Qarhan Salt Lake contains approximately 296 million tonnes of low-grade solid potash ores. The exploitation and utilization of this low-grade solid potash ore represents the fundamental framework for the sustainable development of Qarhan Salt Lake's potash fertilizer industry. It also alleviates the shortage of potash resources of China. In this …
— The effect of solvent chemistry on potassium dissolution extraction from low-grade solid potash ore in Qarhan Salt Lake, China. Appl. Geochem. 115, 1–11 (2020).
— Iodine is capable to extract gold a very fast (average dissolution rate of 65.679 mg·h −1 ·cm ... F. & Wuth, W. Silver extraction from a refractory type ore by thiourea leaching ...
— In this study, the dissolution conditions and dissolution kinetics of copper from malachite in the presence of organic acid (C4H6O6) as an organic leaching reagent were examined. The effects of particle size, acid concentration, time, solid/liquid ratio, temperature, and mixing speed on the dissolution process of copper were investigated. …
— 1.. IntroductionThe increased demand for nickel has depleted the more easily extractable Ni sulphide deposits, which account for ~. 30% of the world's Ni resource, and has caused the mining industry to look towards acid extraction of lateritic nickel (accounting for ~ 70% of the world's Ni resource). Difficulties in the extraction of Ni from lateritic …
— The results are shown in Fig. 1 which indicates that the increase of time on the dissolution of copper oxide ore produced an increase in the dissolution of copper, cobalt and iron. However, it was noticed that the copper leaching began to reach equilibrium state at 60 min so is iron leaching whilst at the same equilibrium time interval cobalt ...
— Thus, for successful extractions, the impurity content in the oxide mineral ore and choice of extraction method and/or extraction agents are key [11]. ... dissolution and extraction techniques suitable for complex Nb-Ta mineral ore matrices or concentrates largely depend on certain factors. Apart from the physicochemical properties, such as ...
— This assumption was supported by observing 72% extraction of gold from ore into the solution in the CIL-1 test, while longer retention time (36 h) enhanced the …
Evaluation on liquefaction eect of potassium dissolution extraction from low‑grade solid potash ore in Qarhan Salt Lake, northern of Tibetan Plateau Yachao Song1 · Han Hu1 · Chuanyong Ye2 · Yuanyi Zhao 2 · Lichun Ma2 · Juan Zhang3 · Qunxiong Yan3 · Yuhan Lin 3 Accepted: 18 March 2024 / Published online: 20 April 2024
— The total amount of copper bioleached from the lateritic ore by reductive dissolution was 78 % (based on the copper content of the laterite from aqua regia dissolution). ... Johnson DB, Grail BM, Hallberg KB (2013) A new direction for biomining: extraction of metals by reductive dissolution of oxidized ores. Minerals 3:49–58.
— This study discusses the operating variables for removal of cadmium from phosphate ore using Na 2 EDTA. These variables include the reaction time, Na 2 EDTA concentration, liquid/phosphate ore ratio, number of extractions and microwave extraction. Na 2 EDTA induced a two-step extraction process including a rapid extraction within the …
— The primary aim of this study was to investigate the boron leaching process from alkali-activated ludwigite ore. Initially, the ore underwent activation through roasting at 1050 °C for 60 min with 20% sodium carbonate. Subsequently, the study examined the influence of leaching parameters, including temperature, time, liquid-to-solid ratio, and …
DOI: 10.1252/JCEJ.14WE032 Corpus ID: 94625555; Extracting Copper by Lactic Acid from Copper Oxide Ore and Dissolution Kinetics @article{Deng2015ExtractingCB, title={Extracting Copper by Lactic Acid from Copper Oxide Ore and Dissolution Kinetics}, author={Jiushuai Deng and Shuming Wen and Jian-ying Deng and Dandan Wu and Jing …
— This work presents a detailed analysis of the effect of sodium and calcium hypochlorite species, HNO3, HCl, H2SO4 and pH on the kinetics and efficiency of silver …
— Most gold deposits occur associated with sulphides like pyrite and arsenopyrite; thus, precious metal dissolution is possible by oxidizing auriferous sulfide concentrate using simultaneous pressure …
— Abundant resources of magnesium silicates make an interesting prospect for long-term storage of CO 2 by mineral carbonation. Several carbonation processes proposed in literature for CO 2 storage employ extraction of silicate minerals using a liquid solvent. In this study, the dissolution of natural serpentinite in respective solutions of acids, bases …
— The mechanisms responsible for invisible gold enrichment driven by coupled dissolution-reprecipitation reaction (CDR) are debated. Here we report the micro- to nano-scale textures of arsenian ...
