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Efficient desulfurizer and preparation and use methods thereof

A desulfurization agent and high-efficiency technology, applied in the field of metallurgical desulfurization, can solve the problems of low utilization rate of pure magnesium, and achieve the effects of desulfurization, increase of alkalinity, and increase of desulfurization capacity

Active Publication Date: 2021-06-18
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a high-efficiency desulfurizer and its preparation and use methods. Aiming at the shortcomings of existing magnesium-based desulfurizers, it is proposed to use magnesium nitride as a raw material and add a reaction accelerator, which not only solves the problem of low utilization rate of pure magnesium problems, but also significantly improved the desulfurization efficiency

Method used

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  • Efficient desulfurizer and preparation and use methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Weigh raw materials according to the following percentage by weight: Mg 3 N 2 22%, CaO 52%, carboxymethyl cellulose 2% (binder), and the rest is iron powder.

[0038] 2) Mg 3 N 2 and CaO were put into the crusher for crushing, Mg 3 N 2 and CaO are broken into particles with a particle size of less than 0.1mm.

[0039] 3) To prevent Mg 3 N 2 and CaO reduce the activity due to water absorption, using silicone oil for Mg 3 N 2 Spray treatment with CaO particles to form a protective film.

[0040] 4) Mg 3 N 2 , CaO, iron powder, and binder are mechanically mixed in a mixer. The mixing time was 2.5 hours.

[0041] 5) The ball is pressed by a roller press. The pressure of the roller press is 600Kg / cm 2 , the spherical particle size is 10mm.

[0042] 6) The selected products are dried, packaged and ready for use. The drying temperature is 130° C., and the drying time is 2 hours.

Embodiment 2

[0044] 1) Weigh raw materials according to the following percentage by weight: Mg 3 N 2 25%, CaO 42%, carboxymethyl cellulose 2.3% (binder), and the rest is iron powder.

[0045] 2) Mg 3 N 2 and CaO were put into the crusher for crushing, Mg 3 N 2 and CaO are broken into particles with a particle size of less than 0.1mm.

[0046] 3) To prevent Mg 3 N 2 and CaO reduce the activity due to water absorption, using silicone oil for Mg 3 N 2 Spray treatment with CaO particles to form a protective film.

[0047] 4) Mg 3 N 2 , CaO, iron powder, and binder are mechanically mixed in a mixer. The mixing time was 2.6 hours.

[0048] 5) The ball is pressed by a roller press. The pressure of the roller press is 610Kg / cm 2 , The spherical particle size is 15mm.

[0049] 6) The selected products are dried, packaged and ready for use. The drying temperature is 135° C., and the drying time is 2.2 hours.

Embodiment 3

[0051] 1) Weigh out the following raw materials by the following weight percentages: Mg 3 N 2 27%, CaO 40%, carboxymethyl cellulose 3% (binder), and the rest is iron powder.

[0052] 2) Mg 3 N 2 and CaO were put into the crusher for crushing, Mg 3 N 2 and CaO are broken into particles with a particle size of less than 0.1mm.

[0053] 3) To prevent Mg 3 N 2 and CaO reduce the activity due to water absorption, using silicone oil for Mg 3 N 2 Spray treatment with CaO particles to form a protective film.

[0054] 4) Mg 3 N 2 , CaO, iron powder, and binder are mechanically mixed in a mixer. The mixing time was 2.6 hours.

[0055] 5) The ball is pressed by a roller press. The pressure of the roller press is 650Kg / cm 2 , the spherical particle size is 20mm.

[0056] 6) The selected products are dried, packaged and ready for use. The drying temperature is 140° C., and the drying time is 2.8 hours.

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Abstract

The invention discloses an efficient desulfurizer and preparation and use methods thereof. The desulfurizer is prepared from the following raw materials in percentage by weight: 20-30% of Mg3N2, 40-55% of CaO, 1-4% of a binder and the balance iron. Aiming at the defects of the existing magnesium-based desulfurizer, the invention provides the efficient desulfurizer which is prepared from magnesium nitride as a raw material and a reaction promoter, so that the problem of low utilization rate of pure magnesium is solved, and the desulfurization efficiency is remarkably improved. Therefore, the desulfurizer has the advantages of convenience in use, high utilization rate, high desulfurization efficiency and the like.

Description

technical field [0001] The invention relates to metallurgical desulfurization technology, in particular to a high-efficiency desulfurizer and its preparation and use methods. Background technique [0002] With the development of engineering technology, the requirements for the performance of steel are getting higher and higher. Usually, sulfur in steel is a harmful element. If it cannot be effectively removed during the smelting process, it will seriously restrict the performance of steel. Therefore, in the steel smelting process of industrial production and scientific research, a certain amount of desulfurizer is usually added in the molten steel refining process to remove sulfur. [0003] There are many types of desulfurizers, usually calcium oxide and fluorite are used to prepare desulfurizers. In addition, because calcium aluminate has the characteristics of low melting point, high sulfur capacity and easy storage, calcium aluminate is widely used as a desulfurizer in st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
CPCC21C7/0645
Inventor 尚德礼廖相巍康磊吕春风常桂华康伟李广帮刘志明
Owner ANGANG STEEL CO LTD
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