Method for producing magnesium olivine iron pellet

A technology for forsterite and a production method, which is applied in the field of production of forsterite iron ore pellets, can solve the problems of poor reduction, carry-in, influence and the like, and achieves the advantages of reducing activity, increasing reflow temperature, and reducing coke ratio. Effect

Inactive Publication Date: 2006-03-29
YICHANG KEBO OLIVINE
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Problems solved by technology

Most pelletizing plants use bentonite as a binder. Although it is an effective binder and can be used as a moisture control agent in the pelletizing process, it brings in alkali metals and other impurities, which

Method used

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  • Method for producing magnesium olivine iron pellet

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Experimental program
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Effect test

Embodiment Construction

[0016] The production method of forsterite iron ore pellet of the present invention, its basic steps are as follows:

[0017] Raw material ratio one: using modified bentonite as binder

[0018] Iron concentrate Forsterite powder Modified bentonite

[0019] 95Kg 2Kg 1.5Kg

[0020] 96Kg 2.5Kg 1.75Kg

[0021] 97Kg 3Kg 2Kg

[0022] Raw material ratio 2: use wkd as binder

[0023] Iron Concentrate Forsterite Powder wkd

[0024] 95Kg 2Kg 0.3Kg

[0025] 96Kg 2.5Kg 0.4Kg

[0026] 97Kg 3Kg 0.5Kg

[0027] (1) Physical and chemical performance testing of raw materials

[0028] 1. Determination of chemical composition of raw materials: test according to national standards.

[0029] 2. Determination of particle size of raw materials: The particle size determination of iron-containing raw materials is determined by a combination of dry and wet methods. First weigh 200 grams of iron ore concentrate, use a 320-mesh sieve to carry out wet sieving, dry and weigh the sieve, and then us...

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Abstract

A process for preparing the forsterite-type iron ore ball includes such steps as proportionally mixing the powder of forsterite containing MgO (more than 43%) with bentone or wkd, grinding, spheroidizing, drying and calcining. It can increase the flowability of slog and the soft heat temp of burden, and decrease soft heat band, drop band, SiO2 activity and coke rate.

Description

technical field [0001] The invention relates to a production method of iron ore pellets, in particular to a production method of producing forsterite iron ore pellets by adding forsterite powder. Background technique [0002] With the continuous development of the iron and steel industry, the blast furnace urgently needs a reasonable charge structure, and an increase in the proportion of pellets is considered to be an ideal charge structure for the blast furnace. Therefore, in recent years, many qualified domestic enterprises have used their own iron ore concentrates to produce pellets. The production of pellets in my country has been rising all the way, but most of them only produce pure acid pellets, that is, the production of pellets is basically controlled at natural alkalinity, and no limestone, dolomite or olivine is added in the production process , and the iron grade is low, the metallurgical properties of the pellets are affected to a certain extent. [0003] There...

Claims

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Application Information

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IPC IPC(8): C22B1/14
Inventor 张一敏汪盛明程铁军张小东刘涛汪光银
Owner YICHANG KEBO OLIVINE
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