Method for manufacturing rock wool by using reducing agent graphene

Abstract

The invention relates to a method for manufacturing rock wool by using a reducing agent graphene. Basalt rock debris is used as a main raw material, natural gas is used as a fuel, and graphene is used as a reducing agent, so that an iron element in basalt can be effectively reduced, the amount of waste gas generated in coke combustion is reduced while coke combustion heat is increased, and coke combustion is more sufficient and durable; the continuous and stable heat release of the coke in the production melting process is realized, the expected purposes of stable melting temperature, good fiber toughness and high product strength are achieved, and a major breakthrough is made for continuous production of high-quality rock wool. The stable and continuous production in one furnace period can reach 60 days, the temperature in the smelting furnace is stable, the quality of rock wool products is improved, the consumption of coke and the emission of waste gas are reduced, and the carbon emission requirement meets the national standard.

Description

technical field [0001] The invention belongs to the technical field of rock wool production and manufacturing, and in particular relates to a method for manufacturing rock wool by using graphene as a reducing agent. Background technique [0002] In the melting process of the existing process, the continuous production of the furnace period is generally 7-15 days, and the melting temperature is unstable, resulting in low-temperature agglomeration at the bottom of the furnace, a sharp drop in product quality, and the forced re-ignition of the furnace for production (re-ignition once The consumption of coke is only about 3000KG), the iron element in basalt needs to consume a large amount of coke to be reduced to pure iron, and the iron deposited on the bottom of the melting furnace also needs to absorb heat continuously to maintain the temperature. However, coke releases a large amount of heat in the reduction zone, and then explodes concentratedly in the melting zone. After re...

AI Technical Summary

Problems solved by technology

[0002] In the melting process of the existing process, the continuous production of the furnace period is generally 7-15 days, and the melting temperature is unstable, resulting in low-temperature agglomeration at the bottom of the furnace, a sharp drop in product quality, and the forced re-ignition of the furnace for production (re-ignition once The consumption of coke is only about 3000KG), the iron element in basalt needs to consume a lot of coke to be reduced to pure iron, and the iron deposited on the bottom of the melting furnace also needs to absorb heat continuously to maintain the temperature

However, coke releases a large amount of heat in the reduction zone, and then explodes in a concentrated manner in the melting zone. After reaching the bottom of the furnace, it is already weak and cannot maintain the temperature of the bottom of the furnace.

As a result, the bottom temperature of the furnace is low and the iron and magma condense at the bottom of the furnace. Now the common remedy in the industry is to add relay coke (adding a large amount of coke every 3-6 hours). The disadvantage of this traditional process is that the amount of relay coke is difficult to control. Adding Excessive melting zone will increase, resulting in slow melting speed and serious reduction in production capacity. The product fiber is brittle and short, the product strength is poor, and the waste of coke is huge, and the addition of too little relay coke will not help

Therefore, in production, the melting temperature often rises and falls, resulting in large fluctuations in product quality.