Refining ladle opening anti-sticking slag material and preparation method thereof

Abstract

The invention discloses a refining ladle opening anti-sticking slag material and a preparation method thereof. The material comprises the following raw materials in percentage by mass: 25-40% of forsterite aggregate, 5-10% of forsterite fine powder, 15-25% of waste magnesia carbon brick aggregate, 15-22% of magnesia fine powder, 3-7% of carbon material fine powder, 2-6% of silicon carbide fine powder, 1-3% of hardening accelerator and 10-14% of binding agent. The method comprises the steps that the raw materials are mixed in proportion and stirred to be uniform, then 10%-14% of a binding agentis added and stirred to be uniform, the amorphous anti-slag-sticking coating is formed, and the ladle opening and the slag feeding line are coated with the amorphous anti-slag-sticking coating. The material is a MgO-SiO2-C refined ladle opening anti-sticking slag material which is resistant to high temperature, good in slag wettability resistance, anhydrous and low in cost, ladle opening slag sticking can be effectively prevented, stuck steel slag is easy to clean, the service life of a ladle is prolonged, ladle repair is reduced, and the production efficiency of a steel mill is improved. Theraw materials adopted by the material can be recycled, and the preparation method and application of the material are simple and convenient.

Description

technical field [0001] The invention relates to a slag-resistant material for steelmaking and a preparation method thereof, in particular to a slag-resistant material for refining ladle openings and a preparation method thereof. Background technique [0002] The molten steel is contained in the ladle. During the refining process, the molten metal and liquid metal are likely to splash and slag agglomerate on the slag line and the ladle. The upper temperature is relatively low, and the slag and molten metal mixture is easy to stick to the ladle. There is some slag remaining in the mouth of the bag, and the serious slagging also affects the emptying of slag and molten steel. The adhered slag-iron mixture and the ladle refractory material are firmly combined and penetrated into it. Manual cleaning is difficult, the efficiency of slag removal is low, and it is easy to damage the metal parts and refractory materials of the ladle, which is not conducive to steelmaking production ef...

AI Technical Summary

Problems solved by technology

[0003] 1) In order to stick to the refractory material at the ladle mouth and strengthen sintering, the anti-sticking slag coatings in the prior art generally use low-melting point binders, or add low-melting material materials to make the slag easy to melt and not stick to the surface of the refractory material, but this reduces the The high temperature resistance of the material results in a lower lifespan and is not durable

[0004] 2) Existing anti-sticking slag coatings are often water-based materials, and a large amount of water needs to be added for smearing or spraying during construction

This leads to poor adhesion of the material, and it is not good for the carbon-containing matrix refractory material, which is not good for baking

[0005] 3) The anti-sticking slag coatings in the prior art are basically SiO 2 -Al 2 o 3 or SiO 2 -Al 2 o 3 -CaO material system has a large difference in chemical composition from the ladle mouth refractory MgO system, and the difference in physical properties such as expansion is large, and it is easy to peel off and fall during application

This technology does not belong to the category of refractory materials, nor is it aimed at sticking slag at the mouth of the ladle, but solves the problems of sticking slag on the wall of the ladle and serious overweight of the ladle.

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