scholarly journals On possibility of using silicomanganese slag and ladle electric steelmaking slag in manufacture of welding fluxes

2021 ◽  
Vol 64 (10) ◽  
pp. 706-711
Author(s):  
N. A. Kozyrev ◽  
A. R. Mikhno ◽  
A. A. Usol'tsev ◽  
R. E. Kryukov ◽  
A. S. Simachev
Keyword(s):  
Electric Steelmaking ◽  
Liquid Sodium ◽  
Steelmaking Slag ◽  
Welding Fluxes ◽  
Metallic Inclusions ◽  
Initial Charge ◽  
Sodium Glass ◽  
Metallurgical Combine ◽  
Welding Processes ◽  
Slag Waste

Analysis of the existing trends in development of technologies for production of welding and surfacing fluxes showed that one of the actively developing areas is the production of fluxes using man-made waste (including metallurgical one) as components of the initial charge. This is due to the fact that the slag waste of metallurgical production contains a large amount of manganese and silicon, which in turn are the basis in welding fluxes. Within the framework of this direction development, the article describes principal possibility and efficiency of using materials based on ladle electric steelmaking slag from JSC “EVRAZ United West Siberian Metallurgical Combine” and slag produced by silicomanganese from LLC “West Siberian Electrometallurgical Plant” in the charge for production of fluxes used in the surfacing of rolling rolls. All the laboratory tests were made using the equipment of the scientific and production center “Welding Processes and Technologies”. For surfacing steel samples, the authors used a flux additive obtained by mixing ladle electric steelmaking slag of a fraction less than 0.2 mm with liquid sodium glass in a ratio of 62 and 38 %. The resulting flux additive was mixed with slag from the production of silicomanganese of a fraction of 0.45 - 2.50 mm in various ratios. Studies of the chemical composition (by the spectral method) and metallographic studies of the deposited layer revealed a tendency to an increase in sulfur content and in contamination with non-metallic inclusions in it with an increase in content of the flux additive in the charge of more than 20 %. According to the results of visual quality control of the deposited layer macrostructure, the absence of defects was established with a flux additive content of up to 30 %.

Innovational Construction Materials of LLP “EcostroyNII-PV” Production

2021 ◽  
Vol 410 ◽  
pp. 806-811
Author(s):  
Kapar Sh. Aryngazin ◽  
Alexey V. Bogomolov ◽  
Askar K. Tleulessov
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Construction Materials ◽  
Electric Power Industry ◽  
Steelmaking Slag ◽  
Alumina Production ◽  
Building Products ◽  
Operational Characteristics ◽  
Ash And Slag Waste ◽  
Slag Waste

The article discusses the experience of recycling industrial waste from the electric power industry and metallurgy. Based on the experience of Ecostroy NII-PV LLP. The proposed technology for manufacturing building products from ash and slag waste provides innovative compositions of raw mixtures. What provides an increase in operational characteristics and labor productivity in construction. The applied technology, in comparison with the existing analogues, provides for the use of local waste (ash and slag waste from the combustion of Ekibastuz coal, bauxite sludge from the Pavlodar aluminum plant, steel-making slags), differing in chemical and granulometric composition. as well as binding properties from other analogs and prototypes. In the manufacture of building products introduced mixture, including, wt %: slag Portland cement - 14.32-17.00; sand - 18.74-25.52, crushed stone - 46.50-49.71, sludge from alumina production obtained during the recycling of bauxite from Kazakhstan - 5-7; self-disintegrating steelmaking slag - 5-7; ash and slag waste from thermal power plants from burning Ekibastuz coals - 5-7. According to the test results, the average tensile strength of building products (paving slabs, curbs, hollow bricks) is 3.2 - 3.8 MPa (strength class V2.5).

