Henan, China / Philippines — July 2025 — Henan Hongke Heavy Machinery Co., Ltd. ("Hongke Heavy Industry") is pleased to report that the installation of an environmentally friendly lime rotary kiln system for a valued client in the Philippines is progressing on schedule. The project, which includes a complete lime production line with integrated environmental protection systems, represents another milestone in Hongke's growing presence in the Southeast Asian market.
Project Background
The Philippines has experienced sustained demand for high-quality quicklime (CaO) driven by the steel, construction, chemical, and environmental treatment industries. As the country continues to invest in infrastructure development and industrial modernization, domestic lime producers are seeking efficient, environmentally responsible production technologies to replace older, less efficient shaft kilns and batch-type lime kilns.
The client — a well-established Philippine industrial group — selected Hongke Heavy Industry as its equipment partner after a thorough evaluation of multiple suppliers. Key factors in the decision included Hongke's proven experience in lime rotary kiln manufacturing, the company's ability to provide integrated environmental systems, and the competitive overall project value.
Equipment Overview
The installation comprises a complete lime rotary kiln production line with the following core equipment:
The system is designed to process local limestone with varying calcium carbonate content, producing high-activity quicklime suitable for steelmaking, flue gas desulfurization, water treatment, and construction applications.
Environmental Protection Features
A defining characteristic of this project is its comprehensive environmental protection design. In line with both Philippine environmental regulations and Hongke Heavy Industry's commitment to sustainable engineering, the lime kiln installation incorporates the following green features:
Low-Emission Combustion System
The rotary kiln is equipped with a multi-channel burner designed for optimized combustion with low NOx formation. The burner supports dual-fuel operation — pulverized coal as the primary fuel and natural gas as an alternative or backup — providing fuel flexibility while maintaining clean combustion performance.
High-Efficiency Bag Filter Dust Collection
The entire production line — including the preheater, kiln exhaust, cooler, and all material transfer points — is served by a high-efficiency pulse-jet bag filter system designed for exhaust gas temperatures up to 250 °C. The system achieves particulate emissions well below 30 mg/Nm³ at the stack, meeting both Philippine Clean Air Act requirements and international best-practice benchmarks.
Waste Heat Utilization
Hot exhaust gas from the rotary kiln is first routed through the vertical preheater, where it preheats the limestone feed to approximately 900 °C before entering the kiln. This heat exchange process reduces the exhaust gas temperature exiting the preheater to approximately 250 °C, recovering a significant portion of the thermal energy and lowering overall fuel consumption. The specific heat consumption of the system is guaranteed at ≤ 850 kcal/kg of quicklime — substantially lower than traditional shaft kiln designs.
Enclosed Material Handling
All material transfer points — from limestone feed hoppers through the preheater, kiln, cooler, and finished product storage — are fully enclosed with dust-tight chutes and connected to the centralized bag filter system. This design eliminates fugitive dust emissions at the plant site, protecting both the workforce and the surrounding community.
Water Conservation
The cooler and kiln seal systems use closed-loop water circulation where applicable, minimizing freshwater consumption. Process water is recirculated through settling and cooling systems, and no process wastewater is discharged to the environment.
Installation Progress
Hongke Heavy Industry's on-site installation team, working closely with the client's local construction crew, has completed the following milestones to date:
- Civil foundations: All major equipment foundations — kiln support stations, preheater tower, cooler, bag filter, and material handling structures — have been completed and verified against the manufacturer's elevation and alignment tolerances.
- Kiln shell erection: The rotary kiln shell sections have been delivered, aligned, and welded on-site under the supervision of Hongke's experienced installation engineers. Circumferential and longitudinal welds have been completed and inspected.
- Support station assembly: All three support stations — including tire rings, trunnion roller assemblies, thrust rollers, and bearing housings — have been installed and aligned. The girth gear and pinion have been meshed and adjusted.
- Preheater and cooler installation: The vertical preheater tower structure, push-rod feeding system, and cooler assembly have been erected and connected to the kiln.
- Bag filter and ductwork: The pulse-jet bag filter has been installed, and the main exhaust ductwork connecting the preheater, cooler, and material handling points to the filter is nearing completion.
- Electrical and control systems: Cable tray installation and cable pulling are in progress. The DCS control panel and field instruments are on-site and ready for connection.
The project remains on track for commissioning within the scheduled timeframe. Hongke Heavy Industry's commissioning team will be deployed to the site to conduct cold commissioning (mechanical and electrical checks), hot commissioning (first fire, heat-up, and feed introduction), and the final performance guarantee test run.
Client Comment
The client's project manager shared the following feedback during a recent progress review meeting:
"The installation is going very well. Hongke's on-site engineers are experienced, professional, and proactive in solving any technical challenges that come up. The equipment quality is excellent — the kiln shell fit-up and gear alignment were very precise. We are confident that this lime kiln will perform well once commissioned, and we are already discussing potential future cooperation with Hongke."
Why This Project Matters
This installation demonstrates several important capabilities that set Hongke Heavy Industry apart in the lime rotary kiln market:
- Integrated environmental design: Hongke does not treat environmental systems as afterthoughts. Dust collection, emission control, waste heat recovery, and enclosed material handling are designed into the system from the earliest engineering stage.
- International project execution: From engineering and manufacturing in China to shipping, on-site installation supervision, and commissioning in the Philippines, Hongke delivers a complete, professionally managed project experience.
- Adaptability to local conditions: The kiln system design was tailored to the client's specific limestone chemistry, local fuel availability, and Philippine regulatory requirements — not a one-size-fits-all package.
- Reliable equipment manufacturing: All critical components — kiln shell, girth gear, preheater, cooler, and structural steelwork — were manufactured in Hongke's own production facility, ensuring quality control from raw material to finished product.
About Henan Hongke Heavy Industry
Henan Hongke Heavy Industry Machinery Equipment Co., Ltd., headquartered in Henan Province, China, is a professional manufacturer of rotary kiln systems for lime, cement, and metallurgical applications. The company's 80,000+ m² production facility is equipped with heavy plate rolling machines, CNC machining centers, submerged-arc welding stations, and comprehensive quality control laboratories, enabling complete in-house manufacturing of all major rotary kiln components.
Hongke Heavy Industry serves clients across Asia, Africa, the Middle East, and South America, providing engineering, manufacturing, shipping, installation supervision, commissioning, and after-sales support as an integrated service package.
For inquiries about our lime rotary kiln solutions, please contact us.
Henan Hongke Heavy Industry Machinery Equipment Co., Ltd. — Your Trusted Partner for Rotary Kiln Solutions.