High Temperature and Wear Resistant Materials with Improved Operating Properties
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Vol. 61, No. 1, May, 2020
HIGH TEMPERATURE AND WEAR RESISTANT MATERIALS WITH IMPROVED OPERATING PROPERTIES B. N. Satbaev,1 A. Kh. Nurumgaliev,2 Yu. I. Shishkin,2 É. O. Aimbetova,1,3 N. T. Shalabaev,1 and A. B. Satbaev1 Translated from Novye Ogneupory, No. 2, pp. 30 – 34, February, 2020.
Original article submitted December 4, 2019. Results are provided for studies of self-sintering refractory mix preparation. New technology is proposed for their manufacture. The basis of the mixes obtained is barite-containing components (barite or witherite concentrates). Good chemical resistance, refractoriness, mechanical strength, hardness and wear resistance determine the scope of their application, i.e., manufacture of refractory products, linings, pastes, and concrete. Keywords: barite-containing components, barite concentrate, witherite concentrate, metallurgical production.
A considerable variety of materials with different physical and chemical properties and the possibility of their extensive use gives rise to a requirement for selecting both the most suitable material and also the method for providing equipment protection. This in turn facilitates development of production for compositions of refractory and chemically stable materials and objects based upon them with a set of prescribed properties. Questions of technology for producing chemically stable materials are quite extensive in publications [1 – 11]. Objects prepared on the basis of these materials exhibit good acid resistance, thermal stability, and a number of favorable properties for protection of chemical equipment. Research is well known for development of heat-resistant, corrosion-resistant materials, and fireproof compositions based on solid waste of aluminothermal processes in rare element metallurgy [12]. There is an extensive range of refractory products and also chemically stable materials (normally not withstanding high operating temperatures), although there is almost no output of materials that could be refractory and chemically stable. Theoretical bases for the production of refractory and ceramic materials were proposed for the first time by Academi1
2 3
cian A. A. Baikov who considered the process of transformation of powder mixes into solid crystalline concretions as a process of recrystallization of refractory material in a liquid phase at a specific temperature [13]. The conditions that it is necessary to observe in order tom prepare good quality high-temperature materials formulated by A. A. Baikov are as follows: – presence within a charge of such impurities with which the material may melt and may dissolve within it; – firing at a temperature providing formation of the required amount of melt; – exposure at a firing temperature for time adequate in order to complete recrystallization. A method for preparing and the composition of a self-sintering refractory mix for preparing refractory objects makes it possible to simplify and cheapen technology due to excluding labor-consuming operations of compaction, reducing the electrical energy c
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