Since the second half of 2000, according to the policy and plans of reformation for the whole national tungsten industries, Ganzhou city government has carried out a comprehensive research and made a decision to merge and reorganize the industry and, distributed it as a policy to the local governments to enforce. Therefore, Ganzhou tungsten industry turned to the right way of conforming resources to develop the whole industry.

Control the mining order by prohibiting illegal exploitation activities

For many years, Ganzhou government took effective measures to clean up illegal mining activities by stopping the supply of power, water and relevant mining materials to some mines, driving out thousands of illegally mining workers from mines, canceling hundreds of illegal mining places, and closing dozens of mines which were over-mined, cross-border-mined, and danger-hidden. Status of many mines sharing the same license and renting mines were held back. Thus the tungsten industry has been kept in order.

After effectively straightening, the problems of disordered mining have been solved basically, the orders of mining turned better. Ganzhou government strictly executed the national policy and yearly plan for tungsten concentrate producing by adopting measures of managing tungsten quota, controlling the supply of detonator materials, approving the confidential of artificial person and controlling the output strictly.

 

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Smelting, Processing and Related Industries

In 1952, Dayu Tin Plant produced composed scheelite successfully by using sintering method.

In 1958, Ganzhou Concentration Plant was established and started its production. After 1963, tungstic acid, APT, W powder, WC powder and cemented carbide could be produced too.

Then “Umbrella” brand APT produced by Ganzhou 801 Factory was sold to Japan, US, UK and France. But the output of the tungsten products was still less than 2,000 tons.

Ganzhou tungsten industry stimulated the development of mining equipment, meltallurgical equipment. Starting with only one repair factory, at present Ganzhou has 10 machine factories including metallurgy machine factory and mining machine factory, plus 17 machine factories owned by mines. The metallurygy chemical factories, led by 803 Factory, produced over 14t of all types of explosives.

Education and Scientific Research

In Ganzhou, education and research institutes for non-ferrous industry were well developed. In 1958, metallurgical ministry established Jiangxi metallurgical college (now Jiangxi University of Science and Technology). Afterwards, the Geology Ministry established Jiangxi Geology College. 

 

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The 20 years, when the Chinese opening and reform went deeper, was also an important period for the development of tungsten industrial system and tungsten processing in Ganzhou.

In Nov. 1981, the first national science conference of tungsten industry was held in Xihuashan tungsten mine of Dayu County. Mr. Fang Yi, the vice-premier at that time, made an important speech and presented his inscription “making efforts to develop tungsten industry”. Developing new applications and leading to the downstream products processing have been presented in this conference.

In 1984, Ganzhou Tungsten and Molybdenum Materials Factory was into production. By importing the technologies from Janpan, it developed tungsten powder, sintered bar, wire etc.. In the same year, some local tungsten metallurgy factories were set up and went into production.

During the middle and late 1980s, without control from the government, Ganzhou tungsten industry resulted in the situations of illegal exploration and mining, losing control of quality, smuggle and out-of-order competition.

At the beginning of 1990s, the price of tungsten was much less than the cost of mining. Ganzhou tungsten industry got into depression. Some newly-built tungsten smelting enterprises also met great trouble.

In the middle and late 1990s, as reformation going further, the private companies began their business in tungsten industry. Many companies and mines which were near to bankruptcy were merged and reorganized. Since then on, enterprises have been going better. In 2000, Ganzhou tungsten mines produced tungsten concentrate 22553 tons, and their sales value reached RMB 707 million and tax RMB 43.72 million. 

 

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Under normal circumstances, thorium tungsten electrode can act as positive electrode of carbon, stainless steel, or nickel alloy, or negative electrode of titanium alloy. Because it has excellent operational performance, so even in overload current, it can also work well.

Thorium tungsten electrode applied in direct current welding field and pure tungsten electrode is for AC welding. Before the welding process, the staff should read the thorium tungsten electrode instructions carefully.

Thorium tungsten electrode applied in carbon and stainless steel field. Thorium oxide content of 2% in thorium tungsten electrode is usually better than 1% of oxide content in improving its operational performance. When using thorium tungsten electrode in AC welding, the speed should be faster, and it should be used with caution in order to direct current welding react before AC welding. When in AC welding, ball balled would not melt, so the effect is not so well as liquid ball.



 

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