Low-phosphorus low-sulphur nickel-containing pig iron and its preparation method

A technology of nickel pig iron and its manufacturing method, which is applied in the field of nickel pig iron and its manufacturing, can solve problems such as limitation and increase of work burden of steelmaking process, and achieve the effect of reducing production cost

Inactive Publication Date: 2014-07-09
CHAOYANG HONGXIANG ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] People have been devoting themselves to seeking substitutes for nickel for many years, but have not been successful so far; Utilizing local nickel-clay ore as a nickel source, because of its low grade and contained harmful impuriti

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Low-grade nickel sulfide ore with a nickel content of about 0.5% is selected as the nickel source. Nickel sulfide concentrate with sulfur0.6%, and impurity elements 1%, nickel-containing sulfuric acid slag concentrate containing more than 55% iron, and then mixed with the same amount of iron concentrate powder and coke powder solvent, etc., and then sintered to obtain nickel-iron mixed sinter. Smelted in a conventional blast furnace, the result is crude nickel-containing pig iron. The obtained nickel-containing pig iron is put into an electric arc furnace for refining to obtain low-phosphorus and low-sulfur nickel-containing pig iron with a nickel content of about 4-9% and phosphorus and sulfur respectively less than 0.05%.

Embodiment 2

[0019] The nickel oxide ore is sintered into sintered ore after beneficiation and crushing. The resulting sintered ore is smelted into a blast furnace to produce crude pig iron containing more than 4% nickel. The obtained above-mentioned crude pig iron is put into the electric arc furnace for refining as the only metal material, and after the carbon, phosphorus and sulfur are removed, a low-phosphorus and low-sulfur iron with a nickel content of about 4-9% and phosphorus and sulfur less than 0.05% respectively is obtained. Nickel pig iron.

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Abstract

The invention provides low phosphorus low-sulphur nickel-containing pig iron comprising less than 4.5% of C, 4.0-9.0% of Ni, less than 0.05% of S, less than 0.05% of P, less than 0.2% of impurity elements and the balance of Fe. The invention also provides a preparation method of the low phosphorus low-sulphur nickel-containing pig iron by use of a low grade nickel ore, and the method includes ore separation, crushing and sintering of the nickel ore, crude smelting in a blast furnace, refining in an electric arc furnace and other steps.

Description

technical field [0001] The invention relates to a low-phosphorus, low-sulfur nickel-containing pig iron and a manufacturing method thereof Background technique [0002] Nickel is an important alloying element in steel, and many structural steels and most stainless steels contain nickel. China has now become a major steel-producing country with a production capacity of more than 700 million tons per year, and consumes a large amount of nickel every year. However, China is a nickel-poor country, so it has to import a large amount of nickel every year. With the rise of the international nickel price in recent years, it has brought huge cost pressure to Chinese iron and steel enterprises. [0003] People have been devoting themselves to seeking substitutes for nickel for many years, but have not been successful so far; Utilizing local nickel-clay ore as a nickel source, because of its low grade and contained harmful impurities, such as phosphorus, sulfur, etc. are too high, us...

Claims

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Application Information

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IPC IPC(8): C22C38/60C22C38/08C22C33/04C21B11/10C22B1/16C21B5/02
Inventor 王宏林
Owner CHAOYANG HONGXIANG ADVANCED MATERIALS
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