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Experimental study of the effects of stacking modes

2019-3-1  Generally speaking, coal gangue normally contains pyrite, and approximately 15% residue coal or other organics, which provide the preconditions for spontaneous combustion (Finkelman, 2004). As a type of artificial structure, the coal gangue hills often have large internal voids due to loose and chaotic piling methods (Hao and Zhang, 1992).

Characterization of Heavy Metals from Coal Gangue

Coal gangue, a residue obtained during the coal mining process, accounts for 10–15% of raw coal produced. Usually, this coal gangue is transported and stacked loosely in the nearby areas. Long term piling up of this mine waste can volatilize large amounts of potentially toxic heavy metals which have the ability to infiltrate surrounding

(PDF) Study on the spatial distribution regularities of

and some human factors such as new coal gangue piling up steadily, some physical-chemica l properties of the surface soil in accumulation areas of coal gangue has changed. F or example, the

Phosphate Removal from Secondary Effluents Using

Coal gangue is one of the major solid wastes produced as a result of coal mining and its washing. Generally, the total discharge capacity of coal gangue can reach up to 10–15% of the total raw coal extraction .In China, approximately 315 million tons of coal gangue is produced on annual basis, with a total piling of about 4.5 billion tons .

Phosphate Removal from Secondary Effluents Using Coal

2019-4-26  Coal gangue is one of the major solid wastes produced as a result of coal mining and its washing. Generally, the total discharge capacity of coal gangue can reach up to 10–15% of the total raw coal extraction [10]. In China, approximately 315 million tons of coal gangue is produced on annual basis, with a total piling of about 4.5 billion

Soil characterization and differential patterns of heavy

2018-6-19  contains seven coal gangue piles, covering an area of ap-proximately 25,695 m2, and two loess terraces, covering an area of approximately 3700 m2. The average height of coal gangue piles is 36 m. In some regions where the slopes are greater than the natural repose angle, collapse and soil erosion frequently occur. Coal gangue is piled

Overview of Solid Backfilling Technology Based on

China is the world’s largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure.

AnExperimentalInvestigationontheMechanicalPropertiesof

2019-7-30  e gangue backfilling GER (Figure 1(b)) is an innovative stability, such as timber cribs, dense pillar, gangue piling, andmasonrywalls[20,21].However,duetoissuesincluding low support force, large deformation, poor gob isolation, Coal gangue is a concrete material utilizing gangues as

Mercury emission from spontaneously ignited coal

2016-10-15  The coal-washing process is to sieve coal from ash and gangue using flotation, gravity concentration, etc. Due to the heavy mass, mercury tends to accumulate in the gangue and other solid wastes, with a previous study suggests that coal-washing

Enrichment of heavy metals in coal gangue by puff

Coal gangue with/without wild puff balls growing on or covering up were analyzed by means of inductively coupled plasma atomic emission spectrometry (ICP-AES) and atomic fluorescence spectrometry (AFS) to detect the contents of heavy metal elements in the plants. Seven heavy metals were chosen to do the experiments, which showed that the puff balls have strong enrichment capacity for heavy

Co-utilization of spent pot-lining and coal gangue by

2018-12-10  1. Introduction. Spent pot-lining (SPL) is a poisonous and harmful waste solid resulting from aluminum electrolysis (Sajwani, 2017).In terms of production and consumption, aluminum is the largest non-ferrous metal worldwide (Holywell and Breault, 2013).Moreover, Hall–Héroult molten salt electrolysis is the only method used in modern aluminum production (Haverkamp, 2011), however, after 5

Mercury emission from spontaneously ignited coal

2016-10-15  The coal-washing process is to sieve coal from ash and gangue using flotation, gravity concentration, etc. Due to the heavy mass, mercury tends to accumulate in the gangue and other solid wastes, with a previous study suggests that coal-washing process can remove 50–60% of mercury in raw coal,.

Overview of Solid Backfilling Technology Based on

China is the world’s largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure.

AnExperimentalInvestigationontheMechanicalPropertiesof

2019-7-30  e gangue backfilling GER (Figure 1(b)) is an innovative stability, such as timber cribs, dense pillar, gangue piling, andmasonrywalls[20,21].However,duetoissuesincluding low support force, large deformation, poor gob isolation, Coal gangue is a concrete material utilizing gangues as

(文献)煤矸石的综合利用现状的研究.kdh_百度文库

2013-8-4  The piling of coal gangue takes up a lot of land and causes serious environmental problems. The source and basic properties of coal gangue is analyzed and the present situation of comprehensive utilization of coal gangue is described in this paper. Key words:

