Preparation method of nuclear graphite material

Abstract

The invention belongs to the technical field of nuclear graphite material production, and provides a preparation method of a nuclear graphite material. Adopted preparation raw materials comprise asphalt coke, needle coke, graphite powder and asphalt. In the preparation raw materials, the mass ratio of the asphalt coke to the needle coke to the graphite powder is 40:40:20, and the mass of the asphalt accounts for 45% of the total mass of the asphalt coke, the needle coke and the graphite powder. The preparation method comprises the following steps: (1) carrying out grinding: respectively grinding the asphalt coke, the needle coke and the graphite powder into powder with a particle size of 5000 meshes; (2) carrying out mixing and kneading; (3) carrying out crushing and grinding: carrying outcrushing by using a jaw crusher, and carrying out spiral extruding, milling treatment and grinding until the particle size is 4000 meshes and the purity is higher than 85%; (4) carrying out forming and pressing; (5) carrying out roasting, wherein the roasting temperature is 850 DEG C, and the temperature is kept for 48 hours; and (6) carrying out graphitizing: carrying out graphitizing treatmenton fired roasted products at a temperature of 2800-3200 DEG C. The preparation method disclosed by the invention is simple in raw material preparation and low in cost, and can be widely applied to thefield of nuclear graphite material production.

Description

technical field [0001] The invention relates to the technical field of production of graphite materials for nuclear power plants, in particular to a preparation method of nuclear graphite materials. Background technique [0002] With the continuous development of modern industrial technology, the amount and requirements of graphite materials are getting higher and higher, especially in nuclear power plants, the requirements for nuclear graphite materials are also constantly improving. In the existing technology, the production process of nuclear graphite materials is mainly It is a process of putting the powder into the bag and pressing it in an isostatic press, and then firing and graphitizing. The main disadvantages of this preparation process are slow working efficiency, coarse particle size, and small product specifications, which cannot meet the needs of existing nuclear graphite power plants under construction. Therefore, the nuclear graphite material prepared by the ...

AI Technical Summary

Problems solved by technology

The main disadvantages of this preparation process are slow working efficiency, coarse particle size, and small product specifications, which cannot meet the needs of existing nuclear graphite power plants under construction.

Therefore, the nuclear graphite material prepared by the existing nuclear graphite material preparation method is difficult to meet higher and higher technical requirements. In this case, it is necessary to invent a new preparation method of graphite for nuclear power plants to replace Existing nuclear graphite material preparation method