Chromite oxide pellet and preparation method thereof

A technology for oxidizing pellets and chromite, which is applied in the field of chromite oxidizing pellets and its preparation, can solve the problems of poor high-temperature smelting performance and low strength, and achieves the effect of good spheroidization

Active Publication Date: 2013-12-25
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

[0004] The purpose of the present invention is to provide a chromite oxide pellet and its preparation method to solve the problems of p

Method used

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  • Chromite oxide pellet and preparation method thereof
  • Chromite oxide pellet and preparation method thereof
  • Chromite oxide pellet and preparation method thereof

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with drawings and embodiments.

[0028] Such as figure 1 Shown, the preparation method of chromite oxide pellets is as follows:

[0029] S1: Add 1% to 2% of bentonite, 1% to 2% of metallurgical coke powder and 0.5% to 2% of dolomite to the chromium-containing raw material and mix thoroughly to obtain a mixture. Preferably, the bentonite is sodium bentonite.

[0030] S2: Grind the mixture into fine powder, wherein the powder with a particle size of 200 mesh accounts for 80%±2% of the total fine powder volume, and pelletize to obtain green pellets.

[0031] S3: The raw balls are dried at a temperature of 450-600° C. for 5-10 minutes to obtain dry balls.

[0032] S4: Preheating the dry bulbs at a temperature of 1150-1250° C. for 5-10 minutes to obtain preheated bulbs.

[0033] S5: The preheated balls are roasted at a temperature of 1300-1350° C. for 5-10 minutes to obtain roasted balls.

[0034] S6: So...

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Abstract

The invention discloses a chromite oxide pellet. Raw materials of the chromite oxide pellet comprise 40-60wt% of first chromite, 10-15wt% of second chromite, 25-50wt% of third chromite, 1-2wt% of bentonite, 1-2wt% of metallurgical coke powder and 0.5-2wt% of dolomite. The invention also discloses a preparation method of the chromite oxide pellet. The prepared chromite oxide pellet has a good ballability, a high strength and an excellent smelting performance.

Description

technical field [0001] The invention relates to the technical field of chromite mineral agglomeration, in particular to a chromite oxide pellet and a preparation method thereof. Background technique [0002] Chromium is a strategically important metal that always coexists with iron in nature to form ferrochrome spinel (FeO Cr 2 o 3 ), and its mineralogical name is chromite (David, Shuli. Ferroalloy Metallurgical Engineering, Beijing: Metallurgical Industry Press, 1999, 92:121~122). In the metallurgical industry, chromite ore is mainly used to produce ferrochrome alloy and metallic chromium. Ferrochrome alloy is used as a steelmaking additive to produce a variety of high-strength, corrosion-resistant, and oxidation-resistant special steels, and is widely used in aviation, automobiles, shipbuilding, and military industries. With the development of stainless steel products, the metallurgical industry's demand for chromite will also increase (Liu Yuangen. Conference on Ration...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B1/16C22B34/32
Inventor 付国伟邬虎林吕志义白晓光沈茂森张永李玉柱刘周利赵永红
Owner INNER MONGOLIA BAOTOU STEEL UNION
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