Production method for submerged nozzle of sheet billet

Abstract

The invention discloses a production method for a submerged nozzle of a sheet billet. The production method for the submerged nozzle of the sheet billet comprises the following steps of: firstly, blending: blending raw materials according to the preset weight percentage: secondly, mixing and granulating: mixing the blended materials in the first step, adding a bonding agent and using granulating machine granules and drying granules to meet the forming conditions; thirdly, forming: adding the granules obtained in the second step into a submerged nozzle combined die of the sheet billet, closing and pressing by an isostatic pressing machine to form; fourthly, drying and sintering; and fifthly, machining: machining products obtained in the fourth step according to the requirement of the set size to obtain finished products, wherein the submerged nozzle combined die of the sheet billet in the third step comprises a base, an assembly core, an outer rubber sleeve and rubber covers, and the assembly core and the outer rubber cover are fixedly arranged on the base and the rubber covers are used for sealing the assembly core and the outer rubber cover; an inner rubber cover is arranged between the outer rubber cover and the assembly core; and an inner rubber sleeve fixing plate is arranged between the assembly core and the base.

Description

Technical field: [0001] The invention relates to a production method of a refractory material for continuous casting, in particular to a production method of a thin slab submerged nozzle. [0002] Background technique: [0003] In the production process of submerged nozzles, the most important link is molding. During molding, the mold is generally designed according to the method that the mouth of the bowl is facing downwards and the outlet hole is facing upwards. The mouth and outlet of the nozzle produced by this method are Most of the parts are round or square (the mouth of the bowl is much larger than the part of the spit hole), large in size, easy to form, easy to demould, and not easy to damage. However, the shape of special-shaped submerged nozzles, especially submerged nozzles for thin slabs, is quite different from traditional submerged nozzles, such as figure 1 figure 2 As shown, the bowl mouth part b is round and small in size, while the spout hole part a is f...

AI Technical Summary

Problems solved by technology

However, the shape of special-shaped submerged nozzles, especially submerged nozzles for thin slabs, is quite different from traditional submerged nozzles, such as figure 1 figure 2 As shown, the bowl mouth part b is round and small in size, while the spout hole part a is flat, complex in shape and large in size. In this way, if the mold is designed according to the traditional immersion nozzle mold design method, the flat body part a is very easy to cause The pressure effect on the surface is not good. After the brick is formed, the brick body of this surface is thin and cannot reach the required size. Moreover, when the traditional mold design method is used for molding, the thickness is uneven, the size changes greatly, and it is difficult to control. The most important thing is to demould Difficult and easy to damage, so the pass rate in the molding process is very low, which greatly increases the manufacturing cost

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