Gangue Physical Parameters

Gangue - Wikipedia

Gangue minerals, once separated by mineral dressing processes of (most of) the valuable ore minerals and dumped in mine tailings may be a significant environmental impact. In particular, oxidation of pyrite, a common gangue mineral, is one of the main sources of acid mine drainage. Re-use. Minerals that were once thought of as gangue…

Structure of Coal Gangue after Aqueous Solution Treatment

the basic physical parameters of coal gangue, it is a kind of sandstone. The di erent acidic and alkaline static immersion solution were prepared with analytical purity, including CH3COOH, tap water, and NaOH. The initial pH formulated solutions are 4.5, 7.2, and 8.5, respectively. Solutions were added

Macroscopic and microscopic study on the compression ...

The physical parameters of the gangue of different sizes can be obtained by measuring and calculating the mass density, bulk density, crushing expansion, and porosity, which are ρ s, ρ b, k s, and φ respectively. The specific values are shown in Table 2.

Materials | Free Full-Text | Evaluation of Mechanical ...

The basic physical and mechanical parameters measured according to the test procedure and ISO/DIS 20290-1 as shown in Table 1. Based on the basic physical parameters of coal gangue, it is a …

influence of gangue particle size and gangue feeding rate ...

May 04, 2019· The gangue particle size after treatment was in the range from 0 mm to 100 mm. When the gangue particle sizes were 20, 40, 60, 80 and 100 mm, the corresponding peak velocity was 33.0, 47.6, 58.7, 68.1 and 76.4 m s-1 (Zhang et al. 2012). To sum up, two feeding schemes are determined.

Key process mineralogy parameters for rare earth ...

Dec 01, 2020· Successful separation of REE ore deposits not only depends on the differences in the physical and chemical properties between the valuable and gangue minerals, but also on the detailed determination of mineralogical parameters such as mineral …

(PDF) Identification of Coal and Gangue by Feed-forward ...

The results indicate that the 5 characteristic parameters extracted from gray-level histogram are valid as foundation in identifying the coal and gangue and also that the SVM algorithm is superior ...

Study on the Parameter Optimization and Strength Mechanism ...

Jul 28, 2020· It can be seen from Table 3 that this type of coal gangue is a low-calcium mineral with high contents of SiO 2 and Al 2 O 3 and potential high activity. Based on the experiment specification of activity index test of coal gangue (GB/T17671-1999), the coal gangue was prepared into coal gangue cement mortar, and the cement mortar was used as the reference group to test the compressive …

1 Froth Flotation – Fundamental Principles

1 1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a

煤矸双能X射线图像多维度分析识别方法研究

Then, according to the three images obtained, the relationship between key physical parameters such as coal and gangue density and ash content and image features is studied, and a feature extraction scheme is designed accordingly. A total of 8 feature parameters are extracted to …

Extraction of Coal and Gangue Geometric Features with ...

Gangue is a kind of black or gray rock with low carbon content. It is inherently contained in the ... Currently, the automated separation is performed based on the physical or chemical properties of the various components of raw coal. In view of water use, the methods of coal and gangue separation ... parameter, autocorrelation function (ACF ...

influence of gangue particle size and gangue feeding rate ...

The gangue particle size after treatment was in the range from 0 mm to 100 mm. When the gangue particle sizes were 20, 40, 60, 80 and 100 mm, the corresponding peak velocity was 33.0, 47.6, 58.7, 68.1 and 76.4 m s-1 (Zhang et al. 2012). To sum up, two feeding schemes are determined.

(PDF) Identification of Coal and Gangue by Feed-forward ...

The results indicate that the 5 characteristic parameters extracted from gray-level histogram are valid as foundation in identifying the coal and gangue and also that the SVM algorithm is superior ...

Technical parameters of drawing and coal-gangue field ...

Technical parameters of drawing and coal-gangue field movements of a fully mechanized large mining height top coal caving working face ... Based on the results from a physical experiment of large ...

TheEffectofAcidMineDrainageCorrosionontheCreep ...

