scholarly journals Sustainable utilization of a converter slagging agent prepared by converter precipitator dust and oxide scale

2020 ◽  
Vol 9 (1) ◽  
pp. 664-674
Author(s):  
Bailong Liu ◽  
Zhaohui Zhang ◽  
Longxin Sun ◽  
Zhenghua Yang ◽  
Lu Feng
Keyword(s):  
Compressive Strength ◽  
Chemical Composition ◽  
Moisture Content ◽  
Oxide Scale ◽  
Calcium Oxide ◽  
Raw Materials ◽  
Sustainable Utilization ◽  
Optimum Ratio ◽  
Orthogonal Experiments ◽  
Soluble Glass

AbstractA converter slagging agent was prepared using converter precipitator dust and oxide scale as raw materials and bentonite, calcium oxide, and soluble glass as binders. The influence of different binders on the strength of the converter slagging agent was studied. The optimum ratio of bentonite, calcium oxide, and sodium silicate was determined by orthogonal experiments. The chemical composition, strength, moisture content, alkalinity, and other indicators of the prepared converter slagging agent met the requirements for converter smelting. The drop intensity of the green pellet was 3.7 times, and the compressive strength of the dry pellet could reach 988.72 N/m2. Therefore, the sustainable utilization of converter precipitator dust and oxide scale could be realized by the preparation of a converter slagging agent.

Research on the Influence of Pelleting Mixture Components on Chemical Components and Pellets Structure

2014 ◽  
Vol 216 ◽  
pp. 55-60
Author(s):  
Adela Todoruţ ◽  
Teodor Hepuţ ◽  
Victoria Haranguş
Keyword(s):  
Compressive Strength ◽  
Chemical Composition ◽  
Raw Materials ◽  
Chemical Components ◽  
Hardening Process ◽  
University Of Technology ◽  
Composition And Structure

In this work we followed the chemical composition and structure of pellets produced by two recipes in the laboratory of Energy and Raw Materials Base of the Faculty of Engineering Hunedoara, followed by determining compressive strength of pellets after hardening process and chemical composition. Some of the experiments were performed in a stage carried out at Luleå University of Technology Sweden (SEM and XRD measurements). The experiments have watched also the evolution of hardening temperatures for these pellets, the data was interpreted in the form of charts in Excel.

Study on Light Porous Unsintered Building Material

2012 ◽  
Vol 532-533 ◽  
pp. 144-148
Author(s):  
Cong Cong Jiang ◽  
Gou Zhong Li ◽  
Qi Jin Li
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Red Mud ◽  
Building Material ◽  
Building Materials ◽  
Thermal Conductivity Coefficient ◽  
Raw Materials ◽  
Ambient Conditions ◽  
Optimum Ratio ◽  
Broad Application

A light porous unsintered building material was prepared with red mud, fly ash, silica fume as the main raw materials, mixed with a certain amount of foam and curing agent, by the technology of casting and curing at ambient conditions. The influence of different ratio of red mud to fly ash on compressive strength was studied. The microstructure properties of light porous unsintered building material were characterized by scanning electron microscopy (SEM) and then the strength mechanism was studied. The results showed that the optimum ratio of red mud to fly ash was 2:1, and for the best sample, its bulk density was 891kg•m-3, 7d and 28d compressive strength were 8.4MPa and 14.7MPa, thermal conductivity coefficient was 0.235W•(m•K)-1, which may have a broad application prospect in the building materials field.

Effect of Raw Material Ratios on the Compressive Strength of Chang Jiang Iron Ore Gangues Aerated Concrete Block

2012 ◽  
Vol 573-574 ◽  
pp. 92-98
Author(s):  
Wen Hua Xu ◽  
Hao Zhang ◽  
Wei Jun Ren ◽  
Jin Yi Wu
Keyword(s):  
Compressive Strength ◽  
Aluminum Powder ◽  
Quartz Sand ◽  
Iron Ore ◽  
Raw Materials ◽  
Dry Weight ◽  
Concrete Block ◽  
Raw Material ◽  
Optimum Ratio ◽  
Aerated Concrete

The present study was to investigate the production of aerated concrete block from ChangJiang iron ore gangues. Analyze Quartz Sand, cement, CaO and gangue’s ratio’s influence on the aerated concrete block’s compressive strength, and then determine the optimum ratio. The results shows that gangue, quartz sand, cement, CaO, gypsum, aluminum powder, additive’s optimum ratio is 60.11%，8.26%，15.03%, 14.07%, 2%, 0.06% and 0.07% the dry weight of raw materials. Obtain the strongest compressive strength with the ratio 0.59:1 for water and raw materials. Adding iron gangues into aerated concrete block can turn wastes into treasures, which is originally done by us.

scholarly journals STUDY OF THE KINETICS OF HYDRATION STRUCTURING AND THE PROPERTIES OF LIME-BELITIC BINDERS BASED OF MARL

