An alumina Calcination kiln is a high-temperature thermal equipment used in the alumina production process to roast aluminum hydroxide (Al(OH)₃) or intermediate products to produce high-purity alumina (Al₂O₃). The roasting process removes crystal water and enhances the physical and chemical properties of alumina, such as particle strength, specific surface area, and chemical stability, to meet the requirements of industries like metallurgy, chemicals, and ceramics.The core principle of alumina calcination is thermal decomposition and crystal transformation. Aluminum hydroxide gradually dehydrates at high temperatures and undergoes a series of crystal transformations, ultimately forming stable α-alumina.Based on structure and process characteristics, alumina roasting kilns are mainly classified into Four types:Rotary Kiln,Fluidized Bed Roasting Furnace,Gas Suspension Roasting Furnace and Tunnel Kiln.Our Shandong Luming New Materials Technology Co., LTD has specialized in refractory materials for various types of rotary kilns for over twenty years. To address the drawbacks of traditional masonry techniques, we developed an innovative "brick-and-mortar hybrid masonry process" (Patent No.: 201010130626.6).
Our Proprietary Core Technology
Our Shandong Luming New Materials Technology Co., LTD has specialized in refractory materials for various types of rotary kilns for over twenty years. To address the drawbacks of traditional masonry techniques, we developed an innovative "brick-and-mortar hybrid masonry process" (Patent No.: 201010130626.6). This construction technology has been officially included in China's national《Furnace Construction Manual》.This masonry process innovatively combines the advantages of refractory brick laying and castable monolithic pouring, while effectively overcoming the limitations of both conventional methods.Standardized refractory material design schemes have also been developed for different types of kilns.With field applications in over 100 rotary kilns and continuous iterative upgrades, this solution reliably meets diverse customer requirements.
The first-generation technology prioritized operational safety and efficiency, delivering secure and long-lasting rotary kiln refractories that significantly reduced maintenance frequency while maximizing equipment uptime. The second-generation system integrates low-thermal-conductivity materials to achieve 30% reduction in kiln shell temperature and over 10% energy savings while maintaining the safety and longevity advantages. This breakthrough directly supports clients' energy conservation, emission reduction, and green production initiatives.The current third-generation masonry technology and products utilize nanomaterials, achieving safety, longevity, energy efficiency, and environmental sustainability while further reducing the thickness of refractory materials, offering significant advantages in lightweight design.
Our Manufacturing Qualifications
Shandong Luming New Materials Technology Co., LTD is the largest manufacturer of unshaped refractory materials in Shandong Province. We have been awarded certificates for our Quality Management System, Environmental Management System, and Occupational Health and Safety Management System.We are a high-tech enterprise certified by Shandong Province;AAA"-Grade Credit Enterprise certified by the China Refractory Industry Association;Appointed as a Council Member Unit of the China Lime Association in 2013;Ranked among the Top 500 Enterprises of China's Building Materials Industry in 2014;Recognized as a Zibo Gazelle Enterprise in 2020, with its Technical Center certified as a Provincial-Level Technology Center;Recognized as a National-Level "Specialized, Sophisticated, Distinctive and Innovative" Little Giant Enterprise in August 2022. Our company possesses comprehensive production and testing capabilities, with an annual output of:100,000 tons of castable refractories,8,000 tons of corundum & mullite products,40,000 tons of high-grade high-alumina & clay products.
Our company is committed to technological innovation and customer-centric development. By pioneering new energy-saving refractory materials and innovating kiln lining designs, we dedicate ourselves to helping clients achieve energy conservation and emission reduction goals. We strive to contribute our utmost to environmental protection efforts in China and across the globe!
Our company strictly adheres to national and industry standards for refractory materials in design, production, and inspection. We also comply with international standards specified by clients to meet customized requirements.Based on the principles of safety, reliability, and cost-effectiveness, we have established a comprehensive quality management system and inspection and testing system.Our internal quality control standards encompass all critical aspects: Raw material qualification,Production process monitoring, Key control point management, Equipment maintenance & inspection,Full-process quality testing & evaluation, Closed-loop quality feedback & improvement.We implement strict raw material quality control, conducting batch-by-batch inspection with full documentation to ensure consistent material compliance.During the production process, strict quality control is enforced, with every process detail rigorously monitored and inspected. A comprehensive quality management and accountability system is implemented to ensure the overall product quality is flawless.Deploy qualified and experienced project managers and professional construction teams to carry out meticulous construction, ensuring construction quality and progress, and guaranteeing timely completion with high quality and quantity.
Our Main Applications
1.Metallurgical & Nonferrous Industry: Standard Pelletizing Rotary Kiln, Ferronickel Rotary Kiln, Ferromanganese rotary kiln, Vanadium-Titanium Rotary Kiln, Ferrochrome Rotary Kiln, Alumina Rotary Kiln, Magnesium Metal Rotary Kiln, Zinc Recovery Rotary Kiln, Iron Ore Roasting-Reduction Rotary Kiln,etc.
