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 testing machine for testing the high-temperature wear resistance of refractory materials and a method for testing the wear resistance of refractory materials by using the testing machine. The main body of the testing machine is an electric furnace that can be used for a long time below 1650°C. A cylindrical recrystallized silicon carbide rotating body with high strength below 1650°C is placed on the electric furnace. One end of the rotating body has grinding protrusions, and the other end is connected with The rotary power unit is linked. The rotary power device is composed of a rotary motor, an electro-hydraulic push rod and a displacement sensor. The test process includes: sample loading, electric furnace heating and constant temperature, pressurizing the sample, grinding, measuring the wear depth and displaying the test results. Except for sample loading, the others are automatically controlled by the computer. Compared with the current wear-resisting testing machine by sand blasting method, the present invention has high testing temperature and can accurately reflect the wear-resisting performance of the refractory material under the actual use state. At the same time, it has the advantages of simple structure, low cost, convenient operation and the like.

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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