Efficient KR desulfurizer and preparation method and use method thereof

A desulfurizer and high-efficiency technology, applied in the metallurgical field, can solve the problem of not significantly improving the use efficiency of the desulfurizer, and achieve the effects of low cost, not easy to form lumps, and improved utilization rate

Pending Publication Date: 2021-10-08
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patents and articles improve the environmental protection or high efficiency of the desulfurizer by changing the ratio and process of the desulfurizer, but do not significantly improve the use efficiency of the desulfurizer

Method used

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  • Efficient KR desulfurizer and preparation method and use method thereof
  • Efficient KR desulfurizer and preparation method and use method thereof
  • Efficient KR desulfurizer and preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method of high-efficiency KR desulfurizer, specifically:

[0044] Mix CaO powder: aluminum-containing powder at a mass ratio of 85:15, and the CaO mass content in the CaO powder is ≥ 95%; the particle diameter of the CaO powder is ≤ 1mm; the particle diameter of the aluminum-containing powder is 200 Mesh (74μm); the aluminum-containing powder contains the following mass percentage components: Al 2 o 3 : 50%-60%, TAl: 15%-25%, MgO+SiO 2 : ≤35%.

[0045] The components of the mixed environment-friendly high-efficiency KR desulfurizer are shown in Table 1, and there are no unavoidable impurities in Table 1. In the high-efficiency KR desulfurizer powder, particles below 200 mesh (74 μm) account for more than 30%, and the size of the rest of the particles is less than 1000 μm.

[0046] Table 1 Composition of high-efficiency KR desulfurizer

[0047]

[0048] The method of using the above-mentioned high-efficiency KR desulfurizer is as follows:

[0049] Mi...

Embodiment 2

[0052] A preparation method of high-efficiency KR desulfurizer, specifically:

[0053] Mix CaO powder: aluminum-containing powder at a mass ratio of 83:17, the CaO mass content in the CaO powder is ≥ 95%; the particle size of the CaO powder is ≤ 1mm; the particle size of the aluminum-containing powder is 200 mesh (74μm); The aluminum-containing powder comprises the following mass percentage composition: Al 2 o 3 : 50%-60%, TAl: 15%-25%, MgO+SiO 2 : ≤35%.

[0054] The components of the mixed environment-friendly high-efficiency KR desulfurizer are shown in Table 2, and there are no unavoidable impurities in Table 2. In the high-efficiency KR desulfurizer powder, particles below 200 mesh (74 μm) account for more than 30%, and the size of the rest of the particles is less than 1000 μm.

[0055] Table 2 Composition of high-efficiency KR desulfurizer

[0056]

[0057] The method of using the above-mentioned high-efficiency KR desulfurizer is as follows:

[0058] Mix the hi...

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Abstract

The invention provides a high-efficiency KR desulfurizer as well as a preparation method and a use method thereof. The high-efficiency KR desulfurizer comprises the following components: CaO powder and aluminum-containing powder in a mass ratio of (8-9): (2-1). Compared with the prior art, the preparation method changes the proportion of powder in the lime desulfurizing agent and increases part of aluminum-containing powder; therefore, the reaction activity of lime in molten iron is improved, the reaction area of the lime and the molten iron is increased, and the desulfurization efficiency is improved; and CaF2 in the desulfurizing agent is removed such that fluorine pollution generated by desulfurization residues is avoided, and the using effect of the desulfurizing agent is not reduced; in addition, the method is simple in product material, easy to implement and low in cost. By adopting the desulfurizing agent disclosed by the invention, the desulfurization rate can stably reach 93% or above, and the content of S in molten iron subjected to desulfurization treatment can be stably controlled to be less than or equal to 0.001%.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a high-efficiency KR desulfurizer, a preparation method and a use method thereof. Background technique [0002] At present, there are mainly four types of powders used in the hot metal pretreatment desulfurization process of major domestic steel plants, namely lime-based, calcium carbide-based, soda-based, and magnesium-based. It is cheap and has good desulfurization effect, so it is widely used in China. [0003] At present, the KR desulfurization process mainly used in the desulfurization of major steel plants, its conventional desulfurizer CaO+CaF 2 Composition of the mixture, where CaF 2 The composition content of the desulfurizer is about 10%-20%. The desulfurization rate of the desulfurizer composed of this composition is about 90%, but there are certain fluctuations in the desulfurization rate. , affecting its desulfurization rate. CaF in desulfurizer 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/02C21C7/064
CPCC21C1/025C21C7/0645
Inventor 潘晓亮邓勇沈昶舒宏富熊磊夏序河
Owner MAANSHAN IRON & STEEL CO LTD
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