Medium-frequency furnace lining alumina-magnesia dry ramming material preparation and sintering process

A dry ramming material, intermediate frequency furnace technology, applied in the field of iron and steel metallurgy, can solve the problems of unreasonable sintering process steps, high manufacturing cost, complex structure of the intermediate frequency furnace, etc., to improve chemical corrosion resistance and thermal shock resistance. , the effect of improving the service life

Inactive Publication Date: 2019-04-26
浙江正锋实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other smelting processes, intermediate frequency furnace smelting has the characteristics of short process and convenient production adjustment, but the structure of intermediate frequency furnace is complex, the induction coil is cooled by water, and the quality of intermediate frequency furnace ramming material is high.
If the quality of the dry ramming material is not good, safety accidents such as steel breakout and explosion are very likely to occur, and the traditional sintering process steps are not reasonable enough, resulting in insufficient refractoriness and corrosion resistance of the prepared furnace lining, and the service life of the furnace lining is not long , and the manufacturing cost is high, and the pollution to the environment is serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The present invention is a kind of intermediate frequency furnace lining aluminum-magnesium dry ramming material configuration and sintering process, wherein, the ramming material is selected from the following components with preferred weight percentages:

[0034] 68% of pellets with a particle size of 0.5mm-3mm;

[0035] 30% of powder materials with particle size less than or equal to 0.5mm;

[0036] 0.3% of admixtures with particle size ≤0.1mm;

[0037] 1.7% of high temperature composite sintering accelerator with particle size ≤0.005mm;

[0038] Among them, the components of the granular material are: fused brown corundum particles, white corundum particles, tabular corundum particles, and magnesia particles; the components of the powder material are: magnesia fine powder, corundum fine powder; the admixture is boric acid; The high temperature composite sintering accelerator is a mixture of silicon powder and SiC powder.

[0039] Among them, the intermediate freq...

Embodiment 2

[0048] The present invention is a kind of intermediate frequency furnace lining aluminum-magnesium dry ramming material configuration and sintering process, wherein, the ramming material is selected from the following components with preferred weight percentages:

[0049] 72% of pellets with a particle size of 0.5mm-3mm;

[0050] 26.3% of powder material with particle size ≤0.5mm;

[0051] 0.5% of admixtures with particle size ≤0.1mm;

[0052] 1.2% of high temperature composite sintering accelerator with particle size ≤0.005mm;

[0053] Among them, the components of the granular material are: fused brown corundum particles, white corundum particles, tabular corundum particles, and magnesia particles; the components of the powder material are: magnesia fine powder, corundum fine powder; the admixture is boric acid; The high temperature composite sintering accelerator is a mixture of silicon powder and SiC powder.

[0054] Among them, the intermediate frequency furnace lining s...

Embodiment 3

[0056] The present invention is a kind of intermediate frequency furnace lining aluminum-magnesium dry ramming material configuration and sintering process, wherein, the ramming material is selected from the following components with preferred weight percentages:

[0057] 65.8% of pellets with a particle size of 0.5mm-3mm;

[0058] 32% of powder materials with particle size less than or equal to 0.5mm;

[0059] 0.2% of admixtures with particle size ≤0.1mm;

[0060] 2% of high temperature composite sintering accelerator with particle size ≤0.005mm;

[0061] Among them, the components of the granular material are: fused brown corundum particles, white corundum particles, tabular corundum particles, and magnesia particles; the components of the powder material are: magnesia fine powder, corundum fine powder; the admixture is boric acid; The high temperature composite sintering accelerator is a mixture of silicon powder and SiC powder.

[0062] Among them, the intermediate freq...

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Abstract

The invention discloses a medium-frequency furnace lining alumina-magnesia dry ramming material preparation and sintering process, and relates to the technical field of steel metallurgy. A ramming material of the invention mainly comprises the following components in percentage by weight: 65%-75% of granules with the particle size being 0.5 mm-3 mm, 20%-45% of a powder material with the particle size less than or equal to 0.5 mm, 0.1%-0.5% of an admixture with the particle size less than or equal to 0.1 mm and 1%-3% of a high-temperature composite sintering accelerator with the particle size less than or equal to 0.005 mm. According to the method, the thermal shock resistance and the chemical corrosion resistance of the ramming material are improved through reasonable particle gradation, spinel is formed in use of a furnace lining in cooperation with a reasonable sintering process, generated expansion is matched with contraction generated by sintering, the sintering quality of the medium-frequency furnace lining after construction can be obviously improved, the overall strength of the furnace lining is excellent, the surface of the furnace lining is smooth, the damage is uniform, and the service life of the furnace lining is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to an intermediate frequency furnace lining aluminum-magnesium dry ramming material configuration, and an intermediate frequency furnace lining sintering process. Background technique [0002] The ramming material is prepared from a high proportion of granular materials and a very low proportion of binders and other additives, or even all of them are composed of granular and powdery materials. Ramming material is widely used in metallurgy, building materials, non-ferrous metal smelting, chemical industry, machinery and other manufacturing industries, mainly used in medium and high temperature parts of industrial furnaces, such as blast furnace iron ditch, electric arc furnace melting cover, medium frequency induction furnace lining, melting furnace Repair or inconvenient pouring construction parts. [0003] The quality of the intermediate frequency ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103C04B35/622C21C5/52
CPCC04B35/103C04B35/622C04B2235/3206C04B2235/3409C04B2235/3826C04B2235/428C04B2235/608C04B2235/6562C04B2235/6567C21C5/5241Y02P10/20
Inventor 李殿军
Owner 浙江正锋实业有限公司
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