This study investigated the leaching and electrowinning of antimony from a complex high arsenic and gold containing stibnite concentrate ore As Au Sb ore using slurry electrolysis SE The results indicated that the leaching efficiency of antimony was higher than 98% and those of iron and arsenic were about % and % respectively
Under optimized conditions roasting carbonaceous gold ore with 10 wt% NaCl at 800 ℃ yielded to % gold % zinc and ＜5% iron volatilization respectively After grinding the chlorination residue to < mm particle sizes % vanadium was recovered by water leaching extraction at 80 ℃ 10 1 liquid solid ratio 500 r/min
The most common reagent is iron power due to its low price Celep O Alp I Deveci H 2011 Improved gold and sliver extraction from a refractory antimony ore by pretreatment with alkaline sulphide leach Hydrometallurgy 105 234 239 Article Google Scholar Jin SB et al 2009 Influence of antimony on refractory gold ore roasting and
In the air oxidation roasting process the major components FeAsS FeS 2 of the sulfide refractory gold ore would convert into iron oxides arsenic oxides sulfur oxides sulfate and arsenate Mikhail and Turcotte 1992 Especially arsenic is easily oxidized to As 2 O 3 or As 2 O 5 when heats in air and As 2 O 3 is easy to volatilize
Metallurgical extraction of antimony Sb currently has the limitations of high energy consumption and adverse environmental impact In this study we proposed a cleaning process to extract Sb by metallurgy and beneficiation based on S fixing and reduction roasting of Sb2S3 Metallic Sb can be obtained directly by using zinc oxide ZnO and carbon as sulfur
In this study an innovative technology of suspension reductive roasting and magnetic separation SRMS was used to treat the iron bearing manganese ore for comprehensive recovery of iron and
Materials and reagents All the reagents used in the experiment such as sulfuric acid H 2 SO 4 nitric acid HNO 3 copper sulfate CuSO 4 sodium thiosulfate Na 2 S 2 SO 3 and sodium hydroxide NaOH were analytically pure and the water used in the whole experiment was deionized water with the electrical resistivity of MΩ The refractory
No 1 was a cupreous iron pyrites which was roasted in heaps and subsequently smelted in a blast furnace No 2 was a dressed ore containing copper mainly in the form of copper pyrites with smaller proportions of bornite and copper glance It was calcined in a reverberatory furnace
ROASTING OF SULFIDE MINERALS metals such as antimony bismuth cadmium cobalt mercury and molybdenum occur as sulfide minerals Sulfides are not reduced with the most widely used redu cing agents carbon and hydrogen because the free energy change for the reactions Ore fines may be sintered due to incipient fusion in Dwight Lloyd
Principally the quotations are from the early to late 1670s focussing specifically on making regulus of iron and antimony to further produce a philosophic double mercury that was animated by several distillations and subsequently caused swelling and putrefaction in gold the alchemists named this heart of antimony ore after Regulus the
Dead roasting is recommended when the pyrites have no trace of arsenic and when high metal recovery is critical Iron sulfides are transformed into iron oxides with the production of sulfuric acid being an important output of this process in terms of ensuring its economic viability In a typical pyrite roasting plant gas temperatures can be over
Roasting of sulfides in general is exothermic and hence the temperature of the ore lump remains high enough for the desired chemical reactions to occur fairly early during the roasting process Every particle gets oxidized from the outside which leads to the formation of a case of solid product and leaves a core of unchanged zone
Aiming at these problems we present a new method of sulfur fixing roasting of antimony sulfide This method uses ZnO as a sulfur fixing agent and roasting with Sb2S3 was carried out at 673 K
operation to obtain iron sulfide concentrate which can be sold directly or roasted to regenerate into iron oxide Keywords stibnite concentrate; extraction of antimony; reductive sulfur fixing smelting; low temperature; molten sodium salt 1 Introduction China has abundant reserves of antimony resource and it s also the largest producer of
This study investigated the leaching and electrowinning of antimony from a complex high arsenic and gold containing stibnite concentrate ore As Au Sb ore using slurry electrolysis SE The results indicated that the leaching efficiency of antimony was higher than 98% and those of iron and arsenic were about % and % respectively
Antimony production involves hydrometallurgy and pyrometallurgy the latter being still dominant The conventional extraction of antimony from stibnite and jamesonite involves a two step pyrometallurgical process comprising volatilization roasting and carbothermal smelting Ouyang et al 2019; Tian et al 2016 The sulfide antimony ore is first volatilized and
Leaching of Sb 2 S 3 ore in an alkaline system involves the combination of sodium sulphide Na 2 S and sodium hydroxide NaOH to form a solution of sodium thioantimonite as shown in reactions 1
Depending on the type of roasting the behavior of arsenic antimony and bismuth species during the experiments is analyzed to produce wustite FeO metallic iron Fe and CO 2 In the second step Sb 2 S 3 reacts with CO 2 to produce Sb 2 O 3 which is further Lu W ; Xiao H Arsenic Removal from Copper Silver Ore by Roasting in
The higher slope of the straight line indicates that the rate constant of the reaction is larger It shows that ultrasound can promote the reaction So that sodium sulfide can react fully with antimony ore Fig 10 is plotted with ln k r for ln C Na2S The apparent response series of sodium sulfide concentration were and respectively
The roasting temperature ratio of lignite to iron ore roasting time and grinding time of roasted samples were four main factors which had effects on the recovery and grade of iron concentrate Through corresponding four groups of experiments optimum magnetic roasting conditions were obtained as the following roasting at 800 ℃ for 30 min
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