Analysis of physical and chemical properties of coal gangue lling materials The coal gangue used in this paper comes from the Daliuta coal mine in Shenmu, Shaanxi, and is crushed by EP-3B jaw crusher and screened by S49-B series rotary vibrat-ing screen. Take the particle size of 5 ~ 20 mm for coarse aggregate, 0.075 ~ 5 mm for ne …

4.4 Jaw Crusher Capacity Estimation. The capacity of jaw crushers is a measure of the mass or volume of crushed material produced in unit time of operation. The capacity is primarily a function of: 1. crusher design characteristics such as width and depth of the crushing chamber, 2. open and closed side settings, 3.

The natural moisture content of coal gangue calculated after oven drying the sample was in the range of 2–5%. ... Mehta PK (2002) High-performance high-volume fly ash concrete. Marquardt Ltd., Ottawa ... Qin Q, Hu SJ, Wu KN (2016) A concrete material with waste coal gangue and fly ash used for farmland drainage in high …

The backfill of coal mines with waste rock material and gangue can mitigate many of these environmental concerns. However, familiar recycling and utilization methods, such as using a coal gangue for power generation and brick fabrication, do not use sufficient volumes of waste that has accumulated on the surface at mine sites [9,10,11]. …

The research into the road performance of coal gangue is of great significance for the consumption of coal gangue and reducing pollution. In this paper, the coal gangues were prepared by separation and crushing processes, and their gradations were also optimized. Aiming to identify the possible problems of coal gangue as a …

Hammer Crusher: This is a type of crusher that is designed to crush materials with a high moisture content, such as coal and clay. It has a high reduction ratio and a low power consumption, which ...

The raw coal of large particle size and high hardness contains a large amount of vermiculite. The raw coal is first crushed to below 300mm by the jaw crusher, and then crushed to below 70mm by a toothed roller crusher, and then transported to the coal storage bin by the belt conveyor. After screening, the final product of 25~70mm is …

Semi-wet material crusher in 2019. Semi-wet material crusher is useful in the crushing of high moisture material, like bio-organic compost fertilizer, grass mud carbon, rural straw waste, and poultry dropping, etc. Our professional researchers and engineers with years of experience of research and development produce high output semi-wet ...

Compound sand making machine is mainly suitable for processing limestone, coal and other raw materials with a compressive strength below 140 MPa and humidity under 15%. A single sand making machine can produce sand, which is suitable for small scaled production plant. 2. Double Roller Sand Making Machine.

LINK. Hengtong Machinery is mainly engaged in hammer crusher and jaw crusher, which are used for crushing granite, limestone, river rock, basalt, diabase, ore tailings, construction waste, etc. It is widely used in concrete mixing plant, gravel plant, construction waste treatment plant and other places.

The coal gangue was taken from the driving face A503 of the Xinjiang Qiuci mine. The lithology of coal gangue was coarse sandstone. Based on the previous studies [11], [36], [44], the coal gangue was first broken into coarse aggregate by the jaw crusher and then the fine aggregate by the hammer crusher.Subsequently, the coal gangue sample was …

According to the material dosage in Table 4, mix it in a 30L horizontal concrete mixer for 3 min, pour the concrete into a 150 × 150 × 150 mm compressive test mold, put it into a concrete curing box for standard curing for 7d, and test its compressive strength [].Because the water absorption of coal gangue was not considered in the …

The coal gangue (CG) samples used in this study were collected from the Jinyang Coal Mine in Ordos, China (Figure1). The coal gangue was first broken by a crusher, and then filtered by a classifying screen to obtain a group of samples with a particle size of 9.5–16 mm. The basic physical and mechanical parameters

More About Crushers. August 20, 2023. Crushers are used to break up large pieces of rock and bulk materials. The size of the eventual pieces depends largely …

Coal Gangue Pulverizer Raymond Mill Finished product fineness: 80-325 mesh Production capacity: 1.5-100t/h It is suitable for the processing of more than 300 kinds of high-fine powder materials in non-flammable and explosive mineral, chemical, construction and other industries with Mohs hardness not greater than 7 and humidity …

This study examines the particle size and distribution of the main chemical components of gangue during the crushing process. Coal mine gangue was chosen as the research object, and its particle size and chemical components at various crusher discharge settings were examined through screening, grinding, chemical composition testing, and …

Abstract. It is well known and taken for granted that the efficiency of energy use by comminution (i.e. breaking, crushing, grinding) equipment is very low, typically less than 10%. Most of the ...

Crusher. A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can ...

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The double jaw crusher is designed for crushing hard materials, also quarried materials, sand and gravel, and recycling. [4, 5] crusher [4] The tie rod and compression spring ensure that the ...

Hammer crusher is mainly used for crushing medium-hard or brittle materials with hardness not more than 300Mpa and 15% moisture, such as coal, cement, gypsum, brick, tile, limestone, etc. It has the features of simple structure, big crushing ratio, high production efficiency, uniform particle size, etc.

China's total coal production in 2021 exceeded 4.13 billion tons, 52% of the world's total. Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly discharged on the ground surface as waste heaps, it occupies large areas of land and cause environmental pollution. This paper summarizes the …

The results show that the optimum content of hammer crushing of coal gangue through 3 mm sieve and cement is 83% and 17% of the total mass (W/W), respectively, the admixture content

A new type of paste filling material was created using fluorogypsum, a byproduct of hydrofluoric acid, as the raw material to address the issue of the filling material's high cost. The effects of five factors, including gangue, fly ash, fluorogypsum, lime content, and mass concentration on the physical and mechanical properties of filling …

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.

In this experiment, the influence of coal gangue as the admixture on the performance of dry-mixed mortar was studied, and the results were analyzed by XRD and SEM. The effects of different ways of crushing, particle size distribution, coal gangue, cement, admixture, and water content on the water retention, consistency, and 7 d …

In order to investigate the compaction and re-crushing characteristics of crushed coal gangue with different gradation, the compaction fractal test was carried out for crushed coal gangue with different Talbol power index n. The compaction deformation parameters such as displacement, stress-strain were analyzed according to the test …

The double stage hammer mill crusher can easily crush high-humidity materials such as coal gangue, shale, coal slag and other materials. Used as gangue and coal slag as additive and internal fuel for brick factory; using gangue and shale to produce standard brick and hollow brick.

Compaction characteristics. The compaction behavior of any geomaterial demonstrates its viability of its applications as an embankment or earthen dam. The optimum moisture content (OMC) and maximum dry density (MDD) of coal gangue were calculated for both the size fractions, i.e., 4.75 mm and 0.425 mm.