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Overview of coal gangue
Coal gangue is a solid waste discharged during coal mining and washing processes. It is a black gray rock with lower coal content and harder than coal. In recent years, the stock of coal gangue in China has reached as high as 1000Mt, and it is still being continuously discharged every year, with an emission amount of about 100Mt. The large amount of accumulated coal gangue not only occupies land resources, but also seriously pollutes the environment and may even cause natural fires, so it is urgent to deal with solid waste coal gangue.
The application of waste coal gangue
After being processed into sand, abandoned coal gangue can be used as sand and gravel aggregates in the infrastructure industry. In today's world where sand is scarce, the production of sand from solid waste coal gangue has received a lot of attention.
Feasibility of using coal gangue to produce sand
For coal gangue sand production, many users may have a question in their hearts: can the sand produced from coal gangue meet the requirements of building sand? The answer is completely possible. From the perspective of coal gangue itself, it is a brittle material that is easy to break and process. Its hardness value is around 3, and its compressive strength range is between 300-4700Pa. Long term production practice has shown that as long as the coal gangue is not excessively weathered, it can be crushed to produce sand. After being processed by professional sand making equipment, the finished product of coal gangue has uniform particles, good compression resistance and permeability, strong adhesion, and its mineral and chemical composition are basically consistent with commonly used mechanism sand. After sand making, it fully complies with the standard of GB/T 14684-2011 Building Sand and can be used to produce building materials such as coal gangue cement, coal gangue bricks, and lightweight concrete aggregates.
Coal gangue sand making equipment
To make sand from coal gangue more in line with sand standards and with better particle size, coal gangue sand making equipment is indispensable. There are two types of coal gangue sand production lines: fixed and mobile, and the main equipment used is as follows:
1. Fixed coal gangue sand making equipment
Fixed sand making equipment configuration: vibrating feeder+jaw crusher+impact crusher+sand making machine+vibrating screen+belt conveyor. Jaw crusher: mainly used for preliminary crushing; Counterattack crusher: used for further medium and fine crushing processing; Sand making machine: performs sand making and shaping; Vibration screen: screen the finished product; Belt conveyor: conveying materials.
Production process: The vibrating feeder continuously and uniformly feeds large pieces of abandoned coal gangue to the jaw crusher. The jaw crusher processes the coal gangue to a height of more than ten centimeters before discharging it outside the machine. Then, the conveyor sends it to the counter crusher for intermediate and fine crushing processing. After the secondary crushing is completed, it is discharged outside the counter crusher. The vibrating screen is used for screening and processing. If the particle size does not meet the requirements, it will be returned and crushed again. If it meets the requirements, it will be sent to the sand making machine for sand shaping, which can make the finished product particle shape more beautiful. The particle size of the finished product can be controlled below 5mm. Advantages: Fixed production lines are relatively more stable and have a larger output.
2. Mobile coal gangue sand making equipment
The mobile coal gangue sand making machine integrates feeding, crushing, screening, conveying and other processes, and one car is a production line. It can be directly driven to the site for crushing without the need for fixed installation of equipment. It can be started with just one click, saving time and effort in work. The later investment cost is low and the cost is fast, making it very suitable for solid waste coal gangue sand making processing.
The advantages and prospects of sand production
Nowadays, natural sand resources are scarce, and sand and gravel aggregates are scarce. Using waste coal gangue to make sand not only has low production costs, but also solves the problem of a large amount of coal gangue accumulation, alleviates the situation of "difficult to obtain one sand", protects the ecological environment, and receives strong support from the government. So, the way to make sand from solid waste coal gangue is limitless.
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Mobile crusher is a one-stop crushing equipment for stone crushing with flexibility and mobility, which is one of the indispensable equipments for modern construction, and is widely used in mines, construction sites, road construction and other fields.
At present, the domestic mechanism of sand technology is being updated and improved day by day, in response to market demand, research and development and production of cone sand making machine in the field of sand production has been widely used, known as pebble sand making tool.
