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Application of liquid nitrogen

Liquid nitrogen is a cryogenic liquid at -196℃. It is derived from nitrogen, which occupies more than 70 percent of the air component. Inert, colorless, non-toxic, volatile, very wide range of use. Liquid nitrogen is volatile at low temperature, so it is generally stored in a special container - liquid nitrogen tank.

1. Manufacturing and testing of electronic components

Liquid nitrogen is a faster and more efficient way to screen and test electronic components and circuit boards.

2. Low temperature ball grinding technology

Low temperature planetary ball mill is to continuously input liquid nitrogen gas into the planetary ball mill equipped with an insulation cover. These cool air will absorb the heat generated by the high-speed rotating ball grinding tank in time, so that the ball grinding tank containing materials and grinding balls is always in a certain low temperature environment. Necessary equipment for mixing, grinding, new product development and small batch production of high and new technology materials in low temperature environment. The product is small in size, full in function, high in efficiency, low in noise, widely used in medicine, chemical industry, environmental protection, light industry, building materials, metallurgy, ceramics, minerals and other departments.

3. Superconducting technology

The advantaged characteristics of superconductor make it possible to be widely used in various fields. Using liquid nitrogen as superconductor instead of liquid helium as superconducting refrigerant to obtain superconductor makes superconducting technology to develop and apply on a large scale.

4. Green cutting technology

Low temperature cutting is the use of low temperature fluid such as liquid nitrogen, liquid carbon dioxide and cold air jet to the machining system of the cutting area, resulting in the cutting area of local low temperature or ultra-low temperature state, the use of the low temperature brittleness of the workpiece under low temperature conditions, improve the workpiece's machinability, tool life and surface quality. There are two main applications of liquid nitrogen cooling cutting. One is to spray liquid nitrogen directly into the cutting area by using bottled pressure. Another is the use of liquid nitrogen heat evaporation cycle to indirectly cool the tool or workpiece. At present, low temperature cutting is mainly used in the processing of refractory materials such as titanium alloy, high manganese steel and hardened steel.

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