Preparation method of large-size sintered silicon carbide wear-resistant pipeline

Abstract

The invention discloses a preparation method of a large-size sintered silicon carbide wear-resistant pipeline, which comprises the following steps: earlier-stage molding, slurry mixing and slip casting, later-stage sintering and earlier-stage molding. The method specifically comprises the following steps that (1) a production drawing is processed, (2) an outer bottom die is manufactured, (3) an inner bottom die is manufactured, (4) the outer bottom die is used for manufacturing the production outer die, (5) a production inner die is manufactured, and (6) the production inner die is used for manufacturing the inner die. After the sizes of the production units are obtained after a drawing is analyzed, production is conducted according to the production units, then splicing is conducted, andthe large-size sintered silicon carbide abrasion-resistant pipeline can be obtained. The method is simple in overall process, the content of the dispersing agent and the content of the binding agent are increased in the slurry, blank forming can be promoted, and therefore the problem that a large-size pipeline is prone to cracking is solved. According to the technology, a traditional production process is completely changed, a two-mold-opening structure is adopted, and a positioning assembly and a sliding block assembly structure are additionally arranged on the mold, so that green body forming and demolding can be assisted, and use is convenient.

Description

technical field [0001] The invention relates to a method for preparing a sintered silicon carbide grouting pipe device, in particular to a method for preparing a large-sized sintered silicon carbide wear-resistant pipe with a large size, improved pipeline cracks, and increased yield, which belongs to carbonization The technical field of silicon products. Background technique [0002] Silicon carbide has become an important abrasive because of its great hardness, and its application range exceeds that of general abrasives. In industrial production, silicon carbide smelting blocks usually use quartz, petroleum coke, etc. as raw materials, auxiliary recycled materials and waste materials, and are prepared through grinding and other processes to become a charge with a reasonable ratio and a suitable particle size (in order to adjust the gas permeability of the charge, it is necessary to add Appropriate amount of sawdust, when preparing green silicon carbide, add appropriate amo...

AI Technical Summary

Problems solved by technology

[0003] When the existing industrial reaction sintered silicon carbide ceramics are used to manufacture sintered silicon carbide wear-resistant pipes with large diameter and large thickness, if the diameter of the silicon carbide ceramic pipe is greater than 500mm and the wall thickness is greater than 17mm, the production method is adopted: mold making Finally, grouting is carried out and then sintered to make sintered silicon carbide wear-resistant pipes. It is not suitable to control the size of the mold and the amount of grouting during the mold making-grouting. The yield of the produced sintered silicon carbide wear-resistant pipes is low, and because of its The overall size is large, which is prone to cracks, which will greatly increase the production cost and reduce the economic benefits of the enterprise, and it is difficult to meet the application requirements of production and use

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