Figure 1: Physical appearance of crushed coal gangue: (a) coarse aggregate and (b) fine aggregate. Table 5: Main parameters of the fine aggregate. Parameters Value Fineness modulus 2.60 Silt content 3.8% Clay lump content 0 Bulk density 1370kg/m3 Crush index 14% Table 6: Chemical property of AMD. Chemical property Value pH 5.56 Eh (mV) 401.8 ...

(PDF) Preparation and characterization of permeable bricks ...

The optimum parameters to prepare the permeable bricks were obtained at 1180–1200 °C for 45 min with 20 wt% tailings, 60–70 wt% gangue and 10–20 wt% waste ceramic.

(PDF) Instability Mechanism of a Multi-Layer Gangue Roof ...

A multi-layer gangue roof of a steeply dipping coal seam with a large mining height face area was analyzed using physical simulation, numerical simulation, theoretical analysis, and field ...

Kinetics of flotation. Order of process, rate constant ...

in which parameter n characterizes the order of the process (order of flotation kinetics). The recovery of particles in the froth product (R) after flotation time (t) is defined as: 0 00 () ( ) =1 C C t Ct Rt CC (4) where C 0 is the concentration of floating particles remaining …

Improving reducibility of iron ore pellets by optimization ...

IMPROVING REDUCIBILITY OF IRON ORE PELLETS BY OPTIMIZATION OF PHYSICAL PARAMETERS J. Pal a*, S. Ghorai a, A. Ammasi a, S.K. Hota b, V.M. Koranne b, T. Venugopalan b a CSIR-National Metallurgical Laboratory, Jamshedpur, India b Tata Steel Ltd., Jamshedpur, India (Received 06 December 2015; accepted 27 April 2016)

Crookesite Mineral Data

Eriksson L , Werner P E , Berger R , Meerschaut A , Journal of Solid State Chemistry , 90 (1991) p.61-68, Structure refinement of TlCu7Se4 from X-ray powder profile data, Locality: synthetic, Sample: GH, Note: Cell parameters are an average of Table 1 values

Experimental study on basic properties of coal gangue ...

The physical and mechanical properties of coal gangue aggregate were investigated firstly, and then the microstructure characteristics of different kinds of coal gangue aggregate were analyzed.

Trace Elements in Coal Gangue: A Review | IntechOpen

Dec 20, 2017· Coal gangue is one of the largest industrial residues. It has high ash content, low carbonaceous content, and heating value. Meanwhile, it has some trace elements. Large quantities of coal gangue cause serious environmental problems by polluting the air, water, and soil as well as occupying a tremendous amount of land. Now, coal gangue utilization is a matter of great concern …

Effect of Gangue Distributions on Cutting Force and ...

gangue minerals, especially gangue distributions on the cutting performance, are usually ignored [3] and [4]. The differences in material parameters between coal and gangue minerals lead to different mechanical behaviours [5]. For instance, load on cutter usually …

Strain softening and brittleness characteristics of gangue ...

Feb 26, 2021· By comparing the mechanical parameters of the first and second stress drops of gangue-containing coal samples, it is found that the cohesion C decreases rapidly with the increase of the stress–strain softening parameter, while the internal friction angle remains almost unchanged. The dimensionless sensitivity factor is used to analyze the ...

Extraction of Coal and Gangue Geometric Features with ...

Gangue is a kind of black or gray rock with low carbon content. It is inherently contained in the ... Currently, the automated separation is performed based on the physical or chemical properties of the various components of raw coal. In view of water use, the methods of coal and gangue separation ... parameter, autocorrelation function (ACF ...

Effect of Gangue Distributions on Cutting Force and ...

gangue minerals, especially gangue distributions on the cutting performance, are usually ignored [3] and [4]. The differences in material parameters between coal and gangue minerals lead to different mechanical behaviours [5]. For instance, load on cutter usually …

Technical parameters of drawing and coal-gangue field ...

Technical parameters of drawing and coal-gangue field movements of a fully mechanized large mining height top coal caving working face ... Based on the results from a physical experiment of large ...

TheEffectofAcidMineDrainageCorrosionontheCreep ...

