Gangue Ground

in three steps: first, the raw coal gangue was ground for a few . minutes in a planetary mill at 600 r/min with a laborator y . grinder, and the resulting particles were sieved to obtain sizes .

In the traditional view, supergene ore and gangue minerals are the products of reactions between hypogene sulfide minerals and descending, acidic meteoric waters; these processes take place at or near the ground surface in subaerial environments (Guilbert and Park, 1986). In VMS deposits, copper and other metals are mobilized from primary massive

In conclusion, coal gangue coverage significantly improves the properties of soil, enhances enzyme activity, and promotes ryegrass growth. ... both above and below ground. The dotted line plots ...

Injecting coal gangue into goaf in the form of slurry can effectively solve the problems of ground stacking and environmental pollution prevention. In order to obtain the flow law of gangue slurry in the void of the accumulated rock in the goaf, a visualization simulation test device for gangue slurry permeation grouting in the goaf was ...

The research aims to innovate an efficient underground disposal model for gangue, contributing to the refinement of the technical system for the comprehensive disposal …

Gangue, produced from coal mining and washing process, is a serious threat to the ground environment. Gangue backfilling mining method can solve this problem and reduce …

A precise slurry system was established on the ground to produce a slurry of coal gangue, water, and additives with a certain mass fraction. Then, the gangue slurry was transported through a pipeline system and high-pressure injection to fill the space behind the working face, thereby achieving the disposal of coal gangue in an environmentally ...

study, coal gangue (CG) blended with ground granulated blast furnace slag (GGBFS) was used to prepare AAMs. The research focused on analyzing the effects of the GGBFS content and alkali

Gangue is generally an unwanted material or impurity that is present in an ore. This can be found in ore deposits where the mineral is present. During the process of extraction, these impurities are mixed up with ore in the form of stone, sand, rock, etc. The gangue must be separated from the mineral with the help of ore dressing or mineral ...

All the CGs in the figure are dried in an oven at 60 °C and ground. CG1 is Hebei coal gangue, which comes from a coal gangue processing plant in Xingtai, Hebei Province. It is brownish black powder after drying and grinding. CG2 is Shanxi coal gangue, from Shanxi Geology Group Co., Ltd. After treatment, the color is black and gray, CG3 is ...

The Current Status of Coal Gangue Discharge on the Ground in China Coal gangue, as a solid waste generated during coal mining and washing, is a black-

Abstract: By reutilizing industrial byproducts, inorganic cementitious alkali-activated materials (AAMs) contribute to reduced energy consumption and carbon dioxide (CO2) emissions. In this study, coal gangue (CG) blended with ground granulated blast furnace slag (GGBFS) was used to prepare AAMs. The research focused on analyzing the effects of the GGBFS content …

The successful validation of underground gangue slurry backfilling technology demonstrated its feasibility and the correctness of the theoretical approach.

To eliminate the adverse impact of coal gangue on the ecological environment and human health, extensive research and practical investigations have been conducted on the comprehensive utilization methods of coal gangue. In terms of ground treatment methods of coal gangue, Zhao et al. [4] proposed the application of coal gangue in power generation.

Visual insights into surface destruction differences of the large flake graphite ground with gangue minerals. Author links open overlay panel Nailing Wang a, Xinyang Xu a, Zhitao Yuan a ... to improve the dissociation degree of flake graphite [14], [15]. While the dissociated gangue minerals such as quartz and feldspar with high hardness will ...

The coal gangue was supplied by Guangxi Bureau of Coal Geology, Guangxi, China. The coal gangue was smashed to pieces by a crusher and ground into particles in a ball mill, …

AMA Style. Wang X, Liu F, Li L, Chen W, Cong X, Yu T, Zhang B. Study on the Compressive Strength and Reaction Mechanism of Alkali-Activated Geopolymer Materials Using Coal Gangue and Ground Granulated Blast Furnace Slag.

The accumulation of coal gangue not only occupies a vast amount of land but also poses a serious threat to the ecological environment [19, 20]. However, coal gangue contains abundant aluminosilicate components, such as Al 2 O 3 and SiO 2, which have the potential to be used as raw materials for alkali-activated cementitious materials [[21], [22 ...

Coal gangue-slag geopolymer is a kind of environment-friendly material with excellent engineering performance and is formed from coal gangue and slag after excitation by an alkaline activator.

First, we collect samples of coal, gangue, and other objects from the Shenhua Baori Xile coal mine, and then measure the ground measured spectral reflectance data of these samples. For satellite data, we remove the interference information of the reflectance spectra from these images and established a relationship with the ground measured data.

Coal gangue was firstly crushed, dried, ground for 30 min, and then thermally activated by microwave. Their findings showed that by using the activated coal gangue powder, cement hydration was modified, and mortars with 70 % cement and 30 % coal gangue powder with temperatures 600–700 ℃ developed the highest compressive strength.

DOI: 10.17756/nwj.2023-s2-003 Corpus ID: 264906344; Effect of Alkali-activation on Elaboration of a Binder Based on Ground Coal Gangue @article{Moussadik2023EffectOA, title={Effect of Alkali-activation on Elaboration of a Binder Based on Ground Coal Gangue}, author={Azzedine Moussadik and Fatima Ouzoun and H. Agourrame and Hassan Ez - zaki …

The process begins with the crushing and grinding of the ore to liberate copper minerals from the gangue. The ground ore is then mixed with water and flotation reagents, such as collectors, frothers, and modifiers, in a conditioning tank. Collectors make the copper minerals hydrophobic, allowing them to attach to air bubbles introduced in the ...

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...

The above-ground dry weight (ADW) and below-ground dry weight (UDW) of ryegrass showed similar trends under various gangue cover treatments, consistent with the patterns observed in above-ground fresh weight (AFW) and below-ground fresh weight (UFW). For gangue particle sizes S1, S2, and S3, the ADW of ryegrass under cover thicknesses T2 …

The source of coal gangue in the coal mine includes the ground-washed gangue, the ground gangue dump, the underground sorted gangue, and the underground tunneled …

This paper aims to examine the effect of coal gangue aggregate (CGA), fly ash (FA), and ground-granulated blast slag (GGBS) on the rheological, mechanical and microstructure properties of concrete.

To enhance its reactivity, the coal gangue was ground. The preparation steps for the spontaneous combustion coal gangue powder involved crushing the material, passing it through a 20-mesh sieve (denoted as grinding for 0 min), and then grinding it in a planetary ball mill for 5, 15, 25, 35, 45, and 55 min at a speed of 350 rpm.

After being crushed by the jaw crusher, the small ball of coal gangue was ground to a surface area of 400 m 2 /kg, and then the coal gangue was calcined in the constant temperatures of 500 °C, 600 °C, 700 °C, 800 °C and 900 °C for 2 h and rapidly cooled to room temperature. The grade S95 ...

the ground gangue hill, and the pulp ing system and pumpin g system are arranged in 301 a uxiliary transportation . lane (303 return air lane). e test p rocess is shown in Fig. ...