All in all, there are about 60 million vanadium deposits in the world, 90% of which are localized in the territory of the five countries: Russia, South Africa, Venezuela, the United States and China. Sulfuric acid production is the main consumer of vanadium in the form of vanadium catalysts (V2 O5 pentoxide). The demand for vanadium and its compounds keeps growing every year, as a result of the increased interest in processing of secondary vanadium-containing raw materials. One of the main sources of vanadium are the spent vanadium catalysts – SVC. About 100 thousand tons of spent vanadium catalysts are formed throughout the country, which are considered to be potentially hazardous for the environment and local population. Disposal of spent vanadium catalysts used for oxidizing of sulfur dioxide represents a serious environmental threat due to the lack of effective technologies for their processing. This work is devoted to a method for processing of spent vanadium catalysts to obtain a stuff that will be suitable for modifying of steels. The pyrometallurgical method of processing of technogenic raw materials by oxidative fi ring has been investigated and the parameters of firing – optimal fi ring time and temperature for extracting vanadium from the material – have been identified.
| Mualliflar | Sh. N. Turobov, Abdurashid Hasanov, Doctor of Technical Sciences, Professor, Deputy Chief Engineer for Science AMMC Almalyk Mining and Metallurgical Combine |
|---|---|
| Jurnal | Илм-фан ва инновацион ривожланиш |
| Nashr sanasi | 2021-10-29 |
| Jild | 4 |
| Son | 5 |
| Betlar | 86-92 |
| Til | en |
| DOI | 10.36522/2181-9637-2021-5-9 |
DOI: 10.36522/2181-9637-2021-5-9 · Maqolaning asl sahifasi
This article analyzes innovations at the national level and factors influencing it at macro level. Multivariate regression equation was used to take the volume of innovative products and services as well as the numbers…
The article examines and analyzes germination of seeds of varieties and samples of rice collection of the Rice Research Institute, at low temperatures (15° C). According to the findings, the local variety of rice…
This article provides information on the presented vacuum steaming method in place of the emulsifying method which is used to rewind raw silk. This method, envisages the use of a modern vacuum steaming machine of the…
The article examines the dependence of formation of new knowledge on the innovativeness of the educational sphere. The state-of-the-art of the higher education system in Uzbekistan and its compliance with innovative…
This scientific piece of work shows findings from tests of the technology designed for remote determination of the soil moisture in the use of drip irrigation system in Samarkand region. The average annual rainfall of…
The article reviews interrelation of wear speeds of the accelerating and decelerating gears’ teeth heads and legs, at an account of the ratio of a relative wear of the teeth depending on the number of gear teeth…
Safety and reliability of medical devices are becoming more emphasized as the time passess. Crisis situations such as COVID-19 have shown the negative eff ects that can be brought upon by lack of medical device…
In fact, the pathogenesis of the coronavirus disease has not been closely investigated, therefore frequent change of the virus strain keeps the clinic of the disease changing, the lack of a single therapeutic tactics…
This article examines the technology of production of special clothing designed for children during the treatment of orthopedic diseases, in particular such a disease as hip dislocation, analyzes the existing in our…
The article discusses the issues of measurements of water consumption in water management systems, which is regarded as one of the most pressing problems nowadays. The UR-6 A irrigation canal, which brings water from…