Modular Tower-Type Classifier for Ore Powder Classification
Spiral Sand Washer Equipment Overview
The DLVF Tower-Type Classifier is a three-in-one air classification system independently developed by Zhongyu Dingli, specifically designed for the separation of manufactured sand and stone powder, as well as the precise grading of ore powder. Featuring a high-strength tower-style three-dimensional layout, it requires minimal floor space and reduces civil engineering costs. Its modular steel structure, connected with high-strength bolts, enables quick on-site installation and a short construction cycle. The three-in-one air classification system ensures thorough separation of manufactured sand and stone powder, resulting in dry, clean finished sand with precise grading of oversized particles, while stone powder is collected separately as a high-value-added product. The fineness modulus and particle size distribution can be adjusted online. The negative-pressure closed-loop circulation system reduces energy consumption for dust removal and improves dust collection efficiency. With a production capacity of 100–300 tons per hour and a feed powder content of ≤30%, it serves as the core classification equipment for enhancing the quality and value of manufactured sand production lines.
Spiral Sand Washer Equipment Highlights
Three-in-One Air Classification: Integrated powder separation, grading, and dust collection ensure complete separation of manufactured sand and stone powder, resulting in clean finished sand and high-value utilization of stone powder.
Online Adjustable Fineness Modulus: The air classification system allows real-time adjustment of the finished sand’s fineness modulus and gradation, flexibly adapting to different standards such as ready-mix and dry-mix concrete.
Negative Pressure Closed-Loop Circulation: Negative pressure operation minimizes dust leakage, reduces dust collection energy consumption, and maximizes collection efficiency, ensuring compliance with environmental standards.
Tower-Style Three-Dimensional Layout: The three-dimensional tower structure minimizes footprint and ensures high stability, reducing civil engineering costs and making it ideal for projects with limited space.
Modular Quick Assembly: Steel structural modules connected with high-strength bolts enable quick and convenient on-site installation, significantly shortening the construction cycle.
Precise Stone Powder Grading: Accurate separation of oversized particles produces high-value-added stone powder, turning waste into profit and increasing revenue.
Spiral Sand Washer Application Scenarios
Artificial Sand Classification: Separates stone powder at the end of the sand production line to improve artificial sand quality and meet standards for ready-mix concrete and dry-mix mortar
Mineral Powder Classification: Fine classification of various mineral powders to produce high-value powder products of different fineness grades
Resource Utilization of Stone Powder: Separate collection of stone powder for high-value-added applications such as cement admixtures and coating fillers
Space-Constrained Projects: Tower-style layout saves space, making it suitable for retrofitting existing production lines and new construction projects with limited space
Spiral Sand Washer Process Flow
Customized process for stone powder separation in manufactured sand production lines:
Output from the sand maker (DLZSJ twin-rotor sand maker) is conveyed via a belt into the DLVF tower-type classifier, where the material is subjected to a three-in-one air classification system. Sand and powder are thoroughly dispersed within the airflow; the stone powder is carried by the airflow to the classification zone for precise separation, with the fine powder entering the dust collection system to be collected as a high-value-added stone powder product. The fineness modulus and gradation of the finished manufactured sand are controlled through online adjustment of air classification parameters to meet standards for various applications. The classifier operates under a negative-pressure closed-loop system, reusing the airflow to prevent dust leakage and minimize energy consumption for dust collection. The entire unit is integrated with the sand-making line via a closed-loop interlock system, ensuring the finished sand’s powder content is controlled within 3–5%, with a stone powder collection rate exceeding 90%.
Services
Solution Design: Customize tower-type classifier specifications and air classification parameters based on raw material powder content, finished sand fineness modulus requirements, production capacity targets, and site conditions.
Equipment Manufacturing: The classifier body, air classification system, classification rotor, and dust collection system are all manufactured in-house. Modular steel structures are pre-assembled at the factory, ensuring quality control.
Installation and Commissioning: Modular components are bolted together on-site. Engineers perform air classification parameter calibration, negative pressure system commissioning, and trial production in conjunction with the sand-making line.
Operation and Maintenance Management: We provide full-cycle O&M services, including classifier operation monitoring, classification rotor wear alerts, regular dust collection system inspections, and pre-stocked spare parts supply.
Spiral Sand Washer Project Case Study
Project Location: Ready-Mix Concrete and Manufactured Sand Classifier Project in Hanoi, Vietnam
Project Overview: The client is a large local ready-mix concrete company with a sand production line capable of producing approximately 250 tons per hour. The original manufactured sand had a high powder content of 18–22%, far exceeding the standard of ≤7% for ready-mix concrete. The large amount of stone powder mixed with the sand adversely affected concrete strength. One Zhongyu Dingli DLVF tower-type classifier was selected. The operating output has stabilized at 220 tons per hour, with the finished manufactured sand’s powder content consistently controlled below 4.5%. The fineness modulus of 2.6–2.8 can be adjusted online.
Operational Results: The separation and collection rate of stone powder exceeds 92%, yielding approximately 80,000 tons of high-purity stone powder annually. This material is sold as a cement admixture, generating additional revenue; The powder content in the finished sand has been reduced from 18% to 4.5%, significantly reducing fluctuations in concrete strength; the tower layout saves approximately 55% of floor space compared to flat-bed classifier systems; modular installation was completed and production commenced within 12 days; customer feedback: “The sand is cleaner, concrete quality is more stable, and we can even sell the stone powder for profit—it’s a win-win-win situation.”
Technical parameters:
| Model |
Powder content of raw materials (%) |
Processing capacity (t/h) |
| DLFX100 |
5-32 |
100-120 |
| DLFX200 |
5-32 |
130-150 |
| DLFX300 |
5-32 |
220-250 |
| DLFX400 |
5-32 |
270-300 |
Spiral Sand Washer FAQ
Q: How does the tower-type classifier reduce the powder content in manufactured sand from over 20% to within 5%?
A: The DLVF tower-type classifier employs a three-in-one air classification system. After materials are thoroughly dispersed in the airflow, they are precisely cut by the classification rotor, and the stone powder is carried away by the airflow for collection. Small Footprint Tower-type Ore Powder Classifier The powder content in the finished sand can be stably controlled at 3–5%. For the sand classification process in manufactured sand production, the separation efficiency of the three-in-one air classification equipment far exceeds that of traditional water washing processes. Furthermore, it produces no wastewater, and the finished sand is dry and clean, ready for direct storage.
Q: How long is the installation period for a modular tower-type classifier when retrofitting an existing sand production line with limited space?
A: Modular steel structural components are pre-fabricated before leaving the factory; on-site assembly requires only high-strength bolts, eliminating the need for large-scale welding operations. The installation period is shortened by more than 50% compared to traditional equipment. Negative Pressure Closed-Circuit Powder Separator The tower-style vertical layout occupies only about 45% of the floor space required by a horizontal classification system, making it particularly suitable for retrofitting existing production lines with limited space. For 100–300-ton tower-style classification equipment, the process from delivery to commissioning and production start-up typically takes 10–15 days.
Q: How does the negative-pressure circulating classifier achieve high-value utilization of stone powder during the sand-powder separation process?
A: The DLVF negative-pressure closed-loop system precisely classifies and collects stone powder during the classification process, accurately separating particles exceeding the specified size limit. The resulting stone powder has uniform fineness and low moisture content, making it suitable for direct sale as a high-value cement admixture, coating filler, or building material raw material. Easy Install Tower Type Powder Separator The adjustable fineness modulus classifier allows for real-time adjustment of stone powder fineness grades based on market demand, enabling dual revenue streams from both sand and stone powder and significantly enhancing the overall economic efficiency of the production line.
