Reactivity activation of waste coal gangue and its impact …

2020-2-20 · In the construction field, coal gangue has also been used to make bricks, concrete blocks, mosaics, fired-glazed floor tiles, lightweight aggregate and other low value-added building materials,, .At present, coal gangue can partly or completely replace clay for aluminum adjustment in cement clinker production, . In fact, the major concern of using coal gangue in …

Influence of coal gangue mulching with various …

2021-7-28 · Coal 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 ...

Preparation and characterization of coal gangue …

2018-10-30 · The mass loss was used as the non-evaporable water content of coal gangue geopolymers specimens. The non-evaporable water content was calculated in accordance with Formula (1). (1) W ne = W 0 - W 1 / W 0 where. W 0 —mass of specimen after heating at 105 °C (g), W 1 —mass of specimen after heating at 900 °C (g). 2.3.4.

Selenium in Chinese coal gangue: Distribution, availability, …

2019-10-1 · In recent decades, extensive studies have been conducted on the concentrations of PHEs in coal gangue and their environmental impacts (Guo, 2018; Hao et al., 2008; Liu et al., 2001,; Querol et al., 2008; Sheng et al., 2016; Yang and Ji, 2016).However, systematic research on the potentially useful elements in Chinese coal gangue is still lacking, including research on …

Study on the mechanical behavior and micro-mechanism …

Coal gangue blocks were obtained from the Zhang Shuang Lou mine in Xuzhou, Jiangsu Province, China. As shown in Fig. 1(a), after being crushed by a jaw crusher and sieved through a vibrating screen, CGCAs with a continuous gradation of 4.75–20 mm and CGFAs with particle sizes of 0.15–4.75 mm were obtained. The chemical composition of the coal gangue, as …

Utilization of coal gangue for the production of brick

2016-6-8 · 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 ...

Coal gangue detection and recognition algorithm based …

2021-9-8 · 4.1 Design and implementation of coal gangue detection and recognition device. This study proposes an method for coal gangue detection and recognition on the basis of the DCN-YOLOv3 algorithm. Firstly, the method collects real-time video images of a conveyor belt operation through an industrial camera erected perpendicular to the conveyor belt.

How To Effectively Use Coal Gangue?

2021-10-13 · There 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.

coal-gangue

Introduction of 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 along with coal seam. Gangue could be found in roof, bottom board, inter-layer, and it could be selected in washing process.

Reutilisation of coal gangue and fly ash as underground …

2020-5-1 · The coal gangue and fly ash used in the experiments were collected from a gangue dump and a power plant in the Coal Mine, respectively. In practical applications, due to the limitations of the backfill process and equipment, only gangue with a particle size of 50 mm or less is generally used for backfill (Li et al., 2017, Li et al., 2017). ...