
Limestone and products
Metallurgical limestone, construction aggregate and desulphurisation stone powder with a stable calcium oxide content.
- Stable supply
- Technical support
- Custom specs
Hongtai mines and processes limestone, dolomite and kaolin from four company-owned quarries and three processing lines, producing 2.6 million tonnes a year for construction materials, metallurgy and chemicals.

Every item is validated in real use and can be adapted to your specification.

Metallurgical limestone, construction aggregate and desulphurisation stone powder with a stable calcium oxide content.

Metallurgical dolomite, refractory-grade dolomite and dolomite powder for steelmaking and refractories.

Washed and calcined kaolin with high brightness and even particle size for ceramic bodies and paper coating.

Powder from 800 to 3,000 mesh for coatings, plastics and rubber fillers, with controlled activation.

Crushed stone, manufactured sand and stone dust to specification, supplied to concrete plants and infrastructure projects.

Processing to the customer particle size, brightness and chemistry, with trial runs and stability verification.
Every figure comes from actual deliveries and client feedback.
Every step from briefing to after-sales has a defined owner and standard.
Four company-owned quarries with reserves above 260 million tonnes and all permits in place.
Three lines produce ultrafine powder, activated filler and surface-modified grades.
Green mine certification with continuous dust monitoring and spray suppression across all sites.
An 86-vehicle fleet and a dedicated rail siding support bulk, bagged and container shipments.
A look at how we solved problems for clients like you.

860,000 tonnes of metallurgical limestone a year with dedicated transport.
Six years of continuous supply

Limestone powder for flue gas desulphurisation, delivered to silo.
Desulphurisation efficiency maintained

Washed kaolin supplied to 26 ceramics producers.
Batch brightness variation ≤1.5

Surface-modified ultrafine powder developed for coating filler.
Customer cost −12%
Each stage has a defined deliverable and a named contact.
Clarify the scenario, the metrics and the budget range
A tailored plan with itemised pricing
Milestones agreed up front, progress shared as we go
We track how it performs in use and keep improving it
Trusted by leading companies
302026.07The upgrade raises the share of 3,000-mesh product and tightens the particle s…
162026.05Reclamation and dust control indicators were both rated excellent.
142026.04Ultrafine grinding, surface modification and functional composites — where the…
Still have questions? Contact us — we reply within one business hour.
We serve clients nationwide and handle cross-region delivery. Tell us your location and requirements and we will assign the right team.
Send us your requirement, quantity and delivery expectation through the form or by phone. We issue a formal quotation within 1–2 business days.
Yes. Depending on your requirement we can send samples or arrange a small trial run so you can validate performance in real use.
A dedicated after-sales team provides support through the whole service period, with response times stated in the contract.
Yes. We build long-term relationships, and most clients have worked with us for over three years. Annual agreements can fix price, capacity and quality terms.
Tell us what you need — we will route it to the right specialist within one business day. +86 551 6688 9900