Self-repairing anhydrous stemming

Abstract

The invention relates to the technical field of ferrosilicon production, in particular to self-repairing anhydrous stemming which comprises 41-45% of powder, 39-45% of aggregate, 11-14.5% of binding agent, 1.5-1.9% of antioxidant and 0.9-1.4% of plasticizer. The powder comprises silica fume, fly ash and clay, the aggregate comprises anthracite, coke powder, graphite and waste carbon bricks, the binding agent comprises coal tar, phenolic resin, aluminum phosphate and asphalt powder, the antioxidant comprises Al powder, Fe powder and Si powder, and the plasticizer comprises sodium carboxymethylcellulose and polyvinyl alcohol. The self-repairing anhydrous stemming is obtained by adjusting the components and the proportion, can be firmly combined with a furnace hole brick into a whole under the high-temperature condition, automatically repairs the gradually-enlarged furnace hole size, prolongs the repairing period and prolongs the service life of the furnace hole brick while meeting the iron notch plugging function.

Description

technical field [0001] The invention relates to the technical field of ferrosilicon production, in particular to a self-repairing anhydrous taphole clay. Background technique [0002] Submerged arc furnaces for smelting ferrosilicon are generally equipped with 2-4 tapholes, and ferrosilicon alloy and a small amount of slag liquid are discharged from the tapholes. Therefore, the tapholes are very important parts of submerged arc furnaces. With the enlargement of submerged arc furnaces for ferrosilicon production and the advancement of intensified smelting technology, the number of tapping times increases, and the process conditions in this part become more stringent. After the molten iron is completed in the submerged arc furnace, the tap hole is blocked with gun mud. During the operation of the submerged arc furnace, the high-temperature molten iron and high-pressure gas jets frequently wash and erode the tap hole, and when the tap hole is opened and blocked, Mechanical vib...

AI Technical Summary

Problems solved by technology

At the same time, it can ensure that the furnace condition runs smoothly for a long time, and the slag discharge and charcoal are normal, which can indirectly improve the production index, but there is also the problem of poor self-repair performance

[0007] To sum up, at present, the anhydrous taphole mud used in domestic iron-silicon submerged arc furnaces can only meet the needs of blocking iron holes in terms of function, and the existing problems are also obvious, that is, the service life of furnace eye bricks is short, and the overhaul cycle of submerged arc furnaces is usually short. Increased operating costs of submerged arc furnaces

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