Preparation method of waterless stemming used for maintaining blast furnace hearth

Abstract

The invention discloses a preparation method of waterless stemming used for maintaining blast furnace hearth, belonging to the field of the refractory material used for the blast furnace. The method comprises the following steps: (1) preparation of a refractory aggregate by using the following components in parts by mass: 12-14 parts of titanium dioxide, 3-5 parts of titanium carbide, 20-25 parts of corundum, 15-18 parts of silicon carbide, 30-38 parts of mullite, 5-7 parts of calcium-free chromium residue, 6-8 parts of blast furnace gas ash and 9-11 parts of coke are weighed, added into a mixer in sequence, and then mixed for 10-12 minutes; (2) preparation of a binder; (3) the binder is added into the refractory aggregate at a mass ratio of the refractory aggregate to the binder being 100:13-15 to obtain a mixture, and the mixture is continuously mixed and stirred for 30-35 minutes to obtain a mixed substance; and (4) the mixed substance is extruded by an extruder to form a massive substance and then packaged to obtain the final product. The waterless stemming prepared by the method provided by the invention has good opening performance and moderate plasticity, is resistant to the scour corrosion of the high-temperature iron slag, can not pollute the environment, and is low in production cost.

Description

technical field [0001] The invention relates to the technical field of refractory materials for blast furnaces, in particular to a method for preparing water-free foam mud used for maintaining blast furnace hearths. Background technique [0002] Crack clay is a refractory material used to block the taphole. At present, it can be divided into two categories: water clay and anhydrous clay. Water is used as a binder. Materials used as binders are called anhydrous taphole mud. The former is used in medium and small blast furnaces with low top pressure and low degree of intensified smelting, while the latter is used in large and medium-sized blast furnaces with high top pressure and high degree of intensified smelting. The composition of blast clay can be divided into two parts: refractory aggregate and binder. Refractory aggregate refers to refractory raw materials such as corundum, mullite, and coke gems, and modified materials such as coke and mica. The binder is organic ma...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the prior art that the binder used for blast furnace clay is polluting the environment, and the configured clay has poor performance and high production costs, and provides a water-free foam clay for maintaining the hearth of the blast furnace The preparation method, the gun clay prepared by the present invention has good plasticity and good opening performance