0086-21-58386256
Dec 01, 2009· In some experiments, sand was replaced by flotation tailings. The results showed that mixtures containing 10% of waste with 15.0–37.5% water by mass gave cemented materials with unconfined compressive strength (UCS) in the range 0.4–3.0 MPa after 28 days of hardening, this range encompassing typical paste-fill and CLSM formulations.
Cohesive strength, MPa 10.24 12.91 15.59 1.37 * The minimum and maximum value were taken at 95% confidence interval . Table 2. Rock mass properties for the massive sulphide ore (Swan, 2010) Properties Material values Bulk modulus, (GPa) 7.68 Shear modulus, (GPa) 6.50 Cohesion, (MPa) 5.11 Density, (kg/m3) 4030 Tensile strength, (MPa) 1.86
magmatic sulfide deposits where the principal ore mineral is pentlandite [(Ni,Fe) 9 S 8]. The ionic radius of divalent nickel is close to that of divalent iron and magnesium, allowing the three elements to substitute for one another in the crystal lattices of some silicates and oxides. Nickel sulfide deposits are generally associated with iron ...
gold ore compressive hardness The impact crusher is the European tech hydraulic type easy to operate and highcapacity. Performance. 1. Hammer is made of high chrome; crushers for crushing all kindsof minerals and rocks with compressive strength less than iron ore Copper Ore Gold
History of Sulphide ore flotation dates back to beginning of 20th century. Sulphide ores are major sources of base metals like Copper, Lead, Zinc, Nickel, Cobalt etc. Beneficiation of these base metal sulphide minerals is predominating through froth flotation technique. This technology has acclaimed importance as a versatile process for
Dec 24, 2008· 10%· The lower the ore grade, the lower the damage initiation stress threshold. In the host rocks, the damage was initiated at about 0.3–0.4 of the uniaxial compressive strength. Hence, the application of Eq. 3 to sulphide ores will over predict damage in stope walls in sulphide.
Compressive strength as a concrete property depends on several factors related to the quality of used materials mix design and quality control during concrete production. Depending on the applied code the test sample may be cylinder 15 cm x 30 cm is common or …
Currently, the plant processes oxide ore, tailings and leachable sulphide ore. Progressing to a stage of sulphide ore process capability in a timely manner is now of the utmost concern. The Feasibility Study for the Selinsing Gold Sulphide Project was released in February 2019 and describes adding flotation and BIOX® processes to the current ...
This extreme size reduction ratio has been achieved on a bulk ore sample of massive sulphide ore from Rio Tinto, Spain, where an ore feed of 120 mm diameter has been reduced in a single pass to 94% with a diameter of less than 250 μm, thus representing an impressive reduction ratio of 480 Borg et al. (2015 a).
The main sulfide mineral associated with tin and the biggest matrix for tin ore. It is typically found in igneous and metamorphic rock formations. The old timers knew the significance of sphalerite as a potential gold indicator and called it "blackjack" or "rosin jack.". Sphalerite comes in a range of colors, including grey or greyish ...
Onaping is much more burst prone than the ore zones or hangingwall rocks. The footwall rock sequence (felsic gneisses, pink granites) is fine grained with relatively high unconfined compressive strengths (Table 1). Local variations in rockmass strength exist due to …
Low-temperature roasting followed by acidic bromine leaching yielded a platinum recovery of 85% from mixed oxide / sulphide ores in Zimbabwe (33). PGM sulphide concentrates with high chromite contents. PGM sulphide ore concentrates from South Africa are predominantly of two types: those from the Merensky reef, and those from the UG2 reef.
Apr 27, 2014· The Greyish sample had the highest compressive strength value of 56.74 MPa. Dielectric properties measurements were also conducted on the samples; and the results were temperature dependant. The water absorption by total immersion revealed that the blackish sandstone had the highest percentage of 6.62 %.
In Pergamon Materials Series, 1998. 10.6.6.1 Matte-slag-gas reactions in Cu-Fe-Ni sulphide ores. Sulphide ores are a major source of Cu, Ni and precious metals. A basic principle of the extraction processes is to blow air into the molten sulphide in order to oxidise (1) S, which forms a gas and (2) Fe, which forms predominantly FeO and then partitions to a slag phase which covers the matte.
