sulfide ore systematically

In response to the environment and economic problems attributed to the usage of large amount of lime and sulfuric acid in high alkaline preferential process (HAPP), this research systematically investigated a new, environment friendly and cost-effective flotation approach for the selective separation of galena, sphalerite, and pyrite from a …

Such inclusions are systematically associated with small (<10 μm), irregularly shaped sulfide melt inclusions. ... Assuming a Cu content similar to those in melt inclusions from volcanic rocks prior to sulfide saturation, >95% of the ore metals are extracted from the surrounding silicate melt by the sulfides. Concentrations of a few …

Metal sulfides are the most important group of ore minerals. Here, we review what is known about their compositions, crystal …

Abstract. Tailings generated during processing of sulfide ores represent a substantial risk to water resources. The oxidation of sulfide minerals within tailings …

To asses this, we systematically compared metal tenors (Ni, Cu, and the PGE) of ores from two perspectives — i) different ore types in each segment and ii) a single ore type across all four ...

The sulfide mineralogy varies systematically with sulfide mode and grade. In BSD59, there is a systematic change in sulfide mode and mineral assemblage from top to bottom of the ore-zone, corresponding to a gradual increase in sulfide mode from less than 1% to 25–35%.

Sulfation roasting, a common activation technique, is a potential method for cleaner production of nickel from complex low-grade ores. In this study, nickel oxide–sulfide mixed ore concentrate ...

sulfide ore resources only account for 28% of the global nickel resources. With the long-term development and utilization, the global nickel sulfide ore reserves keep declining and the resource endowment is declining day by day. Especially in the recent 20 years, there has been no large-scale nickel sulfide mine exploration and development

This study aims to optimize the traditional flotation process of Mo–Bi sulfide ore by using the difference in natural floatability of minerals for cleaner production. Single-mineral flotation ...

The enhancement mechanism of adapted adsorption behavior in the bioleaching of copper-bearing sulfide ore by Acidithiobacillus sp. was systematically investigated from a mineralogical viewpoint and compared to adsorption-deficient (DF) and adsorption-unadapted (UA) systems. With the assistance of the adapted adsorption …

A smelting workaround. The traditional route for extracting copper from sulfide ores is smelting. Yet there is a growing case for leaching sulfides from lower grade ore bodies and especially for those …

The metamorphosed Boliden volcanic-hosted massive sulfide (VHMS) ore deposit, northern Sweden, is characterized by an abundance of massive arsenopyrite ore and unusually high gold enrichments (up to 300–600 g/t) in crosscutting veins and fracture zones. ... (30–50 ppm on average) and systematically decrease to 0–2.7 ppm with …

Currently, the sulfide ore are the predominant raw materials for refining extract nickel metal 1,2,3. Unfortunately, the grades of sulfide ores are falling as the higher grade reserves are ...

Sulfide self-heating can make working conditions dangerous as oxygen levels can be depleted and significant quantities of sulfur dioxide (SO 2) released (Ninteman, 1978). If uncontrolled, ignition can occur, which is particularly difficult to contain. Mount Isa Mines Ltd. (Australia) has seen cases of spontaneous combustion of sulfides ...

1. Introduction. Bioleaching technology refers to the use of acidophilic microbial oxidation to convert metals contained in minerals, such as sulfide ore, into free metal ions (Brierley and Brierley, 2001).Due to its low operational costs, mild reaction conditions and low environmental impact, this process has been widely used for metal …

the use of reagents in the flotation of slime-containing sulfide ores. 2. Materials and methods 2.1. Materials Samples of copper sulfide, with a copper grade of 0.36%, was procured from the Zijinshan Copper Sulfide Mine in Fujian Province, China. The chemical compositions of the ore samples are listed in Table 1.

13.8.1 Introduction. Magmatic ore deposits are masses of igneous rock enriched in useful chemical elements to such an extent that it is feasible to mine them at a profit. To be considered an ore, an accumula-tion of an element must combine high grade with large ton-nage and must be accessible to mining operations.

In this paper, the effect of the depressant fenugreek gum (FGM) on the flotation of a copper-nickel sulphide ore which contains talc was systematically investigated through micro-flotation, bench ...

