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A concrete material with waste coal gangue and fly ash ...

Before use, coal gangue was crushed and washed to remove the dust. Next, after drying, they were sieved with a 30-mm sieve. The levels of the trace elements As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn in coal gangue were determined. The powdered coal gangue …

Preparation of SiC from acid‐leached coal gangue by ...

For the comprehensive utilization of coal gangue, acid-leached coal gangue was used as silicon source and part of carbon source, low ash anthracite and degreasing cotton were added respectively as supplementary carbon source, SiC and SiC fiber were prepared by carbothermal reduction method accordingly.

Why we need use the coal gangue grinding mill? - ...

The comprehensive utilization rate of coal gangue is over 50% in China; the main application of coal gangue is in the areas of electricity generation, building material production, land reclamation, backfill in subsidence areas etc. Coal gangue grinding mill has high application value in the area of coal gangue disposal and recycle, the performance of coal gangue grinding mill has …

The use of modified coal gangue for the remediation and ...

12%The coal gangue sample had been authorized by Sichuan Guxu coalfield development Co., Ltd. for the scientific research The original coal gangue was first manually separated to remove impurities and white gangue, and it was then ground and passed through a 160 mesh with a ball mill for further use.

Optimizing the formulation of coal gangue planting ...

Abstract With the development of China's coal industry, coal gangue has become one of the most extensive solid wastes. The collection of soil from other places for land reclamation has become a commonly used technology for ecological restoration of coal-mining areas in China. The purpose of this study was to use coal gangue as a new type of planting substrate component, with the goal of ...

Identification Method of Coal and Coal Gangue Based on ...

To solve the problems of the difficult feature extraction, poor feature credibility and low recognition accuracy of coal and gangue, this paper utilizes the difference in the dielectric properties of coal and gangue and in combination with a support vector machine (SVM) to propose a recognition method based on the dielectric characteristics of coal and gangue. The influence rule of the edge ...

The use of modified coal gangue for the remediation and ...

The coal gangue sample had been authorized by Sichuan Guxu coalfield development Co., Ltd. for the scientific research The original coal gangue was first manually separated to remove impurities and white gangue, and it was then ground and passed through a 160 mesh with a ball mill for further use.

Nepheline‐based water‐permeable bricks from coal gangue ...

Nepheline-based water-permeable bricks are prepared with coal gangue and aluminum hydroxide by raw material pretreating, mixing, isostatic molding, roasting, and self-curing. These bricks exhibit balance between their mechanical and water-permeable properties. In this study, two main factors, the raw material ratio and the molding pressure, are ...

China Coal Gangue Industry Market Research and Investment ...

The coal gangue power generation can fully use the effective heat of coal gangue which also an effective way to develop the solid waste. Through testing and promoting, other developing methods are gradually adopted by coal mining industry. The special resource, coal gangue, will become our wealth and plays a more significant role in economic ...

The Study Of Influence Of Coal Mining On Land Resources ...

The theoretical basis is provided for the reclamation and reclamation of the coal gangue filling reclamation area in the coal mine and even in our whole country.The results show that:(1) The 3S technique is rapid, accurate and convenient access to the study area land use and land cover dynamic change:the continued exploitation of coal makes ...

Trace Elements in Coal Gangue: A Review | IntechOpen

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 …

Coal Gangue Crushing and Screening - JXSC Mine

Coal Gangue Meaning. Coal Gangue is a kind of solid waste discharged from coal mining and coal washing. It is also a kind of black-gray rock with lower carbon content and harder than coal. Its main components are Al2O3 and SIO2. In addition, it contains various amounts of Fe2O3, Cao, MgO, Na2O, K2o, P2O5, SO3 and traces rare elements (gallium ...

Research of Comprehensive Utilization of Coal Gangue

For the recycling use of coal gangue, the enterprise of natural power is insufficient, in this situation, how to encourage and supervise the enterprise to carry out the comprehensive utilization of coal gangue, need to coordinate to solve a set of perfect system. There is a lack of talents in non-coal industry and the application of relevant ...

Coal gangue detection and recognition algorithm based on ...

4.1 Design and implementation of coal gangue detection and recognition device. This study proposes an method for coal gangue detection and recognition on the basis of the DCN-YOLOv3 algorithm. Firstly, the method collects real-time video images of a conveyor belt operation through an industrial camera erected perpendicular to the conveyor belt.

The environmental characteristics of usage of coal gangue ...

