Runhuabang 325 Mesh Diatomite: Sewage Additive & Fireproof?

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Oct . 07, 2025 13:00

Calcined diatomite in wastewater: where filtration meets fire-safety filler

If you’ve been watching the quiet revolution in municipal and industrial water treatment, you’ve likely heard whispers about Runhuabang Sewage treatment feed addition with calcined diatomite 325 mesh suspension performance good fireproof material filled. The name’s a mouthful—granted—but the idea is simple: a refined mineral with high porosity that behaves beautifully in suspension, doing double duty as a body-feed/filter-aid in sewage treatment and as an inert, fire-resistant filler in coatings, putties, and insulation boards. To be honest, it’s the multipurpose angle that caught my eye.

Why it’s trending

Utilities are under pressure to cut coagulant doses, lower sludge volumes, and still hit stricter discharge permits. Calcined diatomite (325 mesh) offers high surface area and micro-porous structure, so it can boost TSS capture and polish effluents when co-dosed with PAC/FeCl₃. On the materials side, it’s inorganic and non-flammable—handy as a lightweight filler in fire-aware formulations. Many customers say it’s a rare “both/and” material.

Quick specifications (real-world use may vary)

Grade	Calcined diatomite, 325 mesh
SiO₂ (dry basis)	≈ 85–92%
Bulk density	≈ 0.22–0.35 g/cm³
Median particle size (D50)	≈ 30–45 μm (ISO 13320)
pH (10% slurry)	≈ 6.5–8.5
Suspensibility (30 min)	≥ 95% (internal QA)
Combustibility	Inorganic, non-flammable (tested per ISO 1182-type methods)
Origin	0811, Building H2, Poly Plaza (North District), 95 Shifang Road, Chang'an District, Shijiazhuang, Hebei

How plants actually use it

- Body-feed in pressure/suction filtration: 0.05–0.2% w/v slurry; optional precoat 0.3–0.7 kg/m² filter area.
- Co-dosing in clarifiers: typically 50–300 mg/L with PAC or ferric salts; fast mix 200–400 rpm for 1–2 min, then slow mix 30–60 rpm for 10–15 min; settle 20–30 min.
- Target pH: around 6–9 for consistent floc architecture.

Testing standards commonly referenced: particle size (ISO 13320), BET surface area (ISO 9277), TSS/MLSS (APHA Standard Methods 2540), and sludge volume index checks. For the fireproof-filler crowd, it’s valued as a low-density, non-flammable extender that can improve char structure in halogen-free systems—no silver bullets, but it helps.

Case snapshot

A north China municipal WWTP trialed Runhuabang Sewage treatment feed addition with calcined diatomite 325 mesh suspension performance good fireproof material filled as a 0.1% body-feed ahead of sand filters. With PAC kept constant, operators reported ≈15–25% better TSS polishing and visibly tighter backwash cycles. Not scientific gospel, but consistent over two weeks.

Vendor comparison (high-level, indicative)

Vendor	SiO₂	Suspension	Certs	Lead time	Customization
Runhuabang	≈ 85–92%	≥95% (30 min)	ISO 9001/14001	7–14 days	Mesh, surface treatment, blends
Generic Supplier A	≈ 80–88%	≈88–93%	ISO 9001	2–4 weeks	Limited
Local Miner B	≈ 75–85%	≈80–90%	—	Varies	Minimal

Customization and QA

Mesh options: 200–600; hydrophobic or silane-treated grades for polymers; moisture Runhuabang Sewage treatment feed addition with calcined diatomite 325 mesh suspension performance good fireproof material filled is manufactured under ISO 9001 and ISO 14001, with REACH/RoHS-conscious formulations on request.

Where it fits

- Municipal and industrial WWTPs (clarifiers, DAF, media filters)
- Food and beverage polish filtration (check grade compliance locally)
- Fire-aware fillers for sealants, putties, coatings, insulation boards

Final tip: pilot first. It seems that a 1–2 week trial captures seasonal swings and gives ops teams time to dial in dose curves.