[PDF] Extraction of Coal and Gangue Geometric Features

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 computer vision technology In the literature, research on image recognition and classification of coal and gangue is mainly based on the grayscale and texture features of the

Extraction of Coal and Gangue Geometric Features with

Nowadays, the manual selection of gangue is inevitable for most coal mining enterprises in China, although this process is regarded as a laborintensive job with low efficiency and terrible working environment In Figure 1, two female workers are standing near the conveyor belts waiting for the upcoming coal and gangue Moreover, the tedious work is often intolerable

Extraction of Coal and Gangue Geometric Features with

Extraction of Coal and Gangue Geometric Features with Multifractal Detrending Fluctuation Analysis by Kai Liu 1, Xi Zhang 1 and YangQuan Chen 2,* 1

Extraction of Coal and Gangue Geometric Features with

Thus, technology for the automatic separation of coal and gangue is severely needed in the coal mining industry Figure 1 Manual separation of coal and gangue 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 can be divided

Improved extraction of alumina from coal gangue by

01/11/2016· Alumina extraction from coal gangue could offer an alternative to bauxite as a source of alumina Mechanically modification by grinding is an effective activation method to improve alumina recovery from coal gangue The effect of grinding on coal gangue, however, had not been investigated systematically Present understanding regarding the effects of

Extraction of alumina from alumina rich coal gangue by a

alumina extraction rates 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 There are

Extraction of alumina from alumina rich coal gangue by a

Efficient Extraction of SiO2 and Al2O3 from Coal

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

Extraction of alumina from alumina rich coal gangue by a

Vast quantities of gangue from coal mining and processing have accumulated over the years and caused significant economic and environmental problems in China For high addedvalue utilization of alumina rich coal gangue (ARCG), a mild hydrochemical process was investigated to extract alumina The influences of NaOH concentration, mass ratio of alkali to gangue,

Gasification and activation behaviors of coal gangue with

1 Introduction The accumulation of coal gangue (gangue) has wasted lots of land resources [], and the harmful components in gangue will migrate into soil after rainwashed []Moreover, gangue also encounters a serious spontaneous combustion problem which always resulting in a large amount of harmful gas emission [3,4]Nowdays, the gangue with a high heat value

[PDF] Extraction of Coal and Gangue Geometric Features

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 computer vision technology In the literature, research on image recognition and classification of coal and gangue is mainly based on the grayscale and texture features of the

Extraction of aluminum and iron from coal gangue by low

02/03/2022· The fresh coal gangue was neutralized with the recycled acid leaching solution, yielding the concentrations of aluminum and iron in the extract solution of 6220g/L, 5795g/L respectively Compared with the conventional acid leaching process, the acid consumption by the twostep process is lower, and the acid utilization efficiency is higher Through the

Extraction of Coal and Gangue Geometric Features with

Thus, technology for the automatic separation of coal and gangue is severely needed in the coal mining industry Figure 1 Manual separation of coal and gangue 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 can be divided

Extraction of SiO2 and Al2O3 from coal gangue activated by

Extracting valuable elements from coal gangue is an important method for the utilization of coal gangue In order to obtain the suitable technological conditions and the acid leaching kinetic

Extraction of alumina from alumina rich coal gangue by a

Vast quantities of gangue from coal mining and processing have accumulated over the years and caused significant economic and environmental problems in China For high addedvalue utilization of alumina rich coal gangue (ARCG), a mild hydrochemical process was investigated to extract alumina The influences of NaOH concentration, mass ratio of alkali to gangue,

Coal gangue detection and recognition algorithm based on

08/09/2021· The YOLOv4 network correctly detected coal and gangue of different sizes, but for the detection of largesized coal and gangue (eg third picture with a size of 6–8 cm and the second and third pictures with a size of 10–12 cm), it was prone to local misdetection or repeated detection The YOLOv5 network showed individual false detections in the detection of coal

Integrated green mining technology of “coal mininggangue

24/08/2021· Operation effect of coal mininggangue washingbackfilling system Coal mining It was complicated to lay out the shortdistance multiseam mining system in Tangshan Mine Therefore, the multiseam combined mining system was designed to optimize the working face layout and mining sequence Since the implementation of the project, the coal mining

Effects of Fine Gangue on Strength, Resistivity, and

21/05/2015· The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressive strength of CGB were investigated at 3 d

Review of Coal Gangue Characteristics and Ecological

01/05/2021· Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China The disorderly accumulation of coal gangue not only occupies a large amount of land resources and causes natural disasters, but also pollutes the surrounding ecological environment, which in turn affects human health and normal production

Extraction of Coal and Gangue Geometric Features with

Thus, technology for the automatic separation of coal and gangue is severely needed in the coal mining industry Figure 1 Manual separation of coal and gangue 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 can be divided

Extraction of aluminum and iron from coal gangue by low

02/03/2022· The fresh coal gangue was neutralized with the recycled acid leaching solution, yielding the concentrations of aluminum and iron in the extract solution of 6220g/L, 5795g/L respectively Compared with the conventional acid leaching process, the acid consumption by the twostep process is lower, and the acid utilization efficiency is higher Through the

Extraction of Coal and Gangue Geometric Features with

Extraction of Coal and Gangue Geometric Features with Multifractal Detrending Fluctuation Analysis Kai Liu, Xi Zhang, YangQuan Chen; Affiliations Kai Liu School of Mechanical Electronic & Information Engineering, China University of Mining and Technology, Beijing , China Xi Zhang School of Mechanical Electronic & Information Engineering, China

Extraction of coal and gangue geopreview & related

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 computer vision technology In the literature, research on image recognition and classification of coal and gangue is mainly based on the grayscale and texture features of the

Extraction of Coal and Gangue Geometric Features with

Ma et al proposed the coal gangue online recognition and automation selection system with digital image processing technology [4] Zheng et al studied the pneumatic separation of coal and gangue based on the machine vision system [5] Figure2shows a design of an automated coal–gangue separation system by using the computer vision

e traction of al gangue

e traction of al gangue Cna Method For Extracting Alumina From Coal gangue: the rocky impurities like present in an ore are called gangue charge: the mixture of materials fed into a furnace to extract a metal is called charge flux: the substance added to get rid of gangue in the extraction of metal is called flux If you want to learn about our products , please call or

Extraction of Coal and Gangue Geometric Features with

Extraction of Coal and Gangue Geometric Features with Multifractal Detrending Fluctuation Analysis By Kai Liu, Xi Zhang and YangQuan Chen Cite BibTex; Full citation; Publisher: 'MDPI AG' Year: 2018 DOI identifier: 103390/app OAI identifier:

Gangue Wikipedia

In mining, gangue (/ ɡ æ ŋ /) is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore depositIt is thus distinct from overburden, which is the waste rock or materials overlying an ore

Release characteristics of heavy metals from coal gangue

Coal gangue is an inevitable byproduct in the process of coal mining With the development of the coal mining industry in recent years, the heavymetal pollution from the coal gangue is paid more and more attention (Zhang et al, 2009; Sun, 2005; Sun et al, 2009) According to statistics, the coal gangues in China had already accumulated more than 1500 waste dumps, cover an

Review of Coal Gangue Characteristics and Ecological

01/05/2021· Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China The disorderly accumulation of coal gangue not only occupies a large amount of land resources and causes natural disasters, but also pollutes the surrounding ecological environment, which in turn affects human health and normal production