Effect of Temperature and Amount of Flux in a Charge on Structure and Phase Composition of Balkhash Copper Smelter Plant Slags

Metallurgist - Samples of converter slag of the Balkhash copper-smelting plant (BMZ), taken during their discharge from a converter, and experimental samples after conversion under laboratory...     

Processing Converter Slags with Total Utilization of All Components

Metallurgist - Currently, almost all plants converted to autogenous smelting of copper-containing concentrates use flotation of converter slags (CS) while leaving 0.55–0.90% Cu in tailings...     

Recovery of rare earth metals (REMs) from primary raw material: sulphatization-leaching-precipitation-extraction

The present study is devoted to the extraction of rare-earth metals (REMs) from a high-silica ore found in one of the deposits in Kazakhstan. The ore was processed in a mixture with sulfuric acid at 200°C (sulphatization) and subsequently followed by water leaching of the sulphate product (sinter), REMs were extracted into the solution. Precipitation of the REMs-containing hydrate product from the sulfate solution was carried out with sodium hydroxide. In order to obtain the REMs-containing nitrate solution, the precipitate was dissolved in nitric acid. REMs solvent extraction from nitrate solutions was carried out with tributyl phosphate (TBP).     

Synthesis of Porous Tungsten from Tungsten–Cadmium Film Coatings

Solid solutions (alloys) with a Cd concentration of 50.3–76.3 at % were synthesized for the first time in the form of coatings by ion–plasma sputtering and codeposition of ultrafine W and Cd particles. When coatings were formed by tungsten and cadmium nanolayers, the components dissolved mutually to produce solid solutions of one metal in the other. A solid solution of cadmium in tungsten was synthesized at Cd concentrations up to 60.9 at %. At a cadmium concentration of 68.6 at % in the coating, the crystalline structure of cadmium with an admixture of amorphous tungsten was produced. At 800°C, tungsten evaporated from tungsten–cadmium coatings to form porous tungsten. The results of examination of materials fabricated on the basis of porous tungsten are planned to be used in practice.     

Whisker microcrystals on the surface of tantalum–cadmium alloy films

Technical Physics Letters - Whiskers crystals were discovered in the tantalum–cadmium (56.6 at % Cd) solid solutions formed by in-turn deposition of the superfine tantalum and cadmium...     

Crystal Structure and Thermodynamic Properties of Barium–Thulium Bismuthate with Perovskite Structure

A new sample of triple oxides—barium–thulium bismuthate Ba₂TmBiO₆ with perovskite structure—has been synthesized by ceramic technology. The unit cell parameters of the sample and the coefficients of thermal expansion have been determined by the method of X‐ray analysis. Thermal properties of the sample have been studied by DTA over the temperature range of 293–1473 K. The heat capacity of the compound has been measured over the range of 5–320 K by vacuum adiabatic calorimetry. Thermodynamic functions of the compound have been determined based on the heat capacity data.