Kaolin Raymond Mill is a high-tech skill grinding equipment, which can process raw materials into micron or nano-scale micro-powder, and has been widely used in various industries. Such as mining, building materials, chemical industry, metallurgy and other industries, can be limestone, calcite, barite, chemical raw materials, such as Moh's hardness is not greater than 7, humidity in the following 6% of more than 300 kinds of non-inflammable and explosive materials for grinding and processing, the finished product granularity of 30-800 mesh can be adjusted between.
Mobile crusher is a one-stop crushing equipment for stone crushing with flexibility and mobility, which is one of the indispensable equipments for modern construction, and is widely used in mines, construction sites, road construction and other fields.
At present, the domestic mechanism of sand technology is being updated and improved day by day, in response to market demand, research and development and production of cone sand making machine in the field of sand production has been widely used, known as pebble sand making tool.
Kaolin Raymond Mill is a high-tech skill grinding equipment, which can process raw materials into micron or nano-scale micro-powder, and has been widely used in various industries. Such as mining, building materials, chemical industry, metallurgy and other industries, can be limestone, calcite, barite, chemical raw materials, such as Moh's hardness is not greater than 7, humidity in the following 6% of more than 300 kinds of non-inflammable and explosive materials for grinding and processing, the finished product granularity of 30-800 mesh can be adjusted between.
Mobile crusher is a one-stop crushing equipment for stone crushing with flexibility and mobility, which is one of the indispensable equipments for modern construction, and is widely used in mines, construction sites, road construction and other fields.
At present, the domestic mechanism of sand technology is being updated and improved day by day, in response to market demand, research and development and production of cone sand making machine in the field of sand production has been widely used, known as pebble sand making tool.
Kaolin Raymond Mill is a high-tech skill grinding equipment, which can process raw materials into micron or nano-scale micro-powder, and has been widely used in various industries. Such as mining, building materials, chemical industry, metallurgy and other industries, can be limestone, calcite, barite, chemical raw materials, such as Moh's hardness is not greater than 7, humidity in the following 6% of more than 300 kinds of non-inflammable and explosive materials for grinding and processing, the finished product granularity of 30-800 mesh can be adjusted between.
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The rocks are harder because of there is iron ore inside. The project uses 600*130 vibrating feeder, PE1000*1200 jaw crusher, two HST300 single cylinder cone crusher two, two JYS1238 sand making machine, four vibrating screen, four sand washing machine, one sand recovery machine, capacity design is 300t/h.
This project is a sand making production line with an hourly output of 200 tons. The equipment used includes vibrating feeder, single cylinder cone crusher, multi-cylinder cone crusher, sand making machine, 4 vibrating screens, 4 sand washing machines and sand recovery&dehydration integrated machine.
The equipment aspect of this project includes PE870*1060 jaw crusher, PF1515 impact crusher, JYT5145 sand making machine and two 2470 vibrating screens. The equipment is used for limestone crushing and sand making. Shaanxi Province is rich in limestone resources and has many limestone aggregate plants, and this set of equipment from Jianye Company has good feedback in the local area.
The production line adopts the high-pressure mill and environmental protection equipment produced by Jianye Heavy Industry, using advanced grinding process technology to start the construction of an annual output of 50,000 tonnes of slag micro-powder production line project.
The user uses calcined petroleum coke to grind and make powder, and the finished coke powder is mainly used for processing graphite electrodes. In recent years, the price of coke powder rises, the user spends tens of millions of dollars to build a production line with an annual output of 60,000-100,000 tonnes of high-quality coke powder, which is the first phase of the project, using two sets of 6R4528 high-pressure grinding mills of Jianye Company.
The project is mainly used for grinding limestone, gypsum and other soft materials. The equipment chosen is Jianye 4528 grinding mill with a fineness of 200 mesh and a capacity of 12t/h.
Project configuration: Jaw Crusher PE900*1200, Cone Crusher HST315T, Vertical Shaft Impact Crusher VSI6X1263, Heavy Duty Vibrating Screen 2YKZ3080/3YKZ3080, Vibrating Feeder ZG1220Z/ZSW1360, Twin Screw Sand Washer 2XL1120, Bar Vibrating Feeder ZSW1360B, Bucket Wheel Sand Washing Machine DS4024, dewatering screen TS2450 many types of equipment. They will work together with the whole production line to crush and process the sand trap cobbles and mountain ores into natural sand, mechanism sand, and uniform material.
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