A method for efficiently treating tungsten-containing waste to produce coarse-grained tungsten powder
A technology of tungsten waste and coarse particles, which is applied in the field of efficient treatment of tungsten-containing waste to produce coarse tungsten powder, which can solve the problems of long reduction time, high energy consumption and high cost, and achieve the effect of simple equipment, low energy consumption and wide sources
Active Publication Date: 2019-02-22
青岛聚鑫园工贸有限公司
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Problems solved by technology
[0006] The disadvantages of the existing methods for preparing ultra-coarse tungsten powder are: the reduction time is long, the process control is difficult, the energy consumption is high, and the cost is also high, and it is still very difficult to prepare ultra-large coarse tungsten powder
Method used
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Embodiment 1
[0029] As shown in the figure, the tungsten alloy grinding material is used as the raw material, and its composition content is shown in Table 1, and the metal tungsten content is more than 45%.
[0030] Take 1kg of tungsten-containing grinding material, prepare a mixed solution of hydrochloric acid and sulfuric acid with a concentration of 10% (mixing ratio 1:1), then put 1kg into 5L mixed solution for pre-removal treatment for 30min, and the pre-removal temperature is 50°C , and then separate the solid and liquid to obtain the impurity removal liquid and the impurity slag, the impurity removal liquid is used for the extraction and recovery of valuable metals, the impurity removal slag is put into the muffle furnace for low-temperature oxidation roasting at 500°C for 4 hours, and the calcined sand weight is added after roasting 10% aluminum powder and sodium chloride, and 3% sodium nitrate and calcium fluoride by weight of calcined sand, mixed evenly, and pressed with a pressu...
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Abstract
The invention belongs to the field of metallurgy, and particularly provides a method for efficiently treating a waste material containing tungsten to produce coarse-particle tungsten powder. The method comprises the steps that the waste material containing the tungsten serves as a raw material, after impurities are pre-removed, low-temperature oxidizing roasting is carried out, then the waste material containing the tungsten is uniformly mixed with a reducing agent and an activating agent for compression molding, self-propagating high-temperature reaction is carried out in an inert atmosphere or in vacuum, and a reaction product is subjected to cooling, crushing and centrifugal separating so as to obtain the coarse-particle tungsten powder. The method has the advantages that the adaptability of the raw material is high, the taking range is wide, the technology and equipment are simple, the energy consumption is low, the efficiency is high, self-purification is realized, the purity is high, the recovery rate is high, no pollution is caused, and the method is suitable for industrial production.
Description
technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for efficiently processing tungsten-containing waste to produce coarse-grained tungsten powder. Background technique [0002] As a high-value rare metal, tungsten is widely used in manufacturing fields such as aviation, aerospace, shipbuilding, nuclear energy, metallurgy, machinery, automobiles, electronics, petrochemicals, and military industries. Due to the important status of tungsten resources and the scarcity of stock, both at home and abroad attach great importance to the recycling of tungsten waste, especially in the United States, Japan, Germany, Russia and other countries. HC Starck of Germany owns a transnational tungsten waste recycling network, and processes tungsten waste at Gesla Plant, forming regenerated tungsten which accounts for about 1 / 3 of the entire enterprise's tungsten raw materials; Russia has specialized regenerated nonferrous metals The I...
Claims
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IPC IPC(8): C22B34/36C22B7/00C22B1/02
CPCC22B1/005C22B1/02C22B7/00C22B34/36Y02P10/20
Inventor 冯国升冯相聚
Owner 青岛聚鑫园工贸有限公司