Most magmatic Ni-Cu sulphide ore deposits are characterised by sulphide amounts in large excess over proportions expected for a magma crystallizing along its …

In order to enhance the "contact mechanism" governing the interaction of extracellular polymeric substances (EPS) with low-grade copper-bearing sulfide ore for the bioleaching of copper, moderately thermophilic Acidithiobacillus caldus was subjected to exogenous intervention with iron and sulfur.The enhancement of the contact mechanism …

To elucidate the process mechanism of self-generation of thiosulfate from refractory sulfide gold ore at atmospheric pressure, this section systematically …

The traditional high alkaline process (HAP) always encounters challenges in handling pyrrhotite-rich type copper sulfide ore, especially the slow copper flotation rate and the unsatisfactory separation efficiency. In this study, HAP was optimized via pulp aeration and lime-aid grinding, and their beneficial effect was studied systematically.

Sulfide minerals are compounds in which sulfur is combined as an anion with a metal (or semi-metal) cation or cations. The definition is commonly widened to include minerals in which the anion is As or Sb, …

The Cu/Ni sulfide ore for bench-scale flotation was from the Yanbian Copper–nickel Mine. The results of chemical analysis of the ore are listed in Table 2.It showed that the main composition of the ore for bench-scale flotation is as follows: 27.81% MgO, 38.91% SiO 2, 12.38% Fe 2 O 3 and 6.02% CaO, which only contained 0.20% Cu, …

Cinnabar, mercury sulfide (HgS), is the principal ore of mercury. (more below) Cinnabar is very dense, 8.1 times as dense as water, has a distinctive red streak and has hardness 2.5, barely scratchable by the fingernail. There are very few minerals that might be confused with cinnabar, but realgar is softer and cuprite is harder.

Research on magmatic sulphide ore genesis mainly focuses on sulphide melt-silicate melt equilibria. ... these structures are systematically associated with sulphide minerals suggesting they ...

PDF | On Jan 1, 2020, Changtao Wang and others published A New Innovative Method of Flotation Separation for High Sulfur Lead–Zinc Sulfide Ore | Find, read and cite all the research you need on ...

Sulphide ores that are mined for nickel and cobalt typically contain 1.5%–3% Ni and 0.05%–0.1% Co. Concentration, Smelting and Converting to Matte The sulphide ores …

Sulfide ore deposits formed directly from magmatic sources, ... Graybody materials exhibit systematically low emissivity across their spectrum. This characteristic violates the key assumption of ...

A smelting workaround. The traditional route for extracting copper from sulfide ores is smelting. Yet there is a growing case for leaching sulfides from lower grade ore bodies and especially for those ore bodies containing problematic elements like arsenic, which make smelting less economical. Smelting is increasingly expensive …

Sulfide phase relations in the system Fe-Ni-Cu-S have been widely studied for the understanding of ore deposit formation (Craig & Kullerud 1969, Naldrett 1969, Fleet & Pan 1994, Ebel & Naldrett ...

Many approaches were pursued to solve the "sulfide problem" at Broken Hill before selective flotation was developed. The successful technology involves first crushing the ore, typically to a particle size of about 5 to 50 micrometers, to liberate separate grains of the various valuable minerals and worthless gangue components.Then the particles are …

Currently, ore deposits are differentiated as types that are haphazardly, not systematically, named and do not follow a logical system. Deposit types of gold, for example, in order of decreasing endowment and overall economic importance, comprise the following: ... Sulphide ore atop a chimney is characterized by high concentrations of Au …

This study aimed to reveal the specific mechanism of extracellular polymeric substances (EPS) in the bioleaching of copper-bearing sulfide ore by moderately thermophilic bacterium Acidithiobacillus caldus. The bioleaching performance of blank control (BC), planktonic cell deficient (PD), attached cell deficient (AD), and EPS …

Archean country rock sulfides and associated komatiite-hosted sulfide ore at Kambalda (Western Australia) have been systematically investigated with respect to their Δ 33 S signatures. The sedimentary sulfides exhibit a large variation from − 0.1 to + 2.4‰ independent of their stratigraphic position or type of host rock.

Abstract Sulfide and sulfate ore samples collected from the Hakurei deposit of the Bayonnaise knoll were examined for the occurrence and chemical composition of minerals, ... S value) of sulfide and sulfate minerals. Note that δ 34 S values of anhydrite are systematically heavier than that of aqueous sulfate in seawater. Table 2.