- Time:Jul 18, 2023
The rotary kiln is a common equipment for calcining and solidifying materials, and refractory bricks are the key material for the lining of the rotary kiln. The quality requirements of refractory bricks for rotary kiln mainly include the following aspects:
1. Requirements for chemical composition: The chemical composition of refractory bricks should meet the requirements of relevant standards or contracts, and the specific requirements vary according to different types of refractory bricks. Common types of refractory bricks include high alumina bricks, silicate bricks, magnesia bricks, etc.
2. Physical performance requirements:
2.1 Bulk density: The bulk density of refractory bricks should meet the relevant standards or the range agreed in the contract.
2.2 Compressive strength: The compressive strength of refractory bricks under certain conditions should meet the requirements of relevant standards or contracts.
2.3 Refractoriness: The refractoriness of a refractory brick indicates the highest service temperature it can withstand. Different types of refractory bricks correspond to different refractoriness requirements.
2.4 Linear change rate: The dimensional change of refractory bricks during heating and cooling should comply with the relevant standards or the limits agreed in the contract.
2.5 Apparent porosity: The percentage of pores exposed in refractory bricks, which is specified for some special requirements.
3. Requirements for test methods: The test methods for sample preparation of refractory bricks, related physical performance tests, and refractoriness tests are determined. The quality and performance of refractory bricks can be evaluated and verified by these test methods.
4. Marking, packaging, transportation and storage requirements: For qualified refractory bricks, corresponding markings should be carried out and appropriate packaging, transportation and storage measures should be taken to ensure that they are not damaged during transportation and storage.
