stibnite roasting process

Reference

Is roasting a surface reaction?

Stibnite - an overview | ScienceDirect Topics

A two-stage roasting process, similar to that used for arsenic sulfide ores, can also volatilize antimony oxides and prevent adverse reactions such as the production of metallic antimony, which can coat the surface of gold particles (Nagy et al., 1966) or the formation of silver glasses in high-silver ores (Matsukawa and Sakai, 1956).

Basic research on the microwave absorbing properties and ...

Thermodynamic behavior of stibnite concentrate indicate that the microwave heating process in air has four stages and the roasting process appears at the third stage (321.3 °C-595.8 °C) with corresponding phase changes as Sb 2 S 3 → Sb 2 O 3 → Sb 2 O 5 → Sb 2 O 4.

First stibnite reacts with oxygen in a process called ...

First, stibnite reacts with oxygen in a process called roasting, which forms antimony(IV) oxide, Sb 2 O 4, and sulfur dioxide. The antimony(IV) oxide is then reacted with carbon to displace solid anti-mony from the compound. (a) Predict the products of the first method of extrac-tion. Write a balanced chemical equation to repre-sent the

RECOVERING MERCURY FROM CINNABAR-STIBNITE ORE BY FLOTATION ...

atmosphere was necessary for selective roasting of cinnabar-stibnite concentrate, a 4-inch fluidized-bed reactor was chosen for this phase of the investigation. Optimum results were obtained by roasting the concentrate at 485° to 490° C. in a fluidizing gas so composed that about 9 percent oxygen remained after reaction, Mercury recov-

USAC Metallurgy - us antimony

It is carried out between 550 and 600 degrees C. If the temperature is lower, the recovery is poor. If the temperature is any higher, the stibnite volatilizes into oxide. This method is used to upgrade low-grade ores. The ore is placed on a grate, and the stibnite melts out of the ore and through the grate to collect in pans.

ROASTING OF SULFIDE MINERALS - Wiley Online Library

to be the conversion of sulfide concentrates into oxides by dead roasting [1–3], whichcanbeeasilyreducedwithcarbon(productionofleadandzinc)orintomixed oxide and sulfate by partial roasting and sintering, which can be dissolved in dilute sulfuric acid and the resultant solution issubjected to electrowinning (extraction of zinc).

stibnite roasting process - petrovandepas.nl

Stibnite Roasting Process. Ores and concentrates containing stibnite have also been treated by roasting. This is generally required if significant amounts of the gold are present in a truly refractory form such as associated with arsenopyrite or as aurostibite. A two-stage roasting process, ...

stibnite roasting process - restaurant-lerabutin.fr

Stibnite Roasting Process. Stibnite an overview ScienceDirect Topics A two-stage roasting process similar to that used for arsenic sulfide ores can also volatilize antimony oxides and prevent adverse reactions such as the production of metallic antimony which can coat the surface of gold particles Nagy et al 1966 or the formation of silver glasses in high-silver ores Matsukawa and Sakai 1956...

The Behavior of Stibnite in an Oxidizing Roast - OneMine

THE leading antimony mineral is stibnite. In smelting stibnite ore two processes are available, precipitation and roasting-reduction. The former is suited only for high-grade ores. As low-grade ores are more common than high-grade, roasting-reduction is of greater importance than precipitation.