Method for producing converter slugging agent through electrolytic aluminum overhaul slag

Abstract

The invention discloses a method for producing a converter slugging agent through electrolytic aluminum overhaul slag. The method comprises the steps that firstly, the electrolytic aluminum overhaul slag is classified, electrolyte left after picking out carbon blocks is processed through a ball mill until the particle sizes are 1 mm-5 mm; secondly, vermiculite raw materials are purchased, the vermiculite raw materials comprise, by weight percent, 30%-45% of SiO2, 5%-35% of Fe2O3, less of 20% of Al2O3, 15%-26% of MgO, less of 1% of CaO, a jaw crusher is used for crushing the raw materials into3 mm-5 mm to serve as aggregate during pelletizing; thirdly, the materials are mixed according to the mass percent of 80: 17 to be uniform, and 3% of heavy oil is added to serve as a binding agent; fourthly, the materials are pressed into the 30 mm-50 mm spherical slugging agent through a dry powder ball press machine, and the spherical slugging agent comprises components including, by weight percent, 2%-10% of Fe2O3, less of 35% of F, less of 5% of MgO, and less or 20% of Na; fifthly, the slugging agent spheres are transported to a converter production line to be used; sixthly, the slugging agent spheres are normally used according to an application method of the slugging agent; and seventhly, the application amount of the slugging agent is 0.8 kg / ton of steel-3 kg / ton of steel.

Description

technical field [0001] The invention relates to a method for producing converter slag reducing agent by using electrolytic aluminum overhaul slag. Electrolytic aluminum overhaul slag is a hazardous waste because it is rich in various fluorides and cyanides. The invention relates to the technical fields of two different industries, the recycling technology of electrolytic aluminum solid waste and the technology of iron and steel smelting converter steelmaking. The electrolyte in the middle of the overhaul slag is mixed with auxiliary materials to produce the slag agent in the converter smelting process, which is used instead of fluorite. technology. Background technique [0002] The aluminum electrolytic cell needs to be overhauled after 4 to 7 years of operation. The waste removed is called overhaul slag, mainly waste cathode carbon blocks, waste refractory materials, waste insulation materials, etc., and a certain amount of waste is also produced during the electrolysis pr...

AI Technical Summary

Problems solved by technology

[0004] According to the above literature introduction, it can be seen that there is no technology to produce converter slag agent by using electrolytic aluminum overhaul slag