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defination of coal gangue

What is Gangue in Chemistry - Definition

A gangue in chemistry can be defined as an unwanted material or impurities in the form of sand, rock or any other material that surrounds the mineral in an ore deposit. This substance is common when it comes to the aspect of mining. Usually, gangue has to be separated from mineral and the process used is known as mineral dressing, mineral ...

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.

definition of coal gangue

Gangue Wikipedia. For example, in 2002, about 130 million tons of gangue were produced per year from coal mining in China. This, mixed with the 60 million tons of coal mud also produced, could be used for power generation and the coal mining gangue could be combined with coal

Coal gangue – Electro Magnetic Industries

Main application of coal gangue. (1) To recycle coal and pyrite By simple technology, to wash and elect high quality coal from coal gangue, at the same time, screen out low-quality coal and pick out pyrite. Or recycle pyrite, washed mixing coal and medium coal from coal preparation jigger- shaker flow plane.

What Is Coal Gangue In Usa

Definition Of Coal Gangue. In mining gangue . could be used for power generation; and the coal mining gangue could be combined with coal ash to produce building materials. coal gangue crusher mobile crusher jaw crusher - In coal production definition of coal gangue - Crusher Machine .

Energies | Free Full-Text | Automatic Coal and Gangue ...

Gangue is a solid waste with low carbon content, which is usually mixed into the raw coal during production. Due to the inefficiency of gangue separation, much gangue flows out of the mining area, which increased the transporting costs and caused severe pollution to the environment [].Therefore, effectively sorting gangue from the raw coal is essential in improving the quality of the coal and ...

Valorization of calcined coal gangue as coarse aggregate ...

Coal gangue is a by-product generated from coal mining and washing. Using coal gangue as aggregate is an effective approach of valorization this high-volume industrial waste, not only solving the ...

Visual Positioning and Recognition of Gangues Based on ...

Jul 05, 2019 · The recognition results of coal and gangue are listed in Table 1. The results show that the gangues were identified accurately. In other words, the GLCM-based recognition method can effectively distinguish between gangue and coal, after the preparation of scratch features. Table 1. Recognition results of coal and gangue

Multitechnique investigation of concrete with coal gangue ...

1. Introduction. China is a main coal producer in the world, its annual consumption of coal accounts for 50% of the world's total coal consumption , .Coal gangue is the companion organism of coal , which is one of the largest solid wastes in China .The huge amount of coal gangue not only occupies land, but also pollutes the environment by producing toxic gases through spontaneous combustion .

Factors Affecting Brittleness Behavior of Coal-Gangue ...

Sep 28, 2020 · 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.

Gangue financial definition of gangue

The coal production of China now ranks top in the world, and so there is the biggest coal gangue yield. Hydrothermal synthesis of SBA-15 using sodium silicate derived from coal gangue ores are complex assemblages of mineral phases, some being economically valuable and others being considered as uneconomic, gangue material or even as penalties.

Fractal characteristics of crushed particles of coal ...

Jan 01, 2017 · 1. Introduction. In coal mining, gangues which are piled up on the surface after discharge pose a threat to the environment around mining areas , , , .Coal mining by solid backfill mining technology, as a green mining method was proposed to solve problems such as pressed coal and gangue deposition presented by traditional mining technologies , , . ...

Gangue | definition of gangue by Medical dictionary

tailings: Residual gamma-radiation-rich, sandy waste remaining after extraction of uranium from mined ore.

Evaluating the distribution and potential ecological risks ...

Oct 15, 2020 · Coal plays a dominant role (70%) in energy consumption of China (Huang et al. 2017).A large amount of solid waste-coal gangue would be produced in processing and accounts for 10–15% of the raw coal, approximately (Li and Wang 2019).Currently, the cumulative amount of coal gangue is estimated to be more than 5.0 billion tons given the large production of coal that covers an area of

Assessment of heavy metal in coal gangue: distribution ...

Sep 18, 2018 · In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings. In order to find the law of heavy metal release and to evaluate the potential ecological risk, five kinds of coal gangue at different weathering degrees were collected from a coal mine named Suncun, an over 100 ...

Thermogravimetric analysis of the co-combustion of coal ...

respectively. Co-combustion can reduce the activation energy of coal gangue during the ini-tial and end stages. Therefore, co-combustion is helpful to improve the problems of low calo-rific value and refractory burnout of coal gangue. Introduction Coal gangue (CG) is a common industrial solid waste. An economical, reliable, and compre-

Experimental Study on Dynamic Mechanical Properties of ...

