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

A refractory material, high-temperature wear-resistant technology, applied in the field of rotary contact testing machine, can solve the problems of irregular area, large error, and the inability to use easily oxidized refractory materials, etc., achieve stable grinding pressure and speed, reduce test error, and test The effect of high temperature

Active Publication Date: 2014-09-17
UNIV OF SCI & TECH LIAONING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, a rotary contact testing machine for testing the high-temperature wear resistance of refractory materials, the main body is an electric furnace that can automatically control the temperature rise, constant temperature and temperature drop according to the program within the range of room temperature to 1650 °C. There is a groove 3 for placing the sample to be tested at the furnace door 2, and a collection tank 5 is provided at the bottom of the furnace body 6 to prevent the powder from sticking and accumulating in the furnace body; the furnace body 6 is connected to the nitrogen cylinder 13 through a pipeline , a cylindrical rotating body 1 is arranged in the furnace body 6, and the rotating body 1 is driven by a rotating power device 8. In order to protect the rotating power device 8, a water cooling device 7 is provided between the furnace body 6 and the rotating power device 8, and the rotating power device Device 8 comprises rotary motor 9...

Embodiment 2

[0035] A rotary contact testing machine for testing the high-temperature wear resistance of refractory materials, the structure and software flow are the same as those in Embodiment 1.

[0036] Using this testing machine to test the high temperature wear resistance of refractory materials, the steps are as follows:

[0037] 1. The size of the sample is 114mm×114mm×65mm. Shaped refractory samples are cut into sample specifications, and unshaped refractory materials are formed by pouring or ramming. The test surface of the sample should be flat and free of visible cracks;

[0038] 2. Basic test parameter settings: including experimental temperature 1600°C, heating rate 15°C / min before 1000°C, 8°C / min after 1000°C, constant temperature time 90 minutes; grinding pressure 850N; grinding time 25 minutes;

[0039] 3. Placement of the sample, place the pre-prepared sample to be tested in the groove reserved on the furnace door and fix it, close the furnace door and adjust the rot...

Embodiment 3

[0045] A rotary contact testing machine for testing the high-temperature wear resistance of refractory materials, the structure is the same as in Example 1, and the test control software flow is as follows image 3 shown.

[0046] The process is as follows:

[0047] a: input parameters, start;

[0048] b: Control the temperature rise of the furnace, and judge whether it reaches the set temperature; "Yes", start the hydraulic push rod to control the rotating body to move forward, and if the result is "No", continue to control the temperature rise of the furnace;

[0049] c: Judging whether the set pressure is reached, if "Yes", start the rotating motor to start the grinding test, and start the grinding timing; "No", the hydraulic push rod will continue to move forward;

[0050] d: When the pressure decay is greater than 50%, the test ends;

[0051] e: Judging whether the set grinding displacement has been reached, if "Yes", the test ends and the grinding timing is stopped, i...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/56
Inventor 李志坚吴锋曲殿利王林李心慰徐娜史树威李林山孙文静李传宇
Owner UNIV OF SCI & TECH LIAONING
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