Investigation of the sorption method of processing molybdenum-containing raw materials to extract rare metals

The article investigates the sorption method of concentrating rare metals on various sorbents (brands “Purolight”: A-100, A-170, A-172 and BO-020) and determines the optimal conditions for their extraction. It is shown that the extraction of molybdenum on the sorbent “Purolight A-100” was 98%. The proposed sorption mechanism consists in the formation of molybdenum complexes with functional phosphor basics and sulfate groups of sorbents. Sorption of rhenium on the Purolite A-170 sorbent was 93%. Sorption of rhenium on the sorbent BO-020 is described by the Langmuir equation with a maximum static exchange capacity of 94%. Based on the sorption and desorption kinetics of molybdenum and rhenium on various ion-exchange sorbents, it was shown that the sorption of molybdenum and rhenium proceeds most efficiently on low-basic anion exchangers A-100 Mo and A-170, respectively, and after double recleaning of the “rough” rhenium concentrate, ammonium rhenium of qualification was obtained AR-0

Influence temperature and strong magnetic field on oscillations of density of energy states in heterostructures with quantum wells Hgcdte/Cdhgte

For the first time, the influence of temperature and a transverse strong magnetic field on the oscillations of the density of energy states is studied in the conduction band of heterostructures with quantum wells HgCdTe/CdHgTe. Analytical expressions are derived for oscillations of the density of states in quantum-dimensional heterostructural materials in the presence of transverse quantizing magnetic fields with a parabolic dispersion law. A new mathematical model has been developed for calculating the temperature dependence of the density of states oscillations in nanosized heterostructural materials under the action of a transverse quantizing magnetic field

Temperature dependence of width band gap in Inxga1-Xasquantum well in presence of transverse strong magnetic field

This article investigated the temperature dependence of the width band gap in InxGa1-xAs quantum well in the presence of a transverse strong magnetic field. A new method was proposed for determining the width band gap of GaAs/InxGa1-xAs heterostructures based on a InxGa1-xAs quantum well in the presence of a magnetic field and temperature. An analytical expression is obtained for calculating the width band gap of a rectangular quantum well at various magnetic fields and temperatures

Research of Timing Taken to Receive Cotton From the Transport of the Plph-iii Installation

Low productivity was studied due to design shortcomings of PTX-20, PL and PLPX-III devices. By replacing the cotton-free transport on the existing PL device, the operation efficiency of the device is reduced by an average of 17% in the process of putting the next cotton transport. It was studied that the absence of cotton in stock in transport reduces the efficiency of the device by 50% when increasing the efficiency of the device to 30 t / h. It is necessary to set the cart to a continuous shed for continuous reception of cotton by eliminating the free time in the receiving-transfer device. At the same time, it was studied that the size of the bunker should be optimal, taking into account the amount of cotton in the cart. As a result of the study, it was found that the coefficient of spread of cotton varies from 1.0 to 1.5 K and the capacity of the device at 30 t / s, the volume of the bunker is from 8.3 to 12.5 m3. it was determined that a transmission device should be introduced

Machine-building anti-corrosion composite polymeric materials and coatings based on local raw materials and production waste

The article discusses the results of a study on the development of effective compositions of anticorrosive composite polymer materials and coatings filled with organic-mineral ingredients based on epoxy resins ED-16 and ED-20. The compositions of the developed anticorrosive polymer compositions and the main physical-chemical and mechanical properties of the developed anticorrosive compositions based on oligomers and other organic-mineral ingredients are given

Temperature dependence of width band gap in

This article investigated the temperature dependence of the width band gap in InxGa1-xAs quantum well in the presence of a transverse strong magnetic field. A new method was proposed for determining the width band gap of GaAs/InxGa1-xAs heterostructures based on a InxGa1-xAs quantum well in the presence of a magnetic field and temperature. An analytical expression is obtained for calculating the width band gap of a rectangular quantum well at various magnetic fields and temperatures