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using a sodium carbonate bicarbonate mix. Acid leach is the preferred method, but in cases where the acid consumption is very high, mostly caused by gangue minerals, it makes more sense to consider alkaline leach. The selection of acid or alkaline leach is based on a number 445-456_Venter:text 2/14/09 12:05 PM Page 446
The dissolution of carbonate gangue minerals, which are often ubiquitous in copper deposits, leads to the consumption of large amounts of acid during the leaching of such ores, which can make the ...
Removal of carbonate gangue is desirable prior to acid pressure leaching when a refractory gold-bearing sulfide ore contains a significant amount of carbonate minerals.
Alternatively, a mixture of sodium carbonate and sodium bicarbonate can be used if the ore gangue has a high acid consumption. The choice of a carbonate or acid leaching route is based on the consumption of each chemical by the ore matrix or host rock, reagent availability, and .
The acid leaching was carried out at 343–353 K and a magnetic stirrer was used for agitation. The solution was filtered through Whatman filter paper and residue was washed thoroughly with hot water until pH increased to6–7. The samples collected after roasting, water and acid leaching were examined for the presence of reaction products.
ferous minerals, particularly in the carbonate type ore, considerably reduces the susceptibility to ef-fective liberation. A beneficial effect of non-oxidative leaching of carbonate gangue with sulfuric acid on copper ore flotation was presented in the paper. It was shown that the non-oxidative leaching of
Phosphate released by gangue minerals such as apatite can cause the formation of this layer however. When leaching with acidic ferric solutions, sulphate media is superior to chloride media. Alkaline carbonate leaching was also found to be effective for brannerite leaching, albeit much slower than acid leaching.
Copper extraction and acid consumption data are correlated with temperature in the range 50-150°C and quenched pH in the range 0.25-2. Adverse changes in the chemical composition of the leach solution and the formation of gangue-mineral alteration products and secondary sulfides can severely limit the extraction of copper above 90°C. Keeping the pH below the self-buffered value of about 2 ...
to reduce/eliminate carbonate content by leaching the ground phosphate rock with dilute hydrochloric acid solution. Effects of hydrochloric acid concentration, reaction time, temperature and liquid/solid ratio (vol./wt. basis) on the process have been studied. Under the reaction
acid during the leaching of such ores, which can make the process un-economical (Habashi, 1970, 1980; You-Cai et al., 2013). Table 1 shows the acid consumption and estimated time to complete the dissolution of major carbonaceous materials in 10 g/L sulfuric acid solutions. It can be seen that for acid leaching, each ton of carbonate mineral (e.g.
gangue minerals effects Mining Wikipedia Mining is the extraction of valuable minerals or other geological materials from the earth usually from an orebody, lode, vein, seam, reef or placer deposits.
Anything graphite based CCB Zen and hopefully much more . There are two ways of obtaining a commercial concentrate or product repeated regrinding and floating up to seven times to purify the concentrate or by acid leaching dissolving the gangue with hydrofluoric acid for a silicate gangue or hydrochloric acid for a carbonate gangue In milling the incoming graphite products and concentrates
improved using hydrochloric acid leaching to dissolve the carbonate minerals in the concentrate. The effects of three dominant parameters on the leaching performance, that is the leaching time, leaching temperature and hydrochloric acid concentration were investigated, and then a flotation-leaching process was proposed for processing of the
Concrete degradation may have various causes.Concrete can be damaged by fire, aggregate expansion, sea water effects, bacterial corrosion, calcium leaching, physical damage and chemical damage (from carbonatation, chlorides, sulfates and non-distilled water).This process adversely affects concrete exposed to these damaging stimuli.
Economic geologists divide hydrothermal minerals into ore minerals (economically valuable) and gangue minerals (economically worthless). While some hydrothermal ore minerals occur as native metals or alloys, most consist of a metal combined with another non-metallic element or anion group – examples are shown in Table 2.Gangue minerals usually consist of common silicate, oxide, carbonate .
Heap leaching accounts for a fifth of global copper production, sourced primarily from porphyry ores, yet metal recoveries are often not optimal. Gangue, and its interaction with acid, plays an important role in such processes. Thus, a proper understanding of gangue minerals present in the ore, their textural relationships relative to particle size distribution, reactivity with acid under ...
During the acid leaching of uranium, gangue–reagent interactions have both negative and positive con-sequences. Gangue dissolution increases reagent costs, and in some cases can prevent the economic acid leaching of an ore, but can also increase uranium mineral .
Muriatic Acid. Now we are going to get more aggressive with our mineral cleaning technique. Hydrochloric Acid is available in most hardware store as Muriatic Acid. It is sold in one gallon containers and is used to clean masonry and as a rust remover, which is what we will use it for. In spite of it's availability, it is dangerous.
Antimony Gangue Mineral Processing Wastewater Mineral Processing ... Leach Residue Mineral Processing Refining Dross Mineral Processing Slag and Furnace Residue Mineral Processing Sludge from Treating Process Waste Water Mineral Processing Stripped Anolyte Solids Mineral Processing ... Lithium Carbonate Acid roaster gases Extraction/Beneficiation
Table 2. Acid baking (Gupta & Krishnamurthy, 2004) is a general solution to leach REE selectively limiting acid reaction with gangue minerals and iron. This method and its variations have been tested on Montviel concentrate at SGS Minerals (Lakefield site) in 2013. The result showed that REE extractions of
minerals Article Study of the Extraction Kinetics of Lithium by Leaching -Spodumene with Hydrofluoric Acid Gustavo D. Rosales 1, María C. Ruiz 2 and Mario H. Rodriguez 1,* 1 Laboratorio de Metalurgia Extractiva y Síntesis de Materiales (MESiMat), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Mendoza 5500, Argentina; gd_rosales@hotmail
deposits, carbonate minerals are the main gangues, and consequently, the processing and profitability of these types of resources is difficult [7]. Calcareous phosphate flotation can be applied when carbonate minerals are well crystallized and phosphate particles are detached from other gangue minerals.
to leach Zn. However, for the low-grade zinc ores containing high -bearing and carbonate minerals Fe contents, the use of sulfuric acid will result in high acid consumption, poor leaching, and complex purification process (Mahdi et al., 2013; Zhao et al., 2000). Xu et al. (2012) used sulfuric acid to leach
The extraction of manganese from a semi-oxidized manganese ore was investigated with sucrose as the reducing agent in dilute sulfuric acid medium. The kinetics of leaching manganese from the complex ore containing MnCO3 and MnO2 was also investigated. The effects of sucrose and sulfuric acid concentrations, leaching temperature and reaction time on the total Mn (TMn), MnO2 and MnCO3 leaching ...
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