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Refractory Ore Definition

refractory dictionary definition refractory definedthe definition of refractory is stubborn or hard to manage, or heat resistant. an example of someone who is refractory is a person who refuses to listen to the rules. an example of something refractory is a material like silica or alumina that are difficult to melt. recovery refractory resourcesrefractory go

refractory dictionary definition refractory definedthe definition of refractory is stubborn or hard to manage, or heat resistant. an example of someone who is refractory is a person who refuses to listen to the rules. an example of something refractory is a material like silica or alumina that are difficult to melt. recovery refractory resourcesrefractory gold ore is gold- containing ore that is resistant to recovery by direct cyanidation and carbon adsorption processes. more specifically, it is an ore that has a gold recovery rate of less than 80% when direct cyanidation is applied to it. refractory definition of refractory by medical dictionarythe coating is comprised of at least one electroplated layer and a color layer comprised of a refractory metal oxide or refractory metal alloy oxide wherein the oxygen content of the refractory metal oxide or refractory metal alloy oxide is a stoichiometric oxygen content layer on the color layer. refractory definition of refractory in english by lexico definition of refractory - stubborn or unmanageable., resistant to a process or stimulus. what are refractory metalsrefractory metals are extracted from ore concentrates, processed into chemicals and then into powders. the powders are consolidated into finished products or mill shapes and ingots for further processing. because of their high melting points and ease of oxidation, refractory metals are usually worked in powder form. use refractory in a sentence refractory sentence examplesa silver ore is either free-milling or refractory, that is, the silver mineral is readily amalgamated or it is not. processing refractory goldgold which has formed an alloy with other metal forming a solid solution is considered refractory, by definition if you cant get recoveries beyond 80% then you can call it a refractory ore, whether its a mineral processing problem or not will depend on the type of refractory, i will consider a mineral processing problem those ores which gold extractiona "refractory" gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals. these ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes. these refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold. refractory gold mining sgsmining refractory gold. physical encapsulation of disseminated gold particles (usually less than a few micrometers in size) within a mineral that is unreactive and impervious to leaching chemical interference by one or more of the ore constituents in the cyanide leaching process. processing of refractory gold oreskeywords. the first is the great differences that exist between refractory ores, a fact that is being increasingly acknowledged in recent publications. these differences include variations in grade, mineralogy and chemical composition. consequently any study will only be relevant to a site specific set of conditions.

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processing of refractory gold oresprocessing of refractory gold ores 1037 the oxidation tanks themselves are often configured in four stages with additional tanks employed in the first stage to accommodate the increased oxidation rates and aeration requirements in the initial phases of the reaction. residence times in the tanks are often of the order of 3 to 4 days. refractory gold ore treatment methodsrefractory gold ore treatment methods. where gold is associated with arsenic, antimony, tellurium, and certain other minerals, it is often only partly soluble in cyanide solution. the difficulty is usually more of a physical than a chemical one but special methods of treatment may be required. refractory definition of refractory by merriam-webstermedical definition of refractory 1 : resistant to treatment or cure a refractory fulminant lesion had disease that was extremely refractory to multiple intensive therapies michelle l. bennett et al refractory definition and meaning collins english dictionarydefinition of 'refractory'. refractory. refractory people are difficult to deal with or control, for example because they are unwilling to obey orders. the situation when a state is confronted by a refractory religious minority. refractory definition and meaning collins english dictionarydefinition of 'refractory'. refractory. refractory people are difficult to deal with or control, usually because they are unwilling to obey orders. refractory priests who refused to side with the king. the cases considered total ore cyanidation, cyanidation of flotation concentrates, and cyanidation of either total ore or flotation concentrates after oxidative pretreatment. for the cases which included flotation, 90% recovery of the sulfide into 10% of the weight was assumed. gold mining process development denver mineral engineersrefractory ore processing methods almost always serve only one purpose, to treat ores that will not liberate their values by conventional cyanide leaching. the refractory ore treatment process is then followed by a conventional cyanidation step. refractory ore processing methods include: bioleaching; autoclaving (pressure oxidation) roasting; clorination refractory definition of refractory by medical dictionarythe period of depolarization and repolarization of the cell membrane after excitation; during the first portion (absolute refractory period), the nerve or muscle fiber cannot respond to a second stimulus, whereas during the relative refractory period, it can respond only to a strong stimulus. refractory goldrefractory gold ore is generally defined as ore containing gold which cannot be satisfactorily recovered by conventional methods used to treat non-refractory gold ores, like gravity concentration or cyanidation. cause. refractory mineral encyclopedia.comrefractory mineral mineral resistant to decomposition by heat, pressure, or chemical attack. most commonly applied to heat resistance.

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office of wastewater managementhardrock mining wastes. leached ore from the leached pad to a final disposal area, such as in a valley-fill, waste piles, or an exhausted portion of an open pit. off-loaded spent ore may contain low levels of contaminants, target minerals, and sulfur-bearing minerals. processing of refractory gold oresin the simplest of terms these are refractory ore bodies. reasons for ores being refractory will be highlighted. in addition to deposits that are totally refractory, another increasingly common occurence is where the surface ore body is well oxidized and non-refractory and frequently overlays large tonnages of non-oxidized refractory ore. what is furnace, and types of furnace.definition of furnace- a furnace is a device in which the chemical energy of fuel or electrical energy is converted into heat which is then used to raise the temperature of material, called the burden or stock, placed within it for that purpose. refractories(rĭ-frăktə-rē) adj. 1. showing or characterized by obstinate resistance to authority or control: refractory children; refractory behavior. 2. difficult to melt or work; resistant to heat: a refractory material such as silica. 3. resistant to treatment: a refractory case of acne. refractory ore chemistry britannica.comother articles where refractory ore is discussed: gold processing: extraction from refractory ores: many gold-bearing ores and concentrates are not readily amenable to cyanidation, owing to the presence of substances that consume the cyanide reagent before it can dissolve the gold, preferentially adsorb the gold as it dissolves (a phenomenon called preg-robbing), or completely surround the calcined bauxite, refractory grade bauxite, abrasive bauxite.as one of the most professional calcined bauxite manufacturer in china, sinocean bauxite mainly operate manufacturing export business on high quality calcined bauxite and other industrial material about bauxite, including: refractory grade bauxite, abrasive grade bauxite, welding grade bauxite, bauxite for cement, bauxite for paint, brown fused alumina, white fused alumina, tabular processing refractory goldprocessing refractory gold (14 replies) refractory ores are normally have either a high sulfide content that masks the gold preventing cyanide leaching of the gold, or high organic content that also block gold leaching (reabsorbs the gold), or it can have a high clay content that also soaks up the cyanide. refractorydefine refractory. refractory synonyms, refractory pronunciation, refractory translation, english dictionary definition of refractory. adj. 1. showing or characterized by obstinate resistance to authority or control: refractory children; refractory behavior. 2. difficult to melt or work; refractory definition of refractory at dictionary.comnoun, plural re·frac·to·ries. a material having the ability to retain its physical shape and chemical identity when subjected to high temperatures. refractories, bricks of various shapes used in lining furnaces. biooxidation"in refractory ores, small particles of gold are covered by insoluble sulfides impeding the contact between cyanide and gold. in this case, a pretreatment stage must be considered, such as pressure oxidation , chemical oxidation , roasting or bio-oxidation, the latter currently being the alternative of choice.