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Product Description
name | Weight (kg) |
| 50 |
Product Description:
Lightweight heat-insulating refractory castables are castable unshaped refractory materials made of lightweight refractory aggregates, refractory powders, binders and admixtures, etc., which are prepared by adding water or a solution containing binders during construction.It is a castable refractory with a true porosity of not less than 45%, also known as a lightweight refractory castable.
Product Features:
Lightweight thermal insulation refractory castables have light bulk density, high strength, good thermal insulation performance, small bulk density, low thermal conductivity, good thermal insulation performance, uniform furnace temperature, energy saving, high fire resistance, strong overall performance, and peeling resistance Good, long service life and other characteristics, can repair and process various shapes or overall furnace lining at will.
Product Usage:
It is suitable for the refractory and heat-insulating lining of petrochemical tube furnaces, as well as the refractory and heat-insulating lining of various heating furnace bottoms, furnace walls, flue chimneys, radiation chambers, convection chambers, elbow boxes, etc., and cracking of ethylene cracking devices Furnace lining.At the same time, it can also be applied to the heat insulation layer of other high-temperature kilns.
Physical and chemical indicators:
project | QJ-0.8 | QJ-1.0 | QJ-1.2 | QJ-1.4 | QJ-1.5 | QJ-1.6 | |
AL₂O₃% | ≥30 | ≥30 | ≥35 | ≥35 | ≥75 | ≥75 | |
Fe₂O₃% | ≤2 | ≤2 | ≤2 | ≤2 | ≤2 | ≤2 | |
Bulk density g／㎝³ | 110℃×24h after baking | ||||||
1000℃×3h after baking | ≤0.8 | ≤1.0 | ≤1.2 | ≤1.4 | ≤1.5 | ≤1.6 | |
Flexural strength MPa | 110℃×24h after baking | ≥1.0 | ≥1.0 | ≥1.2 | ≥1.4 | ≥1.6 | ≥1.6 |
1000℃×3h after baking | ≥1.5 | ≥1.5 | ≥2.5 | ≥3.0 | ≥5.0 | ≥4.0 | |
Compressive strength MPa | 110℃×24h after baking | ≥3.0 | ≥5.0 | ≥8.0 | ≥10 | ≥15 | ≥15 |
1000℃×3h after baking | ≥3.0 | ≥5.0 | ≥8.0 | ≥10 | ≥18 | ≥18 | |
Linear change rate% | 110℃×24h after baking | ≤﹣0.3 | ≤﹣0.3 | ≤﹣0.3 | ≤﹣0.3 | ≤﹣0.3 | ≤﹣0.3 |
1000℃×3h after baking | ≤﹣0.5 | ≤﹣0.5 | ≤﹣0.5 | ≤﹣0.5 | ≤﹣0.2 | ≤﹣0.5 | |
Thermal conductivity 350℃W/m·k | ≤0.25 | ≤0.3 | ≤0.34 | ≤0.4 | ≤0.6 | ≤0.6 | |
Lightweight heat-insulating refractory castable
