The mineral powder dryer is a drying equipment specially designed for powdered materials. Its main function is to effectively reduce the moisture content of mineral powder. The mineral powder dryer adopts advanced high-temperature rapid drying technology and maximizes thermal efficiency through the design of large heat transfer coefficient. The special scraping device inside the equipment effectively prevents materials from sticking to the wall, ensuring production continuity and stability. The equipment is mainly composed of rotating cylinder, induced draft equipment, high-speed disintegration equipment and other components, and can handle a variety of materials such as slag powder and limestone.
Efficient Powder Drying Solution
A MACHINE YOU CAN DEPEND ON!
Improve the quality of mineral powder and choose an efficient mineral powder dryer! Use advanced technology to ensure uniform drying, significantly reduce energy consumption.
The equipment is equipped with efficient dust removal systems, such as cyclone dust collectors and bag dust collectors, which effectively reduce the dust content in the exhaust gas and reduce the impact on the environment.
The mineral powder dryer reduces heat loss and energy consumption through optimized thermal efficiency and insulation design. At the same time, the equipment has a high degree of automation and simple maintenance, which effectively reduces the operation and maintenance costs.
The mineral powder dryer is equipped with special lifting plates and stirring devices, which can effectively disperse and lift the materials, so that the materials are fully in contact with the hot air flow, thereby greatly improving the drying efficiency. At the same time, these designs also avoid the phenomenon of material sticking to the wall and ensure the stability of equipment operation.
Model | ZJTL1000 | ZJTL1200 | ZJTL1500 | ZJTL2200 |
Feeding Screw Capacity | ≥800 kg/h | ≥1200 kg/h | ≥1800 kg/h | ≥3000 kg/h |
Dryer Moisture Evaporation | 350 kg/h | 650 kg/h | 900 kg/h | 1300 kg/h |
Drum Speed and Power | 3-4 rpm, 4 kW | 3-4 rpm, 5.5 kW | 3-4 rpm, 10 kW | 3-4 rpm, 15.5 kW |
Crushing Shaft Speed and Power | 150-250 rpm, 3 kW | 150-250 rpm, 4 kW | 150-250 rpm, 4 kW | 150-250 rpm, 5.5 kW |
Induced Draft Fan Power | 7.5 kW | 11 kW | 15 kW | 18.5 kW |
Coal Consumption (Standard Coal) | ≤70 kg/h | ≤110 kg/h | ≤170 kg/h | ≤220 kg/h |
Electricity Consumption | ≤10 kWh/hour | ≤15 kWh/hour | ≤20 kWh/hour | ≤30 kWh/hour |
Floor Area | ≥80 m² | ≥100 m² | ≥120 m² | ≥150 m² |
Building Height | ≥3.8 m | ≥4.2 m | ≥5.5 m | ≥5.5 m |
Dryer Weight | 5.5 T | 8.5 T | 15.5 T | 23.5 T |
QUALITY NEVER GOES OUT OF STYLE
Natural gas: Natural gas is one of the cleaner heat sources in the mineral powder drying process. It has a high calorific value, a combustion efficiency of more than 90%, and a short drying time. It is suitable for mineral powder drying processes that require precise temperature control. The unit energy consumption of drying equipment using natural gas as a heat source is about 1.8-2.2Nm³/ton of mineral powder. The operating cost is high, but the emission of pollutants is low. It is particularly suitable for projects with strict environmental protection requirements.
Coal:Coal is a traditional heat source with a relatively low calorific value but a low price. Therefore, it is widely used in mineral powder drying. The unit energy consumption of a dryer using coal as a heat source is about 45-55kg/ton of mineral powder. Although the combustion efficiency is only about 70%, it is still the first choice in large-scale production due to its low cost. However, the carbon dioxide and sulfur oxide pollution caused by coal combustion is relatively high, which is not suitable for projects with strict environmental protection requirements.
Electric heating:Electric heating is a highly flexible heat source and is suitable for small-scale mineral powder drying equipment. Electric heating can achieve precise temperature control, but it has high energy consumption, with electricity consumption of about 35-40kWh per ton of mineral powder, and high operating costs. Therefore, electric heating is usually used in scenarios with extremely high environmental requirements or small-batch production, such as high-value-added rare mineral powder.
High-humidity mineral powder (such as mineral powder with a water content of more than 20%) presents great challenges in the drying process, and ordinary single-stage heating methods cannot quickly dehydrate. For this reason, the use of multi-stage heating and airflow-assisted drying technology can significantly improve the drying efficiency.
