Ceramsite Sand Rotary Kiln
High-Temperature Expansion & Sintering Rotary Kiln for High-Strength Lightweight Ceramsite Aggregate
Ceramsite Sand Rotary Kiln is professional high-temperature thermal processing equipment specially developed for lightweight aggregate production. Different from mineral decomposition kilns, it focuses on material expansion and pore-forming sintering. It can process fly ash, shale, coal gangue, sludge and tailings into high-strength, lightweight, porous ceramsite sand via staged heating and 1100-1380℃ precise sintering. Widely used in lightweight concrete, construction filling, oil proppant and environmental solid waste recycling projects.
Uniform Expansion
Resource Recycling
Stable Quality
What is Ceramsite Sand Rotary Kiln?
Ceramsite sand is a new type of environmentally friendly lightweight aggregate with porous structure, low density, high strength, heat insulation and corrosion resistance. Raw materials such as fly ash, shale and sludge have no industrial utilization value before processing. Traditional sintering equipment cannot accurately control expansion temperature and heating time, resulting in insufficient bulking, collapsed pores, low finished product strength and high defective rate, which seriously restricts ceramsite quality and market application.
Our High-Precision Ceramsite Sand Rotary Kiln adopts exclusive staged preheating, expansion and constant-temperature sintering technology, perfectly matching the physical expansion characteristics of ceramsite raw materials. It precisely controls the pore-forming and crystal hardening process of materials, ensuring uniform particle size, consistent porosity and high compressive strength of finished ceramsite. Equipped with efficient waste heat recovery system, it realizes energy-saving production and large-scale solid waste resource recycling, creating high economic and environmental benefits for customers.
Core Structural Composition & Functional Advantages of Ceramsite Sand Rotary Kiln
1. Special Expansion-Friendly Kiln Body Structure
The kiln cylinder adopts optimized inclination and rotating speed design specially for ceramsite pellet sintering. It ensures slow and uniform rolling of granular materials, avoiding pellet cracking, deformation or adhesion during high-temperature expansion. The thickened steel plate welding structure ensures long-term stable operation under high-temperature expansion working conditions without deformation.
2. High-Temperature Resistant Special Refractory Lining
The inner wall is paved with high-strength high-temperature resistant refractory bricks and multi-layer heat insulation lining. It stabilizes the internal sintering temperature field, reduces heat loss, and avoids local temperature difference leading to inconsistent expansion degree of ceramsite pellets. The lining has strong erosion resistance and long service life, adapting to long-term continuous sintering production.
3. Three-Zone Intelligent Temperature Control System
Equipped with independent preheating, expansion and sintering zone temperature adjustment modules. The core sintering temperature is stably locked at 1100-1380℃ with precise temperature error control. It effectively solves common industry problems such as insufficient expansion, pore collapse and low strength caused by unreasonable temperature control of traditional equipment.
4. High-Efficiency Multi-Fuel Combustion System
Supports natural gas, coal powder, diesel and biomass fuels. The optimized flame burner forms uniform and soft heat radiation, ensuring full fuel combustion and uniform heating of each ceramsite pellet. It adapts to different regional fuel conditions, reduces fuel consumption and lowers production costs.
5. Full Waste Heat Recovery & Circulating System
The high-temperature waste heat from flue gas and cooling process is recycled for raw material preheating and pellet drying. The comprehensive energy-saving rate is over 26%. It greatly reduces invalid heat loss, improves overall thermal efficiency, and realizes low-energy consumption ceramsite production.
6. High-Tightness Sealing & Environmental Protection Dust Removal
Kiln head and kiln tail adopt multi-layer flexible sealing structure to prevent cold air intrusion and flue gas leakage. Matched with pulse dust removal equipment, it realizes zero dust overflow during production. It not only meets international environmental protection standards, but also avoids fine pellet material loss.
7. Stable Frequency Conversion Transmission System
Adopts high-torque variable frequency motor and precision reducer, with stepless adjustable rotating speed. It can flexibly adjust material residence time according to different raw materials (fly ash, shale, sludge) to ensure optimal expansion and sintering effect of different ceramsite types.