The main chemical compositions of coal gangue are SiO 2 (54–60%), Al 2 O 3 (23–27%), Fe 2 O 3 (6–9%) and CaO (7–11%), which are deemed a suitable raw material for brick making (Raut et al., 2011).The high SiO 2 and Al 2 O 3 contents in the coal gangue suggested high compositions of clay minerals and quartz. The high concentration of Fe 2 O 3 is predominantly …

Coal and Gangue Separating Robot System Based on Computer ...

Separating coal and gangue can improve coal quality, save energy, and reduce consumption and make rational use of resources. The separated gangue can also be reused. Robots with computer vision technology have become current research hotspots due to simple equipment, are efficient, and create no pollution to the environment.

Coal gangue detection and recognition algorithm based on ...

of coal gangue is an important part of coal mine intelligenti-sation [1–3]. In coal mining, a large amount of coal gangue is mixed with raw coal, and it easily causes pollution and reduces the raw coal's combustion heat; therefore, gangue separation is

Influence of coal gangue mulching with various thicknesses ...

Coal gangue, as a type of solid waste discharged during coal mining and coal washing, occupies a large amount of land resources owing to accumulated gangue…

Utilization of Coal Gangue Aggregate for Railway Roadbed ...

Then, the technology to use coal gangue as filler in railway subgrade was put forward based on a real engineering application with the Jingang coal-carrying railway special line. Field tests showed that the coal gangue roadbed had excellent performance. The dynamic stiffness expressed as K30 was more 130 MPa/m, which meets the requirement for ...

Factors Affecting Brittleness Behavior of Coal-Gangue ...

Coal gangue, which is the solid waste produced during the coal processing, causes serious environmental problems. Lightweight concrete by making use of the coal-gangue ceramsite as the aggregate has many advantages as the construction material. However, the high brittleness of lightweight aggregate concrete is one of the problems for its application in building infrastructure.

Recognition Methods for Coal and Coal Gangue Based on Deep ...

Recognizing coal and coal gangue is an important part of the coal industry and is mainly conducted via human sorting at present. Consequently, considerable manpower is needed, which adds a burden ...

Improved holding and releasing capacities of coal gangue ...

Activation is an effective method to improve adsorption capacity of coal gangue, however, most activated gangues reported have limited adsorption capacity for phosphate because of the electronegativity, affecting their use in agricultural production …

Coal Yard Coal Gangue Pulverizer - Gravel And Sand ...

Coal gangue pulverizing article ecological recovery greening substrate and method of use thereof (PAT - CN101502214) XIGANG WANG, TINGNING ZHAO, BINHONG YUAN XIGANG WANG Patent: Unexamined APPLIC. open to Public inspection - China on ...::: 1,348 coal gangue products are offered for sale by suppliers on Alibaba.com A wide variety of coal gangue […]

Extraction of alumina from alumina rich coal gangue by a ...

1. Introduction. Coal gangue is an industrial solid waste produced by coal mining and processing [1–3].The average production of gangue accounts for 10–15% of raw coal production [4,5], making coal gangue one of the biggest solid wastes in China.At present, utilization ratio of coal gangue can reach about 60% in some countries.

Utilization of Coal Gangue Aggregate for Railway Roadbed ...

First, the basic properties of coal gangue such as particle size distribution, ignition loss, strength change under water softening, and compression performance were measured. Then, the technology to use coal gangue as filler in railway subgrade was put forward based on a real engineering application with the Jingang coal-carrying railway ...

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, and were dumped, may later find a commercial use.

China Coal Gangue, Coal Gangue Manufacturers, Suppliers ...

China Coal Gangue manufacturers - Select 2021 high quality Coal Gangue products in best price from certified Chinese Block Making Machine, Block Machine suppliers, wholesalers and factory on Made-in …

Coal gangue – Electro Magnetic Industries

Among them, coal gangue and other low calorific value fuels was on the use of 200 million tons by power plant, 90 million tons of coal gangue bricks were used; road construction, underground coal waste reclamation and reclaiming land consumptive more than 100 million tons. Produce 5 billion cubic meters of mine water, and 3.6 billion cubic ...

The use of coal gangue and crushing equipment_Kefid Machinery

The use of coal gangue and crushing equipment. Coal gangue is a solid waste discharged during coal mining and coal washing. It is a dark-gray rock with lower carbon content and harder than coal that is associated with coal seams during coal formation. Coal gangue is mainly used to produce gangue cement, lightweight aggregates of concrete ...

Comprehensive utilization and environmental risks of coal ...

In the former Soviet Union, the main use route of coal gangue is as a filling material for underground mined areas, as well as a source of coal gangue bricks and porous aggregate (Liu et al., 2012). As the country with the largest coal production, coal gangue …