Extracting antimony from high arsenic and gold-containing stibnite ore
Ye et al. (2015) proposed a low-temperature molten salt smelting process that could directly produce antimony from its ore. Zinc oxide (ZnO) was added as a desulfurization agent, and sulfur was fixed in the form of ZnS. ... Although the antimony leaching rate was found to reach >94% and 98% in the respective studies, some of the problems were ...
Possibilities for the Environmental Processing of Gold …
The hydrometallurgical process usually involves the concentration of metals from the leaching ore process, dissolving the metal or metal compound in a solution where other reagents are present. ... an hour, 2 h, 3 h, 4 h, and 5 h. These samples showed us the process of leaching arsenic, antimony, copper, and iron. The remaining volume of the ...
Unlocking Antimony
The limits, effective from September 2024, apply to six kinds of antimony-related products, including antimony ore, antimony metals and antimony oxide. The rules also ban the export of gold-antimony smelting and separation technology without permission. ... Direct leaching of antimony from suitable minerals such as Stibnite and Jamesonite ...
Leaching of Oxide Copper Ores by Addition of …
In this study, weak acid in the curing and leaching stages of copper ore was incorporated, and we analyzed its effect on the dissolution of copper and final impurities. The weak acid corresponds to a wastewater effluent from sulfuric …
Three Methods To Antimony Ore Beneficiation And Processing
Antimony is a non-renewable strategic mineral resource and an indispensable and important raw material for modern industrial development. With the high-intensity resource mining in recent years, the consumption of antimony resources is too large. Antimony beneficiation methods are important to improve the recovery rate of antimony ore.
Preparation of Antimony Sulfide and Enrichment of Gold by …
However, during this treatment, up to 10.3% of the gold in the ore will be dissolved into the leaching solution, and this gold will be precipitated during electrowinning before the antimony in the leaching solution is reduced; the antimony produced in this solution system contains not only a large amount of sodium salt, but also gold [15,16,17 ...
A selective process for extracting antimony from refractory gold ore
The clean production process for extracting antimony from refractory gold ore involves sodium sulfide leaching, pressure oxidation, concentration, and crystallization steps. First, the stibnite in the refractory gold ore reacts with sodium sulfide, and antimony is dissolved into the leaching solution in the form of sodium thioantimonite (Eq. (1 ...
SELECTIVE EXTRACTION OF MERCURY AND ANTIMONY …
method to ore ground to approximately 80-mesh, 96.0 percent of the mercury in the ore was recovered in a cinnabar concentrate that assayed 80.3 percent Hg and 1.3 percent Sb. The antimony product contained 80.7 percent of the antimony; it assayed 0.82 percent Hg and 62.3 percent Sb. The mercury product contained 11.6 percent of
Beneficiation of antimony oxide ore: A review
Kang D.P. found that using either acid or alkaline leaching on antimony oxide ore, resulted in leaching rates of antimony that were less than 70% [33]. This prompted researchers, when dealing with antimony oxide ore from Lengshuijiang Stannary in Hunan, to first carry out a carbon reduction to convert this highvalence state antimony to a lower one.
These Copper Oxide Ore Beneficiation Methods Greatly …
It is difficult to achieve the requirements of copper oxide ore beneficiation using conventional magnetic separation and gravity separation methods. However, copper oxide ore beneficiation usually involves methods such as flotation, leaching and hydrometallurgical processes, each of which aims to maximize the recovery of valuable copper while minimizing …
Gold Leaching from an Oxide Ore Using Thiocyanate as a …
Thiocyanate (SCN –) is a promising alternative to cyanide as a lixiviant for gold extraction and is 1000 times less toxic than cyanide.In this study, the following leaching parameters were tested to optimize the gold recovery for the first time from an oxide ore using the response surface methodology: initial thiocyanate concentration (10–500 mM), initial Fe 3+ …
Leaching kinetics of antimony-bearing complex sulfides ore …
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 5.50% and 1.14%, respectively.
Leaching Kinetics of Antimony from Refractory Gold Ore …
The process included three steps: 1) leaching of antimony from the refractory gold ore with sodium sulfide solution; 2) pressure oxidation of the leaching solution containing sodium thioantimonite ...
(PDF) The metallurgy of antimony | Corby Anderson
Antimony xide also finds growing use as a catalyst for PET production. Antimony pentoxide and sodium antimonate, NaSb(OH)6, are also used as flame retardants. Antimony compounds, primarily sodium antimonate, are also used in decolorizing and refining agents for optical glass and CRT glass. In the electronics industry, Sb use grows for diodes.
