coal-gangue
Gangue, 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 …
The Sustainable Utilization of Coal Gangue in Geotechnical …
Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining. A thorough understanding of environmental concerns associated with the current model of CG utilization and potential future application is gaining paramount importance.
Analysis and improvement measures of defective coal gangue fired brick
analysis of the chemical composition of coal gangue, it is found that the coal gangue fired brick can. completely replace th e solid brick m ade of clay, which greatly reduces the env ironmental ...
Ecological Mortar from Recycled Composite Powder with Waste Clay Brick
The clay brick and powder recycled from construction and industrial waste may be utilized as recycled construction materials. To alleviate the negative environmental impact of the cement industry's CO 2 emission, waste clay brick was used as fine aggregate, clay brick powder (CBP), and coal gangue powder (CGP) were utilized as …
Preparation of coal gangue-slag-fly ash geopolymer …
Solid waste silica-alumina materials: ① Raw coal gangue was obtained from Handan (Hebei, China). The microscopic morphology is shown in Fig. 1, the XRD pattern is shown in Fig. 2, and the industrial analysis is shown in Table 2.The main mineral components of the raw coal gangue are kaolinite (52.2%), mica (16.9%) and quartz …
Comprehensive utilization and environmental risks of coal gangue: A
It is suggested that coal gangue power plant mainly uses coal gangue with calorific value above 6.27 MJ kg −1 - 8.336 MJ kg −1 (1500 kcal kg −1 - 2000 kcal kg −1) (Wang, 2004a), and coal gangue with sulfur content exceeding 2% cannot be used for brick production. In addition, it is worth exploring the scientific combination of various ...
Textile-Reinforced Mortar Strengthening of Masonry Piers …
The diffusion and adoption of coal gangue sintered bricks can effectively relieve the negative impact of coal gangue on the ecological environment. In China, this type of brick has been widely used for the construction of masonry structures. Existing masonry structures that use these types of bricks can experience severe problems …
Superior Quality and Reliable Two-Stage Coal Gangue Crusher
Superior Quality and Reliable Two-Stage Coal Gangue Crusher, Find Details and Price about Coal Gangue Crusher Coal Gangue Grinder from Superior Quality and Reliable Two-Stage Coal Gangue Crusher - Henan Yigong Machinery & Equipment Co., Ltd.
How to Make Clay Bricks with Coal Gangue?
Coal gangue sintered bricks should generally be burned once. The bricks are usually 10 to 14 layers high. 3.5 Drying Drying sometimes determines whether the product has quality problems such as cracks, dumbness, …
Study on the Reactivity Activation of Coal Gangue for …
In this study, the research aim is to enhance the activity index of activated coal gangue and study its activation mechanism. The activation process of coal gangue was optimized through orthogonal tests, and the Back-Propagation (BP) neural network model was improved using a genetic algorithm. With the effects of grinding duration, …
CN205074041U
The utility model provides a raw materials grinder of high efficiency gangue sintering hollow brick, top including fine crusher support and fine crusher support is provided with crushing case, the pillar, the first electric motors and second motor, the top of smashing the case is provided with the feeding case, the inside of smashing the case is provided with …
Comprehensive utilization and environmental risks of coal gangue: A
Coal gangue is a mixture of a variety of rock and mineral composition with low carbon content. Normally, its calorific value increases with the increase of carbon mass fraction and volatiles, in contrast, decreases with the increase of ash. Because of the high content of SiO 2 and Al 2 O 3, the ash melting point of coal gangue is quite high ...
Preparation, characteristics and mechanisms of the
Preparation procedure of composite sintered brick by iron ore tailing, coal gangue powder, sewage sludge and shale. To remove the water content, the brick body was dried at room temperature (20 ± 5) °C for 48 h and then put it in the oven at 105 °C for 24 h. Afterwards, it was sintered in a SX212-16A high temperature gradient muffle …
Utilization of coal gangue for the production of brick
This study proposed to produce high-strength thermal insulation bricks using coal gangue as the primary material and three other mineral powders as auxiliary …
Coal and Gangue Classification Based on Laser-Induced …
During the extraction and processing of coal, a large amount of solid waste, collectively known as gangue, is produced. This gangue has a low carbon content but a high ash content, accounting for approximately 15 to 20% of the total coal yield. Before coal is used, coal and gangue must be effectively separated to reduce the gangue …
Ecological Mortar from Recycled Composite Powder with Waste Clay Brick
Re cycled clay bricks and coal gangue wer e ground by a pla netary. ball mill i n the laboratory for 30 mins. Finally, CBP and CGP wer e sieve d by a 75µm sieve. Wavelength.
How to Make Clay Bricks with Coal Gangue?
Coal gangue is a kind of resource that can be utilized to replace clay to produce new coal gangue sintered hollow brick. It's an effective way of its comprehensive utilization. This …
The Environmental Geochemistry of Trace Elements and …
The main chemical compositions of coal gangue are SiO2, Al2O3, Fe2O3, and CaO, which occupies 58, 24, 7 and 5 wt.%, respectively. According to the basic requirements for brick materials reported ...
The Environmental Geochemistry of Trace Elements and …
The properties of coal gangue. The main chemical compositions of coal gangue are SiO 2, Al 2 O 3, Fe 2 O 3, and CaO, which occupies 58, 24, 7 and 5 wt.%, respectively.According to the basic requirements for brick materials reported by Raut et al 22, these coal gangue accumulated in Huainan Coalfield is a suitable raw materials for …
Using Chinese Coal Gangue as an Ecological Aggregate and …
Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development requirements. This paper reviews the properties and preparation methods of Chinese gangue aggregate, studies the influence of gangue …
CN213967068U
The utility model discloses a raw materials grinder of high efficiency gangue sintered hollow brick, including the host computer body, the inside fixed mounting of host computer body has broken organism, the inside fixed mounting of broken organism has broken cylinder, there is the broken blade of multiunit through pivot fixed mounting on broken …
Utilization of coal gangue for the production of brick
Abstract. Coal gangue, an industrial solid waste discarded from coal mining and processing, was used as the sole raw material to prepare brick. The coal gangue was crushed, homogenized, milled and ...
Utilizing original and activated coal gangue wastes as …
Coal gangue (CG) is a solid waste discharged in process of coal mining and washing, which accounts for 8–20 % by weight of the total coal output. ... Although part of CG powder has been used for highway roadbeds, brick, cement and concrete production, there are large amounts of CG leading to serious environment pollution [3], …
Fabrication and application of porous materials made from coal gangue …
Coal gangue (CG), which is mainly generated during coal excavation, mining, and coal washing, is an industrial solid waste that is recognized as an environmental pollutant. The ever-increasing amount of CG produced is a serious threat to the ecological environment and property safety, especially in China, which is the largest …
Materials | Free Full-Text | Newly Generated Ca-Feldspar …
This study proposed to produce high-strength thermal insulation bricks using coal gangue as the primary material and three other mineral powders as auxiliary …
[PDF] 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 …
Preparation and Properties of Sintered Brick Based on Coal …
For ratio of coal gangue and fly ash = 1:1, the sintered brick with compressive strength of 63.88 MPa, linear shrinkage of 8.84 %, porosity of 15.28 % and …
Brick De-airing Extruder – Xiangtan Weida Electrical
This new brick making machine is able to extruding clay bricks, flyash bricks, coal gangue bricks etc. Double stage brick extrude main technical parameters: Compact brick …
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 …
Nepheline‐based water‐permeable bricks from …
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 …