Process for producing steel-making deoxidizer by use of overhaul slag of aluminium cell in aluminum electrolytic plant

Abstract

The invention discloses a process for producing a steelmaking deoxidizer by utilizing the overhaul slag of an aluminum electrolytic cell in an electrolytic aluminum plant. The overhaul slag of an aluminum electrolytic cell is first crushed to about 5 cm by using a jaw crusher, and then ground to a fineness of 0.5 to 3 mm by a ball mill. , purchase local raw dolomite, in which the magnesium oxide content in the middle of the dolomite is greater than 18%, and the calcium oxide content is greater than 20%. After the raw dolomite is crushed and ground to 0.075-0.5mm, the aluminum electrolytic cell of the above two raw materials is overhauled The slag powder and raw dolomite powder are mixed evenly according to the weight ratio of 7:3, put into a high-pressure ball briquetting machine and pressed into balls as a deoxidizer, and then transported to the converter tapping station for use; when the converter is tapping, it is no longer used Calcium carbide, add 0.8-3kg of deoxidizer per ton of steel, and use it according to the traditional steelmaking process.

Description

technical field [0001] The invention relates to an industry cross-innovation process for the rational application of black aluminum ash produced in the electrolytic aluminum production process in the steelmaking production process, in particular to a process for producing a steelmaking deoxidizer by using the slag from the overhaul of the aluminum electrolytic cell of the electrolytic aluminum plant. Background technique [0002] Aluminum production enterprises and iron and steel production enterprises are both pillar industries and strategic industries of the national economy. After 3 to 5 years of use, the aluminum electrolytic cell needs to be overhauled and the liner of the cell needs to be replaced. The tank lining materials are mainly refractory bricks, insulation bricks and carbon blocks, etc. The replaced cathode lining material is the overhaul slag of the electrolytic cell, and the main components of the overhaul slag of the aluminum electrolytic cell are 70% carbon ...

AI Technical Summary

Problems solved by technology

[0007] From the description of these documents, it can be seen that there is no precedent for the application of the overhaul slag of the aluminum electrolytic cell in the electrolytic aluminum plant in the middle of the steelmaking process.