Core Product Advantages of Ceramsite Sand Rotary Kiln
1. Uniform Expansion & Stable Pore Structure
Exclusive staged temperature control technology accurately matches the expansion mechanism of ceramsite raw materials. Each pellet is heated evenly with full internal pore-forming and no collapse or hollow defects. The finished ceramsite has uniform porosity, stable lightweight performance and consistent bulk density, which is superior to ordinary sintering equipment.
2. High Finished Product Strength & Low Defect Rate
The high-temperature constant-temperature sintering zone hardens the ceramsite shell structure, greatly improving compressive strength and wear resistance. The defective rate of cracked and deformed particles is controlled below 1%, ensuring stable and reliable quality of ceramsite sand for high-standard construction and proppant applications.
3. Wide Raw Material Adaptability & Strong Resource Recycling
This kiln is compatible with various raw materials: fly ash, shale, coal gangue, municipal sludge, industrial tailings and clay. It can turn industrial solid waste into high-value lightweight aggregate, realizing waste recycling, reducing environmental pressure and bringing additional environmental and economic benefits for enterprises.
4. Significant Energy-Saving & Low Operating Cost
The closed-loop waste heat recycling system maximizes heat utilization rate. Compared with traditional ceramsite sintering equipment, the comprehensive energy consumption is reduced by more than 26%. Long-term continuous production effectively saves fuel and power costs, with prominent cost advantages.
5. Large Continuous Output & Stable Batch Quality
24-hour uninterrupted rotary production mode realizes continuous feeding, sintering and discharging. Intelligent parameter calibration eliminates manual errors, ensuring consistent expansion degree, particle size and strength of each batch of ceramsite products, suitable for large-scale industrial production.
6. Durable Structure & Low Maintenance Rate
Targeted structural optimization for ceramsite high-temperature sintering environment, with high temperature resistance, wear resistance and anti-adhesion performance. Vulnerable parts have long service life, simple daily maintenance and low replacement cost, realizing long-term stable low-cost operation.
Working Principle & Complete Calcination Process of Ceramsite Sand Rotary Kiln
Core Working Principle
The Ceramsite Sand Rotary Kiln adopts countercurrent staged expansion sintering principle. The inclined rotary cylinder drives prefabricated raw material pellets to move slowly and continuously from the kiln tail to the kiln head. High-temperature flue gas generated by the burner flows reversely with materials to form a stable layered temperature field inside the kiln.
Material pellets complete three key stages in sequence: low-temperature preheating and drying to remove surface and internal moisture; medium-temperature softening and pore-forming to realize material expansion and internal porous structure formation; high-temperature constant-temperature sintering to harden the outer shell and stabilize internal pores. Finally, lightweight, high-strength spherical ceramsite sand is formed and discharged for cooling, realizing continuous automatic production.
Standard Ceramsite Sand Production Flow
Raw Material Crushing & Batching → Grinding & Homogenizing → Pelletizing & Balling → Kiln Tail Pre-Drying → Ceramsite Rotary Kiln Staged Sintering → Drum Cooling → Finished Screening & Packaging → Storage
Application Scenarios of Ceramsite Sand Rotary Kiln
Main Application Fields
Ceramsite Sand Rotary Kiln is core equipment for environmentally friendly lightweight aggregate production. The produced high-quality ceramsite sand is widely used in high-rise building lightweight concrete, thermal insulation wall materials, road and bridge backfill, garden landscape filling, and oil field fracturing proppant. It also supports industrial solid waste and municipal sludge resource treatment projects, meeting the dual needs of environmental protection and new building material production.
Classic Matching Production Line
Solid Waste/Raw Ore Crushing & Grinding → Batching & Mixing → Automatic Pelletizing → Waste Heat Pre-Drying → Ceramsite Sand Rotary Kiln High-Temp Sintering → Drum Cooling → Particle Screening & Grading → Finished Packaging & Storage
FAQs of Ceramsite Sand Rotary Kiln
Q1: What is a ceramsite sand rotary kiln used for?
A: Ceramsite sand rotary kiln is professional high-temperature sintering equipment for lightweight aggregate production. It sinters fly ash, shale, sludge and other raw materials into high-strength porous ceramsite sand, widely used in construction, oil proppant and solid waste recycling industries.
Q2: What is the sintering temperature of ceramsite rotary kiln?
