Equipment for producing oxidized pellet and method for producing oxidized pellet by using the same

A technology for oxidizing pellets and equipment, which is applied in the field of equipment for producing oxidizing pellets for blast furnace ironmaking, can solve the problems of high addition of bentonite and excessive decrease in the iron content of the pellets, and achieves the effect of improving the iron content

Inactive Publication Date: 2009-06-17
范英俊
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an equipment for producing oxidized pellets and a method for producing oxidized pellets by using the equipment, so as to solve the problem that the amount of bentonite added in the prior art is too high when the oxidized pellets are prepared, and the pellets contain iron. The problem of too much taste loss

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  • Equipment for producing oxidized pellet and method for producing oxidized pellet by using the same
  • Equipment for producing oxidized pellet and method for producing oxidized pellet by using the same
  • Equipment for producing oxidized pellet and method for producing oxidized pellet by using the same

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Embodiment Construction

[0034] figure 2 The structural diagram of the equipment for producing oxidized pellets for the present invention, such as figure 2 As shown, the present invention changes the traditional grate-rotary kiln production equipment for the production of oxidized pellets in the rotary kiln, uses hematite powder for iron and steel production oxidized pellets, and provides a medium-speed grinding-grit- The new production equipment for the production of oxidized pellets by the rotary kiln is added between the ingredients and the pelletizing device of the traditional grate-rotary kiln production device for the production of oxidized pellets by the rotary kiln for crushing, drying, Grinding device for wind selection (powerful medium-speed grinding) and material collection device after grinding (bag powder collector). The ore powder collected by the bag powder collector enters the disc pelletizer through the feeding device, and sprays the converter dust mud into the disc pelletizer thro...

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Abstract

The invention provides a device for producing oxidized pellets and a method for producing the oxidized pellets using the device. The device provides a new production plant used in a medium speed pulverizing-drying grate-rotary kiln for producing the oxidized pellets based on a traditional drying grate-rotary kiln. The method is added with a step of grinding a mixture of mineral powder and bentonite in a hot air condition based on a traditional process, dust slurry is sprayed during pelletizing to produce wet pellets, then the wet pellets is delivered to a drying grate-rotary kiln device for roasting, and then cooled. In the device and the method, over 80% of mineral powder is minums 200 meshes (0.074mm) fine powder after medium-speed pulverizing; a little converter dust slurry is sprayed during palletizing in a disc pelletizer so as to causes the addition amount of bentonite to be only 1.0-1.5% which is only the 1 / 2-1 / 4 of the common amount of domestic enterprises, thus effectively improving the iron grade of the pellets with the compressive strength of the final pellets larger than 2200N / P.

Description

technical field [0001] The invention relates to the field of ferrous metallurgy, in particular to equipment for producing oxidized pellets for blast furnace ironmaking and a method for producing oxidized pellets using the equipment. Background technique [0002] Pellets are an important raw material for iron and steel production. They not only have the advantages of high grade, strength, good reducibility, and uniform particle size, but also the combination of acidic pellets and high-basicity roasted ore can constitute a reasonable charge structure for blast furnaces. Blast furnace ironmaking achieves the purpose of increasing production, saving coke and improving economic benefits. [0003] At present, there are three production methods of pellets at home and abroad: (1) shaft furnace roasting method; (2) belt roasting method; (2) chain grate-rotary kiln roasting method. my country's pellet production started late, and the grate-rotary kiln roasting method began in the 198...

Claims

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Application Information

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IPC IPC(8): C22B1/14
Inventor 范英俊
Owner 范英俊
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