DOI: 10.18503/1995-2732-2020-18-1-31-39
Abstract
Problem Statement: Due to a reduced number of the developed tungsten deposits, Russian Federation is facing an urgent issue related to the recycling of tungsten-containing waste by using an efficient waste carbide recycling technique in order to reduce imports of tungsten raw materials, mainly from China. Objectives: To find optimum conditions that would make the carbide recycling process more efficient and cost-effective for manufacturers of carbide products. Originality: This study helped identify the process parameters affecting the process efficiency and confirm the applicability of the developed process, which is designed to turn real carbide waste into powder that can be used to produce new carbide products. The findings show that, in order to avoid the formation of “idle” zinc, it is recommended to reach the temperatures of 850–950°C in a decomposition reactor and inert gas in the pressure range from 0.5 to 1 atm should be used for the heating process, whereas the distillation and destruction processes should take place in vacuum at 4--5 Pa for 5–10 minutes. The vacuum creates an anti-oxidation environment and ensures the required degree of distillation. Findings: With the help of the developed recycling process and the corresponding reactor, carbide material can be completely decomposed at the rate 4-8 times higher than through any of the known alternative techniques and with minimum power consumed. Practical Relevance: Implementation of this process in our country will allow us to boost the efficiency of waste carbide recycling and thus reduce the imports of tungsten raw materials from other countries, mainly from China.
Keywords
Carbide materials, disposal, decomposition, waste recycling technology.
For citation
Trotsenko I.G., Gerasimenko T.E., Alkatsev V.M., Evdokimov S.I. Optimised Waste Carbide Recycling Technology. Part 2. Finding Optimum Implementation Conditions. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2020, vol. 18, no. 1, pp. 31–39. https://doi.org/10.18503/1995-2732-2020-18-1-31-39
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