Method for making fluxed iron ore powder composite pellet

A production method and technology of composite pellets are applied in the field of production of flux-based iron ore powder composite pellets, which can solve problems such as unformed production processes, and achieve the effects of being beneficial to increasing blast furnace production, saving energy consumption and reducing investment.

Inactive Publication Date: 2006-07-19
许贵宾
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Problems solved by technology

However, this flux-based pellet has n

Method used

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  • Method for making fluxed iron ore powder composite pellet
  • Method for making fluxed iron ore powder composite pellet

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0050] The invention relates to a production method of flux-based iron ore powder composite pellets, which adopts multiple pelletizing methods to produce single-ball double-alkalinity composite flux-based pellets, that is, in the first pelletizing process, according to the production Required binary alkalinity (CaO / SiO 2 ) requirements, so that the green balls contain an appropriate amount of CaO and MgO, and then carry out the second ball making, and evenly coat the outer layer of the green ball surface with limestone powder, dolomite powder, hematite dry powder or low-Si acidic iron concentrate powder Anti-adhesion layer, etc., and then use the baking temperature and baking method of the acidic pellets to bake to ensure that the pellets do not bond.

[0051] Th...

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Abstract

The preparation method for a solvent-type iron ore composite aggregate comprises: ensuring the proper CaO and 2-4% MgO with weight o.5-2.0 in the first process; then coming the secondary time, wrapping one block layer evenly of CaCo3 powder, dolomite powder, hematite dried powder or acidic iron concentrate ore; then, baking as the acidic aggregate baking temperature and means to ensure the ore not bond. This invention overcomes bonding problem with low cost and little pollution, and improves blast furnace yield even meets the pH balance or desulfurization request.

Description

technical field [0001] The present invention relates to a production method of flux-based iron ore powder composite pellets, more precisely, relates to a flux-based iron ore powder composite ball that can better solve the bonding problem of flux-based pellets in the roasting process The invention discloses a method for producing dough; it belongs to the technical field of charge preparation in the ironmaking process. Background technique [0002] At present, the production technology of ironmaking furnace materials in my country is not optimistic. The ironmaking raw materials of various iron and steel plants are basically high-basic sinter with a small amount of acid pellets. Taking 2003 as an example, sintered ore accounted for more than 80%, and pellet ore accounted for only about 12%. The proportion of pellets in most steel plants has not exceeded 30%. Compared with sinter, pellets have many advantages such as high grade, uniform particle size, high strength, less powde...

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Application Information

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IPC IPC(8): C22B1/14
Inventor 许贵宾
Owner 许贵宾
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