High-quality Coal Sludge Dryer, Coal Sludge Drying Machine

Changzhou Haomai Drying Engineering Co., Ltd. is a comprehensive enterprise integrating design, production, installation, commissioning, and service. The company primarily manufactures spray dryers, sludge dryers, belt dryers, and other equipment. With years of experience in production and design, as well as the introduction of advanced foreign technologies, the company has successfully achieved top-tier domestic standards in drying equipment technology through over a decade of dedicated research and development. Its products are widely favored across various industries. The company maintains sample machines on-site year-round, and you are welcome to come and test materials.Contact Number: 0519-88905668, Manager Zhang: 13706******

Definition of coal slime:
Coal slime generally refers to a semi-solid substance formed by coal powder containing water. It is a product of the coal production process. Depending on the variety and formation mechanism, its properties vary significantly, as does its usability. With numerous types, it has a wide range of applications.
Roughly, there are the following types: flotation tailings from coking coal preparation plants, coal slurry produced from coal-water mixtures, coal slurry carried by mine drainage, and coal slurry washed down from gangue piles by watering.
Characteristics of coal slime:
1. Fine particle size with a high content of fine particles, especially those smaller than 200 mesh, accounting for approximately 70% to 90%. 2. Strong water retention and high moisture content. The moisture content of coal slime dewatered by a disc vacuum filter is generally above 30%; that dewatered by a drum filter is between 26% and 29%; and that dewatered by a filter press is between 20% and 24%. 3. High ash content and relatively low calorific value. Based on ash content and calorific value, coal slime can be classified into three categories: low-ash coal slime with an ash content of 20% to 32% and a calorific value of 12.5 to 20 MJ/kg; medium-ash coal slime with an ash content of 30% to 55% and a calorific value of 8.4 to 12.5 MJ/kg; and high-ash coal slime with an ash content >55% and a calorific value of 3.5 to 6.3 MJ/kg. 4. High viscosity. Due to the presence of a significant amount of clay minerals, combined with high moisture content and fine particle size, most coal slime is highly viscous, and some even exhibit a certain degree of fluidity. These characteristics make the stacking, storage, and transportation of coal slime quite difficult. Particularly during stacking, its form is highly unstable, as it is easily washed away by water and dispersed by wind when dried. This not only wastes valuable coal resources but also causes severe environmental pollution, sometimes even disrupting the normal production of coal washing plants, making it a challenging issue for coal preparation plants.

Value of Drying Coal Slime:
With the continuous advancement of China's industrial technology, residual coal slime has been effectively repurposed. The coal slime dryer adopts a new technology that first crushes and disperses the coal slime before thermal drying, enabling continuous, industrial, and automated processing of coal slime. After treatment with the coal slime drying process, the moisture content of the coal slime can be reduced from 25%–28% to approximately 12%. By incorporating pre-crushing, dispersion, breaking, and anti-adhesion steps into the coal slime drying process, the drying efficiency has been significantly improved, injecting new vitality into the coal slime drying industry.

After drying treatment, coal slime can be primarily used in the following aspects:

1. Processing coal slime into briquettes as raw material for industrial boilers or residential use.

2. As a fuel for the power plant casting industry, it improves fuel utilization efficiency, reduces production costs, and enhances economic benefits.

3. As an additive in brick factories, it improves the hardness and compressive strength of bricks.

4. Used as an additive in cement plants to improve cement performance;

5. Coal slime containing certain specific components can be used as chemical raw materials.

Working Principle of Coal Slime Dryer:
The coal slime dryer can perform unit operations such as drying, cooling, heating, sterilization, reaction, and low-temperature combustion. The specially designed wedge-shaped stirring heat transfer blades in the equipment offer high heat transfer efficiency and a self-cleaning function for the heat transfer surface. The hollow shaft is densely arranged with wedge-shaped hollow blades, through which the heat medium flows via the hollow shaft. The heat transfer area per unit effective volume is substantial, with the heat medium temperature ranging from 40 to 320 degrees Celsius. The medium can be steam or liquid types, such as hot water or thermal oil. Indirect conduction heating is employed, with no heat loss from air being carried away; all heat is used to heat the material. Heat loss is limited to dissipation through the insulation layer to the environment. The wedge-shaped blade heat transfer surface features a self-cleaning function. The relative motion between material particles and the wedge-shaped surface creates a scrubbing effect, which removes any material adhering to the wedge-shaped surface, ensuring the heat transfer surface remains clean during operation. The blade dryer casing is Ω-shaped, typically housing two to four hollow stirring shafts. The casing includes a sealing end and a top cover to prevent material dust from escaping and to ensure optimal performance. The heat medium flows through the rotary joint, the casing jacket, and the hollow stirring shafts. The hollow stirring shafts have different internal structures depending on the type of heat medium to ensure the best heat transfer effect.
Characteristics of Coal Sludge Dryer:
1. The material retention time is adjustable, allowing for the processing of high-moisture materials as well as achieving extremely low-moisture materials.
2. Typical conduction drying method, energy-saving, high conduction coefficient, and high thermal efficiency;
3. Since all the required heat is supplied by the hollow blades and jacket, a small amount of hot air is supplemented to reduce exhaust humidity. Dust entrainment is low, and the exhaust gas is easy to handle, requiring no auxiliary equipment such as dust removal.
4. The blades are self-cleaning. The blades rotate toward each other, and the two inclined surfaces of the blades repeatedly stir, compress, relax, and propel the material, giving the blades a unique self-cleaning capability. The heating surface is continuously renewed, which also makes the heat transfer coefficient of the paddle dryer higher than that of any other conductive drying method. The above content is compiled based on issues encountered by trainees in their actual work and is provided for reference. For more details on coal sludge dryers, please call the technical hotline:Manager Zhang 13906112721
Coal Sludge Dryer











MoreCoal Sludge DryerFor details, please consult our company.Contact Number: 0519-88905668, Manager Zhang: 13706******

The coal slurry dryer, coal slurry drying machine, and coal slurry-specific drum scraper dryer produced by Haomai come with lifetime maintenance, free installation and commissioning, and operator training upon purchase. With detailed equipment processes, it is your **best choice**. For more details, please call 13616112988.