Process for producing rock/slag wool products by using iron-making blast furnace hot slag and electric-arc furnace

Abstract

The invention provides a process for producing rock / slag wool products by using iron-making blast furnace hot slag and an electric-arc furnace. The process comprises the following steps of: adding quartz sand tailings during slag receiving of a slag ladle, and partially melting quartz sand by using impact force in slag tapping and heat of blast furnace slag; conveying fly ash into electric furnaceslag by using a gas injection method, and carrying out rapid melting; adding quartz sand and a small amount of a magnesium hardening and tempering material; increasing the current of the electric arcfurnace, and carrying out stirring by using high-current and nitrogen stirring so as to allow the hardening and tempering material to be fully melted and homogenized; pouring slag in the slag ladle into the electric arc furnace, and allowing the slag just poured into the electric arc furnace and the slag provided in the furnace body to be fully molten through nitrogen stirring; and increasing thecurrent and carrying out stirring through a current loop generated by the current of the electric arc furnace so as to realize further homogenization of the slag. The process provides a new way for utilizing the blast furnace slag, increases the additional value of the utilization of blast furnace slag, and realizes high-additional-value utilization of fly ash.

Description

technical field [0001] The invention relates to the field, in particular to a process for producing rock and mineral wool products by adding hot slag from an ironmaking blast furnace to an electric arc furnace. Background technique [0002] With the rapid development of my country's iron and steel production, the total amount of solid waste produced is also increasing, of which blast furnace slag accounts for about 50%. Blast furnace slag is a silicate material with good performance, which can be fully and scientifically utilized. Blast furnace slag has great potential. [0003] At present, most iron and steel plants in my country use water quenching to treat blast furnace slag. This treatment method not only consumes a lot of water but also wastes a lot of heat energy in vain. The present invention prepares mineral wool fiber by adding appropriate amount of fly ash, silica and other tempering materials into blast furnace hot slag, and produces different types of products th...

AI Technical Summary

Problems solved by technology

[0003] At present, most iron and steel plants in my country use water quenching to treat blast furnace slag. This treatment not only consumes a lot of water but also wastes a lot of heat energy in vain.