The types of ore mainly comprise mono-copper sulphide with dense massive structure, and disseminated and veinlet ore (Yang et al. 2010). Pyrite and pyrrhotite minerals constitute more than 90% of the ore. ... compressive strength test (Figure 2) and Brazilian test (Figure 3) were conducted on the three typical rock
Refractory Ores Treatment of various types of refractory ores have been assessed including arsenopyrite, pyrite and copper sulphide ore. Roasting refractory sulphide ores can be roasted to produce a calcine amenable to cyanidation. A Dorr-Oliver pilot roasting unit is available to study the roasting of sulphide concentrates. Batch
and unconfined compressive strength > 200 MPa). Pyrrhotite, chalcopyrite and pentlandite account for the bulk of the sulphide ore (density ~ 4,000 kg/m 3 and UCS ~ 100 MPa). (a) (b) Figure 2 Production faces at Coleman. (a) Main orebody drill sill development under backfill with in-cycle shotcrete.
Pyrite, the most widespread and abundant of sulphide minerals in the Earth's surficial rocks, commonly constitutes the primary opaque phase in ore deposits. Consequently, an understanding of the behaviour of pyrite and its relationships with coexisting phases during the metamorphism of pyritebearing rocks is vital to the interpretation of their ...
Approximately 4,600 kg of sulphide ore samples were collected from across the Zod ore body to support the testwork program. The samples were classified by ore type, spatial ... compressive strength of 59 kN. The Bond Ball Mill work Index was 16.5 kWh/tand the Bond Rod Mill work index was 15.8 kWh/t. Modeling work by SMMC (Morrell, 2010 ...
Based on strength, Hucka and Das (1974) defined the rock brittleness index by employing the sample compressive strength and tensile strength; Altindag (2003) built the functional relation between ...
Approximately 4,600 kg of sulphide ore samples were collected from across the Zod ore body to support the testwork program. The samples were classified by ore type, spatial location and sample ... an abrasion index of 0.085 and an unconfined compressive strength of 59 kN. The Bond Ball Mill work Index was 16.5 kWh/tand the Bond Rod Mill work ...
The vast majority of sulphide ore-forming fluid spills on the ocean floor at ... The cohesive shear strength c is a function of the unconfined compressive strength (UCS) and the angle
Dec 31, 2018· Dear Colleagues, This Special Issue, "Massive Sulfide Deposits all around the World", intends to provide a worldwide reference on one of the most important sources of base (Cu, Pb, Zn) and precious (Au, Ag) metals. Massive sulfide deposits are commonly classified in two large categories, attending to the dominant processes during ore ...
The sulphide ore is oxidised at the outcrop, but remains unweathered at depths in excess of 20 m. ... In total, 27 triaxial compressive strength, 17 base friction angle on saw cut fractures (BFA) and 12 direct shear on open joint (SHJO) tests were carried out as part of the present study.
The copper slag is produced during the process of smelting for sulphide ore and collected as the material that floats on the top of the molten copper in a furnace. ... observed the highest compressive strength (3.5 MPa) at a high NaOH concentration (15 M) after curing for 28 days. However, further increasing the NaOH concentration led to poor ...
Two dissimilar materials one a sulphide and the other an oxide both of African origin, one of which is from a current production operation within RSA, the other from the DRC not currently commercially exploited are reported upon. 3.1.1. The sulphide sample. This is derived from the Black Mountain sulphide ore body currently exploited in the
Feb 01, 2004· The results from the evolution of the uniaxial compressive strength (UCS) and its relationship to the sulphide content are shown in Fig. 4. In addition to the effect of the binder type, which will be extensively demonstrated later in this paper, one can note that the amount of sulphides influences the strength (UCS) of the pastefill.
(2018) Purification of High-grade Calcite Ore by Flotation with Alkyl Diamines. Mining, Metallurgy & Exploration (MME). Javadi, Alireza; Kota, Hanumantha Rao. (2016) Complex sulphide ore flotation: Effect of depressants addition during grinding on H2O2 formation and its influence on flotation.