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This article presents the technology for producing red phosphorus from white phosphorus using temperature. The article contains an analysis of currently available technologies for the production of red phosphorus, scientific research by world scientists, parameters of the red phosphorus production process, laboratory analyzes of red phosphorus obtained as a result of experiments, X-ray diffraction analysis (XRD), electron paramagnetic resonance (EPR), conclusions based on the results analysis, temperature dependence of the concentration of paramagnetic centers, particle sizes of red phosphorus. [ABSTRACT FROM AUTHOR]

Physico-chemical processes of argon-chloride roasting taking place in raw charge for obtaining lightweight porous aggregate - agloporite on the basis of flotation tailings from copper enrichment plants have been studied. The influence of temperature and duration of the roasting process as well as the influence of the amount of added sulphochloride additive consisting of phosphogypsum and chloride-containing alkaline waste of soda production on the extraction degree of noble and residual metals was studied and the optimum conditions of metal extraction were determined. It is shown that the maximum extraction of residual metals at the charge firing with the addition of up to 30% of phosphogypsum and chloride-containing alkaline waste of soda production with the optimum temperature of 1100-1150 0C and holding time of 30-40 minutes makes 92.9 - 98.8%. It has been established that temperature, duration of chlorination time, amount and type of chlorinating waste have a significant influence on the degree and rate of metal chloride distillation. [ABSTRACT FROM AUTHOR]

In the Republic of Karakalpakstan, there are explored large reserves of unprocessed hard rock raw materials, which necessitates the development and targeted support to the building materials production industries, which can become one of the driving forces of economic growth, further modernization and diversification of the regional industry. In this article, the chemical and mineralogical compositions of tufobreccia rock of the Duschibulak deposit have been studied by a number of physical and chemical methods of analysis. The results of determining the mineralogical composition of the averaged technological sample of tufobreccia rock of Duschibulak deposit are in good agreement with the data of chemical analysis. Electron microscopic studies have shown that tufobreccia texture and structure is characterized by the presence of angular clasts of lava and cementitious mass in the rock, which are different from the clasts, where the presence of rhombohedral protrusions characteristic of quartz was revealed. The chemical composition of tufobreccia rock of the Duschibulak deposit in terms of the content of regulated oxides (SiO2=67.2; Al2O3+TiO2=15.75; Fe2O3=5.00; CaO=2.33; MgO=2.30; SO3=sl; R2O=2.25) % meets the requirements of O'zDSt 2950: 2015 to the chemical composition of aluminosilicate (clay) raw materials used in the production of Portland cement clinker. The content of tuffobreccia chloride ion in the sample-0.15 %. [ABSTRACT FROM AUTHOR]