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Filling process between dip pipes

A dipping tube and process technology, which is applied in the field of RH refining refractories and its preparation process, can solve the problems of high tank wall direction, inability to connect the dipping tube, and low center direction of the tank bottom, so as to ensure the production rhythm and avoid the inability to dock. , The effect of improving the utilization rate of refractory materials

Active Publication Date: 2022-05-13
鞍山市和丰耐火材料有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The patent document with the application number CN 103103315 A discloses "Integrated Dip Tube for RH Vacuum Refining Device". Since the lower tank is in use, the bottom of the tank must be deformed downward under high temperature load, and this deformation From the center of the tank bottom to the direction of the side wall, it is lightened sequentially, resulting in passive deformation of the two butt flanges that is lower in the center of the tank bottom and higher in the direction of the tank wall
As for the integrated immersion tube, since the flanges of the riser and downcomer have been fixed on the same plane, it is very likely that the immersion tube on one side will be successfully connected but the other side will not be connected when connecting the deformed flange. Happening

Method used

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preparation example Construction

[0041] The preparation technology of refractory filling material 1 among the present invention is as follows:

[0042] A. Recycled material preparation: Put the used CAS cover castable into the jaw crusher for coarse crushing, and the crushed granular material is screened by a vibrating screen to obtain recycled material with a particle size of 5-20mm;

[0043] B. Ingredients: According to the proportioning relationship of each component raw material, configure plate-shaped corundum particles and fine powder, 76 fused spinel 325 mesh, α-alumina micropowder, pure calcium aluminate cement, 96 microsilica, water reducing agent, explosion-proof fiber, regenerated corundum spinel castable;

[0044] C. Pre-mixing: Put 5-20mm, 5-3mm, 3-1mm and 1-0.088mm particle size materials into the planetary mixer for 2-4min dry mixing, then add 240 mesh tabular corundum powder, 325 mesh 76 fused spinel powder, α-alumina micropowder, pure calcium aluminate cement, 96 microsilica fume, water redu...

Embodiment 1

[0051] A filling process between dipping tubes, the specific method is as follows:

[0052] A. Recycled material preparation: Put the used CAS cover castable into the jaw crusher for coarse crushing, and the crushed granular material is screened by a vibrating screen to obtain recycled material with a particle size of 5-20mm;

[0053] B. Ingredients: According to the proportioning relationship of each component raw material in Table 1, configure plate-shaped corundum particles and fine powder, 76 fused spinel 325 mesh, α-alumina micropowder, pure calcium aluminate cement, and 96 microsilica , water reducing agent, explosion-proof fiber, regenerated corundum spinel castable;

[0054] The composition raw material weight ratio of table 1 embodiment 1 refractory filler

[0055]

[0056] Among them, the platy corundum granules and subdivided composition are 5-3mm, accounting for 22%, 3-1mm accounting for 34%, 1-0.088mm accounting for 30%, 240 mesh accounting for 14%; the water ...

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Abstract

The invention relates to a filling process between dip pipes. A fire-resistant filler is poured in a gap between an ascending pipe and a descending pipe. After the dip pipes are installed in a butt joint mode, a bottom plate is placed at the bottom of the center position of a gap between the two dip pipes, the upper surface of the bottom plate is attached to the lower surfaces of the dip pipes, a positioning rod is welded to the upper end of the bottom plate, and the upper end of the positioning rod is welded and fixed to a dip pipe butt joint flange; baffles are arranged on the two sides of a gap between the two dip pipes and attached to the outer surfaces of the dip pipes, the bottom edges of the baffles are tightly attached to the upper surface of the bottom plate, and the two sides of the baffles are connected with positioning rods; and pouring the mixed refractory filler into gaps among the baffle plate, the bottom plate and the two dip pipes. The manufacturing cost is low, popularization is easy, weak areas of the dip pipe can be eliminated after filling, the use amount of gunning materials is reduced, and the service life of the dip pipe is prolonged.

Description

technical field [0001] The invention relates to the technical field of a refractory material for RH refining and its preparation process, in particular to a filling process between dip tubes. Background technique [0002] The RH vacuum refining technology came out in the 1950s, with degassing as its main purpose. Today, the RH refining furnace has become a kind of equipment mainly used for degassing, deep decarburization, desulfurization, alloy blending, heating and removal of inclusions. Refining equipment outside the furnace. During the production process of the RH refining furnace, a pair of dipping pipes located at the bottom of the equipment need to be inserted into the molten steel, and the lifting gas lifts the molten steel into the interior of the RH refining furnace through the ascending pipe for degassing, decarburization and other refining operations, and then flows back through the descending pipe to Inside the ladle. During the refining process of repeated cir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/10C21C7/064C21C7/068C21C7/072
CPCC21C7/10C21C7/072C21C7/068C21C7/064C21C7/0006
Inventor 崔高扬张川刘永亮王忠明李勇王琼王鹏
Owner 鞍山市和丰耐火材料有限公司
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