A: It adopts three-stage zoned temperature control: 200-500℃ for preheating drying, 900-1100℃ for material expansion pore-forming, and 1100-1380℃ for high-temperature sintering and hardening, ensuring optimal ceramsite molding effect.
Q3: What raw materials can produce ceramsite sand?
A: Multiple recyclable raw materials are available, including fly ash, shale, coal gangue, municipal sludge, industrial tailings and clay. It realizes solid waste resource utilization with low production cost and high environmental value.
Q4: What are the advantages of rotary kiln ceramsite?
A: Rotary kiln ceramsite has uniform expansion, consistent pore structure, high compressive strength and stable quality. It supports large-scale continuous production with low defective rate, far better than traditional intermittent sintering equipment products.
Q5: Is ceramsite rotary kiln energy-saving and environmentally friendly?
A: Yes. Equipped with complete waste heat recovery and closed dust removal system, it reduces energy consumption by over 26% and meets international emission standards. Meanwhile, it realizes solid waste recycling, with outstanding environmental protection advantages.
Ceramsite Sand Rotary Kiln Of Real Project Cases
Case 1: Fly Ash Ceramsite Production Project | Indonesia Environmental Protection Plant
Project Info: The customer needed to realize local fly ash resource recycling. Our Φ2.8×60m ceramsite rotary kiln was adopted. Through precise staged expansion sintering, industrial fly ash is successfully converted into high-quality lightweight ceramsite aggregate. The finished product has uniform particle size and stable performance, which is widely used in local building lightweight concrete projects. The waste heat recovery system reduces energy consumption by 27%.
Case 2: Shale Ceramsite Proppant Project | Nigeria Building Material Base
Project Info: Traditional sintering equipment leads to uneven ceramsite expansion and low strength. After adopting our professional ceramsite rotary kiln, the 1100-1380℃ constant-temperature sintering process optimizes internal pore structure and particle hardness. The produced shale ceramsite meets oil field proppant and high-grade building aggregate standards, greatly improving product added value and market competitiveness.
Case 3: Municipal Sludge Ceramsite Recycling Project | Philippines Environmental Project
Project Info: The customer focuses on municipal sludge harmless treatment and resource utilization. Our high-adaptability ceramsite rotary kiln perfectly realizes sludge drying, decomposition and sintering molding. The treated sludge ceramsite is used for construction filling and road foundation materials, realizing waste harmless disposal and resource reuse, with remarkable environmental and economic benefits.
Technical Parameters of Ceramsite Sand Rotary Kiln
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Item
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Specification
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Machine Model
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Φ2.4×52 / Φ2.8×60 / Φ3.0×66 / Φ3.2×70m Customizable
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Processing Capacity
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130 – 1100 TPD Finished Ceramsite Sand
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Sintering Temperature Range
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Preheating: 200-500℃; Expansion: 900-1100℃; Sintering: 1100-1380℃
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Kiln Inclination
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1.5% – 3.5% Adjustable
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Rotating Speed
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0.35 – 3.8 r/min Stepless frequency conversion adjustment
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Applicable Raw Materials
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Fly ash, shale, coal gangue, sludge, tailings, clay
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Applicable Fuel
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Natural gas, coal powder, diesel, biomass
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Thermal Efficiency
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≥89% With full waste heat recovery system
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Finished Product Features
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Light weight, uniform porosity, high compressive strength, corrosion resistance
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Core Function
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Raw material preheating, pellet expansion, high-temperature sintering, pore stabilization
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Applicable Industry
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Construction lightweight concrete, building filling, oil proppant, environmental solid waste treatment
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Core Features
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Staged temperature control, uniform expansion, energy-saving, low defect rate, waste recycling
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Get Custom Ceramsite Sand Rotary Kiln Solution
Our Ceramsite Sand Rotary Kiln adopts exclusive three-stage staged expansion sintering technology, professionally customized for lightweight aggregate production. With core advantages of precise temperature control, uniform ceramsite expansion, high finished strength, significant energy-saving effect and wide raw material adaptability, it provides reliable core equipment support for global new building material and solid waste environmental protection projects, helping customers maximize resource utilization and economic benefits.
Contact us now for free process design, model selection and accurate turnkey quotation!
