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1. Introduction. Molybdenite, the principal mineral containing molybdenum, is closely associated with copper sulfides (Hirajima et al., 2014).The recovery of molybdenite from copper ores is usually achieved by bulk flotation to obtain a copper-molybdenum concentrate, followed by molybdenite flotation against copper sulfides in the presence …Web
The secondary copper sulphide mineral, chalcocite, is the second most important copper mineral and its flotation is significantly affected by the surface oxidation.Web
Copper depressant NaSH is used to separate copper from the concentrate stream of an ore by depressing ... molybdenum flotation and copper depression take place simultaneously. As well, NaSH is an effective reagent to separate copper traces from nickel concentrates. Our sulfur products are used as basic building blocks and processingWeb
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are …Web
Mineral carrying rates across the pulp-froth interface in the range of 1.4-3.2 tph/m 2 and bubble surface coverage between 7 and 22 %, have been determined in large rougher flotation cells (100 ...Web
In this paper, we have reviewed the surface properties of common copper oxide minerals and summarized application of direct flotation, sulfidization flotation, and …Web
Molybdenum is an important alloy element for metallurgical industry because of its high temperature stability. As the major mineral reserve for molybdenum, molybdenite (MoS 2) is commonly found in porphyry copper deposits.Molybdenite is naturally floatable and can be separated from copper sulfide mineral using froth flotation.Properties of …Web
Copper was present in the ore mainly as malachite. Some chrysocolla and pseudomalachite with traces of sulphide minerals (chalcopyrite, chalcosine, bornite) were also present. Cobalt was. Comparison of sodium hydrosulphide with ammonium sulphide as sulphidisers. The reagents NaSH and (NH 4) 2 S were compared in regard to the …Web
... Assuming that oxides are only recovered during the oxide flotation stage, Cu-oxide minerals recovery can be estimated at around 52%. That constitutes an …Web
Nouryon's mining solutions focus on the flotation of calcite, iron ore, potash, phosphate and apatite, as well as additional mineral processing applications. Markets Markets All ... NaSH is an efficient copper depressant and sulfidizing agent enhancing sulfide flotation performance for mining applications.Web
primary and secondary copper sulfides, iron as pyrite and chalcopyrite, and to a partial extent lead as galena, in primary and by-product molybdenite flotation circuits. Highlights A customer faced daunting obstacles in safe and efficient molybdenum concentrate production through use of the historical depressant reagent sodium hydrosulfide (NaSH).Web
4.1 Flotation. Figures 1 and 2 present lab scale batch flotation results from two separate studies, focusing on graphite and copper-activated pyrite, respectively. In Fig. 1, the baseline graphite recovery where no starch is used yields a recovery of 93.9 ± 0.5%.This decreases slightly to 82.3 ± 4.3% for NWS dosed at the lowest depressant …Web
A flotation feed that assayed 2.7% copper produced a concentrate that assayed about 23.5% copper at a recovery of 91.5% was obtained after only one roughing and one cleaning stage (Seifelnasr et ...Web
I suppose you are trying to sulphidize the copper for flotation. OK, this depends. You need to test to know. It could be 500 to 2000 g/t NaHS. Try and you will see how sulphidizing …Web
Depressants are used in flotation systems in the minerals processing industry to make or keep certain minerals selectively hydrophilic. They may be inorganic and include, for example, sodium hydrosulfide (NaSH) which is the chemical of choice for depressing sulfide minerals, particularly those containing copper, iron and lead .Web
The sulfidation xanthate flotation method is commonly used to recover copper from oxidized copper minerals Kalichini et al., 2017;Lee et al., 2009;Marion et al., 2017;Zhou and Chander, 1993).Web
It is though that the loss in performances undergone by the flotation process might result from the depressing effect from the excess NaSH introduced in the pulp on malachite and heterogenite ...Web
Silver tends to concentrate with copper and lead sulfides. AEROFLOAT® and AEROPHINE® silver flotation reagents are widely used to optimize silver recovery from concentrates. Our reagents for mineral processing are used extensively for the recovery of precious and base metals, including gold, copper, molybdenum, nickel and cobalt, …Web
