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A. Yurin. UDC 622.788.36 Compressive strength (OST 14-3-72) is regarded as one of the principal criteria of suitability of roasted iron- ore pellets for metallurgical processing. One of the machines at the Sokolovsko-Sarbaisk combine (SSGOK) was used to study the effect of the roasting temperature routine on the strength ofunfluxed pellets.
This study aims to investigate the effects of the substitution of Portland cement with copper slag at dosages of 10 and 15% by weight on the fresh and compressive strength of concrete. The ...
The yield strength as commonly applied to copper and copper alloys is the stress which will produce an extension of either 0.20 percent or 0.50 percent under load. It is known as the Yield Strength at 0.20 percent extension or 0.50 extension. Slightly higher yield strengths are recorded for the same material using a greater offset. Since it is ...
Fig. 2 a shows the compressive engineering stress–strain curve for a coated 200 nm diameter pillar with a higher magnification inset showing the first 4% of strain. As is evident from the stress–strain curve, the initial loading is nearly elastic, followed by two displacement bursts, commonly understood to correspond to dislocation avalanches [65], …
The principal copper ore mineral is chalcopyrite (CuFeS 2), which is commonly smelted to yield a matte containing ~50% copper.In the presence of silica flux, iron is selectively …
Similarly, Tian et al. (2020) observed that the compressive strength of copper tailings increased between 22 and 80 °C due to the homogeneous dissolution of alumino-silicate, leading to the ...
1. Introduction. Mine tailings are fine-grained remains from ore processing, which contain a certain amount of heavy metals (Rao and Liu, 2015) and are becoming increasingly produced by the mining industry.According to the Annual Report on Comprehensive Utilization of China Resources (ARCUCR-2014), 2.4 billion tons of …
In the formula, Y 3, Y 7 and Y 28 are the compressive strength of the filling body for 3 days, 7 days and 28 days respectively.Among them, X 1 is the horizontal coding of total tailings mass ...
Approximately 13.7 million tons of copper mine tailing as a solid waste is generated annually as a result of mining and ore processing activities in the region. This study investigates the ...
Wang et al. adopted the copper tailings–GBFS system, and the compressive strength was increased by 5.5–19.8% at 28 d. Molybdenum tailings and GBFS were used to prepare a one-part geopolymer, and the compressive strength of the geopolymer reached 44 MPa at 28 d with 80% slag content [ 41 ].
Copper: Ultimate Tensile Strength: 210 MPa: Yield Strength: 33 MPa: Young's Modulus of Elasticity: 120 GPa: Shear Modulus of Elasticity: 48 GPa: Bulk Modulus of Elasticity: 140 GPa: Mohs Scale: 3: Brinell …
The global iron-producing industries are trying to use the high alumina content iron ores due to the exiguity of high-grade ores and economic reasons. For this purpose, this present study focuses on the utilization of high alumina hematite iron ores obtained from eastern part of India in pelletization experiments. The effects of firing …
Fig. 2 shows the compressive strength of copper tailing-based geopolymers as a function of curing temperature. The 3 d compressive strength was similar to the 28 d compressive strength of geopolymers cured at all selected temperature, indicating that geopolymerization is a rapid reaction, as observed in many …
The highest compressive strength of 40.9 MPa was obtained using a formation pressure of 20 MPa, a liquid/solid of 0.15, and a substitution of 20% CaO for NaOH as the alkaline activator.
The laboratory tests revealed that the first ore zone has a slightly higher compressive strength than the other two zones, while the compressive strength of …
The cement was purchased from the Conch Group. The compressive strengths of the cement were measured using the ISO method (Test method of cement mortar strength, GB/T 17671-2021) after 7 and 28 days, resulting in 39.7 MPa and 51.2 MPa, respectively. These values meet the required cement strength specifications.
The dry compressive strength of the nuclear ore was compared with and without gangue. Figure 10 . shows the relationship between the dry compressive strength and granule size for HN+HF and .
DOI: 10.1016/j.jmrt.2020.04.043 Corpus ID: 218935944; Alkali-activated copper tailings-based pastes: compressive strength and microstructural characterization @article{Tian2020AlkaliactivatedCT, title={Alkali-activated copper tailings-based pastes: compressive strength and microstructural characterization}, author={X. Tian and …
The replacement of copper slag by copper mine tailings reduced the compressive strength of the alkali-activated cements (Fig. 7.13), depending on the curing temperature. Specimens cured at 60°C and 90°C, containing 50 wt.% copper slag showed comparable strengths to . Read More Potential utilization of copper tailings in the ... · 1.
This article reports on the experimental work carried out in the laboratory of the Sustainable Mining Research Center CIMS of the Engineering Consulting Company JRI, where the effect of the alkaline activator type on the compressive strength of geopolymers based on copper flotation tailings was analyzed. ... with SS obtained …
Figure 1a and b show the results of compressive, split tensile and flexural strength depending on % Copper Slag in the mixture, where data from Pavez et al., Feng et al., and Hallet et al. describe replacement of OPC by CUS, Alp et al. describe replacement of Fe ore by CUS. In all other studies replacement of sand by CUS was …
Metal strength refers to the ability of a metal or metallic material to withstand an applied force without undergoing deformation or failure. It is a fundamental mechanical property that is essential in determining the suitability of a metal for various applications. Metal strength is a critical consideration in various industries, including ...
determine the uniaxial compressive strength . and the Hoek-Brown constant as described by Hoek and Brown (1980a). In this analysis, equation (5) is re-written in the form: (6) …
Ore Tailing (IOT) and Cement by Ground Granulated Blast Furnace Slag (GGBFS) on the Compressive Strength of Concrete. Ananthayya M. B., Department of Civil Engineering, ... (Copper) 0.003 ...
The mining industry is the foundation for the manufacture of electronic communication equipment, machinery and aerospace materials, etc. ... The compressive strength of the pastes increased with the increase of formation pressure from 5 ... High strength alkali-activated copper taillings-based pastes were synthesized with optimized …
Results of compressive strength and flexural strength of copper mining tailings mortar. 3.3. ... Compressive strength decreases because mortar mix was lacking in C–S–H binding, which in turn is caused by the transformation of hydration products into calcium sulfoaluminate and calcium sulphate. Cement mortar with acid resistance, …
The increasing use of copper and its allied materials across many industries is ramping up copper mining activities in many countries, and proper management and disposal of huge volumes of copper mine tailings arising thereof is a huge challenge. Sungun mine is the biggest open-cast copper mine in the northwest of Iran. …
Tests show that with an increase in substitution rate of cement in the tailings, the compressive strength of concrete tends to decrease, and when the substitution rate is at 10%, 20% and 30% respectively, the compressive strength of concrete is measured up to the design requirement; if an appropriate amount of water reducing admixture is added ...
Arino and Mobasher studied the effect of ground copper slag (GCS) on the strength and fracture of cement-based materials is studied. Up to 15 % by mass of ground copper slag was used as a portland cement replacement. Compressive strength results are shown in Fig. 12. The strength and fracture toughness of concrete samples were …
36 Citations. Explore all metrics. Abstract. The increasing use of copper and its allied materials across many industries is ramping up copper mining activities in …
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