1. The purity of the selection of raw materials for the selection of nuclear high pure graphite is the same as the prerequisite for production, and it is related to the ash component of the raw materials selected by the production. The civilian type can expand graphite products that are that regularity: raw materials are ash, and their products are also large. Therefore, the oil coke ash selected by the production nuclear high -pure graphite specifies the mouth. 15%of the following, although the boron component proposes the requirements, it will be analyzed, and the specific data information will be 0.5pp. the following. Results The total ash was divided into 5 PPMs, and the boron components were mouth. LPPM up and down, the section of the hot neutron absorption is 3.8, 94 mubes.

2. High temperature adjustment treatment and other halogen to solve the temperature of the temperature when the graphitization of the product, and whether it carried out another halogen solution, which is a fundamental harm to the removal of gray. Various residual components generally evaporate after 1500 ° C, and the basis of 2500'C is completed. In addition, the actual effect of removing the residue of the residue is even more significant. For example, a certain type of commodity is used as an example. The hot punage only reduces the gray portion of 7%by more than 7%, and the purification of halogen bulb organic chemistry can reduce it by more than double.

3. Control the prerequisites of clearing polyester in each production process and strictly control, and further pay attention to the prerequisite conditions of the clearance. The infiltration of the production of raw materials and pastes has certain effects on ensuring the purity of the nuclear high -pure graphite. When the goods are graphitized and the production and processing are prohibited, water, oil, sweat, and other items are dirty products.

4. Commonly used machines and equipment for expanding graphite powder: After the raw material is enrolled, the process is premedated to a mixed process process. %Up and down, and the gray portion of the mixed -pinch is more than 9%of the raw material. For the reason for the improvement of the gray portion, in addition to the lack of storage of raw materials and infiltration into the dust of the dirt, the more critical reason is caused by the metal powder and refractory soil damaged by the machine equipment selected in production. Therefore, in the future, the machinery and equipment that produces nuclear high -pure graphite can be improved or rated less ash is a topic research that is very worthy of scientific research. Come out and wait.