o Roasting - sulfides o Dehydration, CO2 removal - fine grained materials o Calcination - limestone, ... o Pre-reduction of Mn ore fines. (magbuto buto ang furnace kung ideretso ang oxides) o Roasting and prereduction of ilmenite o Roasting and pyrolysis of Au bearing pyrite. Shaft furnace.
New to the forum, thank you for you help. I have high sulfide ore from Colorado, I roasted my cons for 3hrs, I ran a magnet thru the cons, I mixed 40g of my ore with 120g of standard flux from Action Mining. Heated my oven to 1900 degrees, let it there for 30 minutes. Than poured it into a cone...
Table 5 presents the compositions of generated sulfides analyzed by EPMA. Sulfide 1 is from the thermal treatment products of mixture 1, ... Smelting of nickel sulfide concentrates by roasting and electric furnace smelting. Extr. Metall. Nickel, Cobalt Platin. Gr. Met., Elsevier (2011), pp. 199-214, 10.1016/B978-0-08-096809-4.10017-6.
DE630223C - Process for roasting pyrite or other iron sulfides - Google Patents Process for roasting pyrite or other iron sulfides Info ... furnace gases cooled roasting air Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no ...
Journal Article: Modeling the roasting of sulfides in industrial fluidized-bed furnaces
Fluidized roasting in a boiling furnace is a good way to use residual oil and carbon to provide heat for roasting while oxidizing the metal sulfides in the spent HDS catalyst. This study used computational fluid dynamics (CFD) coupled with the Coarse-Graining model (CGM) to simulate the fluidized roasting effect of HDS catalysts at …
ROASTING OF SULFIDE MINERALS In addition to common metals like copper, lead, zinc, and nickel a number of other metals such as antimony, bismuth, cadmium, cobalt, mercury, and molybdenum occur as sulfide minerals. Sulfides are not reduced with the most …
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. This chapter also attempts to demonstrate as to how the predominance area diagrams of Cu-S-O and Fe-S-O systems were used in the past for …
In the oxidizing roasting of flotation concentrates, the sulfides are oxidized and converted into. a porous, well-permeable cyanide solution, a mass of oxides. The …
Compared to the traditional pyrometallurgical process, sulfation roasting consumes lower energy, but the application of sulfur triggers aggressive corrosion of the furnace due to the release of SO2 and SO3. Hence, it is still a challenge to implement sulfation roasting technologies at industrial level.
A method for roasting sulphide ores or ore concentrates containing precious metals is practiced in a furnace, typically in a fluidized bed. The ore and a sulphur-binding lime-containing material are supplied to a roasting furnace in which the ore is roasted with the emission of heat and sulphur dioxide. The lime-containing material--such as calcium …
Schematic diagram of electric roasting furnace setup. Table 2. L 9 orthogonal array of roasting tests and the results of sulfide conversion (particle size 270–325 mesh) Test no. ... A closer study of such behavior is necessary in order to prevent accretion problems in roasting of such sulfides. 4.
After blank roasting, metal sulfides are oxidized to metal oxides, and the inside of the spent HDCs become loose and porous ... On the one hand, boiling furnace roasting can use the residual carbon in the spent HDCs, reducing the consumption of natural gas and other fuels. On the other hand, fluid roasting has a fuller gas-solid contact to ...
The sulfation roasting using iron sulfates have some advantages over gaseous sulfation such as lack of binders due to the binding property of iron sulfates [94,95,96], the possibility of the application of conventional metallurgical furnaces for the roasting. Our study has shown that there is no difference in the mechanism of the both …
Three series of experiments on oxidizing roasting of sulfide polymetallic concentrates in a laboratory fluidized bed furnace are performed to develop an economically efficient technology of processing the sulfide polymetallic ore concentrate of the Artem'evsk deposit (Kazakhstan). The composition of the initial concentrate and the …
homogeneous material distribution over the full furnace area. The roasting process is autothermal. The sulfides in the feed serve as fuel and as reagent to form sulfates. The …
In the reduction roasting procedure, all the sulfates including CaSO 4, SrSO 4, and Ca 0.7 Sr 0.3 SO 4 are reduced to soluble sulfides. Meanwhile, most MnO 2 is converted to a low-valence Mn product ... Then the mixed sample was roasted in a tubular furnace under a nitrogen atmosphere. The effects of roasting temperature, carbon …
Two-stage oxidation-sulfation roasting of nickel sulfide concentrate in fluidized bed was investigated to generate water-soluble metal sulfates as an alternative process to smelting of the sulfide concentrate for the recovery of valuable metals. The first stage, i.e., oxidation roasting, was employed to preferentially oxidize the iron before …
A method of roasting sulfides, which comprises feeding the sulfides into and throu h a furnace, feeding air for oxidation into t e furnace in advance of the point at which the sulfides are introduced and causing a portion of the hot gases to travel counter currently to carry heat to the introduced sulfids and causing-the remainder of the gases ...
C22B5/16 — Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced. Y ... Treatment of metal sulphide concentrates by roasting and arc furnace smelt reduction Publications (1) Publication Number Publication Date; DE60000574D1 true DE60000574D1 (en) :
Oxidation roasting needs high roasting temperature and copper will suffer a loss by generating copper ferrite. The exhaust gas (SO2, Cl2, HCl) from the furnace in chlorination roasting process is a threat to the environment. In roasting, copper was mainly formed to soluble sulfate by water or dilute acid after roasting.
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.
The roasting experiments carried out in a horizontal electric tube furnace under an oxygen atmosphere shows that up to 96% Cu can be recovered from the chalcopyrite by salt roasting with KCl and ...
By contrast, sulfidation roasting is a more commercially feasible process to obtain metal sulfides with sufficient particle size and good crystalline structure 31, because high temperature favors ...
The sulfation roasting using iron sulfates have some advantages over gaseous sulfation such as lack of binders due to the binding property of iron sulfates [94,95,96], the possibility of the application of conventional metallurgical furnaces for the roasting. Our study has shown that there is no difference in the mechanism of the both …
The roasted calcine and the furnaces. The roasted calcine withdrawn from the furnaces is collected in specially designed trucks. These act as cooling and storage bins, as well as a means of …
The chemistry of sulfide roasting is complex involving numerous reactions. Roasting of sulfides, in general, is exothermic and hence the temperature of the ore …
6. PROCESSES There are several different types of roast, each one intended to produce a specific reaction and to yield a roasted product (or calcine) suitable for the particular processing operation to follow. The roasting procedures are: Oxidizing roasts - which remove all or part of the sulfur from sulfide metal compounds, replacing the …
In the Yunfu plant, raw materials are crushed (grain size <3–4 mm) before roasting in the fluidized-bed furnace ... Trace elements extracted in this step include trace elements bound to sulfides and organic matter. In this study, trace elements released in this step are mainly derived from the sulfide-associated fraction because of the ...
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 …
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