Paper making technology and process of coal gangue

Exploration on Methods of Making PAFC Using Coal

The paper expounded the impact of coal gangues on environment. Also it deals with the feasibility of making polymeric aluminum and ferric chloride (PAFC) using coal gangue. Through orthogonal test, the paper explores such factors as roasting temperature, roasting time, hydrochloric acid concentration, reaction temperature and grain size influence on the making process, and give the best ...

More

Preparation and characterization of coal gangue ...

This paper explores the impacts of sodium hydroxide modulus, alkali lye amount and liquid–solid ratio on the strength and microstructure of coal gangue geopolymer materials, involving a total of ...

More

Coal gangue – Electro Magnetic Industries

Coal gangue processing and production process. Coal gangue comprehensive recycling will be an effective way to alleviate the shortage of resources. With the development of science and technology, gangue recycling of products will be a breakthrough and innovation, and to create new value for the maximum utilization of fly ash.

More

Preparation and Reaction Mechanism Characterization of ...

In this paper, slag is used as a calcium source to make alkali-activated coal gangue-slag (AACGS) based material. The reaction mechanism of AACGS materials was discussed in depth by means of XRD, FT-IR, 29 Si MAS-NMR (nuclear magnetic resonance) and SEM-EDS (energy dispersive spectrometer). The experimental results show that coal gangue can be used as a raw material for preparing alkali ...

More

Coal and Gangue Separating Robot System Based on

2021-2-14  The coal gangue robot sorting system based on computer vision proposed in this paper is an application of artificial intelligence and robot technology. The realization of unmanned or less humanized underground operations has important practical significance and is a frontier attempt.

More

Coal and Coal Gangue Separation Based on Computer Vision

The separation of coal and gangue is an important process of the coal preparation technology. The conventional way of manual selection and separation of gangue from the raw coal can be replaced by ...

More

(PDF) Power Generation from Coal Gangue in China:

This paper provides an overview on the current status of power generation in China using coal gangue. The government regulation towards the use of coal gangue for power generation is introduced.

More

Extraction of Coal and Gangue Geometric Features with ...

2019-7-11  coal–gangue separation system with computer vision, in which industry cameras and computers are used to identify whether the object is coal or gangue through the pattern recognition technology. Ma et al. proposed the coal gangue on-line recognition and automation selection system with digital image processing technology [4].

More

The environmental characteristics of usage of coal gangue ...

2014-1-1  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 controlled by sulfide ...

More

Exploration on Methods of Making PAFC Using Coal

The paper expounded the impact of coal gangues on environment. Also it deals with the feasibility of making polymeric aluminum and ferric chloride (PAFC) using coal gangue. Through orthogonal test, the paper explores such factors as roasting temperature, roasting time, hydrochloric acid concentration, reaction temperature and grain size influence on the making process, and give the best ...

More

Environmentally friendly utilization of coal gangue as ...

Coal gangue is one of the largest discharged industrial solid wastes, which is generated in the processes of coal mining and washing. To accelerate the in-situ utilization of coal gangue, this paper explored coal gangue aggregates (CGA) as the single aggregate source to prepare shotcrete used for coal mine tunnel underground in local.

More

[PDF] A Study of Multispectral Technology and Two ...

Coal is one of the main sources of human energy. In the process of coal mining, separating gangue from coal has great significance for environmental protection and energy conservation. The core problem in the separation of gangue is the recognition of coal and gangue. In this study, multispectral technology was used to identify gangue. First, set up a data acquisition system in the laboratory ...

More

The clean production technology of replacement of coal ...

Underground gangue filling technology in coal mines is one of the effective ways to realize green mining. In this paper, a process of underground raw coal primary selection is proposed, which is ...

More

Preparation and characterization of coal gangue ...

This paper explores the impacts of sodium hydroxide modulus, alkali lye amount and liquid–solid ratio on the strength and microstructure of coal gangue geopolymer materials, involving a total of ...

More

Coal and Gangue Separating Robot System Based on

2021-2-14  The coal gangue robot sorting system based on computer vision proposed in this paper is an application of artificial intelligence and robot technology. The realization of unmanned or less humanized underground operations has important practical significance and is a frontier attempt.

