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01 · Shaped Refractories for Rotary Kilns
JX Series Flexible Slag-Resistant Brick
- Code
- JXRK-S
- Grades
- JXRK-Ⅰ · JXRK-Ⅱ
Flexible by design. Built against slag.
- 30
- Thermal shock resistance (1100℃ water quench) cycles ≥
- 1700
- Refractoriness under load T0.6 ℃ ≥
- 150
- Cold crushing strength MPa ≥
Special flexible slag-resistant brick JXRK-Ⅰ
Special flexible slag-resistant brick JXRK-Ⅰ
Special flexible slag-resistant brick JXRK-Ⅰ
The JX series flexible slag-resistant brick is a patented product developed by Zhengzhou Jinxing Refractory specifically for the non-ferrous smelting industry. It has very good high-temperature wear resistance, spalling resistance and corrosion resistance, strong erosion resistance and resistance to coating and ring formation, and is very suitable for the reaction zone of zinc-volatilising rotary kilns and for gasifiers, reverberatory furnaces, bottom-blown furnaces, side-blown furnaces and other high-temperature furnaces.
Physical and chemical properties
| Property | Special flexible slag-resistant brick JXRK-Ⅰ | Special flexible slag-resistant brick JXRK-Ⅱ |
|---|---|---|
| Al₂O₃ % ≥ | 82 | 75 |
| SiO₂ | 7.75 | 8.6 |
| Fe₂O₃ % ≤ | 1 | 1.2 |
| Bulk density g/cm³ ≥ | 3.3 | 3.15 |
| Cold crushing strength MPa ≥ | 150 | 135 |
| Refractoriness under load T0.6 ℃ ≥ | 1700 | 1700 |
| Thermal shock resistance (1100℃ water quench) cycles ≥ | 30 | 20 |
| Apparent porosity % ≤ | 14.5 | 15 |
| Hot modulus of rupture MPa ≥ | 13 | 12 |
| Abrasion loss < | 2.85 | 2.9 |
| Permanent linear change on reheating (1450℃×3h, carbon-embedded) % | +0.1 | +0.15 |
| Service temperature ℃ ≥ | 1700 | 1700 |
| Creep in compression [1450℃×50h, carbon-embedded] % | -0.225 | -0.338 |
| Permanent linear change on reheating [1450℃×3h, carbon-embedded] | 0.02 | 0.03 |
| Application area | High-temperature reaction zone | High-temperature reaction zone |
The product is a high-tech new material independently developed using high-purity refractory raw materials and complex-phase pore-closing technology. It is suited to non-ferrous smelting furnaces penetrated by high-temperature, highly acidic slag; it resists slag and rejects penetration, fully meeting the rotary-kiln smelting processes for nickel-iron slag and lead-water slag, and it is widely used in the burning zones of high-temperature furnaces such as waste incinerators, coal-chemical and petrochemical furnaces. In the high-temperature burning zone of rotary kilns producing ceramic-grade zinc oxide mainly from nickel-iron slag, lead-water slag and lead-zinc sludge, the service period reaches 10–12 months — twice that of magnesia-alumina-chrome bricks and three times that of phosphate bricks. In zinc-volatilising rotary kilns using zinc leaching residue, the service period reaches 1095 days, ending the history of short campaign life for these kilns; in municipal-waste incinerators, aluminium-dross furnaces, industrial and medical waste incinerators, general solid-waste incinerators and hazardous-waste incinerators its service period is far longer than that of products in use at home and abroad.
Its features: good wear resistance, strong resistance to spalling, corrosion and penetration; in zinc oxide rotary furnaces using lead-iron slag, the monthly corrosion/spalling depth is no more than 15 mm.
These data are average results of production samples; typical values must not be regarded as maximum or minimum values.
Where product data differ from the goods actually supplied, the specifications in the supply contract or the actual test data of the batch prevail.
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