— Monazite is a poorly soluble mineral of rare earth phosphate. It is an ore of the rare earths which is difficult to break down; in industry either concentrated sulphuric acid or caustic soda is used to attack finely ground monazite at between 140 °C and 400 °C. In these processes, the rare earths are converted into different solid compounds, …
— China, being the world's largest consumer of potassium fertilizer, faces signi cant challenges due to limited potassium reserves. Qarhan Salt Lake stands out as a reservoir containing 296 million tons of low-grade solid potash ore (KCl), establishing itself as the premier potassium fertilizer production base in China. The extraction of low-grade …
Gold dissolves readily in aqueous chloride solution in the presence of an appropriate oxidizing agent (such as chlorine, nitric acid, or ferric ions) to form the tetrachloroauric …
— Thiourea (Tu) leaching of gold is an alternative lixiviant for treating sulfide gold ores and concentrates. The present study investigated the leaching behavior of Au from sulfide gold ore concentrates obtained …
— In this study, an additional stage in the processing of an arsenopyritic refractory gold ore was studied. Arsenic extraction in an alkaline pretreatment was …
— This manuscript reports the mechanistic and thermochemical aspects of the oxidative dissolution of an ore based on pyrite, which hosts sulfides of copper and silver.
— For a limonite- bearing gold ore, as high as 94.3% of gold extraction was achieved and the consumption of thiosulfate merely achieved at 1.12 kg/t under the conditions of 0.1 mol/L Na2S2O3, 0.06 mol/L EDA, 0.005 mol/L CuSO4, and 1.5 kg/t CTAB (cetyltrimethyl ammonium bromide).
— There is a huge variety of wastes and chemical elements therein depending on the numerous techniques of ore extraction (Changul et al., 2010). Therefore, it is important to incorporate the detailed information about the ore extraction processes in the remediation plan (Fig. 1). 5.7. Rehabilitation considering climate and hydrology
Mohapatra et al., also examined the effect of laterite ore in various forms such as raw ore, calcined ore, and calcined ore and then soaked in dilute sulfuric acid, before bacterial dissolution. The results of this study showed that the highest percentage of nickel extraction with calcined ore at 600 °C for 31 days was obtained at a pH of 1.5 ...
— Then their further analysis showed that temperature and reaction time are the main factors affecting the dissolution of lithium minerals ... Taking global warming potential as an example, the intensity of lithium extraction from ore is 15.69 tCO 2eq /t, 47.7 times that from brine (0.33 tCO 2eq /t) (Jiang SY et al., 2020).
— The average dissolution rate of investigated reagents at 25 °C shows following order: aqua regia > iodine > bromine > cyanide > thiourea > thiosulfate > MSA.
— As Fig. 5 indicates, dissolution of zinc was affected by changes in stirring speed. The results show that the leaching rate of zinc increases quickly below 400 rpm and remains almost constant beyond this speed to 600 rpm. The zinc extraction increases from 36.46% to 85.93% with an increased stirring speed from 100 to 400 rpm.
Refractory gold ore contains sulfide minerals like pyrite, chalcopyrite and sphalerite that are difficult to be directly leached by cyanidation or by lixiviants such as thiourea and halides. ... reported that the gold dissolution rate in hypochlorite solution was higher than in the cyanidation process, due to the presence of hypochlorous acid ...
— Microbial leaching process offers a likelihood to get hold of metals from low grade mineral resources where metals are made to undergo dissolution from their mineral sources with the help of certain naturally occurring micro-organisms which cause the transformation of elements so as to make the elements available for extraction from a …
