Combined Double-Rotor Classifier

▼ Technical Parameters

The combined double-rotor classifier is a highly efficient powder classification device that utilizes a double-rotor structure to achieve fine classification and concentration of materials. The equipment consists of high-speed rotating inner and outer rotors. Through the centrifugal force and airflow generated by the rotation, coarse, fine, and ultra-fine powders are effectively separated, enabling precise control of particle size distribution. The inner rotor performs primary classification, while the outer rotor performs secondary fine classification, significantly improving both classification efficiency and capacity.

This device features a compact structure and small footprint, making it suitable for various materials such as dry powders, mineral powders, chemical powders, and building materials powders. It offers continuous operation, high classification accuracy, and low energy consumption. The combined double-rotor design enhances the equipment's adaptability, allowing for flexible adjustment of rotational speed and classification parameters according to production needs, meeting the powder classification requirements of different particle sizes and process conditions. Its enclosed structure effectively prevents dust, and maintenance is simple, making it an important piece of equipment for improving product quality and production efficiency in modern powder production lines.

▼ Performance Features

1. The innovative combined propeller dispersion disc features optimized blade structure and angle configuration to ensure uniform material distribution. During rotation, it generates powerful upward airflow that fluidizes material particles into a boiling state, significantly improving dispersion homogeneity and creating ideal conditions for subsequent classification.

2. The classification system integrates three force fields - gravity settling, centrifugal separation and cyclonic vortex - achieving precise grading through multi-physical field synergy. This breakthrough design improves classification accuracy by over 30% compared to conventional equipment.

3. The patented lower cage rotor design incorporates special material-lifting devices to reintroduce settled particles into the classification process. Tests confirm this technology reduces fine powder content in coarse product below 3%, dramatically improving product qualification rates.

4. The variable frequency drive system enables stepless speed regulation of the main shaft (200-1500rpm), allowing precise fineness control within 80-600 mesh range with adjustment response time under 5 seconds.

5. CFD-optimized separation and lifting zones extend material retention time by 30%, achieving 99.2% dust collection efficiency.

6. The high-efficiency low-resistance cyclone collector employs involute air inlet design, reducing system resistance by 35% while increasing collection efficiency to 99.5%.

7. The innovative anti-condensation system includes:
- Self-adjusting elastic cleaning devices
- Thermal insulation heating components
- Humidity monitoring system
Ensuring condensation-free operation at 90% humidity environments.

8. The modular foundation-free fan offers:
- 50% reduction in installation time
- Vibration levels below 0.8mm/s
- IP65 dust protection rating
- 30% savings in infrastructure investment

  
▼ Industrial Applications
1. Construction Aggregates and Manufactured Sand Industry
In manufactured sand production lines, high-efficiency sand and powder separators are used to separate stone powder from sand as needed, ensuring that the fineness modulus, particle size distribution, and powder content of the sand meet construction standards. This effectively improves the quality of the finished sand, resulting in more stable concrete and mortar performance, and avoiding problems such as low strength, bleeding, and cracking caused by excessive stone powder content.
2. Concrete and Pre-mixed Mortar Industry
The concrete production process has very strict requirements for sand quality; excessive fine powder can affect construction performance and durability. Sand and powder separators can accurately control the stone powder content, ensuring that the sand meets the proportioning standards, improving the stability and strength of concrete and dry-mix mortar, and reducing quality risks caused by unstable materials.
3. Cement and Mineral Powder Preparation Industry
In the production of powders such as cement, mineral powder, and metallurgical powder, high-efficiency separators can be used for coarse and fine powder classification, enabling products to meet specific specific surface area and fineness requirements. The separator reduces over-grinding, improves powder quality, and reduces energy consumption, making it one of the key pieces of equipment in powder preparation.
4. Mining and Mineral Processing Industry
In the ore crushing and screening process, sand and powder separators can be used for the classification and de-dusting of fine ore materials, improving the efficiency of subsequent screening and mineral processing. By removing fine powder, impurities in the ore slurry can be reduced, increasing the recovery rate of mineral products and improving the overall efficiency of the mineral processing production line.
5. Metallurgy and Metal Materials Industry
In the processing of metal powders, metallurgical powders, and furnace charge powders, separators can accurately classify powders, resulting in more uniform particles and meeting the particle size distribution requirements of metallurgical processes, improving the stability and quality of sintering and smelting processes.
6. Chemical Powder Manufacturing Industry
The chemical industry often requires powders of different fineness grades, such as fertilizer powder, filler powder, and additive powder. High-efficiency sand and powder separators can classify powders, enabling products to meet specific particle size standards, improving the uniformity and reaction efficiency of chemical products. 

▼ FAQ

What is the working principle of a Powder Concentrator?
A powder concentrator primarily separates fine or lightweight powders from coarser particles in a mixture using centrifugal force, airflow classification, or cyclone technology. After the material enters the equipment, under the action of high-speed rotation or airflow, denser particles are thrown outwards or settle, while lighter powders are concentrated in the collection area by the airflow, achieving powder classification and concentration. This process can be continuous, offering high separation accuracy, improving material purity and particle uniformity, and reducing the processing burden of subsequent processes. It is suitable for various applications, including mineral powders, chemical powders, and building materials powders.

What are the main application industries of Powder Concentrators?
Powder concentrators are widely used in mining, building materials, chemical, metallurgical, and environmental protection industries. In the mining industry, they can be used for the concentration and classification of mineral powders, tailings, and beneficiation powders; in the building materials industry, they can be used for particle size control of cement powder, lime powder, or fly ash; the chemical industry can process resin powders, additive powders, and other materials; in the environmental protection field, they can be used for the recovery and resource utilization of solid waste powders. Through classification and concentration, this equipment improves powder purity and uniformity, providing stable and high-quality raw materials for production processes.

How to maintain a Powder Concentrator to ensure stable operation?
Routine maintenance mainly includes checking the wear of the rotating parts, bearings, and separation impeller, and ensuring the lubrication system is functioning properly. The equipment should be regularly cleaned to remove accumulated material and residual powder to prevent blockages or material adhesion from affecting separation efficiency. For airflow classification types, the fan, piping, and filtration system need to be kept clean. If abnormal vibration, increased noise, or decreased separation efficiency is observed during operation, the machine should be stopped immediately for inspection, and worn or damaged parts should be replaced promptly. Proper maintenance not only extends the equipment's lifespan but also maintains separation accuracy and production stability.

▼ Company Introduction

Yancheng Jierda Environmental Protection Equipment Co., Ltd. specializes in the R&D and manufacturing of advanced solutions for gas purification, including filtration and adsorption technologies for dust and pollutant-laden gases, gas-liquid mixing, collision, interception and capture processes, as well as catalytic combustion systems for organic waste treatment. Continuously innovating in technology and applications, we deliver cutting-edge products and engineering services tailored to industrial needs.
Backed by strong technical expertise, we provide end-to-end services in the design, manufacturing, and installation of environmental projects such as industrial VOC treatment, dust removal systems, flue gas desulfurization (FGD), and denitrification (SCR/SNCR) solutions.
We warmly welcome partners and clients from around the world to visit our facilities, explore cooperation opportunities, and collaborate for a greener future.