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Iron ore pellet boron and magnesium composite bonder, and application and processing method of acid pellets

A binder and boron-magnesium technology, which is applied in the iron ore pellet boron-magnesium composite binder and iron concentrate powder to produce acid pellets, to achieve the effect of adding a reasonable proportion and increasing the MgO content

Active Publication Date: 2015-10-21
北京新佰奥科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, experimental studies have also proved that as long as the acid pellets increase the MgO content by 1%, the roasting temperature will exceed 1300 °C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present embodiment utilizes the abundant boron-mafic iron ore powder resources in Liaoyang, Liaoning Province, my country, that is, the by-product (boron mud) of producing borax, which contains B 2 O 3 It is 3%, and the MgO content is about 40%.

[0025] The required MgO content of the acid pellets in this example is 1%, according to the configuration ratio relationship of the components of the iron ore pellets boron-magnesium composite binder in the iron ore pellets: " The ratio of carboxymethyl cellulose is 0.05-0.5%", and the ratio relationship of the binder in this example is obtained, wherein 0.2% of carboxymethyl cellulose is added.

[0026] The prepared iron ore pellet boron-magnesium composite binder is white powder, and its particle size -200 mesh (-0.074mm) reaches more than 95%. When using, the mixing method is the same as mixing bentonite, and the binder can be poured into The silo, the electronic belt scale or the screw feeder is allocated to the bel...

Embodiment 2

[0029] The boron-magnesium compound in this embodiment is a mixture of boric acid and high magnesium oxide powder.

[0030] The MgO content required by the acidic pellets in this example is 1.5%, and the MgO content in the selected high MgO powder is 95wt%. ratio: The ratio of carboxymethyl cellulose is 0.05% to 0.5%", and the ratio of the binder in this example is obtained, wherein carboxymethyl cellulose is compounded in 0.15%.

[0031] The prepared iron ore pellet boron-magnesium composite binder is white powder, and its particle size -200 mesh (-0.074mm) reaches more than 95%. When using, the mixing method is the same as mixing bentonite, and the binder can be poured into The silo, the electronic belt scale or the screw feeder is allocated to the belt, and the proportion of the proportion can be set first and then adjusted until it meets the requirements of the proportion of the proportion.

[0032] In this example, when the MgO content is increased to 1.5%, the blast...

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Abstract

The invention provides an iron ore pellet boron and magnesium composite bonder, and application and a processing method of acid pellets. The bonder is in two types. According to one type, boron and magnesium iron ore powder resources rich in China are utilized, boron and magnesium iron ore powder with the B2O3 content being 3% or so and the MgO content being 40-50% or so are selected and mixed with 1-5% of carboxymethyl cellulose so that the boron and magnesium composite bonder can be obtained, According to the other type, MgO powder and B2O3 mixtures and carboxymethyl cellulose are compounded, the iron ore pellet boron and magnesium composite bonder is obtained, the content of MgO and the content of B2O3 are the same as those of the first type, and the MgO contained acid pellets are produced. By means of the bonder, the content of MgO in the acid pellets can be improved by 1-2.5%, the content of B2O3 in the acid pellets can be improved by 0.05-0.10%, the bonder can serve as a powdered iron pelletizing bonder and can also serve as acid pellet production additives, the content of the MgO is increased, the sintering temperature of the MgO acid pellets is not raised, and the purpose of producing the MgO contained acid pellets is achieved.

Description

technical field [0001] The invention relates to a binder for iron ore pellets, in particular to a boron-magnesium composite binder for iron ore pellets and uses thereof, belonging to the field of metallurgy, and is particularly suitable for the process of producing acid pellets from iron fine powder. Background technique [0002] In recent decades, my country's blast furnace ironmaking has gradually formed a charge structure with high basicity sinter and acid pellets as the main charge structure. Acid pellets have the advantages of high grade and low slag content. However, due to the deviation of the reflow performance of the acid pellets, the permeability and smelting effect of the lower part of the blast furnace are affected to varying degrees. Therefore, in recent years, domestic and foreign pellet production has been pursuing MgO acid pellets to improve their reflow properties. [0003] Experimental studies have shown that MgO can significantly improve the reflow prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242
Inventor 许满兴陈海勇张玉兰王硕
Owner 北京新佰奥科技有限公司
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