Vestnik MGSU ◽  
2016 ◽  
pp. 62-68
Author(s):  
Aleksey Dmitrievich Zhukov ◽  
Marat Orynbaevich Asamatdinov ◽  
Bakhtiyar Chimbergenovich Nurymbetov ◽  
Sharibay Nauryzbaevich Turemuratov
Keyword(s):  
Chemical Composition ◽  
Low Temperature ◽  
Physicochemical Properties ◽  
Calcium Oxide ◽  
Raw Materials ◽  
High Strength ◽  
Dicalcium Silicate ◽  
Different Types ◽  
Materials Used ◽  
Kinetics Of

Lime-belite binder is obtained by low-temperature firing of natural marl, marling or sanding limestone and artificial lime-silica mixtures. The binder with calcium oxide also contains significant amounts of dicalcium silicate and some others materials, the composition and quantity of which depend on the chemical composition and firing temperature of the raw materials used. The authors investigated the kinetics of hydration structures and physicochemical properties of lime-based binders on the basis of belitic marl from Akburly and Porlytau. The formation of resistance is associated not only with the formation of the system of different types of structures - coagulation and crystallization, with the transition of the first to the second, but also with the different stages of formation of crystal structures. The possibility of using lime-belitic binders for the preparation of high-strength products of autoclave hardening is proved. The autoclaved binders used in the manufacture of sand-lime products are prepared with the use of mixtures consisting of 60...70 % lime-belite binder and 30...40 % ground quartz sand.

scholarly journals Determination of Optimal Roasting Conditions for the Production of Gabou

2019 ◽  
Vol 8 (5) ◽  
pp. 48
Author(s):  
Maman M. Rabiou ◽  
Chaibou Yaou ◽  
Mamadou Lewamy ◽  
Idrissa Moussa ◽  
Haoua Sabo ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Moisture Content ◽  
Palm Oil ◽  
Raw Materials ◽  
Negative Influence ◽  
Sensory Characteristics ◽  
Green Leaves ◽  
Sensory Analyses ◽  
Proximate And Mineral Composition

Gabou is a traditional onion-based spice commonly used in Niger. It is prepared in a handcrafted way by roasting of dried onion. This study was conducted to determine the optimal roasting conditions. The traditional processes of Gabou manufacturing were identified through a survey and studied. Gabou were produced at different roasting temperatures and times in presence of the oil quantities in the laboratory. Then sensory analyses were conducted to select the Gabou of best sensory characteristics. The chemical composition of the selected Gabou and their raw materials was determined. The result of the investigation showed that flower stems, green leaves and onion bulbs were used in the production of Gabou. The optimal roasting conditions were obtained at 120°C for 8 min for bulbs Gabou, 120°C for 5 min for green leaves Gabou and 130°C for 11 min for flower stems Gabou in the presence of 1 ml, 2 ml and 0 ml palm oil per 30 g, respectively. Roasting conditions that led to the production of Gabou of good sensory characteristics did not have a significant negative influence (p<0.05) on proximate and mineral composition. On the contrary, they have significantly reduced the moisture content which contributes to the reduction of Gabou shelf life.

scholarly journals NONSTANDARD RAW MATERIALS FOR ANORTHITE CERAMICS PRODUCTION

2020 ◽  
Vol 22 (5) ◽  
pp. 122-128
Author(s):  
V. A. Vlasov ◽  
M. A. Semenovykh ◽  
N. K. Skripnikova ◽  
V. V. Shekhovtsov
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Chemical Composition ◽  
Water Absorption ◽  
Frost Resistance ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
X Ray ◽  
Regulatory Documents ◽  
Ceramic Mixture

The paper analyzes the Russian and foreign research into the use of nonstandard raw materials in the production of constructional anorthite ceramics. The raw materials with different chemical composition are investigated. It is shown that the use of nonstandard raw materials in the ceramic mixture makes it possible to obtain constructional products with 43.1 MPa compressive strength, 2150 kg/m3 density, about 7 % water absorption and frost resistance that meets the requirements of regulatory documents. The physical and mechanical properties are obtained due to the anorthite phase containing in the composition of end ceramic products, which is confirmed by the X-ray phase and microscopic analyses.

scholarly journals Kajian Eksperimental Pengaruh Penggantian Sebagian Semen Dengan Limbah Las Karbit Pada Mortar

2019 ◽  
Vol 24 (1) ◽  
pp. 33
Author(s):  
Dita Aninda ◽  
Putri Achir Wulansari ◽  
Muhammad Fajar A ◽  
Dianita Ratna Kusumastuti ◽  
Triwardaya Triwardaya
Keyword(s):  
Compressive Strength ◽  
Natural Resources ◽  
Calcium Oxide ◽  
Building Materials ◽  
Raw Materials ◽  
Control Variable ◽  
Residential Facilities ◽  
Partial Replacement ◽  
Main Constituent ◽  
Minimum Requirements

