Keep the molybdenum wire in a cool and ventilated place with low humidity, and keep the temperature at 20 ℃ ~ 25 ℃ as far as possible to avoid oxidation of molybdenum wire; Molybdenum wire may have poor verticality when it is placed for more than 6 months.

Molybdenum is hard, soft and tougher than tungsten. Molybdenum has high modulus of elasticity, tungsten, tantalum and only high melting point. Molybdenum plate is used in many special steels.

The wall thickness of heat-conducting pipe is determined by using conditions, material of tube sheet, construction ability of expanding operation and welding technology of pipe end.

Basic uses: About 50% of tungsten ore mined in the world is used for smelting high-quality steel, about 35% for producing hard steel, about 10% for tungsten wire and about 5% for other uses.

Tantalum has a wide range of applications because of its characteristics. Tantalum can be used as a substitute for stainless steel in the equipment for making various inorganic acids, and its service life can be increased dozens of times than that of stainless steel.

Smelting method: Ta-Nb ore is often accompanied by many metals. The main steps of Ta smelting are decomposing concentrate, purifying and separating Ta and Nb to produce purified compounds of Ta and Nb, and finally producing metal.

At present, titanium reactor can be divided into pure titanium reactor, composite titanium reactor and lining titanium reactor, which are used in different process environments. Composite titanium reactor is widely used because of its superior performance and lower price than pure titanium reactor.