Effect of Hardening Accelerators and other Chemical Admixtures on the Properties of a Quick-Setting Mixture

2018 ◽  
Vol 276 ◽  
pp. 116-121 ◽  
Author(s):  
Alsu Khamatova ◽  
Grigory Ivanovich Yakovlev ◽  
Vadim Khozin ◽  
Grigory Nikolaevich Pervushin
Keyword(s):  
Mechanical Properties ◽  
Setting Time ◽  
Physicomechanical Properties ◽  
Electric Steelmaking ◽  
Steelmaking Slag ◽  
Strength Gain ◽  
Short Term ◽  
Fine Grained ◽  
Chemical Admixtures ◽  
Gypsum Content

The physicochemical and physicomechanical properties of quick-setting compositions based on fine-grained electric steelmaking slag (ESS) produced by Izhstal PJSC, Russia, have been examined. The study also focuses on the processes of interaction of the components of the compositions based on ESS in combination with hardening accelerators (Li2CO3, K2SO4) and plasticizing additives (SP-1, Melflux 2651F). It has been found that mechanoactivation of the composition improves the hydration in comparison with chemical admixtures. This can be proved by the obtained results of the setting and testing timing of the mechanical properties of the mixture. Plasticizers being added, the setting time increases at the average by 2.3 times, and accelerators being added, by 2 times compared with the mechanically activated composition. The influence of mechanoactivation on the strength of the compositions has been described. In comparison with the plasticized composition, the strength increases by 10%, while using accelerators – by 30%. Thus, the most effective way of producing a dry mixture with the properties of quick setting and hardening is a short-term mixed grinding of all its components, which makes it possible to exclude accelerating chemical admixtures and plasticizing additives in the mixture. Also, grinding positively affects the strength gain of quick-setting compositions while reducing the gypsum content to 5%.

New Carbon-Fluorine Containing Additive for the Welding Fluxes

2014 ◽  
Vol 682 ◽  
pp. 495-498 ◽  
Author(s):  
N.A. Kozyrev ◽  
R.E. Kryukov ◽  
Dmitry E. Kolmogorov
Keyword(s):  
Mechanical Properties ◽  
Low Temperatures ◽  
Gas Content ◽  
Welding Fluxes ◽  
Metallic Inclusions

Carbon-fluorine containing additive for AN-348A, AN-60 and AN-67 fluxes was developed. Application of the additive reduces the gas content of the weld as well as its contamination with oxide non-metallic inclusions and improves the complex of required mechanical properties and toughness (especially at low temperatures).

scholarly journals Application of ladle electric steelmaking slag as a flux – additive for welding

2020 ◽  
Vol 866 ◽  
pp. 012020
Author(s):  
A R Mikhno ◽  
N A Kozyrev ◽  
R E Kryukov ◽  
A A Usoltsev ◽  
A A Umansky
Keyword(s):  
Electric Steelmaking ◽  
Steelmaking Slag

scholarly journals Nature Conservation Technology for Producing Slag-Foam Glass as a Structural and Thermal Insulating Material

2018 ◽  
Vol 41 ◽  
pp. 02017 ◽  
Author(s):  
Natalia Gilyazidinova ◽  
Nadezhda Rudkovskaya ◽  
Tatiana Santalova
Keyword(s):  
Foam Glass ◽  
Glass Production ◽  
Average Density ◽  
Liquid Sodium ◽  
Insulation Material ◽  
Thermal Insulating ◽  
Soluble Glass ◽  
Ferroalloy Plant ◽  
Conservation Technology ◽  
Sodium Glass

The purpose of the research is to determine the starting material composition, the conditions for its heat treatment and operation, and also the development of the recommendations on the technology of manufacturing and use of slag-foam glass as a structural and thermal insulation material for low-rise construction. Research and development of the composition and technology of ferrosilicate dust - a secondary product of the Novokuznetsk ferroalloy plant and Kemerovo chemical enterprises - slag-foam glass production, were carried out taking intoaccount the need for recycling of waste generated during the production process. The liquid sodium glass production waste is a mixture offerrosilicate dust that is not completely exhausted in the reactors and anaqueous Na2OSiO2 solution. Its density varies from 1.2 g/cm3 to 1.5 g/cm3, and the binding properties are extremely unstable, they depend on the soluble glass and water ratio in the waste. The use of this material as the basis for the production of structural and thermal insulating slag-foamglass with the stable strength index, the average density and the long-term durability is quite relevant.

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