2.Building industry: Lime Rotary Kiln, Dolomite Calcining Kiln
3.New Energy Industry: Lepidolite Rotary Kiln, Spodumene Conversion Kiln
4.Environmental protection industry: Hazardous Waste Rotary Kiln, Hazardous Waste Rotary Kiln, Sodium Pyrophosphate Thermal Oxidizer, Sodium Pyrophosphate Thermal Oxidizer
5.Coke Oven Door Brick, Coke Dry Quenching Castable Refractory
Our Service
Personalized customization solutions:
Based on client requirements, we conduct multi-dimensional analysis covering: Usage Pain Points,Cost Control, Service Life,Energy Saving & Emission Reduction, Project Timeline,etc;We design configuration plans for different budgets and provide detailed product technical specifications and user instructions to ensure customers have a comprehensive understanding of the product;Provide customers with comprehensive end-to-end solutions including consultation, design, production, construction, after-sales service, maintenance and upkeep.
Technical Support & Training:
We Provide 24/7 customer service, ready to accept customer inquiries and feedback at any time.Based on customer needs, we can organize regular or occasional technical training sessions on product usage and maintenance to improve customers' ability to use and maintain the products.
High-efficiency supply and logistics solutions:
Flexible production mechanism, with adaptable production scheduling to maximize fulfillment of customer delivery requirements.Tiered Delivery Time Management: We provide customized logistics solutions tailored to client requirements, ensuring on-time arrival to meet diverse delivery needs.
Customized Packaging Solutions:
All delivered goods are packaged in strict compliance with the buyer's requirements as well as relevant national and industry standards.Shaped products such as refractory bricks and precast blocks are typically packaged on wooden pallets, wrapped with stretch film for sealing, and secured with plastic-steel strapping.Unshaped refractory materials are packaged in 25-50kg plastic bags, with additional outer protection using bulk bags.Our company provides customized packaging solutions including containers, wooden cases, metal boxes, and moisture-proof marine packaging, fully compliant with both local regulations and corporate requirements in your market.
After-sales Service & Continuous Improvement:
We provide complimentary technical consulting services to promptly address any issues encountered during product use.During the warranty period, any quality defects caused by our materials or workmanship will be remedied through free repair, replacement or improvement.During project operation, we systematically collect and analyze user feedback to promptly identify and rectify deficiencies, thereby continuously improving product and service quality while enhancing performance and energy efficiency.Continuously improve the quality management system and production processes to enhance both product and service quality and operational efficiency.
Refractory castables and precast shapes for high-temperature alumina, needle coke rotary kilns, secondary combustion chambers, etc.:
|
Item Mark No. |
LM-GM80 |
LM-GM75 |
LM-M70 |
LM-M65 |
LM-D50 |
LM-D45 |
|
|
AL2O3 % ≥ |
78 |
73 |
68 |
60 |
50 |
45 |
|
|
Bulk Density,(g/m3) |
2.80 |
2.70 |
2.65 |
2.55 |
2.35 |
2.30 |
|
|
Compressive Strength(MPa)≥ |
110℃X24h |
40 |
50 |
50 |
60 |
40 |
40 |
|
1100℃X3h/1300℃X3h |
80/100 |
70/120 |
70/100 |
90/100 |
60/ |
60/ |
|
|
1500℃X3h |
120 |
120 |
100 |
/ |
/ |
/ |
|
|
Modulus of Rupture(MPa)≥ |
110℃X24h |
6 |
8 |
8 |
6 |
6 |
6 |
|
1100℃X3h |
10 |
10 |
12 |
10 |
8 |
8 |
|
|
1500℃X3h |
14 |
14 |
14 |
/ |
/ |
/ |
|
|
Linear change rate ,1300℃x3h,% ± |
0.3 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
|
|
Continuous Service Temperature, ℃ |
1550 |
1500 |
1450 |
1400 |
1350 |
Acid and Alkali Resistant 1300 |
|
General roasting rotary kiln: Pyrometallurgical alumina; Alumina extraction from high-alumina coal fly ash; Reduction roasting of limonite,siderite:
|
Item Mark No. |
LM-MA85 |
LM-GN15 |
LM-MS65 |
LM-MS45 |
LM-D35 |
|
|
AL2O3 % ≥ |
70 |
45 |
60 |
40 |
30 |
|
|
MgO(SiC) % ≥ |
15 |
/ |
(8) |
(8) |
||
|
Bulk Density(g/m3) |
2.85 |
2.30 |
2.55 |
2.40 |
2.20 |
|
|
Apparent Porosity % ≤ |
15 |
15 |
||||
|
Compressive Strength(MPa)≥ |
110℃X24h |
60 |
50 |
60 |
50 |
40 |
|
1100℃X3h |
80 |
70 |
60 |
60 |
||
|
1350℃X3h |
80 |
90 |
/ |
/ |
||
|
Modulus of Rupture(MPa)≥ |
110℃X24h |
6 |
8 |
8 |
6 |
6 |
|
1100℃X3h |
10 |
10 |
10 |
8 |
||
|
1350℃X3h |
12 |
12 |
/ |
/ |
||
|
Linear change rate, 1350℃x3h, % ± |
0.5 |
0.3 |
0.5 |
0.5 |
0.5 |
|
|
Operating environment and application range |
Rotary kiln for pyrometallurgical alumina calcination; Calcination section of the rotary kiln for alumina extraction from high-alumina fly ash |
Calcination Section of Pyrometallurgical Alumina Rotary Kiln; Low-temperature section for alumina extraction from high-alumina fly ash. |
Calcining zone of rotary kiln for reduction roasting of limonite, siderite, and pyrite |
Low-temperature zone of the rotary kiln for reduction and roasting of limonite, siderite, and pyrite |
kiln hood of a rotary kiln used for the reduction and roasting of limonite, siderite, and pyrite |
|
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