Cadmium plate special for a nuclear power plant and manufacturing technology thereof

Abstract

A cadmium plate special for a nuclear power plant and a manufacturing technology thereof are disclosed. The cadmium plate is characterized in that the size of the cadmium plate are 0.3mm-1.2mm of thickness * 500mm-1500mm of width * 1000mm-5000mm of length. The manufacturing technology thereof comprises the steps of: selecting GB zero cadmium ingot, selecting a crucible or a metal pan for melting the GB zero cadmium ingot, covering the molten liquid in the crucible or the metal pan with strong base, pouring a cadmium block at the temperature of 350-550 DEG C and lathing the cadmium block to remove oxide skins on the surface of the cadmium block, heating in a heat preservation furnace with the heating temperature of 100-320 DEG C, preserving the heat in the heat preservation furnace until the interior and exterior temperatures of the cadmium block are uniform, then performing the hot rolling and breaking to a cold-rolling blank, and afterwards, performing the cold-rolling formation gradually on a four-roller reversable rolling mill. The invention lowers the cost of the special cadmium plate and breaks the monopolization of foreign technologies, the safety and reliability completely meet the demand of nuclear power, and the invention maintains stable and reliable supply of the cadmium plate special for the nuclear power plant and promotes nuclear power industry to be soundly developed.

Description

technical field [0001] The invention relates to a non-ferrous metal plate and a preparation process, in particular to a special-purpose cadmium plate for nuclear power plants and a preparation process, which belongs to the metallurgical technology of metal materials. Background technique [0002] Nuclear power is an important part of my country's energy industry, especially when the world's oil prices remain high. my country's nuclear power industry started many years later than Western developed countries, and many key materials cannot be produced by themselves, such as nuclear power plants. The special cadmium plate used as neutron poison material in the spent fuel storage grid is one of them. [0003] In the design of nuclear power plants, the spent fuel storage grid is an important safety-related equipment in the fuel operation and storage system. They are installed in the spent fuel storage pool of the fuel plant, and their main function is to store the spent fuel compon...

AI Technical Summary

Problems solved by technology

However, the cadmium content of this special cadmium plate is greater than 99.95%, and the standard size is 0.5mm×910mm×3730. The existing domestic technological process of rolling thin steel plates and rolling non-ferrous metal thin copper plates, lead plates and aluminum plates cannot produce such ultra-thin, ultra-wide, ultra-long and difficult-to-process special cadmium plates that meet the requirements of nuclear power.

Therefore, this expensive special cadmium plate can only be imported from abroad for use in nuclear power plants, which seriously hampers the rapid development of my country's nuclear power industry.