Counterweight Iron Sand

Counterweight Iron Sand is a finely ground high-purity pig iron material developed for high-density filling in sealed cavities and for integral concrete casting applications. The product is designed for static counterweight projects where uniform density, low dust emission, and reliable long-term stability are required. It is produced from a single raw material source without the addition of slag or recycled scrap, which helps maintain consistent chemical and physical properties across batches.

Shandong Haishan Industrial Technology Co., Ltd. manufactures this material at its production facility in Zouping, Shandong Province. The production process includes grinding, multi-stage dust removal, grading, and batch inspection. The facility operates under ISO 9001, ISO 14001, and ISO 45001 management systems, and all production records are retained for batch traceability. This product is not suitable for long-distance negative-pressure pneumatic conveying, a limitation that is disclosed to help buyers select the correct filling method.

Technical Parameters

Common Filling Challenges and Material Response

Through internal testing on production lines, the fine sand grading with a bulk density of 7.0 g/cm³ or higher provides a more compact fill compared with coarse sand, and no settlement layer is observed after integral curing. The following points summarize how this material addresses typical problems with conventional coarse ballast sand.

• Large voids in coarse sand: Coarse particles leave unfilled spaces and cannot achieve the designed weight addition per unit volume. The fine grading of this product improves filling density.
• Stratified settlement during casting: Uneven density after curing leads to long-term ballast deviation. This material is graded to resist settlement after integral curing.
• Dust and equipment wear: Dust creates site environmental issues and accelerates wear on conveying pipes and mixers. Multi-stage dust removal reduces airborne dust, and moderate hardness helps lower equipment wear.

Product Parameter Comparison

Material Advantages

• Constant specific gravity from single material: Manufactured solely from washed high-purity pig iron without added slag, which reduces batch-to-batch specific gravity fluctuation.
• Grading to reduce voids: A combination of fine and coarse particles lowers the internal void ratio compared with coarse sand solutions.
• Low dust and eco-friendly operation: A multi-stage dust removal system on the production line helps meet construction site environmental requirements.
• Controllable adhesion: Good wettability with concrete and binding resins reduces the risk of interfacial delamination after curing.
• Equipment-friendly hardness: Balanced hardness results in lower wear on filling line pipes and mixing tanks compared with crushed cast steel sand.

Shandong Haishan Industrial Technology is located in the Qingyang Economic Development Zone, Zouping, Shandong. The production facility is covered by ISO 9001, ISO 14001, and ISO 45001 management systems. Test reports can be provided in accordance with GB/T 6484, GB/T 6485, and SAE J444 standards where applicable.

Certifications

Typical Application Scenarios

• Integral one-piece casting filling for concrete ballast blocks
• High-density weight addition for sealed cabinets in engineering machinery and medical equipment
• Elevator ballast blocks, bridge ballast components, and small precision ballast parts
• Static ballast projects that require no stratified settlement

This product is not recommended for long-distance negative-pressure pneumatic conveying because fine sand has high flow resistance and an increased risk of pipe blockage.

Procurement and Delivery Information

Purchaser FAQ

Q1: What is the difference between ballast iron sand and ballast steel shot?

Ballast iron sand is produced from finely ground pig iron and is intended for filling applications where high density and cost efficiency are important. Ballast steel shot is cast steel focused on high strength and wear resistance. For one-piece casting and sealed cavity filling, fine iron sand is often a suitable choice.

Q2: How is the bulk density of 7.0 g/cm³ ensured?

Bulk density is tested for every production batch before shipment. The measured value is recorded on the batch certificate, with an allowable tolerance of ±0.05 g/cm³. Buyers can request a copy of the density report for their records.

Q3: Can this material be mixed with epoxy resin?

Yes. The material is compatible with epoxy resin and concrete. A small-sample casting test is recommended before full-scale use to observe the settlement behavior and confirm the final density.

Q4: If negative-pressure conveying is not recommended, how should the material be fed?

Static dumping from a hopper or short-distance screw and belt feeding are recommended methods. These approaches preserve the material's packing density and reduce the risk of dust generation and pipeline blockage.

Q5: How is the export packaging protected against moisture?

Standard export packaging includes an inner plastic lining, an outer woven bag, and pallet stretch wrap. This configuration provides ocean-shipping-grade moisture protection and helps prevent clumping during transit and storage.

Q6: What documents are provided with each shipment?

Each shipment includes a batch certificate with bulk density and inspection results. Additional reports for particle size distribution, dust content, and chemical composition can be provided upon request. Third-party inspection by SGS or BV can be arranged if required.

Q7: Can this product be used for dynamic balancing or moving parts?

This material is designed for static counterweight applications. For dynamic balancing or moving components, a different material with specific flow and wear characteristics may be more appropriate. Please consult our technical team for recommendations.

Q8: What is the recommended minimum order quantity?

Minimum order quantity is negotiable and depends on the total volume and packaging requirements. Sample orders starting from 25 kg are available for evaluation. Regular specifications can be shipped within 7–10 days.