The basic principle of tungsten carbide rotary atomizing nozzle is that provides liquid for high-speed rotation center so that the liquid surrounding the rotating element or thrown bore, it is by means of centrifugal force and air power to atomize. When the flow is small, the centrifugal force is stronger than the liquid surface tension, and turntable edge throws a few large droplets and divides directly.

While the flow and speed increases, the liquid is drawn into much filamentous flow and becomes very unstable. The liquid leaving the rim at a distance due to the effect of friction with the surrounding air is separated into small droplets. As the flow and speed increases to a certain extent, the liquid film becomes thinner outwardly extended, and separated from the friction with the surrounding atomization at the same time.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Compared with straight-flow atomizing nozzle, centrifugal nozzle working principle is more difficult. In the beginning, the given velocity of liquid is low, the liquid surface tension and inertial force plays an important role. Even if liquid surface tension is stronger than inertial force, liquid film shrinks into vacuole, it will still break up and become drops under aerodynamic. With the increasing pressure and spraying speed, film liquid will become instable and break up because of inertial force. Finally, the ribbon-shaped film liquid will vibrate against air movement so that liquid surface tension and viscosity become weaker gradually, and atomizing under higher pressure.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

According to atomizing type, they can be divided into pressure atomizing nozzle, rotary atomizing nozzle and media atomizing nozzle. Tungsten carbide pressure atomizing nozzle will spray flow to steady or low-speed airflow for atomizing under high fluid pressure. While different structures of ways inside have different atomizing process, they can be specifically divided into straight-flow atomizing process and centrifugal film-liquid atomizing process. The straight-flow atomizing process is simple, which includes liquid surface tension, viscosity and air resistance. Liquid turns drops, smooth flow and wavy flow into atomization gradually.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

The influence of welding time for quality: In a short time, the welded surface fully physical contact gradually, and diffusion of atoms become sufficient, welding shear strength and welding rate increases by welding time steadily. However, when the strength of soldering seam reaches the strength of tungsten carbide, if adding welding time continuously, it will make tungsten carbide particles become bigger and bigger so that some micro-bore will appear and the strength of soldering seam will decrease, which because of the different spreading speed between Co and Ni. Therefore, reasonable welding time is a guarantee for improving the soldering seam strength.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

The influence of welding temperature for quality: Welding temperature plays a significant role in welding plastic deformation, enlarging the contact area between two welding surfaces, accelerating spreading process and improving the strength and compactness of soldering seam. In addition, with the welding temperature increasing, the strength of soldering seam will improve gradually. When the temperature is running up to a certain value, the yield strength of material will remarkably reduce, the contact areas will rapidly increase and welding rate will improve a lot.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

In order to improve drilling efficiency, people invented a kind of nozzle, which is longer and closer to the button. The jet-flow impacts the bottom and disperses, its the fluid up and down do not interfered, which can effectively enhance drilling rate of 28%. However, the nozzle inside structure is too complicate to manufacture by normal compression molding. So some researchers used heat pressing impregnate-powder casting to attempt.

But the materials contain Cu and other soft metals, which decreases the hardness, anti-corrosion of nozzle and shortens the lifespan. Therefore, a new method brazing after compression section molding appeared. It still remains some problems that the strength of soldering seam is not good, which replaced by vacuum welding procedure.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Promote exploration mineral and get more resources

During these years, the exploration of minerals has been commercialized in Ganzhou. The government encourages enterprises to invest in it. Through minerals exploration carried out by geological survey department and companies, the deposit of tungsten in Ganzhou has been proved much bigger than ever before. In June of 2004, China Geological Survey Bureau held the Strategic Seminar on Gannan geological exploitaion Plan, and confirmed Ganzhou as the national strategic area of tungsten exploration. A new project of mineral exploration was launched and supported financially by the Ministry of Land and Resource. A geological research base and post-doctorial work station were set up here by Chinese Academy of Geological Science. They are studying the regulation of tungsten formation on the conditions of special structure. This is a good basis of talents and technologies for minerals exploration.

 

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Promote the reform of enterprises and develop tungsten industry

The private and shareholding enterprises prospect in Ganzhou, whose production occupied 80% of that in the whole tungsten metallurgy and processing industry. There are Chongyi Zhangyuan Tungsten Co., Ltd. whose business covers mining, dressing, metallurgy, down stream products processing, research and development, import and export; Ganzhou Tejing Tungsten and Molybdenum Company which cooperated with the stock listed company of Tianjin Tejing Material Co., Ltd.; Ganxian Shirui Mineral Co., Ltd. which cooperated with foreign companies to do mining in the other province and even abroad; Jiangxi Yaosheng Industry and Trade Co., Ltd. which based on the resources to extend the down stream products processing. These companies are vivid with much more potential of development and find their own position in Chinese tungsten industry as well as become the leading force of Ganzhou tungsten industry.

As an outstanding representative, Mr. Huang Zelan, the president of Chongyi Zhangyuan Tungsten Co., Ltd., was elected as a national model. 

 

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Promote the reform of enterprises and develop tungsten industry

As state-owned enterprises reforming, China Minmetals Non-ferrous Metals Co. Ltd. cooperated with Jiangxi Rare Earth and Rare Metals Tungsten Group Corporation and set up a joint venture, Jiangxi Tungsten Group Co. Ltd. in 2002. As a comprehensive group company, most of its mines and smelting companies all have tungsten as their main business area and have a good reputation both in domestic and foreign markets.

Jiangxi Rare Earth and Rare Metals Tungsten Group Corp. has also established some other cooperated companies like Jiangxi TOSHIBA Electro Materials Co.,

Ltd., Jiangxi Xinsheng Tungsten Co., Ltd., Ganzhou Yuanchi New Materials Co., Ltd., Jiangxi Youtai Tungsten Co., Ltd., and so on. Old enterprises radiate great vitality.

Xiamen Tungsten Group Corp. invested and held shares of Ganzhou Tungsten and Molybdenum Materials Factory to form Ganzhou Hongfei Tungsten and Molybdenum Materials Co., Ltd. The new company has moved to the industrial zone and begins to develop and produce new products.

 

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Strengthen management and enhance enterprises self-discipline

Following the Forum on Development Strategies for Chinese Tungsten Industry held in Oct. 2004, in Changsha, Hunan Province, a seminar on development strategies for tungsten industry in Ganzhou, China, was hosted by Ganzhou government.

Representatives presented many practical and scientific proposals. From Jan. to May of 2005, the price of tungsten concentrate increased from RMB ￥25,000 to RMB ￥135,000 per ton and kept at a steady status. Since 2004, the price of tungsten concentrate has kept at around RMB ￥100,000 per ton.

In Dec. 2005, Ganzhou Tungsten Industry Association was founded. It gives the same offer to the market and tries to keep the market in order. The tungsten industry has gotten a situation of cooperation, self-discipline.

In Sept. 2006, Mr. Liu Cong, the vice mayor of Ganzhou government, led the delegation from Ganzhou tungsten enterprises to attend the 19th annual meeting hosted by International Association of Tungsten Industry, held in Boston, USA. He gave a speech of “Ganzhou tungsten industry and its development”, which introduced Ganzhou tungsten industry to the world.

 

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn