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microwave pretreatment of a double
Microwave pretreatment of a double refractory gold ore
2007-9-1 In this research, microwave roasting of a double refractory gold ore was investigated as an alternative method and the results were compared to those obtained by conventional
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Microwave pretreatment of a double refractory gold ore
2007-9-1 Nanthakumar et al. (2007) investigated the use of microwave energy in pretreating a double refractory gold ore containing 1.56% sulphur and 5.96% total carbon. Wei et al (2009)
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Microwave pretreatment of a double refractory gold ore
2007-8-31 Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide
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Microwave pretreatment of a double refractory gold ore
2007-9-1 Extraction of Gold from a Low-Grade Double Refractory Gold Ore Using Flotation-Preoxidation-Leaching Process. Yong-bin Yang, Liu Shiqian, Bin Xu, Qian Li, T. Jiang, P. Lv.
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microwave pretreatment of a double zygomat.fr
Microwave pretreatment was carried out on milled straw with an irradiation time of 15 minutes, at a temperature of either 200 or 300 °C in the oven. Sep 01, 2007· In this paper, microwave
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Microwave Pretreatment ScienceDirect
2015-1-1 Microwave pretreatment of rape straw for bioethanol production: focus on energy efficiency. Bioresour Technol, 102 (2011), pp. 7937-7940. Effect of microwave double
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search results microwave pretreatment of a double
Microwave pretreatment of a double refractory gold ore. Abstract Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter
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Microwave Pretreatment Of A Refractory Gold
Microwave pretreatment of a double refractory gold ore 2007-9-1 With regards to the application of microwaves to refractory gold ores, Haque, 1987a, Haque, 1987b has studied
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Microwave Pretreatment Request PDF ResearchGate
2014-9-18 Microwave pretreatments were employed by immersing the biomass in dilute alkali solutions (NaOH and KOH) at concentrations of 0, 0.75, and 1.5% (w/v) for microwave
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Do not surround your terms in double-quotes ("") in this field. With at least one of the words: Find any of these words, separated by spaces. Without the words: Exclude each of these words,
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Microwave Pretreatment Request PDF ResearchGate
2014-9-18 Microwave pretreatments were employed by immersing the biomass in dilute alkali solutions (NaOH and KOH) at concentrations of 0, 0.75, and 1.5% (w/v) for microwave-assisted heating times of 6, 12
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Microwave Pretreatment on Copper Sulfide Ore:
2021-7-8 The aim of this paper is to assess the effect of microwave treatment on copper sulfide ore for ball milling and bed breakage. Liberation analysis of ground products in eight size fractions showed that microwave pretreatment liberated more chalcopyrite particles from the bed breakage product than the ball mill product. In bed breakage, microwave pretreatment caused a 2%
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Microwave Pretreatment and Enzymolysis Optimization of
2019-3-27 The effect of the microwave pretreatment time on the DH under 800W microwave power after 15 to 210 s is shown in Figure 2. The variation of DH varied significantly (p < 0.05) from one interval time to the other. The DH values as a function of exposure time ranged from 11.25 to 25.7%, and the results showed that the DH of the lotus seed proteins
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(PDF) Utilization of microwave and ultrasound
2011-8-1 using a double-sided carbon tape and coated with gold of. (75.8 ± 0.9%) were obtained for microwave pretreatment characterized by the following parameters: 300 W, 54 PSI, 15 min. Such pre
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The effect of microwave pretreatment on anaerobic co
This paper studied the effect of microwave (MW) pretreatment on anaerobic co-digestion of sludge (SS) and food waste (FW). Using SS and FW as digestive substrates, the MW pretreatment method was used to determine the changes in the substrate matrix by means of batch anaerobic digestion at 37 °C. The kinetics of methane production were
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A Study of Biomass Material Pretreatment by Microwave
2011-10-1 This study discussed the application of microwave-based heating for the pretreatment of biomass material, and selected Pennisetum purpureum for pretreatment. The Taguchi method was used to plan optimization experiments for pretreatment parameter levels, and measured the dynamic responses. With lower frequency of experiments, this study analyzed and determined
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The effect of acid concentration and irradiating time under
Download scientific diagram The effect of acid concentration and irradiating time under microwave pretreatment on the pH of liquid fraction of pretreated EFB from publication: Microwave Assisted
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Improving the Biogas Potential of Rice Straw Through
2021-6-9 Microwave pretreatment is a common physical method of pretreating crop straw before AD. It leads to many potential advantages such as better heat penetration and uniformity, and shortened processing time,and has been widely used in food processing and bio-refinement [11,12,13,14,15,16].
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mechanism thermodynamics, activation energy, and
16 24.72%/min at P0 to -28.01%/min at P700 after microwave pretreatment, and the 17 residual mass decreases from 31.81% at P0 to 26.71% at P700. In addition, microwave 18 pretreatment leads to a decrease in activation energy, ∆H, and ∆G at the end of the 19 pyrolysis (α>0.7). The solid reaction mechanism of CS pyrolysis is revealed by the Z-
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Enhancement of Uranium Recycling from Tailings Caused
2022-7-6 The microwave irradiation experiments were categorized into two different systems by the module combination: (i) the sequential system including microwave pretreatment and sequential oxidant-participated leaching experiments and (ii) the coupling system of the microwave irradiation combined with the leaching experiments with oxidants.
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Microwave pretreatment of a double refractory gold ore
Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of gold from solution during cyanide leaching. One possible remedy is to roast the ore and thus oxidize the pyrite and remove the organic carbon. In this research, microwave roasting of a double refractory gold ore was
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Microwave pretreatment for enhanced selective nitric acid
2021-11-22 As clean energy, the microwave is commonly used to pretreat various ores. In this work, the microwave dielectric properties of limonitic laterite ore were measured by resonant cavity perturbation technique and the effects from microwave were systematically investigated. Results indicated that limonitic laterite had high microwave absorbance. After microwave
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Microwave Pretreatment of Seeds to Extract High Quality
2011-9-28 Microwave energy is a superior alternative to several other thermal treatments. Extraction techniques are widely employed for the isolation of bioactive compounds and vegetable oils from oil seeds. Among the different and new available techniques, microwave pretreatment of seeds is a simple and desirable method for production of high quality vegetable oils.
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Microwave Pyrolysis Pretreatment of High Arsenic
2021-11-22 The process optimization and mechanism of microwave pyrolysis in a nitrogen atmosphere were studied to improve the gold leaching rate for high-arsenic-refractory gold sulfide resources, mainly containing minerals of elemental sulfur, dense pyrite, and arsenopyrite. The decomposability was evaluated using thermodynamic and thermogravimetric analyses. Faster
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Microwave-assisted acid pretreatment for enhancing
2020-8-29 Sugarcane trash (ST) is an abundant but underused biomass left in the field when the sugarcane is harvested. However, there are only a few studies to evaluate pretreatment of the residual bioresources for enzymatic saccharification. In this study, we aimed to explore the effects of combined severity factor (CSF), resulted from the use of different acids (phosphoric, maleic,
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(PDF) Utilization of microwave and ultrasound
2011-8-1 using a double-sided carbon tape and coated with gold of. (75.8 ± 0.9%) were obtained for microwave pretreatment characterized by the following parameters: 300 W, 54 PSI, 15 min. Such pre
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Microwave-assisted hydrotropic pretreatment as a new
2021-4-9 Abstract Aim of the study was to assess the suitability of the combined use of microwave radiation and sodium cumene sulfonate under optimized process conditions for the preparation of maize stillage biomass as a raw material for the production of cellulosic ethanol. The key parameter guaranteeing a high level of lignin removal from biomass (ca. 44%) was
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Effects of Ultrasonic and Microwave Pretreatment on Lipid
2020-10-12 The extraction of lipids from microalgae cells of Botryococcus braunii and Chlorella vulgaris after ultrasonic and microwave pretreatment was evaluated. Cell disruption increased the lipid extraction efficiency, and microwave pretreatment was more effective compared with ultrasonic pretreatment. The maximum lipid yield from B. braunii was 56.42% using microwave
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The effect of acid concentration and irradiating time under
Download scientific diagram The effect of acid concentration and irradiating time under microwave pretreatment on the pH of liquid fraction of pretreated EFB from publication: Microwave Assisted
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Enhancement of Uranium Recycling from Tailings Caused
2022-7-6 The microwave irradiation experiments were categorized into two different systems by the module combination: (i) the sequential system including microwave pretreatment and sequential oxidant-participated leaching experiments and (ii) the coupling system of the microwave irradiation combined with the leaching experiments with oxidants.
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