<em><span>The Development of residential facilities will affect the increase in needs of building materials.. Cement is one of the building materials whose raw materials come from nature. Availability of natural resources will affect the production of cement. Carbide welding waste is the remainder of the carbide reaction to water which produces acyetilene gas where 60% of the waste contains Calcium Oxide (CaO) which is the main constituent of cement. This study aims to analyze the effect of partial replacement of cement with carbide weld waste on mortar compressive strength. The study was conducted by making a mortar cube with dimensions of 5 cm x 5 cm x 5 cm with mixed proportions of 1PC: 3PS. Variation of partial replacement of cement with carbide welding waste used as much as 0%, 5%, 10%, 15%, and 20%. The results showed that the mortar compressive strength without carbide welding waste was used as the control variable, amounting to 329.33 kg/cm2. Mortar compressive strength with the proportion of partial replacement of cement with carbide welding waste 5%, 10%, 15%, and 20% respectively are 286.38 kg/cm2, 243.42 kg/cm2, 200.47 kg/cm2, and 157.51 kg/cm2. based on pengijuan results indicate that the mortar is included in type M at a proportion of a maximum of 15% with a compressive strength of 200.47 kg/cm2 according to the minimum requirements of 175 kg/cm<sup>2</sup>.</span></em>

Study on the Performance of New Foamed Cement Insulation Material

2013 ◽  
Vol 648 ◽  
pp. 112-115 ◽  
Author(s):  
Xiao Long Li ◽  
Guo Zhong Li
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Material Properties ◽  
Raw Materials ◽  
Insulation Material ◽  
Single Factor ◽  
Optimum Ratio ◽  
Foaming Agent ◽  
Cement Ratio ◽  
Foam Stabilizer

In this experiment, cement, fly ash, quicklime, foaming agent and foam stabilizer were used as raw materials to prepare the new foamed cement insulation material. Single-factor tests were designed to study the influence of different dosages of foaming agent, foam stabilizer and quicklime on the material properties. The optimum ratio was determined: content of fly ash was 25%, water-cement ratio was 0.37, content of foaming agent was 4.5%, content of foam stabilizer was 1.2% and content of quicklime was 1.5%. The material is tested: 3d compressive strength of the material is 1.049MPa, 3d flexural strength of the material is 0.608MPa.

Influence of Bottom Ashes from Biomass on Compressive Strength of Concretes

2019 ◽  
Vol 972 ◽  
pp. 3-9
Author(s):  
Malgorzata Ulewicz ◽  
Jakub Jura
Keyword(s):  
Electron Microscopy ◽  
Compressive Strength ◽  
Chemical Composition ◽  
Industrial Waste ◽  
Raw Materials ◽  
Bottom Ash ◽  
Waste Materials ◽  
X Ray ◽  
Natural Aggregates ◽  
Fluorescence Spectrometer

The preliminary results of utilization of bottom ash from combustion of biomass for the produce of concrete has been presented. Currently, this waste are deposited in industrial waste landfills. The chemical composition of waste materials was determined using X-ray fluorescence (spectrometer ARL Advant 'XP). Concrete were made using CEM I 42.5 R (Cemex) and sand - gravel mix aggregate. The obtained concrete were subjected to microscopic examination (LEO Electron Microscopy Ltd.) and their compressive strength (PN-EN-196-1) and absorbability (PN-85/B-04500) were identified. The obtained results showed, the replacement of the natural aggregates by bottom ash from combustion of biomass reduce consumption of raw materials and will have a good influence on the environment.

scholarly journals PEMBUATAN BIOBRIKET ARANG BERBASIS TANDAN KOSONG KELAPA SAWIT DAN AMPAS TEBU SEBAGAI SUMBER ENERGI ALTERNATIF YANG RAMAH LINGKUNGAN

2020 ◽  
Vol 2 (1) ◽  
pp. 1-6
Author(s):  
Giyanto Giyanto
Keyword(s):  
Compressive Strength ◽  
Moisture Content ◽  
Combustion Rate ◽  
Alternative Energy ◽  
Raw Materials ◽  
Calorific Value ◽  
Ash Content ◽  
Quality Analysis ◽  
Best Parameters ◽  
Research Show

Briquettes are solid fuels that can be used as alternative energy. This research aims to determine the optimal ratio of raw materials with adhesive content at about 10% constantly. The stages of this research were as follows: 1) Sampling of raw materials, 2) Drying and decomposition of raw materials, 3) Carbonization Process, 4) Milling. 5) Composition Treatment, 6) Pressing and quality analysis of briquettes. The data of this research were obtained by measuring calorific value, moisture content, ash content, density, compressive strength and combustion rate. The ratio between empty bunch : bagasse respectively was depended on 100%: 0%, 75%: 25%, 50%: 50%, 25%: 75%, 0%: 100%. The Parameters of treatments were calorific value, moisture content, ash content, density, compressive strength, and combusition rate to find out the best parameters. The result of this research show that the combination of empty bunch and baggase gave the effect to the qualities. The highest calorific value was showed in the ratio empty bunch : baggase (100% : 0%) with average HHV value; the lowest average of moisture content ; the lowest ash content; density; compressive strength value; and combustion rate respectively 5889 cal/gr; 2,81%; 20%; 0,941 gr/ml; 1,82N/cm2; 0,00223gr/second.

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