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2023
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Process information for rare metals
Source: Network
Release time：2023-10-12 14:27
smelting technology
The content of rare metals in the earth's crust is not very small. For example, the content of titanium, zirconium and vanadium in the earth's crust is greater than that of common non-ferrous metals nickel, copper, zinc, cobalt, lead and tin. Rare metals are often associated with other metals due to their occurrence and dispersion, and some special physical and chemical properties are often required to adopt special production processes. For example, the organic solvent extraction method and ion exchange method are used to separate and extract lithium, rubidium, cesium, beryllium, zirconium, hafnium, tantalum, niobium, tungsten, molybdenum, gallium, indium, thallium, germanium, rhenium, lanthanide metals, actinide metals, etc; extraction and separation or reduction of titanium, zirconium, hafnium, tantalum, niobium and rare earth metals by chlorination metallurgy; high purity titanium, zirconium, hafnium, vanadium, uranium, thorium, etc. by iodide thermal decomposition method. A series of metallurgical technologies such as vacuum sintering, arc melting, electron beam melting and plasma melting have been widely used to refine rare metals, especially rare refractory metals. Zone smelting technology has been an effective means of producing high purity scattered metals and rare refractory metals.
With the progress of science and technology and the development of metallurgical process, equipment and analysis and detection technology and the expansion of rare metal production scale, the purity of rare metals is also constantly improving, the performance is constantly improving, and the variety is increasing, thus promoting the expansion of the application field of rare metals. Some metallurgical processes of rare metals, such as organic solvent extraction technology and chlorination technology, have also been gradually extended to the entire metallurgical field of non-ferrous metals. China is rich in rare metal resources, such as tungsten, titanium, rare earth, vanadium, zirconium, tantalum, niobium, lithium, beryllium and other proven reserves, are in the forefront of the world. China is gradually establishing a rare metal industrial system.
Storage conditions
Many varieties of rare metals have radiation and pollution effects, such as nickel, francium, radium, polonium, thallium and actinide, thorium, protactinium, uranium, etc., and their storage conditions must be non-open warehouses. If they are soaked by rain and then flow into the ground, they will pollute drinking water sources. The storage warehouses should be far away from residential areas, schools and hospitals.
In addition, individual heavily radioactive metal storage areas should be left from the urban area and stored separately after being wrapped in multiple layers of lead barrels.
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