An Experimental Investigation on the Mechanical

After mixing the coal gangue and cement with water, Ca(OH) 2 produced by the hydration of the calcareous material had a secondary reaction with the active SiO 2 and Al 2 O 3 in the coal gangue, forming the stable water-insoluble hydrated calcium silicate gel and hydrated calcium aluminate gel. The cross reaction, joint production, and mutual

矸石山粒径分布及其渗透的非均匀性研究分析.pdf文档全文免费

2015-9-7  矸石山粒径分布及其渗透的非均匀性研究分析.pdf,致 谢 两年半的硕士研究生学习转眼即逝,在本论文即将完成之际,谨向我的 导师崔乃鑫教授致以最诚挚的谢意,崔老师优秀的做人品质,一丝不苟的工 作态度和执着的敬业精神,激励着学生在今后的学习和生活中不断攀登。

广东省人民政府法制办公室 gd.gov

2012-3-20  In the storage and piling of coal, gangue, coal cinder, coal ashes, sandstone, lime soil or other materials easy to produce dusts, enclosure, covering and other measures shall be adopted to prevent and control dust pollution.

我国矿山固体废物的资源化利用及处置_张利珍_图文_百度文库

2012-7-23  Serial No. 522 October. 2012 ·综合述评· 现代矿业 MORDEN MINING 总 第 522 期 2012年 10 月第 10 期 我国矿山固体废物的资源化利用及处置* 张利珍1,2 赵恒勤1,2 马化龙1,2 谭秀民1,2 张 耀1,2 ( 1.

China Communications construction company Ltd.

2018-2-1  Normalized construction method of coal gangue filling roadbed construction . China First Highway Engineering Co., Ltd. 18. YJGF237-2006. Normalized construction method of cement stabilization regeneration mixed material base layer. CCCC Second Highway Engineering Co.,

Overview of Solid Backfilling Technology Based on

China is the world’s largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure.

Domestic best coal gangue crusher

CONE CRUSHER. A cone crusher is similar in operation to a gyratory crusher, with less steepness in the crushing chamber and more of a parallel zone between crushing zones.

AnExperimentalInvestigationontheMechanicalPropertiesof

2019-7-30  e gangue backfilling GER (Figure 1(b)) is an innovative stability, such as timber cribs, dense pillar, gangue piling, andmasonrywalls[20,21].However,duetoissuesincluding low support force, large deformation, poor gob isolation, Coal gangue is a concrete material utilizing gangues as

永定河上覆水、间隙水和沉积物中重金属的分布特征 RCEES

2016-6-14  LIAO S H, DU Y L, LIU Z H, et al. The pollution characteristics and risk assessment of heavy metals in gangue piling site to surrounding soil[J]. Environmental Engineering, 2014, 32(8):118-120(in Chinese). [26] 杨建,陈家军,王心义. 煤矸石堆周围土壤重

Gangue definition of gangue by Medical dictionary

tailings: Residual gamma-radiation-rich, sandy waste remaining after extraction of uranium from mined ore.

An Experimental Investigation on the Mechanical

2018-1-1  After mixing the coal gangue and cement with water, Ca[(OH).sub.2] produced by the hydration of the calcareous material had a secondary reaction with the active Si[O.sub.2] and [Al.sub.2][O.sub.3] in the coal gangue, forming the stable water-insoluble hydrated calcium silicate gel and hydrated calcium aluminate gel.

岩土工程英语词汇A-R_竹子的专栏-CSDN博客

2017-11-9  coal gangue 煤矿石 coal tar epoxy 煤焦油环氧树脂 coarse aggregate 粗粒料 coarse ash tuff 粗粒凝灰岩 coarse fraction content 粗粒组含份量 coarse grained soil 粗粒土 coarse particle 粗粒,粗颗粒 coarse sand 粗砂 coastal habitat 海岸栖息地 coastline 海岸线

我国矿山固体废物的资源化利用及处置_张利珍_图文_百度文库

2012-7-23  Serial No. 522 October. 2012 ·综合述评· 现代矿业 MORDEN MINING 总 第 522 期 2012年 10 月第 10 期 我国矿山固体废物的资源化利用及处置* 张利珍1,2 赵恒勤1,2 马化龙1,2 谭秀民1,2 张 耀1,2 ( 1.

Mine Waste Transfer and Disposal Methods Mine

EDDY Pump partnered with UAT Pacific and is now able to offer a complete dredging solution for effective slurry, sludge, and solids removal, the Dredge Sled.With the latest technology, the Dredge Sled is a cost-effective solution for your pond, lagoon, canal, mine tailings pond, and settling tank cleaning. The Dredge Sled is a simple, efficient and easy to use alternative to more complicated