Rotary contact-type testing machine and method for testing high temperature and wear resistance of refractory materials

Abstract

The invention relates to a rotary contact-type testing machine which is used for testing the high temperature and wear resistance of refractory materials and a method for performing wear-resisting tests on refractory materials by the testing machine. A main body of the testing machine is an electric furnace which can be used for a long term below 1650 DEG C; a cylindrical recrystallized silicon carbide rotating body which has strong strength below 1650 DEG C is arranged on the electric furnace; and one end of the rotating body is provided with a grinding bulge and the other end of the rotating body is connected with a rotary power device. The rotary power device comprises a rotary motor, an electric-hydraulic pusher, a displacement sensor and the like. The test process comprises the steps of filling a sample, heating the electric furnace and keeping the temperature constant, pressurizing the sample, grinding, measuring the wearing depth, displaying the test result and the like. Except the step of filling the sample, other steps are automatically controlled by a computer. Compared with the existing abrasion testers which adopt abrasive blasting, the testing machine disclosed by the invention has the advantages of high test temperature, capability of accurately showing the wear-resisting property of refractory materials in practical use, simplicity in structure, low cost and convenience in operation.

Description

technical field [0001] The invention relates to the field of performance detection of refractory materials, in particular to a rotary contact testing machine for detecting the high-temperature wear resistance of various refractory materials and a detection method thereof. Background technique [0002] Most of the refractory linings used in high-temperature equipment such as dead-burned magnesia shaft kiln, two-step calcined magnesia kiln, cement rotary kiln, blast furnace and heating furnace are mainly damaged by mechanical wear. Therefore, when developing, producing and selecting refractory materials for such high-temperature kilns, high-temperature wear resistance is a very important detection index. At present, the "sandblasting method" is generally used for testing the wear resistance of refractory materials, that is, heating the sample to be tested to a set temperature (less than 1300°C) and holding it for half an hour, and then spraying a certain amount of silicon carb...

AI Technical Summary

Problems solved by technology

This detection method has the following disadvantages: First, it uses compressed air sand blasting, which cannot guarantee the consistency of the impact force of each sample by sand blasting, so the error is relatively large; second, the impact area of ​​the sample after the wear test is formed The area of ​​the wear area is irregular, so it is impossible to accurately quantify the wear rate, and it is difficult to compare parallel samples; third, because the existing technology uses silicon carbide particles as the grinding medium, the maximum detection temperature can only reach 1300 ° C, and most The operating temperature of refractory materials for high-temperature kiln lining is above 1300°C; fourth, it can only be used in an oxidizing atmosphere, and cannot be used for easily oxidizable refractory materials such as carbon or silicon carbide.

Therefore, the existing wear resistance testing equipment cannot truly reflect the high temperature wear resistance of refractory materials under service conditions, and has limited guiding significance for practical applications.

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