Allerton Press
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Investigations into optimizing the sulfatization of zinc cakes
Allerton Press - Tập 50 - Trang 47-51 - 2009
Tests on the treatment of zinc cakes were carried out according to the flow chart, including the sulfatization with oleum and leaching with the sulfuric acid solution.
Feasibility study for recovering waste heat in reduction system of Kroll process: Energy analysis and economic valuation
Allerton Press - Tập 58 - Trang 258-268 - 2017
The feasibility of developing a waste heat recovery system from waste hot air generated by the reduction system in Kroll process to pre-heat water is studied in this paper, in order to reduce energy loss. In the proposed system, the hot air from reduction reactor was first collected by pipelines with insulating material, and then supplies to a shell-and-tube heat exchanger to heat up water. And th...... hiện toàn bộ
Kinetics of hydrogen absorption by yttrium dihydride powder
Allerton Press - Tập 52 - Trang 125-127 - 2011
The kinetics of hydrogen absorption by a powder of yttrium dihydride is investigated. A sample having a known specific surface area and a composition close to the lower concentration boundary of the homogeneity region of dihydride is saturated with hydrogen in a Siverts apparatus at 300–450°C and hydrogen pressures of 5–45 kPa. The diffusivities of hydrogen (D
H) are evalua...... hiện toàn bộ
Investigation of the formation of precipitates of copper cations with sulfhydryl collectors
Allerton Press - - 2009
Influence of the precrystallization flow of copper and aluminum melts on the mechanical properties of ingots
Allerton Press - Tập 51 - Trang 131-133 - 2010
The influence of the precrystallization flow of copper and aluminum melts on the hardness and abradability of ingots is investigated. The flow was organized via passing the melts through the round-section tubes. The hardness of metals was determined by the Brinell method, and abradability was evaluated on a setup for investigating the friction properties of materials. The stability of the chemical...... hiện toàn bộ
Simulation of the Final Stage of the Direct Extrusion Method of Large-Size Rods at Small Elongations
Allerton Press - Tập 59 - Trang 632-636 - 2019
A simulation of the direct extrusion method of large-size rods with diameters of 188, 214, 252, 283, 326, and 560 mm made of alloy 7075; coefficients of friction of 0 and 0.5; and die cone angles of 80° and 90° from a container with a diameter of 800 mm using a 200-MN press with the help of the DEFORM-2D software package is performed. The distribution of radial velocities of metal flow on a workin...... hiện toàn bộ
Microstructural and Mechanical Properties of A356/Ni Alloys Produced by the Mechanochemical Method
Allerton Press - Tập 63 Số 2 - Trang 201-211 - 2022
Current Status of Copper-Ore Processing: A Review
Allerton Press - Tập 62 - Trang 375-381 - 2021
An analysis of flowsheets for processing sulfide and oxide copper ores, reagent modes, processing equipment, and flotation indicators in some domestic and foreign processing plants and productions is carried out. Autogenous and semiautogenous mills are commonly used in the primary grinding stage in ore processing plants, which excludes medium and fine crushing. The alternative is high-pressure gri...... hiện toàn bộ
Obtaining manganese dioxide under conditions of diaphragm-free electrolysis
Allerton Press - Tập 50 - Trang 13-16 - 2009
The conditions of obtaining manganese dioxide using diaphragm-free electrolysis are investigated. The optimum mode of obtaining the product is established, depending on the current density, process duration, and acidity.
Development of Composite Bronzes Reinforced by Steel Dendrites
Allerton Press - Tập 59 - Trang 527-532 - 2018
A group of composite bronzes BrZhNKA 9-4-1-1, BrZhNA 12-7-1, etc., has been studied. Brittle intermetallic compounds of the Cu3Sn type are replaced by steel dendrites in them.. The mass transfer of Fe, Ni, Co, and Al between the matrix and dendrites in these bronzes is studied. The dispersity of dendrites depending on the production method of the mentioned alloys can be increased tenfold, for exam...... hiện toàn bộ
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