-
- دوشنبه تا شنبه: 10:00 - 16:00 / یکشنبه تعطیل است
A method for fire refining of rough antimony in an induction furnace was also developed. Here, the extraction of antimony into refined product comprises 84.2% with 11.3, 2.52, and ≈ 2% of antimony concentrated in the phosphate slag, the slag after …
به خواندن ادامه دهید
The process of refining gold requires reactions among chemical compounds, and the key to the refining process is a highly corrosive liquid called aqua regia. This combination of acids is integral to the extraction …
به خواندن ادامه دهید
An industrial scale two meters long with 17 cm diameter (outer tube) horizontal zone refining equipment, provided with a single inductive heater (W 5 cm) and capable of generating up to 45 kW with 10 kHz maximum frequency was established for this work.The pieces of Sb were charged in a high purity quartz crucible boat (L 60 cm × W 5 cm), …
به خواندن ادامه دهید
At the end, available refining methods for removal of the most important impurities including arsenic, sulfur, lead, iron, and copper from crude antimony are …
به خواندن ادامه دهید
Abstract Antimony- and bismuth-rich copper anodes, anode slimes and decopperized anode slimes from industrial copper electrorefineries were studied mineralogically. Antimony in the anodes occurs mainly as Cu-Pb-As-Sb-Bi oxide inclusions along the copper grain boundaries; bismuth is mainly present as Cu-Pb-As-Sb-Bi oxide, …
به خواندن ادامه دهید
1. Background. Antimony is a silvery, white, brittle, crystalline solid that exhibits poor conductivity of electricity and heat. It has an atomic number of 51, an atomic weight of 122 and a density of 6.697 kg/m 3 at 26 °C. Antimony metal, also known as 'regulus', melts at 630 °C and boils at 1380 °C.Antimony and the natural sulfide of …
به خواندن ادامه دهید
Without the sophisticated melt refining and purification process, these oxide inclusions will be retained in the aluminum melt, inducing many troubles and leading to the deterioration of mechanical properties, ... Initially, the liquation method was used to extract antimony minerals from ore. It should be noted that liquation-based techniques ...
به خواندن ادامه دهید
Andreas Siegmund. Jean-Pierre Cloutier. Abstract and Figures. Antimony is classified as a critical/strategic metal. Its primary production is predominated by China via …
به خواندن ادامه دهید
Refining using Sulphide of Antimony. This process is also some centuries old, and is based on the fact that when gold-silver alloys are melted with sulphide of antimony sulphide of silver will form, and the gold will alloy with the antimony. Au + 6Ag + Sb2S3 = Au + 2Sb + 3Ag 2S. Copper and other metals will also be removed by this …
به خواندن ادامه دهید
Electrolytic refining of antimony is mostly realized by electrolysis of solution, where hydrofluoric acid and sulfuric acid solutions are used as electrolyte to generate …
به خواندن ادامه دهید
Gold Smelting & Refining Process. Gold can be concentrated and recovered by applying different gold refining process methods and the final product has variable quality. In this way, it is necessary to have a better marketable product so that the incomes can be improved. Then, we have two smelt and cast the gold into bars called …
به خواندن ادامه دهید
Antimony (Sb) is an impurity element that is increasingly encountered in the mineral processing/metallurgical industries of gold, copper and lead. Its occurrence in …
به خواندن ادامه دهید
Antimony has been highlighted as a critical raw material in the EU owing to its economic significance and high supply risk. Due to the dispersed uses and low …
به خواندن ادامه دهید
It was discovered that antimony removal also increased with a decrease in distillation pressure, and an increase in distillation time, and temperature. At 5 Pa, 700°C, and 90 minutes, 38.6 % antimony was removed, and its content was decreased from 3.5 wt.% to 2.2 wt. %. It is noted however, that antimony removal required
به خواندن ادامه دهید
An electrolytic refining process is used in order to obtain antimony with an overall impurity content not above 0.1–0.3%. In this this case the complete scheme for comprehensive treatment of antimony raw material includes: flame refining of ferrous metal electrolysis in solutions, solution purification from accumulated impurities, and anode …
به خواندن ادامه دهید
The main purpose of this study was to separate lead from crude antimony through an oxidation pyro-refining process and by using sodium metaphosphate as a lead elimination reagent. The process parameters that will affect the refining results were optimized experimentally under controlled conditions, such as the sodium metaphosphate …
به خواندن ادامه دهید
Antimony is a strategic critical mineral that is used in all manner of military applications, including the manufacture of armor piercing bullets, night vision goggles, infrared sensors, precision ...
