Nickel-containing steel production process

A production process and technology for nickel steel, applied in the field of nickel-containing steel production process, can solve the problems of limited cost reduction and lack of good optimization, and achieve the effect of saving a lot of raw materials, optimizing production process, and improving production efficiency

Inactive Publication Date: 2017-01-04
姜蕾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To a certain extent, this invention is beneficial to reduce the cost of smelting steels with a nickel content of 0.10-0.50%, and effectively reduces the dependence on high-priced alloy resources such as electrolytic nickel or ferronickel when the converter produces nickel-containing steel. However, the invention The invention only reflects the reuse of low-nickel pig iron and scrap steel in terms of raw materials, and still needs to blow oxygen and add lime to adjust the alkalinity in the process, without better optimization, so that the degree of cost reduction is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Taking the preparation of nickel-containing steel with a nickel content of 0.2% as an example, the production process of this nickel-containing steel includes the following steps:

[0028] (1) Preparation of molten iron

[0029] Obtain 4 tons of molten iron at a temperature of 1470°C in a blast furnace;

[0030] (2) Transfer molten iron

[0031] Add the molten iron obtained in step (1) into the electric furnace with a ladle;

[0032] (3) Add laterite nickel ore

[0033] Adding nickel content to the electric furnace described in step (2) is 2% lateritic nickel ore 400kg, making it fully contact with molten iron;

[0034] (4) Smelting

[0035] The molten iron and laterite nickel ore in step (3) were heated to 1550°C and kept at 1550°C for 10 minutes.

[0036] In the above-mentioned embodiment:

[0037] In the step (1), the mass percent content of the components of the obtained molten iron is: 2.7% Si, 4.1% C, and the balance is Fe;

[0038] In the step (3), the par...

Embodiment 2

[0043] Taking the preparation of nickel-containing steel with a nickel content of 0.2% as an example, the production process steps of this nickel-containing steel are the same as in Example 1, except that in the step (3), the added laterite nickel ore is pre-reduced nickel-containing minerals; the steps of carrying out pre-reduction treatment on lateritic nickel ore are:

[0044] (3.1) After pulverizing the laterite nickel ore and mixing it with a reducing agent, the particle size of the prepared mixture is 20mm-150mm;

[0045] (3.2) Roast the obtained mixture at 650°C for 3h;

[0046] Wherein, the reducing agent is carbon powder, and the mass of carbon contained in the reducing agent is 5% of the mass of nickel in the nickel-containing mineral.

[0047] In the above examples, through the pre-reduction treatment of the lateritic nickel ore, the nickel oxide contained in it is partially reduced, and some chemical bonds are in different degrees of activation, so that after cont...

Embodiment 3

[0050] Taking the nickel-containing steel with a nickel content of 0.2% as an example, the production process steps of this nickel-containing steel are the same as in Example 1, except that:

[0051] In step (1), obtain 4 tons of molten iron at a temperature of 1400°C in a blast furnace;

[0052]In step (4), the laterite nickel ore and molten iron in step (3) are heated to 1400° C. and kept at 1400° C. for 8 minutes.

[0053] In the above-mentioned embodiment:

[0054] In the step (1), the mass percent content of the components of the obtained molten iron is: 2.0% Si, 3.6% C, and the balance is Fe;

[0055] In the step (3), the particle size of the laterite nickel ore is 40 mm to 60 mm;

[0056] In the step (4), the heating rate of the mixture of nickel-containing mineral and molten iron is 10°C / min.

[0057] The nickel content in the nickel-containing steel obtained by the above nickel-containing steel production process is 0.186%, and the nickel yield is 93%.

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Abstract

The invention relates to a nickel-containing steel production process which comprises the following steps: preparing liquid iron at the temperature of 1,400 to 1,520 DEG C in a blast furnace, transferring the liquid iron into a converter or an electric furnace, adding a nickel-containing mineral into the converter or the electric furnace to enable the nickel-containing mineral to be in contact with the liquid iron, and heating the nickel-containing mineral and the liquid iron to 1,400 to 1,600 DEG C for smelting. According to the nickel-containing steel production process, the conventional nickel-containing steel production process is fully optimized, and the smelting and production procedures for ferro-nickel and metal nickel are eliminated; the nickel-containing mineral replaces a ferro-nickel alloy and the metal nickel, so that the nickel yield is guaranteed, and the production cost is substantially reduced; therefore, the production efficiency is improved, the economical investment is reduced, and a large quantity of raw materials are saved; and the nickel-containing steel production process is suitable for being popularized and applied to the relevant field of nickel-containing steel smelting.

Description

technical field [0001] The invention relates to an alloy steel smelting method, in particular to a nickel-containing steel production process. Background technique [0002] At present, metal nickel is generally valued in the production of steel smelting, especially the production of stainless steel and advanced alloy steel. ) → adding alloy → go to LF furnace or RH or other refining equipment to fine-tune the composition → continuous casting → rolling → finished steel) in the converter or electric furnace stage for alloying treatment, that is, adding metal nickel or nickel-iron alloy in the converter or electric furnace to achieve In this process, a large amount of metal nickel or nickel-iron alloy is consumed, and some nickel-containing steel production processes are directly smelted by adding electrolytic nickel to the steelmaking furnace. Among them, although electrolytic nickel The purity is high, but the cost of the production process is high, and in the existing proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C5/52C22C33/04
CPCY02P10/20
Inventor 姜蕾
Owner 姜蕾
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