Pellet ore magnesium-based composite binder as well as preparation method and application method thereof

A technology of pellets and binders, applied in the field of sintered pellet preparation, to achieve the effects of improving the metallurgical properties of pellets, relieving pressure, and improving quality

Active Publication Date: 2020-01-24
ANGANG STEEL CO LTD
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Problems solved by technology

[0005] In the technical solutions disclosed in Chinese patents with patent numbers CN201410030925.0, CN201410481824.5, etc., bentonite is still used as a binder, which will sacrifice a certain iron grade when introduced into pellets, and does not really get rid of the dependence of pellets on bentonite

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  • Pellet ore magnesium-based composite binder as well as preparation method and application method thereof
  • Pellet ore magnesium-based composite binder as well as preparation method and application method thereof
  • Pellet ore magnesium-based composite binder as well as preparation method and application method thereof

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preparation example Construction

[0026] A preparation method of pellet magnesium-based composite binder, comprising the following steps:

[0027] 1) The magnesite tailings are roasted at medium temperature to obtain a composite of magnesium oxide and magnesium carbonate, the composite is crushed and ground into powder, weighed and put into a reaction vessel;

[0028] 2) The hydroxypropyl methylcellulose solution obtained after the etherification reaction of hydroxypropyl methylcellulose is directly added to the reaction vessel equipped with magnesium oxide and magnesium carbonate complex according to the dry basis ratio;

[0029] 3) The instant sodium carboxymethylcellulose solution is added to the reaction vessel equipped with magnesium oxide and magnesium carbonate complex according to the proportion on a dry basis;

[0030] 4) Place the reaction vessel in a microwave generator, and radiate and heat the heap leaching reaction for 10-20 minutes; after heating, the temperature is 100-110°C, and the dried prod...

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Abstract

The invention relates to a pellet ore magnesium-based composite binder as well as a preparation method and an application method thereof. The pellet ore magnesium-based composite binder comprises thefollowing components of, by dry-base weight, 97%-99% of calcined magnesite tailings, 0.5%-2.2% of hydroxypropyl methyl cellulose, and 0.5%-2.3% of instant sodium carboxymethylcellulose. According to the pellet ore magnesium-based composite binder as well as the preparation method and the application method thereof, the magnesite tailings are used as magnesium-containing raw materials, a compositebody of magnesium oxide and magnesium carbonate is obtained through medium-temperature roasting, an undehydrated and dried hydroxypropyl methyl cellulose solution and an instant sodium carboxymethylcellulose solution are added, and the pellet ore magnesium-based composite binder is obtained through microwave heating, stirring and depth fusion reaction, so that high-efficiency resourceful recyclingof the magnesite tailings is realized, the overall production process of the magnesium-based composite binder is simplified, the quality of pellets can be improved, and the production cost of an ironand steel combined enterprise is reduced.

Description

technical field [0001] The invention relates to the technical field of sintered pellet preparation, in particular to a magnesium-based composite binder for pellets and its preparation and use methods. Background technique [0002] Pellets are one of the main raw materials for blast furnace ironmaking. Binders are usually added in the production of pellets. The main function of adding binders is to reduce the amount of solvent added in the production of pellets, so as to ensure the roasting of pellets. process, and effectively restrain the decline of pellet grade. At present, the binder used in my country's pellets is still mainly bentonite, and the amount of high-quality bentonite added is 1.5% to 2.0%. Due to the high impurity content and large addition amount of bentonite, it is difficult to improve the pellet performance and iron grade. Therefore, the development and development of new high-efficiency and functional binders to replace bentonite or reduce the amount of b...

Claims

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Application Information

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IPC IPC(8): C22B1/242
CPCC22B1/242Y02P10/20
Inventor 李金莲朱建伟宫作岩张立国任伟韩子文王亮张伟王小强国泉峰
Owner ANGANG STEEL CO LTD
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