Recently, the innovative alumina production technology developed by the special metallurgical innovation team led by Professor Zhang Ting'an of Northeastern University solved the worldwide problem that the red mud cannot be economically viable. Through the identification of the China Nonferrous Metals Industry Association, the two invention technologies have reached the international lead. How to effectively use low-grade bauxite in China has always been a technical bottleneck problem in China's alumina industry. The special metallurgical innovation team led by Professor Zhang Ting'an of Northeastern University after more than 10 years of painstaking research has fundamentally solved the large-scale, low-cost, harmless, and resource-based utilization of red mud, and its innovative technology is the subversive of alumina production. technology. It has been estimated that if China adopts this technology, alumina production can achieve an additional annual economic benefit of 500 billion yuan. If the existing Bayer process red mud is used in this method, it can produce an economic benefit of nearly 100 billion yuan, which is significant. Social and economic benefits. At present, two technical inventions have formed 15 serial invention patents and 2 international PCT patents, and have established a pilot test scale of 50,000 tons in the laboratory.
Ferroalloys, a
broadly defined ferroalloy is a product that is used as a deoxidizer, elemental
additive, etc. in steelmaking to add iron to certain properties or to meet
certain requirements.
Property: The main element of the ferroalloy generally
has a high melting point, or its oxide is difficult to reduce, and it is
difficult to refine the pure metal. If it is together with the iron, it is
easier to reduce the smelting. The use of ferroalloys in iron and steel
smelting, in which iron is not only harmless, but because of the fusing of
molten steel is more favorable. Therefore, deoxidation and alloying in the
steelmaking process are mostly added in the form of iron alloys. Iron alloys
are generally brittle and cannot be used as metal materials.
Purpose: As a deoxidizer for steelmaking, silicon
manganese, ferromanganese and ferrosilicon are the most widely used . As strong
deoxidizers, aluminum (aluminum iron), silicon calcium, silicon zirconium, etc
are used . Commonly used alloy additives
are: ferromanganese, ferrochromium, ferrosilicon, ferrotungsten,
ferromolybdenum, ferrovanadium, ferrotitanium, ferronickel, niobium (neodymium)
iron, rare earth iron alloy, ferroboron, ferrophosphorus and so on. A variety
of ferroalloys, in accordance with steelmaking needs, are regulated in many
grades based on the content of alloying elements or the level of Carbon
contained, and the impurity content is strictly limited. Ferroalloys containing
two or more alloying elements are called composite ferroalloys. The use of such
ferroalloys can add deoxidizing or alloying elements at the same time, which is
beneficial to the steelmaking process and enables the more comprehensive and
efficient utilization of symbiotic ore resources. Commonly used: manganese
silicon, silicon calcium, silicon zirconium, silicon manganese aluminum,
silicon manganese calcium and rare earth ferrosilicon.
Ferroalloys Ferroalloys,Ferro Silicon,Ferro Tungsten,Different Shape Ferroalloys Hwa Seng Resources (Hong Kong) Co., Limited , https://www.hwaseng-resources.com