More

Synthesis of Na-A zeolite from coal gangue with the in ...

2017-5-9  Coal gangue (CG), a complex solid waste from coal industry, is still underutilized, thus leading to disposal problems. However, high contents of silica and alumina in this material make it a potential zeolite pre-cursor. In this paper, pure, single-phase and highly crystalline Na

More

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

2020-4-29  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.

More

Coal and Coal Gangue Separation Based on Computer Vision

The separation of coal and gangue is an important process of the coal preparation technology. The conventional way of manual selection and separation of gangue from the raw coal can be replaced by ...

More

Extraction of Coal and Gangue Geometric Features with ...

2019-7-11  coal–gangue separation system with computer vision, in which industry cameras and computers are used to identify whether the object is coal or gangue through the pattern recognition technology. Ma et al. proposed the coal gangue on-line recognition and automation selection system with digital image processing technology [4].

More

[PDF] A Study of Multispectral Technology and Two ...

Coal is one of the main sources of human energy. In the process of coal mining, separating gangue from coal has great significance for environmental protection and energy conservation. The core problem in the separation of gangue is the recognition of coal and gangue. In this study, multispectral technology was used to identify gangue. First, set up a data acquisition system in the laboratory ...

More

Environmentally friendly utilization of coal gangue as ...

Coal gangue is one of the largest discharged industrial solid wastes, which is generated in the processes of coal mining and washing. To accelerate the in-situ utilization of coal gangue, this paper explored coal gangue aggregates (CGA) as the single aggregate source to prepare shotcrete used for coal mine tunnel underground in local.

More

Preparation and characterization of coal gangue ...

This paper explores the impacts of sodium hydroxide modulus, alkali lye amount and liquid–solid ratio on the strength and microstructure of coal gangue geopolymer materials, involving a total of ...

More

Coal gangue detection and recognition algorithm based

2021-9-8  Focusing on various problems in coal gangue detecting and recognising algorithms, such as limited receptive field, slow convergence rate and low accuracy of small particle recognition, this paper proposes a coal gangue detection and recognition algorithm based on

More

Synthesis of Na-A zeolite from coal gangue with the in ...

2017-5-9  Coal gangue (CG), a complex solid waste from coal industry, is still underutilized, thus leading to disposal problems. However, high contents of silica and alumina in this material make it a potential zeolite pre-cursor. In this paper, pure, single-phase and highly crystalline Na

More

Coal and Coal Gangue Separation Based on Computer Vision

The separation of coal and gangue is an important process of the coal preparation technology. The conventional way of manual selection and separation of gangue from the raw coal can be replaced by ...

More

Extraction of Coal and Gangue Geometric Features with ...

2019-7-11  coal–gangue separation system with computer vision, in which industry cameras and computers are used to identify whether the object is coal or gangue through the pattern recognition technology. Ma et al. proposed the coal gangue on-line recognition and automation selection system with digital image processing technology [4].

More

An Image Recognition Approach for Coal and Gangue

Effectively, in that paper, the attained recognition rate was 95.88 %. Li and Sun [10] presented a recognition system for coal and gangue samples in which the authors utilized the least square ...

More

Mixture Ratio Design Optimization of Coal Gangue-Based ...

2021-4-20  A green concrete, new type of coal gangue-based geopolymer concrete, was prepared. Coal gangue geopolymer concrete contains many mineral admixtures and alkaline activators; the concrete mixture ratio design has always been a complex problem. The framework of the mix design optimization by the proposed method is established in this work. The paper aims to minimize the economic cost

More

Efficient Extraction of SiO2 and Al2O3 from Coal Gangue

Coal gangue is mainly composed of SiO2, Al2O3 and other components. It is a huge reserve of aluminum and silicon resources. The coal gangue stockpiles in China is more than 5 billion tons at present, of which contain Al2O3 more than 1 billion tons, SiO2 more than 2.5 billion tons. It will make supplement for the lack of bauxite resources in China to some extent by extracting Al2O3 with ...

More