Preparation method of ramming mass of ladle permanent liner

Abstract

The invention discloses a preparation method of a ramming mass of a ladle permanent liner. By using magnesia-calcium clinkers, waste alumina-magnesia spinel fire-proof bricks, sintered converter slag, boron nitride, attapulgite, common bauxite, kaolin, asbestos fibers, aluminum silicate fibers, corn starch and borax as raw materials, the preparation method of the ramming mass comprises the following steps through an optimized match value of granularity: 1) treating the waste alumina-magnesia spinel fire-proof bricks; 2) treating the converter slag; 3) putting powder in the steps 1) and 2) with other raw materials in the components into a blender and mixing for 4-6 hours; 4) feeding the mixed material prepared in the step 3) into a sintering furnace and roasting at 280-300 DEGC for about 6-8 hours; and 5) crushing the materials sintered in the step 4) by using a crusher, screening by a 5-mesh standard sieve, and packing screen underflow to obtain the ramming mass.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for preparing a permanent lining ramming material for a ladle. Background technique [0002] At present, there are mainly two construction methods for the permanent lining of ladles in the world: one is the early wet brickwork process, and the other is the pouring process adopted in recent years. The former requires high-alumina bricks or magnesia bricks and fire mud to fill the joints. The cost of materials is high, the work is complicated, the labor intensity is high, and the integrity is not good, so there are hidden safety hazards in the later use of the ladle; It is reduced, but the requirements for raw materials are higher, and the construction process is more complicated. It is necessary to increase equipment such as molds, mixers and vibration motors, and increase the process of stirring, pouring, vibration, health preservation, and baking. The ...

AI Technical Summary

Problems solved by technology

The former requires high-alumina bricks or magnesia bricks and fire mud to fill the joints. The cost of materials is high, the work is complicated, the labor intensity is high, and the integrity is not good, so there are hidden safety hazards in the later use of the ladle; It is reduced, but the requirements for raw materials are higher, and the construction process is more complicated. It is necessary to increase equipment such as molds, mixers and vibration motors, and increase the process of stirring, pouring, vibration, health preservation, and baking. The overall cost is still high and is affected by regional humidity. , temperature and other conditions, the popularization and application are limited

[0003] Judging from the published papers on castables and the castables actually used, the castables for permanent ladle lining are made of corundum, spinel, high alumina, mullite, etc. Lining castables not only increase the cost of raw materials and per ton steel cost, but also cause a great waste of resources

Judging from the relevant published patent applications, there is also a permanent lining for ladles developed by using recycled materials such as waste bricks. It is easy to cause deterioration of castable performance, and there is a danger of ladle piercing through the ladle

[0004] Another construction method using ramming material as the permanent lining of the ladle, there are individual reports about this method and the prior art reports on the materials used, such as CN200810190947.8, this patent document uses the ramming material method as an alternative to wet masonry And castable method proposed, its composition is simple, convenient construction, and achieved certain results, but because of its relatively simple components, its working life is short, it is difficult to maintain 2 or 3 contract service, making the permanent lining "permanent" "The two words are greatly discounted