Environment-friendly anhydrous stemming for submerged arc furnace and preparation method

Abstract

The invention discloses environment-friendly anhydrous stemming for a submerged arc furnace and a preparation method of the environment-friendly anhydrous stemming. The environment-friendly anhydrous stemming is prepared from the following raw materials in parts by weight: 10 to 20 parts of forsterite, 10 to 45 parts of magnesia, 10 to 20 parts of silicon carbide, 10 to 25 parts of coke, 5 to 15 parts of asphalt, 10 to 20 parts of clay, 5 to 15 parts of nitride, 3 to 10 parts of kyanite, 0 to 15 parts of quartz powder, 12 to 20 parts of carbon black oil, 2 to 8 parts of anthracene oil and 0.5 to 2 parts of plasticizer, wherein the nitride is one or a mixture of ferro silicon nitride, silicon nitride, aluminum nitride and titanium nitride, and the carbon black oil and the anthracene oil are premixed to form a composite environment-friendly binding agent for standby use; raw materials are weighed and added into a mixing mill to be dry-mixed; the binding agent is added, mixed and milled; the plasticizer is added and stirred; and the mixture is extruded and molded. The environment-friendly anhydrous stemming is safe to the human body and environment, high in performance, low in consumption, and good in slag erosion resistance and scouring resistance.

Description

technical field [0001] The invention relates to the field of refractory materials for ferroalloys, in particular to an environmentally friendly anhydrous taphole mud for submerged arc furnaces and a preparation method thereof. Background technique [0002] As the main smelting equipment in the ferroalloy industry, submerged arc furnaces are used for long-term continuous production, and the production time is generally 1-5 years or even longer. Diversified development, the smelting intensity of submerged arc furnaces is constantly increasing, and "high efficiency, low consumption, environmental protection, and longevity" are the development goals of submerged arc furnaces under the new economic situation. As the taphole mud used in the submerged arc furnace taphole (slag), the requirements for the furnace hole taphole have also increased, and higher requirements have been put forward for the material and quality. It has shifted from simple consumables to multi-functional and ...

AI Technical Summary

Problems solved by technology

[0003] At present, anhydrous taphole mud or water taphole mud combined with tar and asphalt is widely used for submerged arc furnace clay. During production and use, the pollution is relatively large, the performance is relatively low, and the stability is poor, which cannot meet the new environmental protection situation and the development of submerged arc furnace. needs

Resin-based anhydrous taphole clay still uses asphalt as a binder, which is not truly environmentally friendly. At the same time, resin-bonded blasthole clay has poor adaptability to the site, and it is prone to immobilization and hard blasting, which cannot guarantee mineral heat. High efficiency and smooth operation of furnace smelting production, low market acceptance

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