Continuing with the evaluation of copper oxide flotation using hydroxamate we now evaluate a rock that's 41% copper oxide with some lead ... (at-500 to -600 mV vs. a combination Sulfide Ion Electrode) using sodium sulfide (Na2S), sodium hydrosulfide (NaSH), or ammonium sulfide ((NH4)2S) followed by flotation using xanthate or other …Web
Case study one: a complex copper, lead and zinc flotation circuit (the Hellyer Project) The Hellyer Project was developed by Aberfoyle Limited and proceeded from discovery in 1983 to production in 6 years.1 The 156 106 t orebody consisted of Þne grained massive sulphide containing copper, lead, zinc and silver minerals with gold in a ...Web
safer technology for nash replacement in molybdenum flotation FLOTICOR™ DP sulfide depressants are a safer solution to replace NaSH in copper and molybdenum separation. This new technology is proven in commercial production of molybdenum concentrate, and it will allow you to eliminate the risk of H 2 S exposure while maintaining your ...Web
The present paper summarizes the utilization of copper as a clean energy mineral and its importance in the current renewable energy sector. Extensive research has been carried out on the flotation of …Web
To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN; Use Add New Topic to ask a New Question/Discussion about Flotation.; OR Select a Topic that Interests you.; Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.; Use …Web
Otherwise, the sulfidation flotation requires agents (like NaSH, Na2S, and H2S) that can sulfur the copper oxides, altering its surface chemistry by forming species of "synthetic covellite" (see Eq. (1)). This procedure is the most employed for flotation of copper oxides (Yin et al., 2019), but the concerns arise in controlling the pulp's ...Web
Flotation response for copper oxide composite using AM28 as the copper collector. Total AM28 and MIBC doses for both Tests A and B were 1200 g/t and 50 g/t, respectively. Download : Download full-size image; Fig. 5. Copper grade–recovery relationship from the rougher scavenger flotation test for the copper oxide composite.Web
Being pyrite (iron sulphide) the main gangue mineral associated with copper sulphides, it is of the main interest to study conditions to obtain selective depression of pyrite. In the case of Cu–Mo flotation plants, inorganic depressant reagents are commonly used, such as cyanide, Na 2 S, NaSH or some sulphites. The main drawbacks in using ...Web
According to the characteristics of the ore, the innovative process of flash copper flotation in weak acidic pulp and lead flotation, followed by further copper recovery, was developed. The closed-circuit test shows that copper concentrate assays Cu 16.33%, Pb 7.98%, Ag 242 g/t at Cu recovery of 86.67%; lead concentrate contains Pb …Web
The role of NaHS and Na 2 S in depressing copper sulfides in flotation is associated with the desorption of thiol collectors and the modification of copper mineral …Web
Recovery of copper in concentrates from slags cooled in the induction furnace and ground for 30 minutes ranged from 87.1 to 96.2 percent with the best recovery obtained on the highest grade slag sample. Copper content of the flotation tailings, which is the most important indicator, ranged from 0.26 to 0.39 percent.Web
Can be used over a wide pH range. FLOTICOR™ DP sulfide depressants, a safer solution to replace NaSH for molybdenum flotation, are part of our portfolio of flotation reagents for sulfide ores. To meet your mineral processing needs, we offer a wide range of products, including tailor-made collectors, xanthate-replacement collectors, and frothers.Web
Republic of Congo (DRC) from ores containing copper-cobalt oxides or copper-cobalt sulphides. Where oxide and sulphide cobalt-bearing copper minerals occur together, efficient recovery of copper and cobalt is known to be extremely difficult. This study investigates the flotation behaviour of a mixed oxide-sulphide ore where copper isWeb
Flowsheet for treatment of Copper Sulfide ores rich inminerals such as chalcopyrite with gold and silver as well as arsenopyrite. The above flowsheet is designed for the treatment by flotation of …Web
In this paper, the surface properties of copper oxide minerals and their effects on the mineral flotation behavior are systematically summarized. The flotation methods …Web