Multi-stage heating technology: The multi-stage heating system adopts segmented drying, which divides the entire drying process into multiple stages of preheating, dehydration, and cooling. The temperature and airflow speed in each stage are different. For example, the temperature in the preheating stage is controlled at 120-150℃, the temperature in the dehydration stage can be increased to 200℃, and the cooling stage is reduced to below 80℃. This method can effectively reduce energy consumption and improve drying efficiency.
Airflow-assisted drying technology: Airflow-assisted drying technology suspends mineral powder in the dryer through high-speed airflow, which improves the heat transfer efficiency and the uniformity of material drying. The airflow speed is generally controlled at 15-20m/s. This method can not only dry the material, but also reduce the adhesion between particles. For mineral powder with a humidity of up to 30%, airflow-assisted drying can shorten the drying time by more than 30%.
Drum dryers usually have higher drying efficiency and are suitable for processing large quantities of mineral powder. For example, a drum dryer with a diameter of 3.6 meters and a length of 24 meters can process 30 tons of mineral powder per hour, with a drying efficiency of more than 80%. Vertical dryers are compact in structure and have high thermal energy utilization. They are suitable for processing materials with high humidity and have an efficiency of about 85%, but the processing capacity is relatively small. For example, a 2.4-meter-high vertical dryer can process about 10 tons per hour.
The drum dryer has a high energy consumption, with electricity consumption of about 18-22 kWh per ton of mineral powder. The vertical dryer has lower energy consumption by optimizing the structural design and heat recovery system, with electricity consumption of 14-18 kWh per ton of mineral powder. In addition, the vertical dryer can use exhaust gas recycling technology to further reduce energy consumption.
Drum dryers have a large floor space due to their horizontal layout. A standard drum dryer occupies about 300 square meters. Vertical dryers have a smaller floor space due to their vertical layout. A standard vertical dryer occupies about 80 square meters, which is very suitable for small factory sites.
Both drum dryers and vertical dryers have their own technical advantages and are suitable for different process requirements. Drum dryers are usually suitable for large-scale production and large processing capacity. They are widely used for drying bulk minerals such as iron ore powder and copper ore powder. Vertical dryers are more suitable for processes that require small space or precise control. They are often used in small-scale production or applications that require high drying uniformity, such as the drying of spodumene ore powder.
The key to improving the heat transfer efficiency of mineral powder dryer lies in the optimization design of the internal structure of the equipment, especially the control of the lifting plate and airflow path.
Combined lifting plate design: The lifting plate is the core component to increase the contact area between mineral powder and hot air flow. By changing the arrangement angle and shape of the lifting plate, the heat transfer efficiency can be significantly improved. Generally speaking, the 45° lifting plate design can make the mineral powder evenly distributed inside the drum, make the mineral powder more evenly spread, increase the contact time with the hot air flow, and improve the heat transfer efficiency by 15%-20%.
Airflow path control: In the dryer, the design of the airflow path directly affects the drying efficiency. Countercurrent design, that is, the hot air flow is opposite to the material flow direction, so the material can be heated for a while longer, allowing the material to dry faster. However, countercurrent design may also increase energy consumption, so it is key to reasonably design the position of the air inlet and exhaust port to ensure uniform airflow distribution.
Add dust prevention device: Installing a cyclone dust collector or bag dust collector at the exhaust end of the mineral powder dryer is an effective way to reduce the loss of fine powder. The cyclone dust collector uses centrifugal force to throw out and recycle fine powder, which is suitable for processing large-particle mineral powder; while the bag dust collector can capture finer dust particles, with better filtering effect and filtration efficiency of up to 99%, which is particularly suitable for processing mineral powder with a particle size of less than 10 microns.
Optimize the feeding system: By improving the feeding device, ensure that the mineral powder is evenly distributed when entering the dryer, and avoid the generation of local high airflow areas, thereby reducing the fine powder from floating out, reducing losses and reducing pollutant emissions. For example, using an adjustable feeder or a spiral feeding device can effectively control the feeding speed and distribution and reduce dust emission.
The dryer efficiently handles mineral powders, reducing moisture for improved storage, handling, and use in manufacturing processes
Ideal for drying gypsum powder, the dryer reduces moisture content, making it suitable for use in plaster, cement, and other building materials
The dryer processes limestone powder, reducing moisture to improve its quality for use in construction, agriculture, and chemical industries
Suitable for drying bentonite powder, this dryer enhances flowability and prepares the material for use in drilling, foundries, and agriculture
The dryer is effective in drying dolomite powder, reducing moisture levels for use in steel production, glass manufacturing, and agriculture
The dryer handles clay powder, reducing moisture for use in ceramics, brick making, and other industrial applications
Efficient in drying silica sand powder, the dryer prepares it for use in construction, glass production, and water filtration applications
The dryer processes talc powder, ensuring the removal of excess moisture to enhance its use in cosmetics, pharmaceuticals, and industrial applications
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