MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Backfill calcium carbonate coefficient
Feasibility analysis of EICP technique for reinforcing backfill layer
In contrast, enzymeinduced carbonate precipitation (EICP) is an environmentally friendly and sustainable technique which has superior mobility and diffusivity compared to cement To investigate the reinforcement effects of EICP technique on backfill layer, a series of bio 2024年11月1日 The results reveal that introducing 99% pure CO 2 at a flow rate of 1 L/min for 10 min into the filling slurry in a nonsealed container effectively optimizes the microscopic Experimental study on the macroscopic and microscopic 2020年12月30日 Microbial Mixed Backfill (MMB) is presented The influence of various factors on the mechanical properties of MMB is studied Different crystal morphologies of CaCO3 Experimental study on the mechanical properties of microbial 2023年8月1日 The newly generated calcium carbonate crystal makes a limited contribution to the increase in thermal conductivity In the case of EICPtreated granite residual soil, CaCO 3 Thermal conductivity enhancement of backfill material and soil
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Study on the mechanism and optimal proportioning test of pea
Enzymeinduced calcium carbonate precipitation technology (EICP) has emerged as an environmentally friendly and efficient reinforcement method The grouting material is liquid, 2024年7月1日 Enzymeinduced calcium carbonate precipitation technology (EICP) has emerged as an environmentally friendly and efficient reinforcement method The grouting material is (PDF) Mechanism study and optimal proportioning test of pea 2024年1月3日 The results show that: (1) while the introduction of CO 2 significantly reduces the fluidity of a CABM, it can still meet the requirements of pipeline transportation in backfill mines; Experimental study on the production of carbonabsorbing backfill Different binders significantly improved the mechanical properties of red mudbased CPB In addition, the specimens with different binders showed excellent water resistance, and the Experimental Investigation on Red Mud from the Bayer Process for
Experimental Investigation on the Combination of
2024年1月31日 This paper proposes a technique for producing underground backfilling materials using enzymeinduced calcium carbonate precipitation (EICP) technology to address the growing ecological security concerns 2020年7月29日 Shear tests were carried out on the samples to observe the effect of calcium carbonate on the mechanical properties of red clay The results showed that, with increasing Effect of Calcium Carbonate on the Mechanical Properties and 2019年11月1日 A quite a few analytical techniques were employed in studying the thermal decomposition of calcium carbonate Thermogravimetric Analysis (TGA) and Differential Thermal Analysis (DTA) are the methods that have been often used to extract vital thermodynamic and kinetic parameters related to thermal conversion [2, 6, 11, 16]Besides, the application of Thermal decomposition of calcium carbonate (calcite 2024年1月31日 This paper proposes a technique for producing underground backfilling materials using enzymeinduced calcium carbonate precipitation (EICP) technology to address the growing ecological security concerns Experimental Investigation on the Combination of
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Enhanced contaminant retardation by novel modified calcium
2022年2月1日 Enhanced contaminant retardation by novel modified calcium bentonite backfill in slurry hydrodynamic dispersion coefficient (D) and 25][26][27][28], propylene carbonate [29 2023年8月1日 Steel slag, a byproduct of steelmaking, can be used as backfill material for energy structures, and the granite residual soil is a common soil type in civil infrastructure The thermal conductivity of backfill materials and soils surrounding the piles is the crucial parameter which has influence on the heat transfer In this paper, the steel slag and granite residual soil Thermal conductivity enhancement of backfill material and soil 2024年10月11日 The content of calcium carbonate effect on liquidplastic limits and water loss shrinkage Red clay is a special soil with a high liquidplastic limit and water loss shrinkageStudy on microscopic pores and physicomechanical properties of 2020年12月30日 Therefore, the strength properties of MMB samples are not only related to the total calcium carbonate content but also to the crystal form of the calcium carbonate [42] It should be noted that quantitative analysis results of the mineralogical components can only be used as a reference, because the XRD analysis only used the portion of the grinded sample that had a Experimental study on the mechanical properties of microbial mixed backfill
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Experimental study on solidification and remediation of lead–zinc
