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Desulfurizing agent for pipeline steel smelting

A desulfurizer and pipeline steel technology, applied in the field of iron and steel metallurgical auxiliary materials, can solve the problems of increasing the amount of slag in molten iron, side effects of molten iron, nozzle blockage, etc., and achieve the effects of increasing adsorption performance, preventing resulfurization, and increasing desulfurization reaction speed

Inactive Publication Date: 2014-05-14
WUXI CHENGBO SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material of the hydrophobic layer used in this method will have a side effect on the molten iron, increasing the amount of slag in the molten iron, and its flame-retardant layer covering and the surface of the hydrophobic layer are easy to fall off during transportation, and it is easy to cause nozzle clogging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A desulfurizer for pipeline steel smelting, the desulfurizer is composed of the following components in parts by weight: 70 parts of rare earth passivated magnesium composite material, 12 parts of calcium fluoride, 5 parts of barium carbonate, 18 parts of attapulgite, wherein The rare earth passivated magnesium composite material comprises 60 parts of Mg, 5 parts of CeO, and 15 parts of MgO; the preparation method of the rare earth passivated magnesium composite material is as follows: Mg, CeO and MgO are first dry mixed to make a mixture, and then The mixture is heated, the temperature is controlled at 60°C, and then oxalic acid, magnesium chloride and water are mixed to form a passivation solution, and then the passivation solution is poured into the mixture, stirred until the material is dry, and the rare earth passivation is obtained after natural cooling. Magnesium composite material, wherein the weight ratio of the passivating agent oxalic acid and magnesium chlori...

Embodiment 2

[0016] A desulfurizer for pipeline steel smelting, the desulfurizer is composed of the following components in parts by weight: 80 parts of rare earth passivated magnesium composite material, 10 parts of calcium fluoride, 8 parts of barium carbonate, 15 parts of attapulgite, wherein The rare earth passivated magnesium composite material comprises 70 parts of Mg, 3 parts of CeO, and 25 parts of MgO; the preparation method of the rare earth passivated magnesium composite material is as follows: Mg, CeO and MgO are first dry mixed to make a mixture, and then Heat the mixture and control the temperature at 70°C, then mix oxalic acid, magnesium chloride and water to make a passivation solution, then pour the passivation solution into the mixture, stir until the material is dry, and then naturally cool to prepare the passivation solution. Magnesium composite material, wherein the weight ratio of the passivating agent oxalic acid and magnesium chloride is 1: 3; the concentration of th...

Embodiment 3

[0018] A desulfurizer for pipeline steel smelting, the desulfurizer is composed of the following components in parts by weight: 75 parts of rare earth passivated magnesium composite material, 11 parts of calcium fluoride, 7 parts of barium carbonate, 17 parts of attapulgite, wherein The rare earth passivated magnesium composite material comprises 65 parts of Mg, 4 parts of CeO, and 20 parts of MgO; the preparation method of the rare earth passivated magnesium composite material is as follows: Mg, CeO and MgO are first dry mixed to make a mixture, and then Heat the mixture and control the temperature at 65°C, then mix oxalic acid, magnesium chloride and water to make a passivation solution, then pour the passivation solution into the mixture, stir until the material is dry, and then naturally cool down to prepare the passivation solution. Magnesium composite material, wherein the weight ratio of the passivating agent oxalic acid and magnesium chloride is 1: 3.5; the concentratio...

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PUM

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Abstract

The invention discloses a desulfurizing agent for pipeline steel smelting. The desulfurizing agent is composed of the following components in parts by weight: 70-80 parts of rare earth and passivated magnesium composite material, 10-12 parts of calcium fluoride, 5-8 parts of barium carbonate and 15-18 parts of attapulgite, wherein the rare earth and passivated magnesium composite material comprises 60-70 parts of Mg, 3-5 parts of CeO and 15-25 parts of MgO. The preparation method of the rare earth and passivated magnesium composite material comprises the steps of firstly, carrying out dry mixing on Mg, CeO and MgO to prepare a mixed material; then, heating the mixed material, and controlling the temperature at 60-70 DEG C; next, mixing oxalic acid, magnesium chloride and water to prepare a passivation solution; then, pouring the passivation solution into the mixed material, stirring until the material is dry, and naturally cooling to prepare the rare earth and passivated magnesium composite material, wherein the weight ratio of the passivant, namely oxalic acid to magnesium chloride is 1: (3-4), the concentration of the passivation solution is 40-50g / L, and the weight ratio of the passivation solution to the mixed material subjected to dry mixing is 1: (20-25).

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical auxiliary materials, in particular to a desulfurizer for pipeline steel smelting. Background technique [0002] In recent decades, due to the exploitation of offshore oil, the development of the automobile industry and large-scale construction projects, the requirements for steel quality have become higher and more stringent. Steel materials are required to have high strength, low temperature toughness, good cold forming properties and welding performance. In order to meet this requirement of the market, the iron and steel industries all over the world are working hard to improve the quality of steel by reducing impurities in steel, especially sulfur content. For example, in order to avoid internal cracks in steel slabs (especially continuous casting slabs) and obtain good surface quality, many users require ordinary steel [S] <0.02%; in order to make structural steel have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
Inventor 李飞
Owner WUXI CHENGBO SCI & TECH DEV
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