Composite-coating granular magnesium desulfurizer

A composite coating and granular magnesium technology, applied in the field of molten iron desulfurizer, can solve the problems of low active magnesium content, short flame retardant time, poor fluidity, etc., achieve good flow performance, long flame retardant time, and reduce production costs.

Active Publication Date: 2013-06-05
营口东邦环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] A large number of engineering tests have shown that the existing magnesium-based desulfurizers still have the characteristics of surface relaxation, low active magnesium content, short flame-retardant time, and poor fluidity. When spraying with a gasification chamber spray gun, sticking guns often occur. Occurrence of blocked guns and other phenomena

Method used

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  • Composite-coating granular magnesium desulfurizer
  • Composite-coating granular magnesium desulfurizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A composite coating granular magnesium desulfurizer, in weight percentage, comprises the following components:

[0036] Metallic Magnesium 92%;

[0037] Chlorine salt 5%;

[0038] Filler 3%.

[0039] The above chlorine salts are KCl, NaCl and CaCl 2 The mixture, the filler is CaF 2 And the mixture of CaOMgO, among them, KCl, NaCl and CaCl 2 The weight ratio of the metal particles is 1:3:4; the particle size of the magnesium metal particles is 0.5mm.

[0040] Preparation method: After mixing the above-mentioned chloride salt and filler according to the defined weight percentage, dissolve it in water at 100°C to form a liquid material, and then place it in a stirred tank filled with metal particle magnesium, and store it under the condition of 200°C-250°C Spray and stir, and finally dry at high temperature to obtain the target product.

Embodiment 2

[0042] A composite coating granular magnesium desulfurizer, in weight percentage, comprises the following components:

[0043] Metallic Magnesium 93%;

[0044] Chlorine salt 5%;

[0045] Filler 2%.

[0046] The above chlorine salts are KCl, NaCl and CaCl 2 The mixture, the filler is CaF 2 And the mixture of CaOMgO, among them, KCl, NaCl and CaCl 2 The weight ratio of the metal particles is 1:4:5; the particle size of the magnesium metal particles is 1.5 mm. The preparation method is the same as in Example 1.

Embodiment 3

[0048] A composite coating granular magnesium desulfurizer, in weight percentage, comprises the following components:

[0049] Magnesium in metallic particles 95%;

[0050] Chlorine 1%;

[0051] Filler 4%.

[0052] The above chlorine salts are KCl, NaCl and CaCl 2 The mixture, the filler is CaF 2 And the mixture of CaOMgO, among them, KCl, NaCl and CaCl 2 The weight ratio of the metal particles is 2:3:5; the particle size of the magnesium metal particles is 1.0 mm. The preparation method is the same as in Example 1.

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Abstract

The invention belongs to the field of molten iron desulfurizers in steel making industry, and particularly relates to a composite-coating granular magnesium desulfurizer which comprises the following components in percentage by weight: 90-95% of metallic granular magnesium, 1-8% of chloride and 2-10% of filler, wherein the chloride is a mixture of KCl, NaCl and CaCl2; the filler is one of CaF2 and CaOMgO, or the mixture thereof; the weight ratio of KCl to NaCl to CaCl2 is (1-10):(1-8):(1-5); and the granularity of the metallic granular magnesium is 0.5-1.6mm. The composite-coating granular magnesium desulfurizer has the advantages of uniform and compact surface, long flame-retardant time, favorable flowing property and environmental protection, does not stick to or plug the gun and does not splash in the spraying process of the spray gun with a gasification chamber, and is convenient to transport and store.

Description

technical field [0001] The invention belongs to the field of molten iron desulfurizers in the iron and steel smelting industry, and in particular relates to a composite coating granular magnesium desulfurizer. Background technique [0002] Hot metal desulfurization is a hot metal treatment technology developed in the 1970s, and it has become an important part of the optimization process of modern iron and steel enterprises. The main features of hot metal desulfurization are as follows: [0003] 1. The molten iron contains a large amount of reducing elements such as silicon, carbon and manganese. When using various desulfurization agents, the desulfurization agent has less burning loss and high utilization rate, which is beneficial to desulfurization. [0004] 2. Carbon and silicon in molten iron can greatly increase the activity coefficient of sulfur in molten iron, improve the thermodynamic conditions of desulfurization, and make it easier to desulfurize to a lower level. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064
Inventor 陈树村刘欣雨陈学新武允禄
Owner 营口东邦环保科技股份有限公司
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