Contact Us

C o n t a c t U s

Synergic performance of low-kaolinite calcined coal

Coal gangue contains clay minerals and could be potentially used as a pozzolanic material after thermal activation up to 600 ~ 800 °C,,,,,. The reactivity of calcined coal gangue (CCG) is

Glass-ceramics fabricated by efficiently utilizing coal

2021-8-4  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.

煤矸石代替黏土生产水泥可行性分析

Samples were selected from 28 mines in 10 provinces to analyze the coal gangue characteristic in order to research the feasibility on the coal gangue generation of clay to product cement. Results show that the coal gangue has high ash, high sulfur content and low heat value.

Construction of isolation layers for preventing

2014-1-15  To improve the traditional direct soil cover methods of coal gangue dump treatments, a new isolation layer with fly ash and clay soil for preventing spontaneous combustion of a coal gangue dump was developed, which was placed as a cover on the surface of the coal gangue dump and before the topsoil covers. The study area of this research was a

A Mineral Used As A Refractory Gravel Mill

2020-11-20  6. Coal Gangue. The main mineral composition of coal gangue is kaolin, quartz, montmorillonite, feldspar, limestone, etc., and its main chemical components are SiO2 and Al2O3, followed by MgO, CaO, Fe2O3 and P and S compounds. The use of coal gangue can produce semi-silica, clay, high alumina (mullite), corundum and silicon carbide refractories

Synthesis and characterization of geopolymers derived

2019-5-10  The coal gangue and red mud based geopolymer showed a general increase in strength with increase in curing temperature. • At very high curing temperature (800 °C), the binary specimens of coal gangue and red mud showed much high strength values (up to 7.3 MPa) when compared to ternary mixes of coal gangue, fly ash and red mud. •

Products DEYI MACHINE

Sintered bricks: All bricks made of clay, shale, coal gangue or fly ash, which are molded and roasted at high temperature, are collectively referred to as sintered bricks.

武汉理工大学材料科学与工程学院欢迎您

2014-11-10  2)Preparation of Cementitious Materials without Clinker Using Coal Gangue and Clay Shale. Journal of WUT. 2013 NO.6 23-28 3)Research of Technological Parameter of Air-entrained Concrete Made of Phosphorus Tailing. Journal of WUT. 2013 NO.9 41-44.

赵计辉 中山大学土木工程学院 Sun Yat-sen University

Effect of mechanical grinding on physical and chemical characteristics of circulating fluidized bed fly ash from coal gangue power plant. Constr. Build. Mater. 2015, 101:851-860. (SCI, IF=4.419, 中科院 一区,Top 期刊)

Thermal decomposition of selected coal gangue

2017-9-20  TG-DTG-DSC. The thermal analysis curves of clay minerals could reflect the water contents, structural characteristics and crystal chemical characteristic changes in the clay minerals [9, 10].According to the thermogravimetric analysis–differential thermogravimetry–differential scanning calorimetry (TG-DTG-DSC) patterns (Fig. 1) of kaolinite-type coal gangue (sample 1 selected), the thermal

Clay bricks are made of clay including powders such as

Clay bricks are made of clay (including powders such as shale and coal gangue) as the main raw material, which is processed, shaped, dried, and roasted by the mud. During the Spring and Autumn Period and Warring States Period, China successively created square and rectangular bricks.

Study on Preparation of Coal Gangue-Based Geopolymer

2021-6-24  Coal gangue is the largest solid waste discharged and occupied in China. Most coal gangue contains clay minerals and has a similar chemical composition to clay, which can be used as raw materials for the preparation of geopolymer and geopolymer concrete [12, 13]. The alkaline solution is usually used as an activator for making geopolymer.

RECYCLING OF COAL GANGUE TO PREPARE LOW

2019-7-18  alumina content. Coal gangue is a hazardous by-product of the coal mining industry, and the average production of coal gangue is about 10 15 % of raw coal production [15]. The main composition of coal gangue is also SiO 2 and Al 2 O 3. The properties of ceramic proppants obtained by flint clay and coal gangue should be in some respects

Basic Characteristics of Coal Gangue in a Small-Scale

The accumulation/improper treatment of coal gangue will not only lead to waste of land, but also cause environmental pollution. Especially the impact of radioactive elements on the surrounding ecological environment is widely concerned by many scholars. In this study, the concentration of radioactive elements (uranium (U) and thorium (Th)) of small-scale coal gangue mining site and surrounding

Effect of Sintering Temperature on Property of Low

gangue can help to decrease the sintering temperature. Therefore, cheap flint clay and solid waste coal gangue can replace bauxite as raw materials of ceramic proppant. In this research, low-cost low-density ceramic proppant was successfully prepared by raw materials of calcined flint clay partially replaced by coal gangue.

