Metallurgical industry：

Rare earth metals or fluorides and silicides added to steel can play the role of refining, desulfurization, neutralization of low melting point harmful impurities, and can improve the processing performance of steel; rare earth ferrosilicon alloys and rare earth silicon magnesium alloys are used as nodularizing agents to produce rare earths Ductile iron.

Since this ductile iron is especially suitable for the production of complex ductile iron parts with special requirements, it is widely used in machinery manufacturing such as automobiles, tractors, and diesel engines.

The addition of rare earth metals to non-ferrous alloys such as magnesium, aluminum, copper, zinc, and nickel can improve the physical and chemical properties of the alloy and improve the mechanical properties of the alloy at room temperature and high temperature.

Petrochemicals:

The molecular sieve catalyst made of rare earth has the advantages of high activity, good selectivity and strong anti-heavy metal poisoning ability, so it replaces the aluminum silicate catalyst for the petroleum catalytic cracking process.

In the process of synthetic ammonia production, a small amount of rare earth nitrate is used as a co-catalyst, and its processing gas volume is 1.5 times larger than that of nickel-aluminum catalyst.

In the process of synthesizing cis-butadiene rubber and isoprene rubber, the naphthenic acid rare earth-triisobutyl aluminum type catalyst is used, and the obtained product has the advantages of less glue hanging on the equipment, stable operation and short post-treatment process.

The composite rare earth oxide can also be used as a catalyst for purifying the exhaust gas of an internal combustion engine, and cerium naphthenate can also be used as a paint drier.

Glass ceramic：

Rare earth oxides or processed rare earth concentrates can be widely used as polishing powders for polishing optical glass, spectacle lenses, picture tubes, oscilloscope tubes, flat glass, plastics and metal tableware.

In the process of melting glass, cerium dioxide can be used to have a strong oxidizing effect on iron, reducing the iron content in the glass, so as to achieve the purpose of removing green in the glass.

Adding rare earth oxides can make optical glass and special glass for different purposes, including glass that can pass infrared rays, absorb ultraviolet rays, acid-resistant and heat-resistant glass, and X-ray-proof glass.

Adding rare earth to ceramic glaze and enamel can reduce the cracking of the glaze and make the products show different colors and luster, which is widely used in the ceramic industry.

New Material：

Rare earth cobalt and NdFeB permanent magnet materials have high remanence, high coercivity and high magnetic energy product, and are widely used in electronics and aerospace industries.

Garnet-type ferrite single crystals and polycrystals composed of pure rare earth oxides and ferric oxide can be used in microwave and electronic industries.

Yttrium aluminum garnet and neodymium glass made of high-purity neodymium oxide can be used as solid laser materials; rare earth hexaborides can be used to make cathode materials for electron emission.

Lanthanum nickel metal is a newly developed hydrogen storage material in the 1970s; lanthanum chromate is a high temperature thermoelectric material; The superconductor was obtained in the region, which made a breakthrough in the development of superconducting materials.

Others:

Rare earths are also widely used in lighting sources, projection TV phosphors, intensifying screen phosphors, trichromatic phosphors, and copy lamp powders; in agriculture, applying trace amounts of rare earth nitrate to field crops can increase their output by 5~ 10%; in the light textile industry, rare earth chlorides are also widely used in tanning fur, fur dyeing, wool dyeing and carpet dyeing.