High-temperature thermodilatometer for measuring refractory materials large test sample and method of use thereof

Abstract

The invention particularly relates to a high temperature hot dilatometer used for measuring a bulk specimen of corharts and a using method thereof. The hot dilatometer has the structure: a heating component (9) is arranged inside the body of a mill furnace (10) and the length of a soaking zone in the body of the mill furnace (10) is 200mm to 500mm; a soaking alundum tube (7) is arranged in the inner side of the heating component (9) and the tube mouth of the alundum tube (7) is arranged outside the furnace body (10); a temperature-controlling thermocouple (8) is arranged between the mill furnace body (10) and the soaking alundum tube (7) and a movable measuring device is arranged in the alundum tube (7); the using method of the device is that a temperature-time curved line of a designated material model (13) is measured and recorded firstly, and then a correcting value of the hot dilatometer is demarcated by using the temperature-time curved line and the alundum model, the dilatation of which is known; then a new model (13) of the same designated material is measured by using the demarcated hot dilatometer and thus the heat dilatation of the new model (13) of the designated material is measured out. The high temperature hot dilatometer has the advantages of convenient model manufacture and high measuring accuracy.

Description

technical field [0001] The invention belongs to the technical field of measurement of refractory materials. In particular, it relates to a high-temperature thermal dilatometer for measuring large samples of refractory materials and a method for using the same. Background technique [0002] Thermal expansion performance is a technical index of refractory materials. At present, the equipment for measuring the thermal expansion of refractory materials is mainly suitable for small samples of φ10mm×50mm or φ20mm×100mm. In general, this method can satisfy the measurement of thermal expansion properties of refractory materials. [0003] However, in many cases, refractory materials often contain very large aggregate particles, and the size of the aggregate particles exceeds 20mm. When taking small samples from refractory materials to measure thermal expansion properties, the quantity and size of aggregates taken from the samples are not easy to repeat, and the repeatability of th...

AI Technical Summary

Problems solved by technology

When taking small samples from refractory materials to measure thermal expansion properties, the quantity and size of aggregates taken from the samples are not easy to repeat, and the repeatability of the measurement results is poor.

Since the composition and microstructure of the small sample cannot have a good identity with the tested refractory material, the results obtained cannot accurately reflect the actual value of the overall refractory material

Obviously, there are certain defects in using the small sample method to measure the thermal expansion of refractory materials.

In addition, for some low-strength refractory materials, such as lightweight bricks and low-strength castables, it is not easy to make complete samples of φ10mm×50mm or φ20mm×100mm, which brings trouble to the measurement work

Images