The Environmental Geochemistry of Trace Elements and

2014-8-28  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

Products DEYI MACHINE

Sintered bricks: All bricks made of clay, shale, coal gangue or fly ash, which are molded and roasted at high temperature, are collectively referred to as sintered bricks.

赤泥-煤矸石基公路路面基层材料的耐久与环境性能 USTB

2018-1-11  Ji H P, Fang M H, Huang Z H, et al. Phase transformation of coal gangue by aluminothermic reduction nitridation:influence of sintering temperature and aluminum content. Appl Clay Sci, 2014, 101:94 [7] Liu X M, Li Y, Sun H H, et al. Effect of oil shale on Na

煤矿固废资源化利用的生态效率与碳减排——以淮北市为例

In this study, we take the novel wall materials (fly ash block, coal gangue brick) made from industrial solid wastes and conventional wall materials (clay brick, perforated clay bricks) made from clay in Huaibei City as examples to analyze the eco-efficiency and

Thermal decomposition of selected coal gangue

2017-9-20  TG-DTG-DSC. The thermal analysis curves of clay minerals could reflect the water contents, structural characteristics and crystal chemical characteristic changes in the clay minerals [9, 10].According to the thermogravimetric analysis–differential thermogravimetry–differential scanning calorimetry (TG-DTG-DSC) patterns (Fig. 1) of kaolinite-type coal gangue (sample 1 selected), the thermal

Mechanical Properties of Coal Gangue Used as Subgrade

In view to the gangue characteristic and the roadbed padding's essential requirements, the improving experiments for gangues mix the clay in four coal mines along the route to the Jidong highway Huojia section were carried out. It has been studied that the compaction test, the oedometric test, the California bearing test and the direct shear test for coal gangues mixed with clay and them in

RECYCLING OF COAL GANGUE TO PREPARE LOW

2019-7-18  alumina content. Coal gangue is a hazardous by-product of the coal mining industry, and the average production of coal gangue is about 10 15 % of raw coal production [15]. The main composition of coal gangue is also SiO 2 and Al 2 O 3. The properties of ceramic proppants obtained by flint clay and coal gangue should be in some respects

Study on Preparation of Coal Gangue-Based Geopolymer

2021-6-24  Coal gangue is the largest solid waste discharged and occupied in China. Most coal gangue contains clay minerals and has a similar chemical composition to clay, which can be used as raw materials for the preparation of geopolymer and geopolymer concrete [12, 13]. The alkaline solution is usually used as an activator for making geopolymer.

Basic Characteristics of Coal Gangue in a Small-Scale

The accumulation/improper treatment of coal gangue will not only lead to waste of land, but also cause environmental pollution. Especially the impact of radioactive elements on the surrounding ecological environment is widely concerned by many scholars. In this study, the concentration of radioactive elements (uranium (U) and thorium (Th)) of small-scale coal gangue mining site and surrounding

The Environmental Geochemistry of Trace Elements and

2014-8-28  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

(PDF) Power Generation from Coal Gangue in China:

Therefore, the heat generated by the combustion of coal gangue can be used for both power generation and heating. Generally, the loss on ignition is between 10% and 30%, and the calorific value

赤泥-煤矸石基公路路面基层材料的耐久与环境性能 USTB

2018-1-11  Ji H P, Fang M H, Huang Z H, et al. Phase transformation of coal gangue by aluminothermic reduction nitridation:influence of sintering temperature and aluminum content. Appl Clay Sci, 2014, 101:94 [7] Liu X M, Li Y, Sun H H, et al. Effect of oil shale on Na

煤矿固废资源化利用的生态效率与碳减排——以淮北市为例

In this study, we take the novel wall materials (fly ash block, coal gangue brick) made from industrial solid wastes and conventional wall materials (clay brick, perforated clay bricks) made from clay in Huaibei City as examples to analyze the eco-efficiency and

清华大学土木水利学院

2021-8-25  Wu H, Wen Q, Hu L*, et al. Feasibility study on the application of coal gangue as landfill liner material. Waste Management, 2017, 29: 161-171. 19. Wu H, Hu L*. Electro-osmotic Consolidation of Soil with Variable Compressibility, Hydraulic Conductivity and 20.