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Medium-frequency furnace ramming material

A technology for ramming material and intermediate frequency furnace, applied in the field of ramming material, can solve the problems of high labor intensity, weak slag resistance, short life, etc., to improve wear resistance and corrosion resistance, thermal shock stability Good, good electromagnetic permeability effect

Inactive Publication Date: 2015-03-18
张银亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, magnesia, silicon and high-alumina ramming materials are commonly used in intermediate frequency furnaces, but they generally have poor slag resistance and easy slagging; poor impact resistance and easy cracking of the bottom of the furnace, short service life, and high thermal conductivity. Poor stability, low thermal resistance, easy to produce cracks and wear through the furnace during use, and the labor intensity of workers to repair the furnace is large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The composition of the ramming material is: corundum 62%, spinel 15%, chromium oxide 4%, α-alumina fine powder 15%. Put corundum 62%, spinel 15%, chromium oxide 4%, α-alumina micropowder 15% into a forced sand mixer and mix for 6 minutes, then add 4% phosphate, mix for 5 minutes, and ramming. The detection performance indicators are: reburning line change (1100℃×3h) 0.15%, bulk density (1100℃×3h) 3.0 / cm3, compressive strength (1100℃×3h) 65MPa, flexural strength (1100℃×3h) 4.5MPa, thermal shock (1100℃ water cooling) 19 times, refractoriness 1750℃.

Embodiment 2

[0019] The composition of the ramming material is: corundum 53.5%, spinel 20%, chromium oxide 5%, α-alumina micropowder 18%. Put corundum 53.5%, spinel 20%, chromium oxide 5%, α-alumina micropowder 18% into a forced sand mixer for 6 minutes, then add 3.5% phosphate, mix for 5 minutes, and ramming. The test performance indicators are: reburning line change (1100℃×3h) 0.18%, bulk density (1100℃×3h) 2.95 / cm3, compressive strength (1100℃×3h) 60.5MPa, flexural strength (1100℃×3h) ) 4.8MPa, thermal shock (1100℃ water cooling) 19 times, refractoriness 1750℃.

Embodiment 3

[0021] The composition of the ramming material is: corundum 54.5%, spinel 18%, chromium oxide 3%, α-alumina micropowder 20%. Put corundum 54.5%, spinel 18%, chromium oxide 3%, α-alumina micropowder 20% into a forced sand mixer and mix for 6 minutes, then add 4.5% phosphate, mix for 5 minutes, and ramming. The detection performance indicators are: reburning line change (1100℃×3h) 0.21%, bulk density (1100℃×3h) 2.9 / cm3, compressive strength (1100℃×3h) 56.5MPa, flexural strength (1100℃×3h) ) 4.6MPa, thermal shock (1100℃ water cooling) 20 times, refractoriness 1750℃.

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PUM

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Abstract

The invention discloses a medium-frequency furnace ramming material and a preparation method thereof. The medium-frequency furnace ramming material disclosed by the invention has excellent properties of no cracking of a furnace wall, impact resistance, no scorification, long life and the like. The medium-frequency furnace ramming material comprises the following components in percentage by weight: 60%-70% of corundum, 15%-20% of spinel, 3%-5% of zirconium oxide, 15%-20% of alpha-aluminum oxide micropowder and 3%-5% of phosphate.

Description

technical field [0001] The invention relates to a ramming material used in the field of metal smelting, in particular to a dry-type ramming material for an intermediate frequency furnace and a preparation method thereof Background technique [0002] The intermediate frequency furnace is a kind of intermediate frequency current that converts alternating current into an adjustable intermediate frequency current, supplies the intermediate frequency alternating current flowing through the capacitor and the induction coil, generates high-density magnetic lines of force in the induction coil, and cuts the metal material contained in the induction coil. , A large eddy current is generated in the metal material. Due to the electromagnetic induction effect, the workpiece in the furnace generates heat spontaneously, which achieves the purpose of rapid heating. The intermediate frequency furnace is widely used in the smelting of non-ferrous metals, such as the smelting of wear-resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张银亮
Owner 张银亮