**Requirements for coal pitch powder for aluminum-carbon bricks**
Modified asphalt Zhao Na
I. Introduction. Aluminum carbon brick is an important refractory material, which is widely used in metallurgy, chemical and other industries. As one of the important raw materials of aluminum-carbon bricks, the quality of coal asphalt powder has an important impact on the performance of aluminum-carbon bricks. In order to ensure the quality and performance of aluminum-carbon bricks, strict requirements and controls must be carried out on coal pitch powder.
Second, the basic requirements of coal pitch powder.
1.Chemical composition: Coal pitch powder should have a high carbon content and a low impurity content to ensure the strength and thermal stability of the aluminum carbon brick. At the same time, the content of harmful elements such as sulfur, nitrogen and phosphorus in coal pitch powder should also be controlled at a low level to reduce the adverse effects on the performance of aluminum carbon bricks.
2.Physical properties: Coal pitch powder should have proper particle size distribution and good fluidity, so that it can be evenly distributed and fully mixed with other raw materials when preparing aluminum-carbon bricks. In addition, coal pitch powder should also have certain cohesiveness and plasticity to improve the compactness and erosion resistance of aluminum-carbon bricks.
3.Thermal stability: Coal pitch powder should have good thermal and chemical stability, be able to withstand thermal shock in high-temperature processes such as aluminum smelting, and maintain the structural integrity and stable performance of aluminum-carbon bricks.
3. Requirements for the production and processing of coal asphalt powder.
1.Raw material selection: select high-quality coal tar as the raw material for the production of coal pitch powder to ensure the purity and quality stability of the raw material.
2.Production process: advanced production technology and equipment are used to ensure that there is no impurity pollution in the production process of coal asphalt powder, and can produce coal asphalt powder that meets the requirements of aluminum carbon bricks.
3.Storage and transportation: Coal pitch powder should be protected from moisture, heat and pollution during storage and transportation, and its quality and performance should be maintained.
Fourth, the selection principle of coal asphalt powder.
1.Priority is given to the selection of high-quality and reputable first-class suppliers to ensure that the quality and performance of coal asphalt powder meet the requirements.
2.According to the use and use environment of aluminum carbon bricks, select appropriate varieties and specifications of coal pitch powder to meet the performance requirements of aluminum carbon bricks.
3.In the actual production process, the dosage and addition method of coal asphalt powder should be reasonably adjusted according to the production process and equipment conditions of aluminum carbon bricks to ensure the quality and output of aluminum carbon bricks.
IV. Conclusions. As one of the important raw materials of aluminum-carbon bricks, the quality of coal asphalt powder has an important impact on the performance of aluminum-carbon bricks. Therefore, when selecting coal asphalt powder, its requirements and principles should be strictly followed to ensure that the quality and performance of coal asphalt powder meet the production needs of aluminum carbon bricks. At the same time, the quality control and management of coal asphalt powder should also be strengthened to improve the quality and stability of aluminum carbon bricks.