CN103866121A
The invention discloses a method for preparing sodium antimonate from an antimony oxide ore via an alkaline approach. The method comprises the following steps: (1) leaching the antimony oxide ore, (2) purifying filtrate, and (3) oxidizing the purified filtrate. The method is high in recovery rate, the leaching rate of antimony is 95-99%, the direct recovery rate of sodium antimonate is …
Production of high-grade antimony oxide from smelter slag via leaching
The process included three steps: 1) leaching of antimony from the refractory gold ore with sodium sulfide solution; 2) pressure oxidation of the leaching solution containing sodium thioantimonite ...
Beneficiation of antimony oxide ore: A review | Request …
Antimony oxide ore beneficiation has become one of the world's largest mineral processing conundrums. In recent years, many experimental studies dealing with antimony oxide ore have been carried ...
A selective process for extracting antimony from refractory …
Antimony can be selectively removed from refractory gold ore by sodium sulfide leaching. Antimony was recovered in the form of sodium pyroantimonate product by pressure …
Gold Leaching from an Oxide Ore Using Thiocyanate as a …
In this study, the following leaching parameters were tested to optimize the gold recovery for the first time from an oxide ore using the response surface methodology: initial thiocyanate ...
Leaching kinetics of antimony-bearing complex sulfides ore …
The leaching rates of 96.47% for Mn and 19.24% for Fe were obtained under the optimized conditions of mass ratio of CaS to manganese oxide ore 1:6.7, L/S ratio 5:1, stirring speed 300 r/min ...
Antimony Leaching from Stibnite and Complex Ores
It is believed that acidic conditions have to be generated by the oxidation of other associated sulfides before antimony can be leached from stibnite (Boyle and Dass, 1971).
Sulphide Leaching
Most sulphides are oxidized to sulphate. From the sulphated ore, all of the zinc, copper and iron can be leached with water while lead, silver, gold and antimony will remain in the insoluble residue. Leaching of an Arsenical Copper Sulfide Concentrate
METHODS FOR PROCESSING OF ANTIMONY …
Methods of reducing melting and sulfide-alkaline leaching of antimony sulfide concentrates to obtain metallic antimony and antimony xide are discussed, and methods of refining …
Kinetics of the Leaching of Antimony Oxide Ore in Aqueous …
The kinetics of the leaching of antimony oxide ore (Sb2O4) in aqueous hydrochloric acid solutions has been investigated. This dissolution reaction is a heterogeneous solid-liquid …
Volatilization of Arsenic and Antimony from Tennantite/Tetrahedrite Ore
Using this treated antimony oxide powder in the traditional antimony smelting process, the formation of arsenic-alkali residue and antimony loss can be decreased to a great extent. Read more Article
Process Flow-Sheet for Gold and Antimony Recovery from Stibnite
Veglio and co-worker have optimized parameters for alkaline leaching with sodium hydroxide and sodium sulfide using pure antimony sulfide instead of antimony ore and have obtained 98% - ...
A fundamental study of the alkaline sulfide leaching of …
In the present paper, a kinetic study of gold leaching in alkaline sulfide solutions is presented. For the gold leaching system, both a complexing lixiviant and an oxidant are required to effect …
PGM extraction from oxidized ores using flotation and leaching
Direct leaching of oxidic PGM ore using different acids yielded relatively low PGM extractions. Leaching in hydrochloric acid achieved extractions of 36.6% Pt and 8.8% Pd, nitric acid achieved ...
METALLURGY
Volatilization Roasting is the process of volatilizing the sulfur and forming antimony crude oxide (Sb2O3) Sb2S3 +9O→Sb2O3+3 SO2; begins at 290°, rapid at 520° and finishes at 560° (Saito); begins at 290°, if the size of the grain is 0·1 mm. in diameter, at 343° of 0·1 to 0·2 mm., and 430° if 0·2 mm. (Friedrich); commences at 190 ...
Leaching kinetics and predictive models for elements extraction …
Results of dissolution studies showed that the copper oxide ore leaching in H 2 SO 4 solution increase with increasing time, pH, stirring speed and temperature at fixed H 2 SO 4 concentration of 0.77 M. The study showed that 97.02%, 85.41% and 39.64% of copper, cobalt and iron were, respectively, leached by H 2 SO 4 at 70 °C, pH value 1 within ...