production technology and technology of tungsten copper alloy

Tungsten eletrode mining lack of total amount control, production is still serious. Advantage for the protection and rational utilization of tungsten mineral resources, starting in 2002, the state shall practise a planned according to the protective exploitation of specified minerals mining rules, the comprehensive research resource reserves, existing in exploration right or mining right Settings and trend at home and abroad market demand conditions, the tungsten mining total amount control Molybdenum tube, and gradually to increase resources tax and stricter mining system and a series of measures, but these measures to carry out the effect is not ideal, tungsten concentrate yield levels every year. Excessive amounts of the main reason, it is a standard part mainly from local collective and private small mines, the mine regardless of the index limits, blind expansion; Second is the name of the other minerals mining tungsten; Three is in big mines around still exist some phenomenon of illegal mining.
Resource comprehensive utilization level needs to be improved. Tungsten after nearly a century of mining in our country, at present, the most black tungsten resources in China has almost dried up. Mining enterprises to reduce costs, there is a rich abandon poor phenomenon, individual companies or even back to the manual, half manual work, resource recovery rate is low. Enterprises, especially small tungsten mountain is basically all the individual owners lease contract operation, low technical quality, the pursuit of short-term interests, mining rich abandon poor, difficult to pick by master abandon time, easy to abandon the predatory exploitation of phenomenon is common, waste resource loss is great, beneficiation process simple, low efficiency, adopted by the recovery of tungsten concentrate, only accompanying the rest of the most valuable metal is not recycled, not only the recovery rate of tungsten is extremely low, many associated metal elements is wasted. Individual companies even not built or built after not using tailings, discarding the backfilling of tungsten and the grade of the valuable metals are high, with associated also did not get reasonable utilization of resources, low comprehensive utilization of resources. Abandonment of backfilling materials not only caused the waste of resources, also caused many environmental problems.
Mining science and technology input, less acquisition technology and equipment level is not high. Lack of tungsten dressing technology research input, loss of many professional and technical personnel, technical level is unbalanced development, mining of innovation ability is not strong. Tungsten beneficiation research is less, the basis of new separation equipment research and development also largely stalled, part of the refractory ore beneficiation technology is still no new breakthroughs, such as the weathering scheelite recovery has struggled to get good results. Hard to choose black and white tungsten mixed ore dressing technology is not perfect, still has larger ascension space in ore dressing indexes. Exchange of experience and tungsten mines abroad processing technology also very few. For tungsten beneficiation dressing plant, foreign technology understand less, not to mention the introduction of advanced technology absorption.