A kind of production method of special acidic dry vibration furnace lining for metal silicon smelting

A production method and metal silicon technology, applied in the field of refractory materials, can solve the problems of high cost, poor mechanical shock resistance and thermal shock resistance of furnace lining, etc., and achieve good chemical corrosion resistance, excellent thermal shock resistance and low raw material cost. low effect

Active Publication Date: 2022-05-27
尊龙新材料(山东)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent can effectively isolate and inhibit the carbon in the furnace charge (hot metal) from the SiO in the furnace lining through the extremely high refractoriness of nano-silicon carbide and graphene. 2 corrosion, but the patent obtained the poor mechanical shock resistance and thermal shock resistance of the lining, and the patent adds graphene with a mass fraction as high as 5~10wt%, which is an expensive additive for the lining material used as a consumable unbearable

Method used

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  • A kind of production method of special acidic dry vibration furnace lining for metal silicon smelting

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Effect test

Embodiment 1

[0039] Embodiment 1: a kind of production method of special acid dry vibration furnace lining for metal silicon smelting

[0040] Include the following steps:

[0041] 1. Preparation of sintering aids

[0042] (1) Preparation of silica-alumina gel

[0043] Add 1.2 kg of water-based fumed silica to 120 kg of potassium silicate aqueous solution with a mass concentration of 21%, stir until the solution is transparent, then add 24 kg of a 18% mass fraction of silicon phosphate aqueous solution, stir evenly, and control the stirring speed to 2600 rpm / 8.4 kg of sodium aluminosilicate powder was slowly added to the solution. After the addition, the solution was stirred until the solution was in a milky white suspension state. aluminum gel;

[0044] The potassium silicate aqueous solution has a potassium silicate modulus of 2.8;

[0045] The water-based fumed silica has a particle size of 20 nm;

[0046] The sodium aluminosilicate powder has a particle size of 120 nm;

[0047] ...

Embodiment 2

[0055] Embodiment 2: a kind of production method of special acid dry vibration furnace lining for metal silicon smelting

[0056] Include the following steps:

[0057] 1. Preparation of sintering aids

[0058] (1) Preparation of silica-alumina gel

[0059] Add 0.96 kg of water-based fumed silica to 120 kg of potassium silicate aqueous solution with a mass concentration of 16%, stir until the solution is transparent, then add 14.4 kg of a 13% mass fraction of silicon phosphate aqueous solution, stir evenly, and control the stirring speed to 2000 rpm / 7.2 kg of sodium aluminosilicate powder was slowly added to the solution. After the addition, the solution was stirred until the solution was in a milky white suspension state. aluminum gel;

[0060] Described potassium silicate aqueous solution, potassium silicate modulus 2.2;

[0061] The water-based fumed silica has a particle size of 20 nm;

[0062] The sodium aluminosilicate powder has a particle size of 120 nm;

[0063]...

Embodiment 3

[0070] Embodiment 3: A kind of production method of special acid dry vibration furnace lining for metal silicon smelting

[0071] Include the following steps:

[0072] 1. Preparation of sintering aids

[0073] (1) Preparation of silica-alumina gel

[0074] Add 1.44 kg of water-based fumed silica to 120 kg of potassium silicate aqueous solution with a mass concentration of 25%, stir until the solution is transparent, and then add 15.6 kg of a 20% mass fraction of silicon phosphate aqueous solution, stir evenly, and control the stirring speed to 3000 rpm / 12 kg of sodium aluminosilicate powder was slowly added to the solution. After the addition, the solution was stirred until the solution was in a milky white suspension state. aluminum gel;

[0075] Described potassium silicate aqueous solution, potassium silicate modulus 2.2;

[0076] The water-based fumed silica has a particle size of 20 nm;

[0077] The sodium aluminosilicate powder has a particle size of 120 nm;

[00...

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Abstract

A method for producing acidic dry-vibration furnace linings for metal silicon smelting, comprising four steps of preparing sintering aids, mixing furnace lining materials, forming furnace linings, and sintering furnace linings; the chemical formula of the sintering aids is 3Al 2 o 3 ·17SiO2 2 ; The furnace lining material includes 14-19 parts by weight of fused quartz, 60-74 parts of natural quartz, 0.5-1.5 parts of chromium oxide fine powder, 0.5-1.3 parts of zirconia fine powder, 5-5 parts of silicon carbide fine powder 7 parts, 2.5~5.0 parts of boron nitride fine powder, 1~2 parts of boric acid, 2.5~4.2 parts of sintering aid; the obtained furnace lining has a service temperature of > 1700 °C, a corrosion resistance index of molten iron of 2.4~3.7%, and a compressive strength of 51~ 59MPa, the thermal conductivity at 600°C is 23.922~28.639W / mK, and the service life of the furnace lining reaches 332~363 furnaces at the operating temperature of 1750°C.

Description

technical field [0001] The invention relates to a production method of a special acid dry vibration furnace lining for metal silicon smelting, and belongs to the field of refractory materials. Background technique [0002] When metal silicon is smelted in an intermediate frequency induction furnace, the dry vibrating furnace lining made of natural quartz and part of fused quartz is commonly used in the market. Undurable conditions, short service life, high cost of refractory materials, and frequent repair of the furnace bottom seriously affect the continuity and efficiency of production. [0003] Chinese patent CN113548880A discloses an excellent high-strength thermal shock-resistant acid dry vibrating material and its construction method. The dry vibrating material includes quartz sand particles, fused silica sand particles and fine powder. The formula of the invention improves the thermal shock resistance and density of the furnace lining by means of high-purity microcrys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/14F27D1/00C04B35/64C04B35/622
CPCC04B35/66C04B35/14F27D1/0006C04B35/64C04B35/622C04B2235/3463C04B2235/3241C04B2235/3244C04B2235/3826C04B2235/386C04B2235/3409C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607C04B2235/9669C04B2235/9676
Inventor 张建民
Owner 尊龙新材料(山东)有限公司
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