A kind of slag making material for submerged arc furnace

A submerged arc furnace and slag making technology, applied in the field of metallurgy, can solve the problems of erosion of carbonaceous furnace lining, damage to the furnace lining, cracking of the furnace lining, etc., and achieve the effects of improving sintering strength, avoiding cracking, and heating up evenly

Active Publication Date: 2020-12-18
重庆大朗冶金新材料有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The furnace method of material drying + coke drying + electric drying, material drying + coke drying can only increase the temperature in the furnace to 1000-1100 ° C, and the ore raw materials are directly converted into materials when they are electric drying, and the temperature of molten iron is directly raised to 1400 ℃, since the furnace lining has not experienced the temperature range of 1100-1400 ℃, it may even lead to cracking of the furnace lining in severe cases
[0006] 2. When coke drying + electric drying, electric drying will directly produce molten iron, which will erode the carbonaceous furnace lining and cause damage to the furnace lining

Method used

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  • A kind of slag making material for submerged arc furnace
  • A kind of slag making material for submerged arc furnace
  • A kind of slag making material for submerged arc furnace

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Embodiment Construction

[0032] Processes without specific parameters indicated in the embodiments of the present invention are usually carried out according to conventional conditions or conditions suggested by the manufacturer, and equipment or raw materials not marked with specific models are usually conventional equipment or raw materials in the metallurgical field.

[0033] The cleaning slag that the present invention selects is usually the slag that steelmaking enterprise smelts manganese steel, is made of 10-18wt%Mn, 20-50wt%SiO 2 , 10-40wt% CaO, 5-15wt% MgO, 10-30wt% Al 2 o 3 Composition, crushed to a particle size of 60-80mm, SiO in the silica used 2 content ≥ 95%, crushed to a particle size of 40-60mm, the fixed carbon content in the coke used is ≥ 86%, crushed to a particle size of 40-60mm, and the used dolomite is composed of 20-30wt% SiO 2 , 20-40wt% CaO, 10-30wt% MgO, and the balance is composed of impurities, which are crushed to a particle size of 40-60mm.

[0034] Slagging material...

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Abstract

The invention provides a slagging material for a baking oven of an arc furnace. The slagging material is prepared from, by weight, 300-400 parts of scarfing cinder, 100-220 parts of silica, 400-600 parts of dolomite and 50-150 parts of coke. The slagging material for the baking oven of the arc furnace has the advantages that the melting temperature of the slagging material is 1100-1400 DEG C, whenslag drying is carried out by adopting the slagging material, the warming interval of a brasque is 1100-1400 DEG C, the temperature difference between slag drying and electric braking can be reasonably filled, and the service life of the brasque is effectively prolonged.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a slagging material for submerged arc furnace baking. Background technique [0002] At present, after the lining of the large-scale submerged arc furnace in the ferroalloy industry is completed, it is necessary to carry out the oven operation to drive out the volatile impurities (such as a small amount of water) in the carbonaceous lining of the submerged arc furnace to ensure the long-term stable operation of the submerged arc furnace lining. . [0003] At present, the commonly used oven methods for submerged arc furnaces are: material oven + coke oven + electric oven or coke oven + electric oven. [0004] The current oven method has the following shortcomings: [0005] 1. The furnace method of material drying + coke drying + electric drying, material drying + coke drying can only increase the temperature in the furnace to 1000-1100 ° C, and the ore raw materials are directly convert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/54
CPCC21C5/5264C21C5/54
Inventor 李小平王锋余建中陶平周小明
Owner 重庆大朗冶金新材料有限公司
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