Gangue Crusher

Gangue sources:

Coal gangue is well under construction, open excavation, coal mining and coal washing process in the discharge of carbon rock and rock, is the construction of coal mines, coal production in the process emissions of solid waste in general.

Gangue of the following three main sources.

Generated when the rock tunneling gangue, commonly referred to as ore gangue, gangue accounted for 60% to 70%. Rocks are mudstone, shale, siltstone, sandstone, conglomerate, limestone and so on.
Mining process from the roof, floor, and caught in the seam where the resulting laminated rock gangue, accounting for 10% of coal waste to 30%. Rocks, including coal seam roof common mudstone, siltstone, sandstone and conglomerate; bottom of rocks, mostly coal mudstone, shale, claystone, siltstone; seam folder liver clay rock with rock, carbonaceous shale, siltstone, sandstone and so on.
Separation or washing of coal produced during the gangue, also known as washing waste rock, about 5% gangue. The main coal seams in the various folders from the stone, such as kaolinite, clay rock, pyrite and other components.

Gangue classification:

The classification of coal gangue gangue classification and naming is not only a coal gangue comprehensive utilization of the basic work, but also a more integrated work.

Gangue components around the complex, different physical and chemical properties, different ways of gangue gangue comprehensive utilization of the chemical composition and physical and chemical characteristics not the same.

For the gangue in a scientific and rational classification of resources to promote the utilization of coal gangue has very important theoretical and practical significance, mainly reflected in the maximum of the coal waste to make the best use, based on the use of means are classified on the pile of coal gangue , to explore the high value-added use of coal gangue and its long-term development of technical means to provide decision-making basis.

Named on the classification of coal waste, since there is no system at home and abroad, complete and coherent program, mostly based on certain characteristics of different researchers to make their own classification criteria. Classification and naming scheme gangue many, the most simple and most commonly used is to classify the origin of coal gangue. For example, Jiangxi gangue, Xuzhou coal gangue and so on.

Coal production sector classification is used to name the color, such as black gangue, gangue gray, white gangue, gangue and other red; or output layer according to the classification of waste rock names, such as roof gangue, gangue with stone and so on.

Classification based on a common gangue by source, according to the natural state of existence, classifying, grading classification and classification by use of channels.

(1) by source according to the output means that the source of coal waste can wash into the gangue gangue, coal gangue, Lane, Rock Lane gangue, hand-selected and stripped gangue gangue, gangue and some research will have a spontaneous combustion by source classification category.

Wash the gangue from coal washing process in the discharge of tailings washed gangue. Gangue of the displacement wash concentrate, fine-grained, higher heating value, higher content of clay minerals, carbon, sulfur and iron content is generally higher than other types of waste rock.
Coal mine waste rock in tunneling Lane process, all along the seam of mining, excavation works discharged gangue, gangue collectively roadway. Lane mainly by coal mining waste rock seam roof, and floor rock composed of laminated, often some of the carbon content and calorific value, and sometimes also contains a total of associated minerals.
Rock Lane in the coal gangue rock roadway construction and process which are not heading the project along the seam of coal waste discharges, referred to Rock Lane gangue. Rock Lane gangue rock types contained in complex emission is more concentrated, not its lower carbon content or carbon, so no heat value.
Hand-selected output of raw coal gangue mixed, ground in a mine or coal preparation plant is called by the manual hand-picked selection of gangue gangue. Refuse has a certain hand-selected size, less emissions, mainly from the coal seams of the partings, has some heating value, and coal mining were often associated with being picked.
Strip mining in the open air when coal gangue, coal overburden rock was stripped and discharged, referred to as stripping gangue. Its characteristics are contained in complex rock types, the carbon content is very low, generally no calorific value, the key is used to backfill mined-out area or made to fill the ditch, and some also contain associated gangue minerals stripped.

Gangue of use:

Gangue comprehensive utilization of domestic and international status of countries around the world attach great importance to the handling and use of coal gangue. Since the 1960s began, the comprehensive utilization of coal gangue has caused a lot of national attention, to the 1970s, France, Germany and other countries of the gangue utilization reached 30% to 50%. Part of the mine gangue utilization has reached loo%. Britain’s coal gangue comprehensive utilization, especially for the thermoelectric energy conversion technologies introduced to the process of integration and application of a systematic study of other coal-producing countries, there are many technical staff involved in this area, carried out special research work. UK Coal Authority was established in 1970, coal waste management; Poland and Hungary have jointly established a Haier Alex gangue use of the company, these institutions specializing in the processing and utilization of coal gangue.

In recent years, more and more extensive use of coal gangue foreign production of building materials. Soviet Union in Donbass, Kuzbass, Karaganda region wide selection of coal gangue such as raw materials, semi-dry method using extrusion or forming solid or hollow brick production. According to the Soviet Union, Construction Engineering Research Institute report, the use of coal gangue brick, fuel consumption can be reduced by 80%, product cost reductions of 19% to 20%. Since the Sixth Five-Year Plan of China has been growing environmental awareness, coal industry every year a lot of manpower and financial resources for the management of waste dump, has also made some of the more mature experience.

So far, the digestion and utilization of waste rock of the main ways: (1) filling collapse area. Waste rock reclamation fill is an important way. The use of coal waste as filling material subsidence area, can consume large quantities of coal gangue, coal gangue of mine that can reduce the environmental pollution (water pollution, air pollution, environmental hygiene, etc.). Gangue crushing, processing and handling equipment: gangue rock processing equipment including: jaw crusher, impact crusher, cone crusher, impact crusher, magnetic screening machine, belt conveyor, vibrating screen and so on.