Environment-friendly furnace lining material for medium-frequency induction furnace and preparation method of environment-friendly furnace lining material

A technology for induction furnaces and furnace lining materials, used in fire-resistant coatings and other directions, can solve the problems of reduced service life, poor thermal shock resistance, and reduced refractoriness of furnace lining materials, and achieves long service life, high refractoriness, and improved furnace age. Effect

Active Publication Date: 2014-12-17
YICHANG KEBO OLIVINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of boric acid is added, which seriously reduces the refractoriness of the lining material and affects the corrosion resistance of the lining, which leads to a short service life of the lining and cannot be recycled.
Secondly, the thermal shock resistance of magnesia materials is poor, which leads to the cracking of furnace lining materials and the decrease of service life.
In addition, boric acid is expensive, which also restricts the comprehensive cost control of smelting

Method used

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  • Environment-friendly furnace lining material for medium-frequency induction furnace and preparation method of environment-friendly furnace lining material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 10kg of 5~3mm magnesia particles, 40kg of 3~1mm magnesia particles, 25kg of 1~0.09mm magnesia particles, 10kg of 200 mesh magnesia fine powder, 15kg of micro silica powder, plus 0.5 parts of boric acid , and stirred for 10 minutes to obtain an environment-friendly lining material for an intermediate frequency induction furnace.

Embodiment 2

[0025] Weigh 20kg of 5~3mm magnesia particles, 30kg of 3~1mm magnesia particles, 35kg of 1~0.09mm magnesia particles, 10kg of 200 mesh magnesia fine powder, 5kg of microsilica powder, add 0.5kg of boric acid and 0.5kg of boric anhydride, stirred for 18 minutes to obtain an environment-friendly lining material for an intermediate frequency induction furnace.

Embodiment 3

[0027] Weigh 10kg of 5~3mm magnesia particles, 10kg of 3~1mm magnesia particles, 10kg of 1~0.09mm magnesia particles, 25kg of 200 mesh magnesia fine powder, 30kg of micro silica powder, plus 0.5kg of boric acid and 1.5kg solid water glass, and stirred for 30 minutes to obtain an environment-friendly lining material for an intermediate frequency induction furnace.

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Abstract

An environment-friendly furnace lining material for a medium-frequency induction furnace is composed of the following raw materials by weight: 10 to 20 parts of magnesia particles with particle size of 5 to 3 mm, 10 to 40 parts of magnesia particles with particle size of 3 to 1 mm, 10 to 35 parts of magnesia particles with particle size of 1 to 0.09 mm, 4 to 30 parts of micro silicon powder mixture, and 0.5 to 2 parts of additive; and when the furnace lining material is prepared, 0 to 25 parts of magnesia powder with the size of 200 meshes. The environment-friendly furnace lining material, provided by the invention, has the characteristics of high refractoriness, long service life, recoverability, and the like.

Description

technical field [0001] The invention relates to an environment-friendly furnace lining material for an intermediate frequency induction electric furnace and a preparation method thereof, belonging to the technical field of intermediate frequency induction electric furnaces. Background technique [0002] At present, the lining materials of intermediate frequency induction furnaces for melting high manganese steel in the foundry industry mostly use magnesia as the main raw material and add 3~5wt% boric acid as the sintering agent. Magnesia has a high sintering temperature (1700°C) and is extremely difficult to sinter. In order for the furnace lining to obtain higher strength to withstand the impact of steel blocks and the erosion of molten steel, a sufficient amount of boric acid must be added to reduce the sintering temperature and generate strength. However, a large amount of boric acid is added, which seriously reduces the refractoriness of the lining material and affects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K21/02C04B35/66
Inventor 李淑闻段毅郑晓
Owner YICHANG KEBO OLIVINE
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