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Passivated magnesium desulfurizer containing rare earth oxide and method for preparing same

A technology of rare earth oxide and magnesium desulfurizer, which is applied in the coating process of metal materials, etc., can solve the problems of increasing the amount of slag in molten iron, side effects of molten iron, nozzle blockage, etc., and achieve high production efficiency, long flame retardant time, and reduced loss effect

Inactive Publication Date: 2009-04-08
SHANGHAI JIAOTONG UNIV
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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] The weight ratio of cerium oxide to magnesium oxide is 10:1, and the fineness is 350 meshes to configure cerium oxide and magnesium oxide powder, and add 10 g of cerium oxide and magnesium oxide powder per 1 kg of magnesium particles and put them into a mixer for dry mixing. Mix acetic acid and magnesium chloride in a weight ratio of 1:1 to form an aqueous solution, adjust the amount of water to make the concentration of the passivation solution 65g / L, heat the passivation solution to 60°C, and then dry mix the passivation solution with the passivation solution The magnesium particles are mixed in a ratio of 1:30 (weight ratio), kept in a mixer until the material is dry, and cooled naturally to obtain the passivated magnesium desulfurizer of the present invention. The magnesium desulfurizer is silver-gray in appearance and irregular spherical in shape. Its active magnesium content is 97%, cerium oxide content is 1.5%, magnesium oxide content is 0.5%, and magnesium chlori...

Embodiment 2

[0016] The weight ratio of cerium oxide to magnesium oxide is 11:1, and the fineness is 400 meshes to configure cerium oxide and magnesium oxide powders. Add 11g of cerium oxide and magnesium oxide powders for every 1 kg of magnesium particles and put them into the mixer for dry mixing. Mix acetic acid and magnesium chloride at a weight ratio of 1:1.5 to form an aqueous solution, adjust the amount of water to make the concentration of the passivation solution 70g / L, heat the passivation solution to 70°C, and then dry mix the passivation solution with the passivation solution The magnesium particles are mixed in a ratio of 1:35 (weight ratio), stirred in a stirrer until the material is dry, and cooled naturally to obtain the passivated magnesium desulfurizer of the present invention. The passivated magnesium desulfurizer has a silver-gray appearance and an irregular spherical shape. The content of active magnesium is 96%, the content of cerium oxide is 1.8%, the content of magne...

Embodiment 3

[0018] The weight ratio of cerium oxide to magnesium oxide is 12:1, and the fineness is 450 meshes to configure cerium oxide and magnesium oxide powders. Add 12g of cerium oxide and magnesium oxide powders for every 1 kg of magnesium particles and put them into the mixer for dry mixing. Mix acetic acid and magnesium chloride in a weight ratio of 1:2 to form an aqueous solution, adjust the amount of water to make the concentration of the passivation solution 75g / L, heat the passivation solution to 80°C, and then dry-mix the passivation solution with the passivation solution The magnesium particles are mixed in a ratio of 1:40 (weight ratio), stirred in a stirrer until the material is dry, and cooled naturally to obtain the passivated magnesium desulfurizer of the present invention. The passivated magnesium desulfurizer has a silver-gray appearance and an irregular spherical shape. The content of active magnesium is 95%, the content of cerium oxide is 2%, the content of magnesium...

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Abstract

The invention discloses a passivation magnesium desulfurizer and preparing method with rare earth oxide in the metal smelting technical domain, which comprises the following parts: 95%-97% active magnesium, 1.5%-2 % cerium oxide, 0.5%-1.5% magnesium oxide and 1%-1.5% magnesium chloride. The preparing method comprises the following steps: proceeding dry mixing for metal magnesium particle and cerium oxide and magnesium oxide powder; adding acetate, magnesium chloride and water to allocate passivation liquid; pouring the passivation liquid into metal magnesium particle with cerium oxide and magnesium oxide powder; stirring until the material is dry; cooling naturally to obtain the product.

Description

technical field [0001] The invention relates to a desulfurizer used in the technical field of metal smelting and a preparation method thereof, in particular to a passivated magnesium desulfurizer containing rare earth oxides and a preparation method thereof. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064C23C22/57
Inventor 黄均麟万见峰谢超英陈锦松龙川江
Owner SHANGHAI JIAOTONG UNIV
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