ZL series self-flowing corundum castables use corundum, silicon carbide, alumina or various synthetic materials as the main materials according to different models, and are mixed with a variety of admixtures, fluidizers, high-efficiency water reducers, etc., thereby improving their wear resistance and flowability. Its main features are: without increasing the amount of water, relying solely on the flowability of the material itself, and without vibration, it can be constructed in narrow gaps and places that cannot be vibrated. It has good construction performance and quality performance. It is mainly used for circulating fluidized bed linings and difficult-to-construct locations, and is also suitable for other thermal equipment.
Corundum self-flowing castable is called vibration-free castable. It has similar performance to low-cement and low-cement castables, overcomes the similar performance of low-cement and low-cement castables, and overcomes the shortcomings of thinness and use in multiple arches and noise pollution in inconvenient construction places. Some people call it a refractory castable after low-cement and low-cement castables.
Characteristics of corundum self-flowing castable. Corundum self-flowing castable is characterized by its fluidity after mixing. Castables with this fluidity can flow and degas without applying external force. Compared with low-cement vibration castable, it has the following characteristics:
1. Self-flowing, flowing without vibration under the action of deadweight
2. Self-leveling, self-leveling when there is a guide plate
3. Smooth construction surface
4. Pumpable
5. Short construction time, no noise, good working conditions
Corundum self-flowing castable is made of corundum, special high-aluminum clinker and silicon carbide as the main materials, with composite binder, water reducer, dispersant, etc. The product has high performance, anti-scouring and anti-erosion. It has strong self-flowing properties through its own potential difference force, and the construction is very easy and convenient. It is often used in CFB boilers and other thermal equipment with heavy scouring and wear, and difficult to construct.
Product features:
Corundum self-flowing refractory castable has high performance, anti-scouring and anti-erosion.
Application field: It has strong self-flowing properties through its own potential difference force, and the construction is very easy and convenient. It is often used in CFB boilers and other thermal equipment with heavy scouring and wear, and difficult to construct.
Its physical and chemical indicators are as follows:
|
Brand/Projects and indicators |
ZL-1 |
ZL-2 |
|
|
chemical composition (%) |
A12O3 |
≥78 |
≥70 |
|
Bulk density (g/c) |
110℃×24h |
≥2.75 |
≥2.55 |
|
1000℃×3h |
≥2.70 |
≤2.50 |
|
|
Flexural strength at room temperature (Mpa) |
110℃×24h |
≥10 |
≥8.0 |
|
1000℃×3h |
≥12 |
≥9.0 |
|
|
Normal temperature compressive strength (Mpa) |
110℃×24h |
≥70 |
≥60 |
|
1000℃×3h |
≥120 |
≥100 |
|
|
Line change rate after burning (%) |
1000℃×3h |
≤-0.30 |
≤-0.40 |
|
Abrasion resistance [according to ASTM (C-704) specification] |
≤4.5 |
≤6.0 |
|
|
Thermal vibration stability (times) (1000℃×water cooling) |
≥25 |
≥20 |
|
|
Refractoriness(℃) |
≥1790 |
≥1770 |
|
|
Maximum operating temperature (℃) |
≥1600 |
≥1550 |
|
|
Self-flow value (mm) |
≥200 |
≥200 |
|
|
Thermal Conductivity w/m.k |
1.5 |
1.5 |
|
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