Digestion behaviors of sulfur-containing minerals and desulfuration during alumina production process

2021 ◽  
Vol 173 ◽  
pp. 107234
Author(s):  
Zhanwei Liu ◽  
Hengwei Yan ◽  
Wenhui Ma ◽  
Baoqiang Xu ◽  
Ping Xiong
Keyword(s):  
Production Process ◽  
Alumina Production ◽  
Sulfur Containing

scholarly journals Simulating the Use of a Smelter Off-Gas in the Precipitation Stage of the Pedersen Process

2021 ◽  
Vol 5 (1) ◽  
pp. 53
Author(s):  
Andriani Manataki ◽  
James M. Mwase ◽  
Casper van der Eijk
Keyword(s):  
Production Process ◽  
Experimental Work ◽  
Co2 Concentration ◽  
Hydrometallurgical Process ◽  
Alumina Production ◽  
High Co2 ◽  
Aluminum Hydroxides ◽  
High Co2 Concentration

The Pedersen process is an alumina production process, which combines pyrometallurgical and hydrometallurgical methods. In the pyrometallurgical stage, limestone is calcined and CO2 is generated. This off-gas can be captured with a high CO2 concentration. At the end of the hydrometallurgical process, aluminum hydroxides, like bayerite, are precipitated using CO2. In this paper, experimental work on precipitation of aluminum hydroxides through the addition of a mixture of CO2, O2 and N2 is presented. The parameters varied, as were the percentages of each gas and the temperature. The indicators measured were the time until the beginning of precipitation and the time that the precipitation lasts. These tests simulate the use of a smelter furnace off-gas in the precipitation stage of the Pedersen process and have shown promising results.

Comparison of deep desulfurization methods in alumina production process

2015 ◽  
Vol 22 (10) ◽  
pp. 3745-3750 ◽  
Author(s):  
Zhan-wei Liu ◽  
Wang-xing Li ◽  
Wen-hui Ma ◽  
Zhong-lin Yin ◽  
Guo-bao Wu
Keyword(s):  
Production Process ◽  
Alumina Production ◽  
Deep Desulfurization

scholarly journals USE OF DUMPED RED MUD OF ALUMINA INDUSTRY AT GRANULATION OF THE MOLTEN SULFUR-CONTAINING BLAST FURNACE SLAG

2019 ◽  
Vol 16 (31) ◽  
pp. 837-845
Author(s):  
Andrey B LEBEDEV ◽  
Vladimir A UTKOV ◽  
Olga A KAYGORODOVA ◽  
Marsel A KADYROV
Keyword(s):  
Blast Furnace ◽  
Red Mud ◽  
Power Plants ◽  
Natural Waters ◽  
Thermal Power ◽  
Alumina Production ◽  
Industrial Gases ◽  
Red Muds ◽  
Alumina Industry ◽  
Sulfur Containing

There is a problem of using waste of alumina production from bauxite red mud. Warehousing of it is fraught with ecological catastrophes. Red muds constantly worsen the environment due to dusting and pollution of natural waters. Red mud is a product of bauxite processing. One ton of alumina accounts for 1 to 2.5 tons of red mud. Currently, it is not being processed, despite the availability of 3,000 publications and patents on this topic. One of them is justified by the ambiguity in the economic effectiveness of its use by consumers. In this paper, the options for economic and environmental efficiency of RM use are presented as substitutes for expensive lime and limestone used for purification of industrial gases emitted to the atmosphere in large quantities with toxic sulfur compounds. Laboratory and industrial tests revealed the sorption properties of red muds. When cleaning gases from sulfur emitted into the atmosphere by furnace gases, thermal power plants, sinter machines, and steelmaking furnaces. In addition, the ecological and technological efficiency of purification of sulfur-containing gases released in the areas of granulation of molten blast-furnace slags is shown.

Reaction Behavior and Conversion of Anatase in Alumina Production Process with Calcification-Carbonization Method

2016 ◽  
pp. 85-90
Author(s):  
Wang Yanxiu ◽  
Zhang Ting'an ◽  
Lv Guozhi ◽  
Zhu Xiaofeng ◽  
Zhang Weiguang
Keyword(s):  
Production Process ◽  
Alumina Production ◽  
Reaction Behavior

Reaction behavior and conversion of anatase in alumina production process with calcification-carbonization method

2016 ◽  
pp. 85-90
Author(s):  
Wang Yanxiu ◽  
Zhang Ting’an ◽  
Lv Guozhi ◽  
Zhu Xiaofeng Zhang Weiguang
Keyword(s):  
Production Process ◽  
Alumina Production ◽  
Reaction Behavior

Use of Alumina Production Waste Red Mud During Molten Sulfur-Containing Slag Granulation

Metallurgist ◽  
2019 ◽  
Vol 63 (7-8) ◽  
pp. 727-732
Author(s):  
A. B. Lebedev ◽  
V. A. Utkov ◽  
V. Yu. Bazhin
Keyword(s):  
Red Mud ◽  
Production Waste ◽  
Alumina Production ◽  
Molten Sulfur ◽  
Sulfur Containing ◽  
Slag Granulation

Methionine-Specific Staining of Collagen

1982 ◽  
Vol 40 ◽  
pp. 294-295
Author(s):  
E.M. Kuhn ◽  
K.D. Marenus ◽  
M. Beer
Keyword(s):  
Amino Acids ◽  
Collagen Fibers ◽  
Type Iii Collagen ◽  
Type I ◽  
Electron Microscopic ◽  
Good Correspondence ◽  
Specific Staining ◽  
Type Iii ◽  
Different Types ◽  
Sulfur Containing

Fibers composed of different types of collagen cannot be differentiated by conventional electron microscopic stains. We are developing staining procedures aimed at identifying collagen fibers of different types.Pt(Gly-L-Met)Cl binds specifically to sulfur-containing amino acids. Different collagens have methionine (met) residues at somewhat different positions. A good correspondence has been reported between known met positions and Pt(GLM) bands in rat Type I SLS (collagen aggregates in which molecules lie adjacent to each other in exact register). We have confirmed this relationship in Type III collagen SLS (Fig. 1).

Signal-regulated oxidation of proteins via MICAL

2020 ◽  
Vol 48 (2) ◽  
pp. 613-620
Author(s):  
Clara Ortegón Salas ◽  
Katharina Schneider ◽  
Christopher Horst Lillig ◽  
Manuela Gellert
Keyword(s):  
Signal Transduction ◽  
Hydrogen Peroxide ◽  
Cell Death ◽  
Redox Regulation ◽  
Signal Transduction Pathways ◽  
Cellular Functions ◽  
Intracellular Signals ◽  
Amino Acid Side Chains ◽  
Specific Receptors ◽  
Sulfur Containing

Processing of and responding to various signals is an essential cellular function that influences survival, homeostasis, development, and cell death. Extra- or intracellular signals are perceived via specific receptors and transduced in a particular signalling pathway that results in a precise response. Reversible post-translational redox modifications of cysteinyl and methionyl residues have been characterised in countless signal transduction pathways. Due to the low reactivity of most sulfur-containing amino acid side chains with hydrogen peroxide, for instance, and also to ensure specificity, redox signalling requires catalysis, just like phosphorylation signalling requires kinases and phosphatases. While reducing enzymes of both cysteinyl- and methionyl-derivates have been characterised in great detail before, the discovery and characterisation of MICAL proteins evinced the first examples of specific oxidases in signal transduction. This article provides an overview of the functions of MICAL proteins in the redox regulation of cellular functions.

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