به خواندن ادامه دهید
The products, refined copper and refinery-slag, together contain quantities of arsenic, antimony and bismuth equal to those present in the blister-copper subjected to the operation. In the tables on p. 663 the products of refining are calculated from the working-results on 100 tons of blister-copper.
به خواندن ادامه دهید
Copper electro-refining. 1. Introduction. In recent years, antimony production has grown steadily, mainly linked to its use in flame-retardant compounds. Over 50% of …
به خواندن ادامه دهید
The Harris process for lead softening uses sodium hydroxide and sodium nitrate to remove arsenic, tin, and antimony from molten lead by oxidation. It is known to be better than oxygen softening; however, the process has a higher cost in terms of the reagents used. Sodium hydroxide is corrosive and expensive. In this research, calcium …
به خواندن ادامه دهید
Refining and alloying operating temperatures range from 320 to 700°C (600 to 1300°F). Alloying furnaces simply melt and mix ingots of lead and alloy materials. Antimony, tin, arsenic, copper, and nickel are the most common alloying materials. Refining furnaces are used to either remove copper and antimony for soft lead production, or
به خواندن ادامه دهید
Meanwhile, the antimony was separated into the leaching residue, in which the content of antimony reached 31.32%. Thereafter, the leachate was purified by sulfide precipitation with Na 2 S. The purified solution was then subjected to an evaporating and crystallizing process for the preparation of Na 2 SnO 3 ·3H 2 O.
به خواندن ادامه دهید
Antimony is a silvery-white metal that is found in the earth's crust. Antimony ores are mined and then mixed with other metals to form antimony alloys or combined with oxygen to form antimony oxide. Little antimony is currently mined in the United States. It is brought into this country from other countries for processing. However, there are companies in the …
به خواندن ادامه دهید
Antimony is a little-known metalloid commonly used in lead-acid batteries and fire retardants, and while deposits are found worldwide, China's large resource, low cost of production and significant processing capacity has seen the country dominate market supply. ... which dominates mining and refining, especially as the ongoing trade war ...
به خواندن ادامه دهید
process, and charcoal provided a re ducing atmosphere. Soda ash was also the conventional fluxing agent in this route. In recent times, the primary ex tractive processes for most of the mar ket-available bismuth are the electro refining process for lead (the Betts pro cess) and the pyrorefining process for
به خواندن ادامه دهید
Vacuum distillation process uses the differences in the volatile properties of various metals in crude tin in vacuum and high temperature, to efficiently remove the impurities such as lead, bismuth, antimony, and arsenic. This process is an important approach for pyrometallurgical refining of crude tin (Fig. 2).
به خواندن ادامه دهید
Antimony has a range of industrial uses in batteries, chemicals, ceramics and glass but by far the most important is in fire retardants. The economically most important ore mineral and principal source for the production of antimony is stibnite. Majority of antimony-bearing ore deposits are associated with the subduction-related western …
به خواندن ادامه دهید
This article provides an overview of methods for processing antimony-containing mineral and technogenic raw materials, as well as methods for refining rough antimony, which …
به خواندن ادامه دهید
An improved process for refining lead bullion containing antimony, in which the bullion is initially heated in a refining vessel to about 25° F. (14° C.) above the bullion melting point, and is thereafter kept molten primarily by exothermic process reactions. The process includes the steps of melting the lead-antimony bullion, agitating the bullion, adding …
به خواندن ادامه دهید
These metals actions, therefore, become challenging in petroleum refining relying on the RFCC process and so, negatively impact the refining cost. ... During the impregnation process of antimony compounds on the FCC catalyst, the drying temperature has been established to range between 100 and 204 °C for 1 h, calcination temperature …
به خواندن ادامه دهید