clay u0026amp coal gangue

The main chemical components of coal gangue are SiO 2, Al 2 O 3, and carbon, in addition to TiO 2, Fe 2 O 3, CaO, K 2 O, Na 2 O, etc. [12-14]. Its mineral components mainly include clay minerals (kaolinite, sericite), quartz, calcite, pyrite, siderite and carbo-naceous minerals [15, 16]. The most common and dominant clay mineral in coal gangue ...

Oct 30, 2017· Oct 30, 2017· Coal gangue is a solid waste discharged during coal mining and washing, the pozzolanic reactivity of which can be improve under appropriate activated method . The main mineral phases of kaolinite-based coal gangue is kaolinite. At present, research on geopolymer directly manufactured from coal gangue is extremely scarce.

Aug 16, 2020· Aug 16, 2020· 1. Introduction. With the rapidly increasing mechanization of the mining process and the continuously extending mining depth, raw coal resources have become increasingly scarce for the past few years, .As a result, the gangue minerals and fine-grained coal particles account for a quite large proportion of raw coal which corresponds to the improving requirements about high-ash fine coal ...

Coal gangue is a mixture of various mineral rocks that is co-occurred with the coal seam during the production process of coal preparation plant. Generally speaking, carbon clay rocks, sandstone, carbonate and aluminous rocks are the main components of coal gangue .

The utilization ratio of coal gangue, the ratio of the coal gangue with clay, mineralization agents, forming process and sintering process on the properties of the fabricated glass-ceramics were optimized. The utilization ratio of coal gangue reached 75, and the ratio of coal gangue to clay was 3/1, as an optimal property was observed. The

Jun 08, 2016· Jun 08, 2016· The LOI of the coal gangue reaches as high as 19.53 wt%, which is attributed to the high content of organic matter, as well as clay minerals, calcite, and dolomite in the coal gangue. Besides, the coal gangue has a calorific value ( Q gr,v,d ) of 3.01 MJ kg −1, determined according to Chinese National Standard GB/T 213-2008.

Aug 16, 2020· Aug 16, 2020· Montmorillonite (MMT) represented by 2:1 type and kaolinite represented by 1:1 type,, are the most common gangue minerals in coal processing plants. Clay minerals could deteriorate the coal flotation efficiency and target index slime coating,,, mechanical entrainment,,, etc., thus leading to low flotation recovery and bad concentrate grade.

ing coal gangue and clay. This work optimized the many processing parameters including the rate of using coal gangue, coal gangue to clay ratio, mineralizers, and process of forming and sintering. Using coal gangue of 75% and coal gangue to clay ratio of 3/1 made the mechanical properties optimal.

Coal gangue, which has a similar composition to clay [5], is a solid waste produced during coal mining and processing [6–10], and its annual production accounts for about 10% to 15% of the coal output in that year [6,7,11]. Fresh undisturbed coal gangue does not have pozzolanic activity [9],

May 08, 2015· May 08, 2015· Abstract. Coal gangue and clay shale usually contain more than 70 % SiO 2 and Al 2 O 3, which have potential pozzolanic activity when calcined at suitable temperature.In this study, the feasibility of utilizing calcined coal gangue and clay shale in the production of multiple cementitious materials was assessed under the condition of no cement clinker.

1. Introduction. Coal has been the primary energy source in China for decades .The annual production of coal in China alone reached 38 billion tons in 2015, accounting for about 47% of global production .For one ton of coal produced, about 100–150 kg of coal gangue is generated from coal excavation, mining and washing processes .Usually, coal gangue is discharged on site (occupying 150 km 2 ...

Then, slag can be used for slag brick and slag cement production. (3) To produce building materials Using coal gangue for brick production instead of clay as a raw material, by this way, can reduce fertile land dig. By making use of coal gangue own fuel, you can save coal …

Then, slag can be used for slag brick and slag cement production. (3) To produce building materials Using coal gangue for brick production instead of clay as a raw material, by this way, can reduce fertile land dig. By making use of coal gangue own fuel, you can save coal on the process of brick burning.

Qiu et al. (2011), studied on the utilisation of Coal Gangue and Copper Tailings as Clay for Cement Clinker Calcinations. They explained that, qualified cement clinker can be burnt out when taking ...

Jan 04, 2016· This is the raw material for brick making, clay and coal gangue. The next step will be raw material crushing and mixing.See more at

Jan 01, 2014· Jan 01, 2014· Coal gangue is the by-product of coal mining. The average production of coal gangue is approximately 10–15% of raw coal production in China, depended on mining and geological conditions (Liu and Liu, 2010). Due to the high content of clay minerals and carbon, coal gangue could also be a valuable resource.

clay and coal gangue) are shown in Fig. 1. From Fig. 1 a, the main phase of calcined flint clay is donbassite, kaolinite, CaAl 8 Fe 4 O 19 and Ca-Al-Si-O, while it can be found in Fig. 1 bthat coal gangue mainly contains quartz, kaolinite, muscovite and dolomite. a b Fig. 1. XRD patterns of the raw materials: a – calcined flint clay; b ...