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Environmental friendly nickel board and processing technology and device thereof

A production process and environment-friendly technology, applied in the field of metallurgical products and its production technology and equipment, can solve the problems of restricting industrial development, high power consumption, troubles, etc., and achieve the effects of improving the production environment, increasing current efficiency, and large specific surface area

Active Publication Date: 2007-08-01
GEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel sheets produced by electrolysis can obtain nickel sheets with high purity. However, the electric energy consumption of electrolytic nickel production process is very high, and during the electrolysis process, nickel sulfate and hydrochloride volatilize acid mist, which is harmful to the production environment and living environment. will cause serious pollution
Therefore, the state restricts: in areas with dense population and energy shortage, it is not allowed to invest in the construction of electrolytic nickel production technology, so that now it can only invest in the construction of industrial equipment for electrolytic nickel sheets in Gansu, Sichuan, Xinjiang and other places with sparsely populated and economically underdeveloped areas
This greatly restricts the development of the industry, resulting in a serious shortage of raw material supply of nickel sheet
In addition, because the electrolytic method of producing nickel sheets is carried out under the condition that the deposition of nickel sheets cannot be artificially controlled, the size, shape, and density of the nickel sheets are irregular, which brings troubles and troubles to subsequent transportation, production and utilization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Production process embodiment 1 of the present invention comprises the following steps:

[0024] A1, make containing nickel sulfate or nickel chloride salt solution;

[0025] A2, add sodium carbonate or sodium oxalate in nickel sulfate or nickel chloride salt solution, make the crystal precipitation of nickel carbonate or nickel oxalate;

[0026] A3, under the reducing atmosphere mainly dissociated ammonia, the ratio of hydrogen and nitrogen is 1:3, control the composition of reducing atmosphere and calcining heating rate, time, reduce the nickel salt particle that calcining obtains, make particle diameter in 10 μ m Left and right nickel powder, the nickel content of nickel powder exceeds 99.3%;

[0027] A4, then press the nickel powder into a nickel sheet compact, the thickness of the compact is controlled to 2.5mm, and the density of the compact is 5g / CM 3 Left and right, put them into the series of material pushing boats of corresponding size in the reduction furna...

Embodiment 2

[0033] In this embodiment, the thickness of the green compact extruded during the tableting process is 4.0 mm, and the density of the green compact is 7 g / cm3. The nickel powder used in this embodiment has a particle size of about 20 μm.

[0034] The heating temperature of the nickel sheet compact in the low-temperature pre-sintering stage is 450°C, and the heating time is 2.5 hours; the heating temperature of the nickel sheet compact in the high-temperature sintering stage is 950°C, and the heating time is 8 hours; The density of the nickel plate product is 7.5g cm 3 . Other content is basically the same as embodiment 1.

Embodiment 3

[0036] In this embodiment, the thickness of the green compact extruded during the tableting process is 6.0 mm, and the density of the green compact is 8 g / cm3. . The nickel powder used in this embodiment has a particle size of about 30 μm.

[0037] The heating temperature of the nickel sheet compact in the low-temperature pre-sintering stage is 500°C, and the heating time is 4 hours; the heating temperature of the nickel sheet compact in the high-temperature sintering stage is 850°C, and the heating time is 7 hours; The density of the nickel plate product is 6.4g cm 3 . Other content is basically the same as embodiment 1.

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Abstract

The invention involves an environment friendly nickel plate product and its production technology and equipment, the production process includes the following steps: A) adding alkaline salt of carbon-oxygen covalent acid group into solution containing nickel salt, preparing crystallization precipitation of nickel carbonate salt or carboxyl acid nickel salt, calcining the nickel salt particles in deacidizing atmosphere and preparing nickel powder, then pressing the nickel powder into nickel piece pressed compact; B) clinkering the nickel piece pressed compact into nickel plate product in deacidizing atmosphere. The production technology and equipment has the following advantages: it reduces electricity energy consumption and environmental pollution of nickel plate significantly, and the range of density and porosity rate of nickel plate product is adjustable, the size and shape of nickel plate is easy to control to facilitating the follow processing.

Description

technical field [0001] The invention relates to a metallurgical product and its production technology and equipment, more specifically, the invention relates to a nickel plate and its production technology and equipment. Background technique [0002] Nickel has many excellent physical and chemical properties, so it is used in many fields and products: for example, it has become the main component of many magnetic materials because of its good magnetic properties; nickel also has good oxidation resistance. In the air, nickel surface forms NiO thin film, which prevents further oxidation. Experiments have proved that nickel with a purity of 99% will not rust within 20 years. Nickel has strong corrosion resistance, especially to caustic alkali. In 50% boiling caustic soda solution, the annual rate of nickel The corrosion rate does not exceed 25 microns, so nickel is widely used to manufacture various types of stainless steel, soft magnetic alloys and alloy structural steels. Ni...

Claims

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Application Information

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IPC IPC(8): B22F9/22B22F3/16
Inventor 许开华
Owner GEM CO LTD
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