2023年3月10日 Compared with Fig 8 (a) and (b), it can be seen that there were a large amount of the fusiformshaped, rodlikeshaped and a little sphereshaped calcium carbonate crystals, but when adding 2 cm of lead–zinc tailings formed the solidified lead–zinc tailings samples in small size, widely distributed, and some of the calcium carbonate clumped together to fill the holes Download scientific diagram (a) Coefficient of volume change; (b) coefficient of compressibility as a function of average effective stress during loading for sandbentonite backfills with 5% (a) Coefficient of volume change; (b) coefficient of Microbial induced calcium carbonate precipitation (MICP) is a promising technique for soil improvement However, the commonly adopted bioaugmented MICP approach is in general less compatible with Coefficient of consolidation based on (a) Casagrande's method; (b 2019年10月30日 The percolating solutions may leach in particular carbonates from the applied backfill material and transfer the dissolved calcium ions (Ca 2+) into the main drainage of the tunnel (see Fig 1) This leaching of Ca 2+ from the backfill material may cause durability issues of the used building material and carbonate scaling in the drainageLeaching behavior of carbonate bearing backfill material – An
(PDF) Mechanism study and optimal proportioning test of pea
2024年7月1日 Mechanism study and optimal proportioning test of pea gravel behind TBM tunnel linings reinforcement using EICP technology2022年2月21日 In contrast to sodium bentonite, calcium bentonite exhibits lower swelling and higher hydraulic conductivity [7], but it is considered to be an alternative material for SB wall application if it can be modified [28], [29], [30], [31]This aspect has gained significance recently in countries where highquality natural sodium bentonite is scarce, but calcium bentonite is plentyEnhanced contaminant retardation by novel modified calcium 2006年11月1日 Particularly, carbonaterich geomaterials (eg, limestone, sandstone, calcareous sand) undergo dissolution when exposed to acid rain, resulting in deterioration on their geotechnical stability Stability of calcium carbonate and magnesium carbonate in 1984年1月1日 The precipitation of calcium carbonate from aqueous solutions has been studied at supersaturations sufficient for spontaneous precipitation but low enough to enable highly reproducible experiments Precipitation of Calcium Carbonate in Aqueous Solutions
Leaching behavior of carbonate bearing backfill material – An
2019年10月30日 The percolating solutions may leach in particular carbonates from the applied backfill material and transfer the dissolved calcium ions (Ca 2+) into the main drainage of the tunnel (see Fig 1) This leaching of Ca 2+ from the backfill material may cause durability issues of the used building material and carbonate scaling in the drainage2024年6月20日 Consequently, this occurs at lower supersaturation coefficients (Ω), indicating a more stable state of the solution with respect to calcium carbonate precipitation As seen in Figure 7 , precipitation is possible without reaching the equilibrium pH of the monohydrate calcium carbonate (MCC) for two experiments corresponding to pH stab = 758 and 745Calcium Carbonate Formation in GroundwaterSupplied Drinking 2020年7月29日 Precipitated calcium carbonate was added to red clay at ratios of 0%, 5%, 10%, 15%, The nonuniformity coefficient (C u) is used to indicate the grain composition of soil samples When C u is small, the slope of the grain size distribution curve is very steep, Effect of Calcium Carbonate on the Mechanical Properties and 2020年9月1日 Therefore, calcium carbonate (CaCO 3) whisker was adopted as the foaming stabilizer added to the fresh backfill It has been reported that CaCO 3 whisker improves the pore structure, reduces the number of innerconnected pores and generates a uniform pore size distribution [ 42 ]Rheological and mechanical properties of cemented foam backfill:
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Examining Energy Consumption and Carbon Emissions of
2021年4月26日 Microbial induced carbonate precipitation (MICP) is a new geotechnical engineering technology used to strengthen soils and other materials Although it is considered to be environmentally friendly, there is a lack of quantitative data and objective evaluation to support conclusions about its environmental impact In this paper, the energy consumption and carbon 2024年10月29日 This study aims to investigate the hydraulic conductivity of sodium hexametaphosphate (SHMP)amended sandsodiumactivated calcium bentonite backfill in vertical cutoff walls to contain flow of lead nitrate solutions (Pb(NO3)2), used as simulated lead (Pb)contaminated groundwater Workability of SHMPamended slurry, grainsize distributions Hydraulic conductivity and microscopic properties of sodium The treatment of coal gangue solid waste and microbially induced calcium carbonate precipitation (MICP) consolidate technology is a focus of research at home and abroad MICP technology was used to solidify and cement coal gangue particles and endows them with a certain strength The process does not use the traditional cementitious material (Portland cement) and is eco Experimental study of microorganisminduced calcium carbonate 2018年3月1日 This study is part of large and ongoing investigation into the potential use of calcium carbonate nanoparticles (NCaCO 3 ) to improve the mechanical and physical properties of mine backfillAn Investigation into the Potential Use of Calcium
(PDF) Experimental Study on Macro and Meso ResearchGate
2024年6月27日 Experimental Study on Macro and Meso Characteristics of SteelSlagBased Cemented Backfill Due to Microbial Mineralization Action2024年1月12日 Improving earlyage performance of alkaliactivated slag paste backfill with calcium salts at low temperature Author links open overlay panel Alkaline activators include alkali hydroxide, silicate, carbonate, sulfate, etc [11 respectively Based on the basicity coefficient, the slag is commonly classified into three Improving earlyage performance of alkaliactivated slag paste backfill 2023年9月1日 This study aims to compare the bacteriabased selfhealing methods in metakaolinbased geopolymer mortars In addition, the effects of MicrobiallyInduced Calcium Carbonate Precipitation (MICP) on Characterization and role analysis of bacteria types in selfhealing 2023年12月19日 The results shows that calcium salts, specifically CaCl 2 , CaSO 4 , and Ca(COOCH 3) 2 , can increase the earlyage UCS of AASCPB by up to 1050%, depending on the specific anion involvedImproving earlyage performance of alkaliactivated slag paste backfill
