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Ferronickel refining process

A ferronickel and process technology, applied in the field of ferronickel refining process, can solve the problems of poor ferronickel effect and inability to remove impurity elements, etc., and achieve the effect of low price and low cost

Active Publication Date: 2021-04-27
邢台德勤工矿工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But for foundries, most foundries are only equipped with induction melting furnaces, which do not have the ability to remove impurity elements, so for some heat-resistant castings, such as rolls, the effect of direct use of ferronickel is poor

Method used

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  • Ferronickel refining process
  • Ferronickel refining process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add ferronickel smelted by blast furnace method containing 4.2%C, 3.2%Si, 0.8%Mn, 0.135%P, 0.352%S, 1.55%Ni, 4.23%Cr into the induction furnace, heat and melt, and control the temperature to 1500℃ to obtain nickel For molten iron, add 200Kg / t of iron oxide scale into the molten iron ladle, pour the molten nickel iron in the induction furnace into the molten iron ladle to remove impurities to obtain the first impurity-removed nickel-iron molten iron, and remove the slag from the first impurity-removed nickel-iron molten iron. Pour the molten nickel iron after slag removal back to the induction furnace to control the temperature to 1600°C; pour the molten nickel iron from the induction furnace into the molten iron ladle, add 25Kg / t industrial soda ash along with the iron flow, remove impurities in the nickel iron water, and obtain the first For the molten nickel-iron that has been removed for the second time, slag is removed from the molten nickel-iron that has been remove...

Embodiment 2

[0053] Add ferronickel smelted by the blast furnace method containing 4.3%C, 2.7%Si, 0.65%Mn, 0.122%P, 0.466%S, 3.82%Ni, 4.71%Cr into an induction furnace, heat and melt, and control the temperature to 1480°C to obtain nickel For molten iron, add 210Kg / t iron oxide scale into the molten iron ladle, pour the molten nickel iron in the induction furnace into the molten iron ladle to remove impurities to obtain the first impurity-removed nickel-iron molten iron, and remove the slag from the first impurity-removed nickel-iron molten iron. Pour the molten nickel iron after slag removal back to the induction furnace to control the temperature to 1580°C; pour the molten nickel iron from the induction furnace into the molten iron ladle, add 30Kg / t industrial soda ash with the iron flow to remove impurities in the nickel iron water, and obtain the first The molten nickel-iron that has been removed for the second time is slag-removed, and the molten nickel-iron after the slag removal is r...

Embodiment 3

[0057] Add ferronickel smelted by blast furnace method containing 3.9%C, 2.2%Si, 0.96%Mn, 0.093%P, 0.402%S, 6.23%Ni, 6.07%Cr into the induction furnace, heat and melt, and control the temperature to 1530℃ to obtain nickel For molten iron, add 200Kg / t of iron oxide scale into the molten iron ladle, pour the molten nickel iron in the induction furnace into the molten iron ladle to remove impurities to obtain the first impurity-removed nickel-iron molten iron, and remove the slag from the first impurity-removed nickel-iron molten iron. Pour the molten nickel iron after slag removal back to the induction furnace to control the temperature to 1620°C; pour the molten nickel iron from the induction furnace into the molten iron ladle, add 30Kg / t industrial soda ash with the iron flow to remove impurities in the nickel iron water, and obtain the first The molten nickel-iron that has been removed for the second time is slag-removed, and the molten nickel-iron after the slag removal is re...

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Abstract

The invention discloses a ferronickel refining process, and belongs to the technical field of metallurgy. The method comprises the following steps: taking ferronickel smelted through a blast furnace method or a submerged arc furnace method as a raw material and putting the ferronickel into an induction furnace to be smelted, and controlling the temperature of the induction furnace; adding oxidized scale into a ladle; pouring nickel molten iron into the ladle, and removing impurity elements of Si, Mn, P, C and Cr; Slagging off, returning the nickel molten iron to the induction furnace, and controlling the temperature of the induction furnace; pouring the molten nickel iron into the ladle, adding industrial soda ash along with the pouring process of the molten nickel iron, and removing impurity elements of Si and S; slagging off, returning the nickel molten iron to the induction furnace, controlling the temperature of the induction furnace, casting a nickel ingot or adjusting components, and directly pouring a casting. According to the ferronickel refining process, equipment investment does not need to be increased, the impurity elements of Si, Mn, P, S, C and Cr in ferronickel smelted through a blast furnace method or a submerged arc furnace method are effectively removed, the ferronickel refining process is economical, environmentally friendly, efficient and rapid, and the impurity elements can be directly used as a raw material of heat-resistant castings.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a ferronickel refining process. Background technique [0002] my country's nickel resources are relatively poor, most of which depend on imports. The relatively mature traditional nickel production process is to extract nickel metal from nickel sulfide, but due to the decreasing sulfide ore resources on the earth; the production of ferronickel from laterite nickel ore has gradually become the main form of primary nickel production. The process of extracting nickel metal from laterite nickel ore is mainly based on the large-scale production of pyrometallurgy. The main ferronickel production processes include blast furnace smelting and submerged arc furnace smelting. [0003] The process of blast furnace production of ferronickel is mainly: dry screening of ore (large crushing) → batching → sintering → sintering ore plus coke block and flux into the blast furnace for smelting →...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/00C21C1/02C21C1/04C21C1/08C21C7/00C21C7/04C21C7/064C21C7/068C22C33/04C22C33/08C22C37/08C22C37/10C22C38/02C22C38/04C22C38/40
CPCC21C1/00C21C1/02C21C1/04C21C1/08C21C7/0068C21C7/04C21C7/064C21C7/068C21C2007/0093C22C33/04C22C33/08C22C37/08C22C37/10C22C38/002C22C38/02C22C38/04C22C38/40
Inventor 陈健果晶晶
Owner 邢台德勤工矿工程有限公司
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