Calcined alumina powder is processed by high temperature calcination above 1450 ℃ to convert gamma crystal form into alpha crystal form. Generally, the conversion rate of alpha alumina is above 95%. The higher the alpha conversion rate, the more complete the calcination and the higher the calcination temperature. The calcined alumina needs to be finely ground to reach the level of micro powder for use as raw materials in ceramics or refractory materials. The processing equipment for calcined alumina micro powder and high-temperature calcined alumina powder mainly includes the following types of equipment.
1. The ball mill is the most economical and simple way to process calcined alumina powder, with simple and flexible operation and low production costs. However, there are significant difficulties in processing fine products.
2. Mechanical grinding: It is also a common processing method, mainly producing high-end ultrafine powder products.
3. Airflow mill: It is an ideal equipment for processing fine product raw materials. The disadvantages are high energy consumption, low output, high production costs, and high equipment prices.
4. Other wind selection equipment for processing calcined alumina powder has disadvantages such as significant processing costs. At present, domestic alumina manufacturers mainly use ball mills to grind and calcine alumina.
Method for testing the fineness of high-temperature calcined alumina powder:
Calcined alumina micro powder | High temperature calcined alumina powder is a commonly seen raw material in industry, with characteristics such as high temperature resistance, wear resistance, acid and alkali resistance. Therefore, it can be used to produce refractory materials, brake pads, wear-resistant ceramic tiles, insulation materials and other products. Has high utilization value. How to determine the fineness of the detected micro powder? Below, we will provide a detailed introduction:
1. Laser particle size analyzer detection: This method is the most effective and accurate detection method, which can be directly presented in the form of data and graphs. The fineness value can make you see at a glance. At that time, the price of laser particle size analyzers was also relatively high, and the cost was relatively high.
Sieve detection: Sieve detection is a relatively comparative method. Although it is not as intuitive and accurate as a particle size analyzer, it can still compare the particle size and fineness values of calcined alumina micro powder. Relatively simple cost reduction.
CONTACT US
