I. Development Goals

Keeping the scientific concept of development, the government of Ganzhou will develop tungsten industry by optimizing structures and innovation. Then in the coming 5 years, we strive for the objectives of the output value reaching 20 billion RMB per year and rapid, healthy and sustainable development.

II. Development Direction

Based on present technologies, we are striving for the output of tungsten products taking 1/3 portion or more of the total output in China. And we also will develop heavy alloy, W-Cu alloy, hard facing materials and tungsten special steel and its applications etc.

III. Development strategy

To form the main developing region of Ganzhou tungsten industry by putting Ganzhou City area as the developing center, Chongyi, Dayu, Ganxian as the main region. To expand industrial cluster by relying on the leading enterprises around several industry chains. Thus, Ganzhou will construct the tungsten industrial system featuring efficiency, resource-saving, environment-friendly, rational structure and international market competitiveness.

 

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The spraying distance ensures that the smallest rebound degree and the best strength, which plays a significant role in rock cracking. In general, it requires intensive compound and a rebound degree, which is as small as possible. If the spraying distance is inappropriate, the greater pressure can not improve the efficiency of rock cracking even if it exceeds the threshold pressure of rock.

There is a scope of the spraying distance, which is normally 5-6 times longer than the equivalent diameter of nozzle. The main reason is that the flow is independent and inadequately mixed with other flows in a small range of spraying distance. When the spraying distance exceeds a certain range, the flow will be blocked by surrounding media so that the energy is decreasing until it is lower than the threshold pressure for rock cracking, which reduces the efficiency.

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The principle of hydraulic sand-blasting technology is that put grains into tube for forming the sand flow. And it takes advantage of the impact of sand to enhance the ability of cutting and rock cracking, which is a kind of new technology that as known as low permeability reservoir reform developing recent years. However, the nozzle is the essential part of it, which are easily abrased by hydraulic sand-blasting flow. Therefore, the lifespan of nozzle has been shortened and the efficiency has been reduced.

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Related experimental statistics showed that with the rising of the nozzle pressure drop, cracking volume increased linearly. At the same pressure drop conditions, the aperture of porous nozzle for rock cracking is similar, mainly affected by the bore distribution and less by the outside aperture. In addition, the pressure drop enlarges the rock volume caused by the bore depth increase, and the increasing pressure drop will improve the effective spraying distance. There is a best spraying distance, which has enough impact energy and can cover almost of area.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
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