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Deoxygenation furnace-curing agent and its production

A furnace protection agent, magnesium oxide technology, applied in the field of deoxidation furnace protection agent and its preparation, can solve the problems of reducing slag, waste of materials, short furnace life, etc., achieve stable foam duration, long foam duration, and improve the environment conditional effect

Inactive Publication Date: 2009-01-21
杨宝权
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the traditional iron and steel smelting process, CaC is widely used 2 , C, Mn and other synthetic materials or rare metals as deoxidizers, due to CaC 2 , C, high melting point, fluoride must be introduced as a catalyst, often due to the completion of the deoxidation index, the fluoride will seriously erode the furnace wall during the reaction process, and at the same time, it also reduces the viscosity of the slag. Gas (H in the reaction 2 O, CO 2 etc.) under the impact, the molten slag boils violently, even splashes, resulting in insurmountable problems such as difficulty in slag discharge
Through the analysis of slag discharge, the content of TFe and manganese Mn in the slag is too high, which affects the quality of steel and steel output, the corrosion speed of the furnace wall is fast, the furnace life is short, waste of materials, and the smelting cost is high

Method used

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Effect test

Embodiment 1

[0040] The deoxidizing furnace protection agent includes magnesium oxide, silicon carbide, graphite and calcium oxide. Among them, magnesium oxide is obtained by calcining brucite, and calcining brucite Mg(OH) 2 Calcined at a temperature of 1200°C to generate MgO, the content of MgO after calcination is more than 90%, the dosage is 45% of the component weight percentage, the silicon carbide adopts the national standard SiC70% industrial product, and the dosage is 20% of the component weight percentage, and the graphite High-carbon graphite with 85-90% carbon, the dosage is 25% by weight of the component, calcium oxide is made by calcining active lime, active lime CaCO 3 Calcined at a high temperature of 1250°C to generate CaO, the CaO after hydrolysis is not less than 70%, and the dosage is 10% by weight of the components. The preparation method of the deoxidation furnace protection agent: 1, the physical and chemical testing of raw materials: ① determination of moisture cont...

Embodiment 2

[0042] The deoxidizing furnace protection agent includes magnesium oxide, silicon carbide, graphite and calcium oxide. Among them, magnesium oxide is obtained by calcining brucite, and calcining brucite Mg(OH) 2Calcined at a temperature of 1200°C to generate MgO, the content of MgO after calcination is more than 90%, and the dosage is 55% of the weight percentage of the component. High-carbon graphite with 85-90% carbon, the dosage is 20% by weight of the component, calcium oxide is made by calcining active lime, active lime CaCO 3 Calcined at a high temperature of 1250°C to generate CaO, the CaO after hydrolysis is not less than 70%, and the dosage is 10% by weight of the components. The preparation method of the deoxidation furnace protection agent: 1, the physical and chemical testing of raw materials: ① determination of moisture content, H 2 O2 Under certain conditions, extrude into pillow-shaped balls of 35×35×40 specifications; 7. Drying in the furnace: After the balls...

Embodiment 3

[0044] The deoxidizing furnace protection agent includes magnesium oxide, silicon carbide, graphite and calcium oxide. Among them, magnesium oxide is obtained by calcining brucite, and calcining brucite Mg(OH) 2 Calcined at a temperature of 1200 ° C to generate MgO, the content of MgO after calcination is more than 90%, and the dosage is 70% of the component weight percentage. The silicon carbide adopts the national standard SiC70% industrial product, and the dosage is 10% of the component weight percentage. High-carbon graphite with 85-90% carbon, the dosage is 16% by weight of the component, calcium oxide is made by calcining active lime, active lime CaCO 3 Calcined at a high temperature of 1250°C to generate CaO, the CaO after hydrolysis is not less than 70%, and the dosage is 4% by weight of the components. The preparation method of the deoxidation furnace protection agent: 1, the physical and chemical testing of raw materials: ① determination of moisture content, H 2 O2...

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Abstract

A deoxy-furnace agent and its production are disclosed. The furnace agent consists of magnesium 45-70wt%, silicon carbide10-20wt%, graphite16-25wt% and calcium oxide4-10wt%. The process is carried out by physical and chemical inspecting for raw material, metering formula, mechanically lifting, mixing while agitating, wheel milling while rolling, spheroidizing while shaping, drying, packing and storing. It has stable reactive speed, good deoxygenation effect and better reduction effect.

Description

Technical field: [0001] The invention belongs to the technical field of auxiliary materials for iron and steel smelting, and in particular relates to a deoxidizing furnace protection agent used in a steelmaking electric furnace and a preparation method thereof. Background technique: [0002] In the traditional iron and steel smelting process, CaC is widely used 2 , C, Mn and other synthetic materials or rare metals as deoxidizers, due to CaC 2 , C, high melting point, fluoride must be introduced as a catalyst, often due to the completion of the deoxidation index, the fluoride will seriously erode the furnace wall during the reaction process, and at the same time, it also reduces the viscosity of the slag. Gas (H in the reaction 2 O, CO 2 etc.) under the impact, the molten slag boils violently and even splashes, resulting in insurmountable problems such as difficulty in slag discharge. Through the analysis of slag discharge, the content of TFe and manganese Mn in the slag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06
Inventor 靳新华王晨耀刘晓娜
Owner 杨宝权