It can be seen from Table 2 that, in the chemical composition of coal gangue, the mass fractions of SiO 2 and Al 2 O 3 accounted for a large proportion: 50.86% and 12.37%, respectively. According to the classification relationship between the chemical composition of coal gangue and rock type, it was preliminarily determined that the coal gangue belonged to sandstone gangue.

Influence of rainfall infiltration on the stability of ...

Therefore, a coal gangue accumulated slope prone to failure in Fuxin area of Northeast China was considered to evaluate its failure mechanism under different rainfall events.

Assessment of heavy metal in coal gangue: distribution ...

Sep 18, 2018 · In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings. In order to find the law of heavy metal release and to evaluate the potential ecological risk, five kinds of coal gangue at different weathering degrees were collected from a coal mine named Suncun, an over 100 ...

Introduction to Mineral Processing or Beneficiation

Jan 12, 2018 · Most rock deposits contain metals or minerals, but when the concentration of valuable minerals or metals is too low to justify mining, it is considered a waste or gangue material. Within an ore body, valuable minerals are surrounded by gangue and it is the primary function of mineral processing , to liberate and concentrate those valuable minerals.

Glossary of Mining Terms - SEC

Anthracite - A hard, black coal containing a high percentage of fixed carbon and a low percentage of volatile matter. Anticline - An arch or fold in layers of rock shaped like the crest of a wave. Apex - The top or terminal edge of a vein on surface or its nearest point to the surface. Ash - The inorganic residue remaining after ignition of coal.

APES Ch. 14 Flashcards | Quizlet

removes deep deposits, removes coal and metal ores that are too deep to be extracted by surface mining. overburden. result of surface mining, the soil and rock overlying a useful mineral deposit. spoils. piles of overburden, causes erosion. tailings. a pile of gangue, pile of

Beneficiation - Wikipedia

In the mining industry or extractive metallurgy, beneficiation is any process that improves (benefits) the economic value of the ore by removing the gangue minerals, which results in a higher grade product (ore concentrate) and a waste stream ().There are many different types of beneficiation, with each step furthering the concentration of the original ore.

Dynamic Response Analysis of the Coal Gangue-like Elastic ...

Oct 27, 2019 · The impact and collision behavior between the coal gangue and the hydraulic support widely exists in the top coal caving. However, due to the complex interactions between the large number of coal gangue particles in the mining surface and the limitations of the coal mining technology and other factors, it becomes a difficult problem to study the collision behavior and the contact response ...

APES mining vocab Flashcards | Quizlet

PLAY. Part of a metal-yielding material that can be economically and legally extracted at a given time. Comprised of two parts; the ore mineral and the waste mineral material. Layer of soil and rock overlying a mineral deposit. Surface mining removes this layer. Nice work! You just studied 17 terms!

Influence of rainfall infiltration on the stability of ...

Therefore, a coal gangue accumulated slope prone to failure in Fuxin area of Northeast China was considered to evaluate its failure mechanism under different rainfall events.

Coal | National Geographic Society

Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity.It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning). Coal is the largest source of energy for generating electricity in the world, and the most abundant fossil fuel in the United States.

PAPER OPEN ACCESS Thermogravimetric analysis of

Apr 06, 2020 · Coal gangue 425 620 805 45.81 80% coal gangue 440 550 865 47.43 60% coal gangue 446 626 889 60.01 40% coal gangue 450 604 1146 67.05 20% coal gangue 451 607 1040 85.94 Petroleum coke 454 652 1048 80.64 3.1.2. Analysis of DTG curves with different mixing ratios. It can be seen from the DTG graph that the

Definition > Coal

Coal is a sedimentary rock of biochemical origin which is very rich in carbon.This fossil fuel is part of what is generically speaking called coal.. There is hard, non-bituminous coal with 90% carbon content and bituminous coal (70% to 85% carbon content). It was formed by the slow geological transformation of organic plant matter. It has high calorific value.

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

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

Coal gangue, which has a similar composition to clay [], is a solid waste produced during coal mining and processing [6,7,8,9,10], and its annual production accounts for about 10% to 15% of the coal output in that year [6,7,11].Fresh undisturbed coal gangue does not have pozzolanic activity [], which in general leads to the low strength of coal gangue aggregate concrete and severely limits its ...

Slag definition and meaning | Collins English Dictionary

Aug 29, 2021 · Slag definition: Slag is an insulting term for a woman who has a lot of sexual partners . | Meaning, pronunciation, translations and examples