scholarly journals INFLUENCE OF AN ORGANIC ADDITIVE ON THE STRUCTURE OF AN AQUEOUS SODIUM SILICATE FILM ON THE SURFACE OF A REFRACTORY CHROMITE FILLER

2021 ◽  
pp. 83-87
Author(s):  
N. A. Kidalov ◽  
N. V. Grigorieva
Keyword(s):  
Sodium Silicate ◽  
Liquid Glass ◽  
Organic Additive ◽  
Convective System ◽  
Organic Additives ◽  
Hot Metal ◽  
Aqueous Sodium ◽  
Silicate Film ◽  
Refractory Filler ◽  
Calcium Bentonite

Formation of the structure of a film of hydrous sodium silicate on the surface of a refractory chromite filler. Wastes of contact cleaning of oils were used as organic additives, which are calcium bentonite impregnated with oils. The structure of liquid glass films on the surface of a refractory filler, cured at a temperature of 180-400-600-900 ° C, is investigated, which is comparable to the temperature convective system of liquid glass molds and rods, as well as the temperature system of molds after pouring with hot metal.

scholarly journals Study of the properties of a aqueous sodium silicate film on the surface of a refractory filler

2020 ◽  
Vol 747 ◽  
pp. 012004
Author(s):  
N A Kidalov ◽  
N V Grigoreva ◽  
N I Gabelchenko ◽  
A A Belov ◽  
A I Savchenko
Keyword(s):  
Sodium Silicate ◽  
Aqueous Sodium ◽  
Silicate Film ◽  
Refractory Filler

scholarly journals Evaluation of compost quality from municipal solid waste integrated with organic additive in Mizan–Aman town, Southwest Ethiopia

BMC Chemistry ◽  
2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Masresha Mamo ◽  
Henok Kassa ◽  
Lalit Ingale ◽  
Stefaan Dondeyne
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Organic Additive ◽  
Chemical Characteristics ◽  
Lettuce Seed ◽  
Organic Additives ◽  
Lettuce Plant ◽  
Compost Quality ◽  
Physico Chemical ◽  
Phytotoxicity Test

Abstract Background The present study evaluated the compost quality from municipal solid waste (MSW) and organic additives of coffee by-products and leaf of Millettia ferruginea. Compost sample (n = 30) was taken from fresh compost materials and MSW and different organic additive treatments (T1, T2, T3, T4, and T5). Compost treatments phytotoxicity test was conducted using lettuce seed (Lactuca Sativa L. var. crispa). Analysis of variance (ANOVA) was performed using SPSS (version 22) on major compost quality characteristics. Results The compost Physico-chemical characteristics like temperature (26.4 °C), moisture content (45.5%), electrical conductivity (4.6 mS/cm), pH (7.9), total nitrogen (1.2%) and phosphorous content (2918 ppm) in T4 and T5 were analogous but both are significantly different from T3, T2 and T1 compost treatments. Phytotoxicity test using 100% compost treatment media showed that T4 (101%) and T5 (102%) are phytonutrient for lettuce plant. While, T3 and T2; and T1 compost treatments are non-phytotoxic and moderately phytotoxic respectively to lettuce plant. Conclusion Therefore, compost from MSW + M. ferruginea (T4) and MSW + coffee pulp + M. ferruginea (T5) are important for improving the physico-chemical characteristics of compost and are phytonutrient for lettuce plant. Thus, for effectively management of the 75% of organic fraction of waste generated from households in the study area, recycling methods like composting with organic additives must be used at large.

scholarly journals THE EFFECT OF SODIUM SILICATE AND ITS SOLUTION ON THE PROPERTIES OF REFRACTORY COMPLEX BINDER/NATRIO SILIKATO KIEKIO IR JO TIRPALO TANKIO ĮTAKA KOMPLEKSINIO KAITRAI ATSPARAUS RIŠIKLIO SAVYBĖMS

1999 ◽  
Vol 5 (3) ◽  
pp. 211-216
Author(s):  
Valentin Antonovič ◽  
Stasys Goberis ◽  
Romualdas Mačiulaitis
Keyword(s):  
Sodium Silicate ◽  
Liquid Glass ◽  
Solid Phase ◽  
Physical And Mechanical Properties ◽  
Alumina Cement ◽  
Hardening Mechanism ◽  
Temperature Range ◽  
Calcium Hydrosilicates ◽  
Higher Temperature ◽  
Complex Binder

In order to improve thermal and mechanical characteristics of a traditional binder with liquid glass a complex binder consisting of liquid glass, its hardener and alumina cement (“Gorkal 70” containing not less than 70 per cent of AI2O3) was tested. Sodium silicate and its solution effect on physical and mechanical properties of a new refractory complex binder (Table 1, Fig 2) were investigated. The results obtained show that compressive strength of binding compound with high quantity of sodium silicate (N3) is the lowest after it had been cured, dried and fired at 300–600°C (Fig 3). It was also found that the strength of a complex binder with small quantity of sodium silicate (N1) in the temperature range of 20–600°C is 2–3 times as high as that of a traditional binder with dispersed fire-clay. The study in the formation of the structure of a complex binders dilatometric tests have also been made. After initial heating at 80–500°C the compositions contracted (Fig 4) due to dehidratation. At the temperature range of 580–750°C the contraction of compositions continue due to reactions at the solid phase. The hypothesis of the hardening mechanism in the complex binder was proposed. Liquid glass tends to restrain the hydration of the alumina cement though hardeners and sodium silicate interaction result in the intense formation of sodium calcium hydrosilicates. Therefore, a complex binder contains less sodium silicate than a traditional one while being used at higher temperature.