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The mechanism of the thermal decomposition of calcium carbonate
convective heat transfer coefficient [D+ RR'9ek to outer surface of sample eu emissivity of lime hRad radiation heat transfer coefficient 9o gas temperature to outer surfaceof sample 9R temperature of reaction front H molar heat of decomposition of 9s temperature of sample calcium carbonate 9w temperature of furnace walls k thermal conductivity of porous lime A convective 2015年8月1日 This study proposed an isotope‐tagging method to investigate reactions under the atmosphere of product gas To illustrate this method, the calcination kinetics of calcium carbonate Ca¹³CO3 in Advances in Calcium Carbonate Thermal Decomposition2023年9月1日 In this study, the microbially induced calcium carbonate precipitation method was used to treat calcareous sands Onedimensional sand column experiments were carried out to evaluate the permeability and mechanical characteristics of MICPtreated calcareous sands and identify possible optimum solutionsExperimental study on permeability and strength characteristics of 2023年9月15日 Mineralizing bacteria play a crucial role in the biomineralization process, wherein calcium carbonate precipitates are formed through their metabolic activities [9, 10]When cracks occur in cementitious materials, CO 2 and water can penetrate into the cracks, inducing bacteria to facilitate the formation of calcite (CaCO 3) with CO 3 2− ions [11]Characterization and role analysis of bacteria types in selfhealing
Refractive index of CaCO3 (Calcium carbonate, Calcite) Ghosho
Dispersionequation coefficients for the refractive index and birefringence of calcite and quartz crystals Opt Commun 163, 95102 (1999) Calcium carbonate (CaCO 3) is a common inorganic compound that exists in various forms, including calcite, aragonite, and vaterite, 2024年9月18日 Biomediated methods, such as microbially induced carbonate precipitation, are promising techniques for soil stabilisation However, uncertainty about the spatial distribution of the minerals formed and the mechanical improvements impedes biomediated methods from being translated widely into practice To bolster confidence in biotreatment, nondestructive DEM investigation into the smallstrain stiffness of biocemented 2024年3月21日 Calcium carbonate is a common scale in the oil and gas extraction process Scale buildup can lead to blockages in production and downhole pipelines, as well as significant economic and corrosion problems [1,2,3,4,5]Currently, the main factors influencing Calcium carbonate scaling are CO 2, temperature, pressure, pH, and salt contentIn order to solve the Effect of Oil and Pipe on Calcium Carbonate Scaling in Oilfield: Energy μ/ρ μ en /ρ (MeV) (cm 2 /g) (cm 2 /g) 100000E03 4867E+03 4861E+03 150000E03 1714E+03 1710E+03 200000E03 7999E+02 7966E+02 300000E NIST: XRay Mass Attenuation Coefficients Calcium
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Enhanced contaminant retardation by novel modified calcium
2022年2月21日 The most common modification to calcium bentonite is activating it using sodium carbonate to provide sodium cations (Na +) for replacing calcium cations (Ca 2+) on the bentonite [28], [32], [33] This SAB possesses swelling and hydraulic conductivity comparable to the sodium bentonite, but it is sensitive to chemical solutions similar to the sodium bentonite [7], [33]2022年2月1日 In the traditional backfill mining engineering, cement cementation method is generally adopted, but it has high cost and emits a large amount of CO2, which aggravates the greenhouse effectEffect of microbialcemented on mechanical properties of iron 2022年7月11日 Red mud is a byproduct of alumina production, and its disposal can have severe environmental consequences This study experimentally investigates the feasibility of using red mud from the Bayer process for cemented paste backfill (CPB) Different binders and activators were used to improve the mechanical properties, water resistance, and Experimental Investigation on Red Mud from the Bayer Process for 2021年3月1日 In addition, the fair agreement between the numerical and the experimental results reveal that the effects of the differences of the EICPtreatment between this study and Part 1 [7] on the hydraulic properties (WRCs and the saturated hydraulic coefficients) of sand were small Calcium carbonate precipitation in this study was also prone to Bioimproved hydraulic properties of sand treated by soybean
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Microbial‐Induced Carbonate Precipitation: A Review on
2021年12月6日 Based on recent literary sources, this survey discusses the effects of main factors influencing the microbialinduced calcium carbonate precipitation (MICP), including the bacterial species, bacterial concentration, temperature, and pH value2019年7月1日 Request PDF Leaching behavior of carbonate bearing backfill material An experimental and modelling approach Carbon dioxide is known as an important agent in aqueous media to induce chemical Leaching behavior of carbonate bearing backfill material An