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Production method of dentritic morphology nickel powder

A production method and dendritic technology are applied in the production field of dendritic nickel powder, and can solve the problems of high preparation cost, high production cost, depleted nickel-containing raw materials and solutions, and the like

Active Publication Date: 2005-08-10
JINCHUAN GROUP LIMITED
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In the existing production method of nickel powder, the preparation cost is high due to the limitations of the raw materials and technological process used.
At present, especially in smelting enterprises that use copper, nickel, and cobalt as products, a large amount of depleted nickel-containing raw materials and solutions will be produced during the extraction and electrolysis of metals, which will have a negative impact on the metal yield in the production process , usually this part of the solution is processed and returned to the production process to increase the metal yield, resulting in a long production process, complicated procedures, and high production costs

Method used

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  • Production method of dentritic morphology nickel powder

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example 1

[0023] Adopt the calcium-removing magnesium feed liquid of the nickel sulfate production system; take P 204 The full extraction process uses 3.5N acidity hydrochloric acid (HCl) for back extraction, and the concentration of the back extraction solution is: 70-80g / l. The solution of the prepared nickel chloride is adsorbed by activated carbon, and the removal rate of organic matters is 90%. After removing the organic matter, pump the solution into the reaction kettle, dilute it with reverse osmosis pure water to 35g / l, pass liquid ammonia to adjust the pH of the solution to 8, and make nickel ions form nickel ammonium complex ions; prepare about 100g / l The oxalic acid solution is filtered and poured into the high level tank for use.

[0024] Beat 200 liters of nickel chloride solution with a nickel content of 35g / l to 0.5m 3 In the reaction kettle, pass liquid ammonia to adjust the pH to 8.2, add 0.50% PVP or sodium citrate additive according to the amount of nickel, heat the...

Embodiment 2

[0030] Other conditions are the same as example 1, back-extract with hydrochloric acid (HCl) of 3N acidity, prepare the solution of 70~80g / l nickel chloride and absorb through activated carbon, the organic matter removal rate is 90%. After removing the organic matter, pump the solution into the reaction kettle, dilute it with reverse osmosis pure water to 50g / l, pass liquid ammonia to adjust the pH of the solution to 8.3, and make nickel ions form nickel ammonium complex ions; prepare about 100g / l The oxalic acid solution is filtered and poured into the high level tank for use.

[0031] Beat 200 liters of nickel chloride solution with a nickel content of 50g / l to 0.5m 3 In the reaction kettle, pass liquid ammonia to adjust the pH to 8.5, add 0.6% PVP or sodium citrate additive according to the amount of nickel, heat the solution with steam until the solution temperature is 70°C, start to add 100g / l oxalic acid solution dropwise, and pass a small amount of Liquid ammonia, keep...

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Abstract

A process for preparing the dendritic Ni powder includes such steps as extracting of nickel sulfate solution to become the solution of nickel chloride (or nitrate), preparing nickel-ammonia complex solution, depositing in oxalic acid solution to obtain nickel oxalate, vacuum fitlering, washing, drying, reducing by the mixture of H2 and N2, and pulverizing.

Description

technical field [0001] A production method of dendritic nickel powder relates to a method for producing metal powder by utilizing a hydrometallurgical method, in particular adopting the nickel-containing solution in the production process of nickel, copper and cobalt smelting, converting nickel chloride ( Nickel nitrate), and then prepared into a nickel oxalate salt with a special shape, to carry out the production method of dendritic nickel powder. Background technique [0002] With the rapid development of various industries such as modern electronics, magnetic materials, conductive pastes, catalysts, parts, high-capacity batteries, organic synthesis, aerospace devices, etc., the requirements for powder products are getting higher and higher, not only the relative chemical composition Purification puts forward higher requirements on some physical characteristics of powder products. For example, ultrafine nickel powder prepared from nickel oxalate is widely used in chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/00C22B3/10C22B3/14C22B3/16C22B3/22C22B23/00
CPCY02P10/20
Inventor 汪锦瑞陈自江米瑛范桂芳柳永乾
Owner JINCHUAN GROUP LIMITED
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