After the coal gangue is crushed by a stone crusher machinery we can mix it with yellow mud After aging they are molded and then dried finally can be fired into brick products During this process it is very important to improve the plasticity of blank which requires us to use the appropriate coal gangue crushing equipment to produce fine
Get PriceCoal gangue is a solid waste generated in the process of coal mining and washing accounting for approximately 10% to 15% of the total coal output [6] Global coal production was about billion
Get PriceThere are several ways to use 1 Recovery of coal and pyrite Through a simple process good coal is washed from coal gangue low quality coal is selected from it through screening and pyrite is selected at the same time Or recover pyrite mixed coal and middling coal from the jig used for coal preparation ─ ─ plane shaker process
Get PriceThe spontaneous combustion of coal gangue dumps after reclamation causes severe harm to the ecological environment surrounding mining areas Using remote sensing technology to determine vegetation heat stress levels is an important way to evaluate the probability of a spontaneous combustion disaster The canopy spectra and chlorophyll fluorescence ChlF parameters of alfalfa were collected
Get PriceCoal 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
Get PriceCoal gangue adopts composite dry coal preparation hydrocyclone heavy medium separation etc When the coal content is above 20% coal can be recovered by coal preparation method This utilization method must use the CLUM vertical roller mill to grind the coal gangue into coal gangue powder 3 Coal gangue powder is used in building materials
Get PriceCoal gangue is an associated resource of complex industrial solid waste discharged when coal mining and washing in the production course [1 2] The amount of coal gangue has already accumulated billion tons and increasing at a rate of billion tons per year in China which has caused many serious environmental problems [3 4] In recent years many types of research have been conducted to
Get PriceWhat are the ways of coal gangue recycling ( 1 )As lightweight fine aggregate concrete it is conducive to improve the performance of concrete (2) Preparing new concrete to replace red brick or sintered coal gangue brick as wall can not only reduce the weight of wall improve seismic and safety performance but also replace 40% 70% of cement
Get PriceLearn the definition of to calcinate Check out the pronunciation synonyms and grammar Browse the use examples to calcinate in the great English corpus Glosbe Solids from the carbonator are channelled to a fluidised bed calciner where oxy fired combustion of coal produces high temperatures to calcine the CaCO3 back to calcium oxide
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Get PriceThe root of the word calcination refers to its most prominent use which is to remove carbon from limestone calcium carbonate through combustion to yield calcium oxide quicklime This calcination reaction is CaCO 3 s → CaO s CO 2 g Calcium oxide is a crucial ingredient in modern cement and is also used as a chemical flux in smelting
Get PriceCoal 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
Get PriceThe results showed that the optimal calcining procedure for coal gangue and clay shale to obtain the best pozzolanic activity is as following coal gangue and clay shale under the ratio of 7 3 were calcined at 780 °C for 2 h and then quickly cooled in the air
Get PriceTo effectively utilize coal gangue CG with low Al/Si ratio the thermal activation method was used The activated CG as supplementary cementitious materials SCMs was added into ordinary… Expand PDF View 1 excerpt cites background Thermal behaviors of a porous calcium silicate material prepared from coal bearing strata kaolinite
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Get PriceThe research results show that the compression process of gangue filling materials can be divided into three stages preliminary compaction fracture compaction and overall stable compaction and obtained the variation relationship between the compression amount of gangue and axial pressure in the compression process
Get PriceThis paper proposed a hierarchical framework for coal and gangue detection based on deep learning models using the Gaussian pyramid principle to construct multi level training data which improves the detection accuracy and solves the problem of queuing requirements in traditional methods Expand 14 PDF View 2 excerpts cites methods Save Alert
Get PriceThe study results show that the silica containing minerals in coal gangue can be promoted to transform into mullite by alumina based additives The soluble active silica is released during phase transformation in the calcination process which has a positive effect on the caustic desilication after calcination
Get PriceThe invention discloses a method for activating coal gangue calcination ash The method comprises the following steps that firstly the coal gangue calcination ash is subjected to heat treatment and when the coal gangue calcination ash is heated up to the temperature T1 of between 750 and 850 DEG C the heating is stopped and the heated coal gangue calcination ash undergoes the heat
Get Pricerecovery of coal and pyrite through simple process good coal is washed from coal gangue inferior coal is selected through screening and pyrite is picked out at the same from the coal preparation of the jig plane shaker process recovery of pyrite wash coal and coal coal can be used as fuel for power boilers washed …
Get PriceCoal 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 which eventually results in ecological
Get PriceDOI / Corpus ID 218780181 Nondestructive Identification of Coal and Gangue via Near Infrared Spectroscopy Based on Improved Broad Learning article{Zou2020NondestructiveIO title={Nondestructive Identification of Coal and Gangue via Near Infrared Spectroscopy Based on Improved Broad Learning} author={Liang Zou and Xinhui Yu and Ming Li and Meng Lei and Han Yu
Get PriceCoal gangue as a solid waste generated during coal mining and washing not only encroaches on a large number of land resources but also poses certain risks to the environment It is reported that the cumulative amount of coal gangue piled up in China has reached 6 billion tons and the annual discharge amount is about 500 800 million tons
Get Pricethe formulation of the substrate was optimized using an orthogonal experiment with four factors coal gangue g to soil g ratio 1000 0 750 250 500 500 maize straw content 0 25 and 50 g kg−1 fly ash content 0 75 and 150 g kg−1 and water retention agent content 0 1 and 2 g kg −1 the results showed that coal gangue …
Get PriceWe developed a new calcination method to convert coal gangue CG a common waste generated from coal production process into a modified form which could be used as an adsorbent to remove Mn 2 from aqueous solution
Get PriceGangue 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
Get PriceGangue also called coal gangue is the solid waste discharged in coal mining process and coal washing process black rock harder than coal Its carbon content is low and exists along with coal seam Gangue could be found in roof bottom board inter layer and it could be selected in washing process The main ingredient are Al2O3 SiO2 Fe2O3
Get PriceThe process of releasing CO 2 during the calcination of coal gangue can be divided into three stages The temperature range of the first stage was ° °C and the infrared absorption intensity of CO 2 in this stage changed slightly The temperature range of the second stage was ° °C
Get PriceLeaching of calcined coal gangue in HCl solution with the main reaction 1 The phase transformation of calcination products was investigated by PANalytical X pert PW3040 PANalytical Ltd Almelo The Netherlands The operating voltage and current were 40 kV and 40 mA respectively The diffraction angle was scanned from 5° to 90°
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