Description:
Luzhong low thermal conductivity anti-chipping bricks are new low density refractory bricks developed for cement rotary kiln preheating zone. To serve in severe conditions, LZR DDR series bricks have excellent mechanical strength, good resistance to thermal shock, and are highly resistant to chemical attack from vilatil alkalis and some slags. We manufacture and design DDR bricks with special raw material to meet the requirements of a wide variety of service conditions. With excellent performance, our products have been widely used in the domestic and foreign cement projects.
Dec.9th 2020. These manufacturing DDR30 (422,622,622L,422L,P22L,P+22L)plan to deliver to our European clients.
Feature:
• New synthesized alkaline-resistant materials (SiO2+K2O/Na2O→glaze layer protection): avoids the alkali corrosion and spalling.
• The low thermal conductivity can decrease the shell temperature, heat loss and energy consumption.
• The low bulk density: can decrease the kiln shell load, the mechanical stress on kiln lining, the material purchasing cost and the electricity consumption.
• Stable volume: small thermal expansion can greatly decrease the material damage due to increased thermal stress and ensure a long service life .
Application:
preheating/Calcining/safety zone of cement rotary kiln.
Chemical composition and physical properterties
| Chemical Composition |
UNIT |
SPEC |
TYPICAL |
| Al2O3 |
% |
|
32-34 |
| SiO2 |
% |
|
62-64 |
| Fe2O3 |
% |
|
1.6 |
| K2O+Na2O |
% |
|
|
| P2O5 |
% |
|
|
| Physical Properties |
UNIT |
SPEC |
TYPICAL |
| Bulk Density |
g/cm3 |
|
2.1-2.2 |
| Apparent Porosity |
% |
|
16 |
| Thermal Shock Resistance - in air at 1100 °C |
cycle |
|
16 |
| Refractoriness Under Load |
°C |
|
1320 |
| Thermal Expansion - at 1000 °C |
% |
|
0.6 |
| Cold Crushing Strength |
MPa |
|
57 |
| Thermal Conductivity - at 300 °C |
W/mK |
|
1.3 |
| Alkali Resistance -1100ºC 5hours |
|
|
1st grade |
| Note: The above datas are the representative average value measured in accordance with the test methods for general purpose and vary with the fluctuations of normal production conditions.These datas are provided as a technical service,sometimes may be adjusted, so they should not be regarded as the product index. |
Picture of products:
Package and transportation:
•Packing : Packed by sea-worthy wooden pallet + shrink plastic wrapped
Quality Control:
We are very careful in quality control so we control it from the beginning the raw material to the final products
Company Profile:
• Founded in the 1979, reformed to joint-stock in 2002
• Professional manufacturer of refractories for cement kilns, total production capacity is 200,000 t/a
• The top 3 supplier of refractories for cement kilns in China
• Complete technology provider (covering from basic to acid refractories) 70% products manufactured for cement industry
• The 1st company to invent the Magnesia Hercynite brick in China
• The 1st company to invent the Ceramic tube for preheater worldwide
Our Services:
• Whole package refractory linings design for the kilns;
• Efficient and economical refractories recommendations;
• Provide the sample properties test report from authority institute (SGS or CNAS);
• Kilns linings installation supervision, inspection, evaluation on site;
• Offer measurement of the changes of the roundness in the rotary kiln shell during operation (Ovality measurement).
• Cooperated research and development, provide the best suitable products for different working conditions of the kilns;
• Adjoining one biggest seaport of East China-Qingdao Port, convenient logistics.
Production Facility:
R&D Equipment:
ISO & patented certificates:
Exhibition & customer visit:
FAQ
Q1 : Do you provide free samples?
A1 : Yes, free samples are available, generlly speaking, the buyer shall bear all the delivery cost.
Q2 : How can you control your quality?
A2 : For each production processing, LZR have complete QC system for the chemical composition and Physical properties. After production, all the goods will be tested, and the quality certificate will be shipped along with goods.
Q3 : What is your lead time?
A3 : Delivery Time:
(1) Peak time(Nov 1st-Feb 15th next year) Within 60 days from the date of receiving the advance payment
(2) Normal time (Feb 16th-Oct 31th) Within 45 days from the date of receiving the advance payment
Q4 : What is your payments terms?
A4 : We can accept 30% deposit, 70% balance to be against the BL copy or by LC.
Q5 : Are you a trading company or manufacturer?
A5 : We are a manufacture for more than 40 years history. And you are welcome to visit us.
Audited Supplier 
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