Pellet ore binding agent containing magnesium oxide and preparation and using method of pellet ore binding agent

A technology containing magnesium oxide and a binder, which is applied in the field of binders for metallurgical sintering, can solve the problems of pellet binder defects and sinter influence, and achieves improvement of metallurgical properties, reduction of MgO content, and sinter quality. and the effect of improving the quality of pellets

Inactive Publication Date: 2017-11-14
ANSTEEL GRP MINING CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pellet binder containing magnesia and its preparation and use method in order to solve the defect of the pellet binder in the prior art and the problem that the sinter is affected by MgO

Method used

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  • Pellet ore binding agent containing magnesium oxide and preparation and using method of pellet ore binding agent
  • Pellet ore binding agent containing magnesium oxide and preparation and using method of pellet ore binding agent
  • Pellet ore binding agent containing magnesium oxide and preparation and using method of pellet ore binding agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] The magnesium oxide pellet-containing binder of Examples 1 to 5 has components and weight percentages as shown in Table 1:

[0020] Table 1 Distribution ratio of each group

[0021]

[0022]

[0023] The components are mixed in proportion, and the finished product is obtained after co-grinding, and the particle size of the finished product is less than 0.044mm.

[0024] The magnesia-containing pellet binder finished products prepared in Examples 1 to 5 were respectively added to the iron ore concentrate powder to obtain 5 groups of green pellets; the performance index of the 5 groups of green pellets was the same as that obtained by conventionally adding bentonite. The performance indicators of the raw balls of the control group are compared in Table 2:

[0025] Table 2 Comparison Table of Raw Ball Indexes

[0026]

[0027] The above groups of green pellets are roasted to produce finished pellets;

[0028] Roasting technical parameters are shown in Table 3: ...

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Abstract

The object of the present invention is to provide a pellet binder containing magnesium oxide and its preparation and use method in order to solve the defect of the pellet binder in the prior art and the problem that the sinter is affected by MgO. It is composed of 0.035%-0.075% of organic high-viscosity materials and 99.925%-99.965% of magnesium raw materials. The organic high-viscosity materials are one or two of Tianqing gum and sodium humate, and the magnesium raw materials are those with magnesium oxide content ≥ 45%. Magnesite, the particle size is less than 0.044mm, and the mass percentage of magnesite is more than 95%. In this invention, magnesium raw material is used to replace bentonite, which can improve the quality of pellets, increase the strength and bursting temperature of green pellets, and improve the compressive strength and total iron content of finished pellets. At the same time, adding MgO to the pellets can not only improve the metallurgical properties of the pellets, but also reduce the MgO content in the sinter, so that the quality of the sinter and the pellets can be improved together.

Description

technical field [0001] The invention belongs to the technical field of binders for metallurgical sintering, in particular to a binder containing magnesium oxide pellets and a preparation and use method thereof. Background technique [0002] Ironmaking pellets have the advantages of good metallurgical properties and improved air permeability of the blast furnace charge column, and are considered to be a high-quality charge for optimizing the structure of the blast furnace charge. In order to meet the requirements of the iron concentrate production pellet process and blast furnace smelting on the chemical composition, strength and metallurgical properties of the charge, it is necessary to add a certain amount of binder to the pellet charge. At present, the most widely used binder is bentonite, including calcium bentonite, sodium bentonite and artificial sodium bentonite. The main component of bentonite is SiO 2 and Al 2 o 3 , adding in the pellet feed will reduce the grade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242
CPCC22B1/242
Inventor 侯恩俭马文张松汪琦全利钱丽杰
Owner ANSTEEL GRP MINING CO LTD
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