickel powder, which is applied in the field of continuous production of ultrafine nickel powder by tubular reaction, can solve the problems of unstable production line, difficulty in reducing production cost, and high requirements, so as to ensure uniformity, reduce exposure time, and improve The effect of oxidation

Active Publication Date: 2014-12-10
SHENZHEN NONFEMET TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing ultra-fine nickel powder industrial production methods have the following problems or defects: For example: 1. Nickel carbonyl pyrolysis method: has strong toxicity, so the production process has extremely high requirements for equipment, and the industrialization investment is very large, and domestic The production line is unstable, and there have been safety accidents in the production of related manufacturers; 2. Evaporation and condensation method: the production process of ultra-fine nickel powder is well done in domestic industrialization, but because the nickel needs to be heated above the boiling point, the requirements for equipment Extremely high, and the production cost is difficult to reduce; 3. Electrolysis method: high energy consumption, and the particle size of the prepared powder is too large
However, due to the conventional reactor reaction, and due to the concentration gradient and other problems, there are disadvantages such as difficult to control the particle size of the product in the reaction process, and the reaction product is inconvenient to disperse.

Method used

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  • Process method of continuously producing ultra-fine nickel powder
  • Process method of continuously producing ultra-fine nickel powder
  • Process method of continuously producing ultra-fine nickel powder

Examples

Experimental program
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Effect test

Embodiment 1

[0030] like figure 1 As shown, this method includes the following processes:

[0031] 1) Raw material preparation: 13Kg NiSO 4 . 6H 2 Dissolve O in 100L of deionized water, then add 225g of PVP, stir to dissolve and heat to 60°C to obtain solution A, which is stored in the first storage tank and the third storage tank; dissolve 5.2KgNaOH in 96L of deionized water , stir well and then heat, when the water temperature is 60°C, add 4L of 50% hydrazine hydrate and 1.85Kg NaBH 4 , fully stirred and dissolved and then heated to 60° C. to obtain a mixed solution B which was stored in the second storage tank and the fourth storage tank.

[0032] 2) Material transportation: Pump the two solutions A and B into the reaction pipeline through the metering pump, and control the flow rate of the two solutions at 0.5L / min respectively.

[0033] 3) Ultrasonic enhanced pipeline mixing reaction: Before the reaction, raise the ambient temperature of the reaction pipeline to 60°C and keep it ...

Embodiment 2

[0040]1) Raw material preparation: 13Kg NiSO 4 . 6H 2 O was dissolved in 100L deionized water, then 225g of PVP was added, fully stirred and dissolved, and heated to 80°C to obtain solution A, which was stored in the first storage tank and the third storage tank; 5.2Kg NaOH was dissolved in 77.5L In deionized water, stir thoroughly and then heat. When the water temperature is approaching 80°C, add 22.5 L of hydrazine hydrate with a concentration of 50%, stir well and dissolve, then heat to 80°C to obtain mixed solution B, which is stored in the second storage tank and the fourth storage tank. in the storage tank.

[0041] 2) Material transportation: Pump the two solutions A and B into the reaction pipeline through the metering pump, and control the flow rate of the two solutions at 1.5L / min respectively.

[0042] 3) Ultrasonic enhanced pipeline mixing reaction: Before the reaction, raise the ambient temperature of the reaction pipeline to 80°C and keep it at a constant temp...

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Abstract

The invention provides a process method of continuously producing ultra-fine nickel powder. The process method comprises the working procedures of preparation of raw materials, material conveying, ultrasound enhancement tubular reaction, rapid cleaning of pipelines, ultrasonic agitation stabilizing treatment, continuous cleaning and collection of the powder, vacuum drying, ball-milling dispersion and the like. By means of the technologies, in a preparation course, the process method has the advantages that continuous industrial production can be achieved, equipment investment is small, product quality is stable, and the shapes and the particle sizes of products are controllable.

Description

technical field [0001] The invention relates to a method for producing superfine nickel powder, in particular to a method for continuously producing superfine nickel powder by tubular reaction which is convenient for pipeline cleaning and product collection. Background technique [0002] Due to the advantages of fine particle size, large specific surface area, and high surface energy, ultrafine nickel powder has broad application prospects in the fields of electronics, electric power, metallurgy, and chemical industry. It can be used as conductive paste, secondary battery, catalyst, hard Alloys, electrical alloys and other fields. [0003] The commonly used industrial production methods for ultra-fine nickel powder in China mainly include carbonyl nickel thermal decomposition method, evaporation condensation method, electrolysis method, argon protection mechanical ball milling method, and liquid phase reduction method. Different methods can be used to produce from 0.1 micron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 黄建民周少强宁江天刘银李清湘吴涛万良标张木毅伏志宏刘伟晶
Owner SHENZHEN NONFEMET TECH
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