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Sponge iron processing technology

A processing technology and technology of sponge iron, applied in the field of sponge iron, can solve problems such as environmental pollution, occupying a large vacant space, and failure to recycle and recycle, and achieve the effect of saving precious resources and reducing production costs

Inactive Publication Date: 2013-09-04
江苏三志电器有限公司
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  • Application Information

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Problems solved by technology

On the other hand, the by-products such as flue ash, lamination, and iron scale produced during the production of stainless steel in my country have been piled up and discarded in large quantities because there is no suitable recycling method so far, and cannot be recycled and reused.
Pile up and discard these wastes, not only need to occupy a lot of free space, but also cause serious environmental pollution
Especially since these wastes contain about 1 to 4% of the precious metal nickel, as well as many other elements such as chromium, titanium, manganese, molybdenum, copper, niobium, phosphorus, etc., and these elements are used in the smelting of stainless steel If the elements that need to be added are discarded directly and not recycled, it will inevitably cause great waste

Method used

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Embodiment Construction

[0011] A processing technology of sponge iron, the main components include the following components (expressed in wt.%): 1.1-3.6% aluminum, 0.9-1% copper, 0.35-0.4% silicon, 1-1.2% manganese, 0.025% sulfur ~0.035%, phosphorus 0.025~0.035%, nickel 1.1~2.2%, chromium 1.1~3%, molybdenum 1.1~1.2%, tungsten 0.85~1.1%, yttrium 0.01~1.1%, and the balance is scrap iron.

[0012] A kind of processing technique of sponge iron of the present invention comprises the following steps:

[0013] 1) Take the above components as raw materials, mix them with coal coke powder according to the weight ratio of 100:5~15, put them into an extruder and extrude them to make a rough billet.

[0014] 2) Put the rough billet into the reducing tank, and then add a reducing agent accounting for 15-30% of the rough billet weight. The reducing agent is made by mixing coal coke powder and desulfurizing agent in a weight ratio of 3-6:1, and the desulfurizing agent can be limestone or dolomite.

[0015] 3) Br...

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PUM

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Abstract

The invention discloses a sponge iron processing technology. The sponge iron processing technology comprises the following components by weight: 1.1-3.6% aluminium, 0.9-1% copper, 0.35-0.4% silicon, 1-1.2% manganese, 0.025-0.035% sulfur, 0.025-0.035% phosphorus, 1.1-2.2% nickel, 1.1-3% chromium, 1.1-1.2% molybdenum, 0.85-1.1% tungsten, 0.01-1.1% illinium, and the balance of scrap iron. According to the invention, wastes generated in stainless steel smelting are used as raw materials to produce sponge iron containing nickel, so that wastes like flue dust, layered mud and iron scale can be recycled for reuse, and are converted into available resources, a great amount of precious resources are saved, and the manufacture cost of stainless steel is remarkably reduced.

Description

technical field [0001] The present invention relates to sponge iron in iron and steel smelting, in particular to a kind of sponge iron containing nickel. [0002] And the processing technology of this nickel-containing sponge iron. Background technique [0003] Nickel is an excellent corrosion-resistant material and an important alloying element in alloy steel. Due to the small reserves of nickel in the world and concentrated distribution in a few regions, the supply and demand of nickel are tight worldwide. On the other hand, the by-products such as flue ash, lamination, and iron scale produced during the production of stainless steel in our country have been piled up and discarded in large quantities because there is no suitable recovery method so far, and they cannot be recycled and reused. Pile up and discard these wastes, not only need to occupy a lot of free space, but also cause serious environmental pollution. Especially since these wastes contain about 1 to 4% of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/04C22C38/44
CPCY02P10/20
Inventor 徐策
Owner 江苏三志电器有限公司
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