Multi-Grade Precision Silica Sand Screening Solution for Artificial Stone Grade Quartz Powder

Project Overview

In the artificial stone manufacturing industry, quartz powder is a core filler material. The uniformity of its particle size distribution and purity directly determines the flexural strength, density, and surface finish of the final stone slabs.

This case comes from a well-known stone raw material processor in Russia. In the production of high-end artificial quartz stone slabs, the customer needed precise screening of silica sand into five grading ranges for quartz powder. However, due to irregular particle shapes resulting from upstream crushing processes, the customer experienced severe mesh clogging and metal contamination in their existing screening line.

With 30 years of industrial screening manufacturing experience, Sanyuantang Machinery provided a customized ultrasonic multi-layer screening and magnetic separation integrated solution.

Customer Challenges

The customer mainly produces fine quartz powder for artificial stone applications. Their original production line used a standard rotary vibrating screen, but as product quality requirements increased, several issues became critical:

• Severe Screen Clogging: Irregular, sharp-edged quartz particles easily became wedged into mesh openings during screening, forming “wedge clogging.” This significantly reduced efficiency and caused frequent shutdowns for cleaning.
• Inconsistent Multi-Grade Screening Accuracy: The customer required five precise fractions: 50 mesh, 60 mesh, 80 mesh, 100 mesh, and 150 mesh. Conventional vibrating screens struggled to maintain stable particle size distribution across multiple layers, leading to inconsistent product quality.
• Metal Contamination Risk: Even trace metal particles could cause black spots or stains in artificial stone slabs. The existing equipment could not effectively remove fine iron impurities.
• Conflict Between Capacity and Precision: Although the required capacity was only 100 kg/h, achieving stable high-precision silica sand screening across five layers simultaneously was a major technical challenge.

Problem Diagnosis

To ensure an accurate solution, Sanyuantang’s technical team adopted a dual verification method combining laboratory testing and on-site data analysis:

• Sample Testing & Laboratory Analysis: 50 kg of raw quartz powder was sent to our lab. Under microscopic inspection, a high proportion of needle-like and angular particles was confirmed, identifying the root cause of mesh clogging in silica sand screening.
• Multi-Layer Simulation Testing: Using a 5-layer (5S) screening simulation system, we recorded throughput efficiency and clogging thresholds under 100 kg/h conditions.
• Technical Confirmation via Data Exchange: All experimental results, microstructure comparisons, and improvement drawings were shared with the customer for technical validation and parameter alignment.

Proposed Solution

Based on precise diagnosis, we designed a tailored solution centered on the SYC-1200-5S ultrasonic vibrating screen.

• Ultrasonic Anti-Clogging System
  • To solve irregular particle blockage in silica sand screening, the system integrates an ultrasonic generator. High-frequency micro-vibrations break particle adhesion and instantly release mesh-blocked particles, fundamentally eliminating clogging issues.
• Custom 5-Layer High-Precision Structure
  • A customized 5-layer configuration was designed to achieve five-grade separation. By optimizing vibration force and ultrasonic parameters, uniform distribution and efficient stratification were ensured across all screening layers.
• Integrated Magnetic Iron Removal System
  • High-performance permanent magnetic separators were installed at each discharge outlet to remove iron impurities generated during crushing and handling, ensuring high-purity quartz powder output.
• Full Custom Engineering Design
  • From sealing materials to discharge layout, the system was fully customized to integrate seamlessly into the customer’s existing production line.

Recommended Equipment Model

SYC-1200-5S Ultrasonic Vibrating Screen

Technical reference: https://sanyuantangcn.com/products/ultrasonic-vibrating-screen

Before vs After Comparison

Achieved Results

With the implementation of the SYC-1200-5S ultrasonic vibrating screen, the customer successfully upgraded their production line.

The long-standing clogging issue in silica sand screening was completely resolved. High-efficiency and high-precision separation from 50 to 150 mesh was achieved continuously.

The uniformity and purity of the final quartz powder were highly recognized by downstream artificial stone manufacturers, significantly improving the customer’s market competitiveness.

The client stated:

“Sanyuantang’s equipment not only solved our production bottlenecks but also significantly improved our product competitiveness.”

Engineering Recommendations

For quartz powder and artificial stone silica sand screening applications, our engineers recommend:

1. Use Ultrasonic Screening Technology

Irregular and fine particles require ultrasonic-assisted vibration to eliminate mesh blockage effectively.

2. Improve Raw Material Pre-Treatment

Proper drying and moisture control reduce agglomeration and improve screening stability.

3. Fine-Tune Operating Parameters

Adjust vibration frequency, amplitude, and ultrasonic power based on material batch differences.

4. Establish Preventive Maintenance

Regular inspection of mesh tension, magnetic separators, and ultrasonic transducers ensures stable long-term operation.

5. Choose Suppliers with Material Testing Capability

Always verify performance through real material testing before equipment selection.

Industry Applications

This ultrasonic screening system is also widely used in:

Contact Sanyuantang

If you are facing similar challenges in silica sand screening or quartz powder grading, Sanyuantang Machinery provides full-cycle engineering support—from material testing and solution design to customized equipment manufacturing and commissioning.

With 30 years of expertise, we are committed to delivering reliable, high-efficiency screening solutions for global industries.

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