Figure 1: Physical appearance of crushed coal gangue: (a) coarse aggregate and (b) fine aggregate. Table 5: Main parameters of the fine aggregate. Parameters Value Fineness modulus 2.60 Silt content 3.8% Clay lump content 0 Bulk density 1370kg/m3 Crush index 14% Table 6: Chemical property of AMD. Chemical property Value pH 5.56 Eh (mV) 401.8 ...

(PDF) Preparation and characterization of permeable bricks ...

The optimum parameters to prepare the permeable bricks were obtained at 1180–1200 °C for 45 min with 20 wt% tailings, 60–70 wt% gangue and 10–20 wt% waste ceramic.

What Does Concentration In Mineral Processing Mean ...

The parameter used to quantify the concentration in mineral processing is the concentration factor, which is the grade of valuable ore into the concentrate compared to the grade of the as-mined (the feed). ... Separating the valuable minerals from gangue requires that the physical and or chemical properties presented by minerals and gangue are ...

Trace Elements in Coal Gangue: A Review | IntechOpen

Dec 20, 2017· Coal gangue is one of the largest industrial residues. It has high ash content, low carbonaceous content, and heating value. Meanwhile, it has some trace elements. Large quantities of coal gangue cause serious environmental problems by polluting the air, water, and soil as well as occupying a tremendous amount of land. Now, coal gangue utilization is a matter of great concern …

Kinetics of flotation. Order of process, rate constant ...

in which parameter n characterizes the order of the process (order of flotation kinetics). The recovery of particles in the froth product (R) after flotation time (t) is defined as: 0 00 () ( ) =1 C C t Ct Rt CC (4) where C 0 is the concentration of floating particles remaining …

Improving reducibility of iron ore pellets by optimization ...

IMPROVING REDUCIBILITY OF IRON ORE PELLETS BY OPTIMIZATION OF PHYSICAL PARAMETERS J. Pal a*, S. Ghorai a, A. Ammasi a, S.K. Hota b, V.M. Koranne b, T. Venugopalan b a CSIR-National Metallurgical Laboratory, Jamshedpur, India b Tata Steel Ltd., Jamshedpur, India (Received 06 December 2015; accepted 27 April 2016)

Crookesite Mineral Data

Eriksson L , Werner P E , Berger R , Meerschaut A , Journal of Solid State Chemistry , 90 (1991) p.61-68, Structure refinement of TlCu7Se4 from X-ray powder profile data, Locality: synthetic, Sample: GH, Note: Cell parameters are an average of Table 1 values

Pore pressure evolution and mass loss of broken gangue ...

Oct 10, 2018· The result shows that permeability parameter k of crushed rock has a polynomial relationship with effective stress σ′ in inverse proportion, and permeability parameter β of crushed gangue has power exponent relationship with effective stress σ′ increasing in direct proportion. The particle size of 8.0–10.0 mm has a good support effect.

mining pressure in mixed workface using a gangue ...

Nov 27, 2018· 1. Introduction. In order to exploit the highly gassy and low-permeability Ji-15 coal seam in Pingdingshan No. 12 Coal Mine, the near full-rock protective coal seam is exploited for gas drainage prior to mining. However, the exploitation of such a protective coal seam will produce a large amount of gangue (Zhang et al. 2017a).If that gangue is emitted to the ground, waste gangue would put ...

Visual Positioning and Recognition of Gangues Based on ...

Jul 05, 2019· Afterwards, the texture feature recognition method based on grey-level co-occurrence matrix (GLCM) was adopted to identify coal and scratched gangue blocks. The test results show that the GLCM correlation feature parameter is effective for scratch recognition. The parameter and the said method were proved effective through experiments.

Hydraulic calculation of gravity transportation pipeline ...

2.3 Physical and mechanical parameters of backfill slurry The physical and mechanical parameters of the suggested cemented coal gangue backfill are summarized in Table 1. Table 1 Physical and mechanical parameters of backfill slurry in SCM Factor Value Density of cement/(g·cm−3) 3.00 Unit weight of cement/(g·cm−3) 1.30