The Technological Development of Tungsten
Tungsten is 1781 by the Swedish chemist Scheele discovered. By the early 1900s, due to its development of a range of applications, such as Tungsten was first exhibited in 1900 as an alloying element in the production of high-speed steel and Tungsten bulbs using the World Exposition in Paris; 1927-1928 developed into a Tungsten -based sintered hard quality alloys, Tungsten metallurgy industry began to produce and develop.
Tungsten products in order to meet the increasing user demand for quality, lower costs, reduce pollution of the environment, Tungsten metallurgy technology has made great progress, new advanced technology completely replace traditional techniques. Mainly in the following areas:
Tungsten mineral raw materials decompose, the early industrialization of the Soviet suppression of cooking to become not only efficient handling of scheelite, in low-grade scheelite ore, while capable of handling mixed black and white Tungsten ore; Based on the theoretical study was a breakthrough on NaOH ( sodium hydroxide ) decomposition by only handle low calcium wolframite developed into treatments include scheelite, refractory Tungsten ore mineral raw materials, including a variety of general-purpose technologies. Of course, with the phasing out of the NaOH melt legitimate, low efficiency sintering soda, hydrochloric acid decomposition method, serious environmental pollution traditional methods. While also reducing the requirements for beneficiation , greatly improved resource utilization.
In terms of pure Tungsten compound preparation, crude Na2WO4 solution strongly basic anion exchange purification and transformation processes, and short process, low cost , and high quality products in a wide range of magnesium to replace the classic purification - traditional chemical transformation processes. With corresponding quaternary want extraction and purification of transition from laboratory research began to move toward industrialization, presents a welcome prospect. In addition to the selective precipitation of molybdenum, tin, antimony, arsenic and other high technology research and development success Impurity from Tungstate solution and widely used, greatly improve the purity Tungsten and Tungsten products for metallurgical process materials adaptability.
In terms of the metal Tungsten powder preparation, in the 1970s, advanced hydrogen reduction of Tungsten blue replaced the yellow Tungsten hydrogen reduction process, to the 20th century, purple Tungsten hydrogen reduction method further replaced by hydrogen reduction of Tungsten blue, so that production the physical properties of Tungsten powder of control to achieve a more advanced level, to further improve the overall quality of Tungsten powder.
At the same time, a variety of processing Tungsten metallurgy technology successfully developed secondary resources, make use of Tungsten secondary resources both in the technical level or on the utilization of the recovery are greatly improved.
Science and technology are primary productive forces, Tungsten resources as an important strategic material is an important resource of the world, must be reasonable utilization cycle.
Tungsten products in order to meet the increasing user demand for quality, lower costs, reduce pollution of the environment, Tungsten metallurgy technology has made great progress, new advanced technology completely replace traditional techniques. Mainly in the following areas:
Tungsten mineral raw materials decompose, the early industrialization of the Soviet suppression of cooking to become not only efficient handling of scheelite, in low-grade scheelite ore, while capable of handling mixed black and white Tungsten ore; Based on the theoretical study was a breakthrough on NaOH ( sodium hydroxide ) decomposition by only handle low calcium wolframite developed into treatments include scheelite, refractory Tungsten ore mineral raw materials, including a variety of general-purpose technologies. Of course, with the phasing out of the NaOH melt legitimate, low efficiency sintering soda, hydrochloric acid decomposition method, serious environmental pollution traditional methods. While also reducing the requirements for beneficiation , greatly improved resource utilization.
In terms of pure Tungsten compound preparation, crude Na2WO4 solution strongly basic anion exchange purification and transformation processes, and short process, low cost , and high quality products in a wide range of magnesium to replace the classic purification - traditional chemical transformation processes. With corresponding quaternary want extraction and purification of transition from laboratory research began to move toward industrialization, presents a welcome prospect. In addition to the selective precipitation of molybdenum, tin, antimony, arsenic and other high technology research and development success Impurity from Tungstate solution and widely used, greatly improve the purity Tungsten and Tungsten products for metallurgical process materials adaptability.
In terms of the metal Tungsten powder preparation, in the 1970s, advanced hydrogen reduction of Tungsten blue replaced the yellow Tungsten hydrogen reduction process, to the 20th century, purple Tungsten hydrogen reduction method further replaced by hydrogen reduction of Tungsten blue, so that production the physical properties of Tungsten powder of control to achieve a more advanced level, to further improve the overall quality of Tungsten powder.
At the same time, a variety of processing Tungsten metallurgy technology successfully developed secondary resources, make use of Tungsten secondary resources both in the technical level or on the utilization of the recovery are greatly improved.
Science and technology are primary productive forces, Tungsten resources as an important strategic material is an important resource of the world, must be reasonable utilization cycle.
stevia - 12. Dez, 07:44