scholarly journals TECHNOLOGY FOR PRODUCING COMPOSITE GLASS-CRYSTAL FACING MATERIALS BASED ON MIXED CULLET

2020 ◽  
pp. 106-114
Author(s):  
N. Bondarenko ◽  
O. Puchka ◽  
V. Bessmertnyy ◽  
S. Chuev ◽  
I. Izotova ◽  
...  
Keyword(s):  
Sodium Silicate ◽  
Silicate Glass ◽  
Liquid Glass ◽  
Fluorescence Analysis ◽  
Liquid Sodium ◽  
Sodium Silicate Glass ◽  
Furnace Sintering ◽  
Composite Glass ◽  
Glass Crystal ◽  
Diamond Saw

An effective energy-saving technology for producing composite glass-crystal facing materials based on fractionated cullet of sheet and container glasses, cullet of porcelain and sodium liquid glass has been developed. The use of fine porcelain powder in the composition of composite glass-crystal facing materials in an amount of up to 10 wt is justified. % and liquid sodium glass up to 5 wt. %. It is shown that the optimal fractional composition of granulated mixed cullet is 35 wt. % fraction 0.63-0.80 mm; 35 wt. % - fractions of 0.80-1.25 mm and 30 wt. % fraction of 1.25-3.15 mm. Polytherms of viscosity of colorless, green and brown container glasses, as well as sheet glass, are calculated. The possibility of using mixed cullet for obtaining composite glass-crystal facing materials is on the basis of obtained dependencies. The chemical composition of sheet and container glasses and porcelain is studied using x-ray fluorescence analysis. Optimal charge compositions have been developed to obtain glass-crystal materials with compressive strength up to 79 MPa. The technology of obtaining composite glass-ceramic facing material includes the following technological operations: milling of glass breakage; grinding cullet of porcelain; drying of sodium liquid glass; the screening of crushed cullet on fractions; the grind of crushed cullet of China; grinding the dried sodium silicate glass; weighing the components in accordance with the developed formulations, the averaging of the graded cullet with fine porcelain; averaging the mixture of finely ground dried sodium silicate glass; stacking the mixture in a metal mold; compaction of the mixture in metal molds; heat treatment in a muffle furnace (sintering); extraction of facing tiles from molds; trimming the edges of the tiles with a diamond saw; quality control of finished products.

scholarly journals The inorganic bond preparation for the coldhardening mixtures

2018 ◽  
pp. 41-45
Author(s):  
Aung Khtut Tkhu ◽  
A. I. Zakharov
Keyword(s):  
Sodium Silicate ◽  
Liquid Glass ◽  
Silicon Oxide ◽  
Sodium Silicate Solution ◽  
Silicate Solution ◽  
Rice Production ◽  
Cold Hardening ◽  
Rice Hulls ◽  
Production Wastes ◽  
Mould Casting

The sodium silicate solution (liquid glass) was prepared to be used as the inorganic bond for the cold-hardening refractory mixtures for the metal mould casting. The source of the silicon oxide was the rice production wastes namely the rice hulls. Several methods were regarded for the liquid glass synthesis and the characteristics of the obtained liquid glasses are presented.

scholarly journals Influence of organic additives on electret state of high pressure polyethylene

2020 ◽  
Vol 5 (2) ◽  
pp. 001-004
Author(s):  
Eldar Mekhraly Gojayev ◽  
Sevinc Sarkar Osmanova ◽  
Shujayat Aman Zeynalov ◽  
Farhad Shamil Karimov
Keyword(s):  
High Pressure ◽  
Surface Charge ◽  
Organic Additive ◽  
Charge Carriers ◽  
Organic Additives ◽  
Negative Corona ◽  
Mechanical Mixing ◽  
Duration Of Storage ◽  
High Pressure Polyethylene ◽  
Industrial Unit

The paper presents the results of a study of the electret properties of high-pressure polyethylene (hppe) modified with organic additives as phthalic-anhydride (pha) and orthophenylenediamine (ophd). Samples obtained and processed by extrusion on an industrial unit brand LRP-700m. Additives were introduced into HPPE by mechanical mixing. For polarization, the samples were placed on a grounded electrode and charged with a negative corona at a voltage of 7 kv. After polarization, the total surface charge of the samples was determined by the compensation method. The thermally stimulated current was recorded in the temperature range 290–520 K, provided that the heating increased linearly at a rate of 3.5 k / min. It is shown that after polarization of hppe composites modified with pha and ophd organic fillers, the depolarization process begins in connection with the resolution and release of trapped charge carriers from traps. After the complete destruction of the homo charges, the density of the surface charge of the hppe films and their optimal modification, reaching a certain value, in the future, depending on the duration of storage, does not change. It was also revealed that the introduction of the organic additive pha and ophd into hppe makes it possible to obtain an antistatic polymer material with improved technological and electrical properties.

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