مصنع رونغ شنغ للحراريات
The cracking furnace is the core of ethylene production, and the refractory material is an important factor affecting the service life of the cracking furnace. Among them, the lining and working group of the SRT cracking furnace use refractory materials.
SRT cracking furnace
Refractories for SRT cracking furnace
In the internal high temperature area of the cracking furnace, refractory bricks are used to construct the wall and bottom of the furnace.
Refractory castables:
Refractory castables are used to fill and repair small gaps and damaged parts of furnaces.
Used for the insulation layer of the furnace.
In the external area of the pyrolysis furnace, insulation bricks are used to reduce heat conduction and heat loss.
Thermal barrier coating:
The external surfaces of the pyrolysis furnace are coated with a thermal barrier coating. These coatings are usually made of ceramic fibers, refractory cement and other materials, which can provide better heat insulation effect.
بطانية من ألياف السيراميك
| درجة حرارة التصنيف ℃ | 1140 | 1260 | 1400 | ||
| درجة | XT114 | XT126-A | XT126-ب | XT140-A | XT140-ب |
| Permanent linear change % ℃ × 24 ساعة | ≥-3 950 | ≥-3 1000 | ≥-3 1100 | ≥-3 1200 | ≥-3 1350 |
| الموصلية الحرارية W /(م · ك)500℃ | ≤0.153 | ||||
| قوة الشد MPa 25mm سمك | ＞ 0.04 | ＞ 0.05 | ＞ 0.04 | ＞ 0.06 | |
| الكثافة الظاهرية كجم / م3 | 64/96/128/160 | ||||
| ال2ا3 % | ≥44 | ≥45 | ≥45 | ≥52 | ≥36 |
| SiO2 % | ≥52 | ≥52 | ≥54 | ≥46 | ≥48 |
| ZrO2 % | / | / | / | / | ≥15 |
| Fe2ا3 % | ≤1.0 | ≤0.8 | ≤0.2 | ≤0.2 | ≤0.1 |
| ال2ا3+SiO2 % | ≥96 | ≥97 | ≥99 | ≥99 | ≥ |
| ال2ا3+SiO2+ZrO2 % | / | / | / | / | 99 |
| مقاس | 3600/7200× 610 × 20/30/50 | ||||
Refractory plastic
| غرض | Silicon carbide | زركونيوم كروم اكسيد الالمونيوم | ||
| NMK4 | NMK5 | NMK6 | NMK7 | |
| Al2O3 % | / | / | / | ≥80 |
| كربيد كربيد % | ≥40 | ≥60 | ≥70 | / |
| Cr2O3 % | / | / | / | ≥3 |
| ZrO2 % | / | / | / | ≥2 |
| الكثافة الظاهرية جم/سم3 110℃ × 24 ساعة | ≥2.4 | ≥2.5 | ≥2.6 | ≥2.8 |
| Permanent Linear Change % 1000℃ × 3 ح | -0.4~0 | -0.5~0 | -0.6~0 | -0.6~0 |
| قوة السحق البارد MPa 1000℃ × 3 ح | ≥60 | ≥70 | ≥80 | ≥90 |
| Wear resistance at room temperature cm3 1000℃ × 3 ح | ≥7 | ≥6 | ≥5 | ≥5 |
| Thermal shock stability cycle 1000℃ water cooling | ≥30 | ≥35 | ≥40 | ≥30 |
| Plasticity Index % | 15~55 | |||
| Plasticity W/(م · ك) 1000℃ | 3~5 | 5~7 | 6~8 | 2~3 |
| Maximum service temperature ℃ | 1400 | 1500 | 1600 | 1600 |
High alumina refractory castable
| فِهرِس | High Alumina Castable | |
| Al2o3 % | 65 | |
| Sio2 % | 30 | |
| Cao % | 6 | |
| Bulk density g/cm³ | 110℃，24ح | 2.5 |
| 1350℃，24ح | 2.6 | |
| Cold bending strength MPA | 110℃，24ح | 6 |
| 1350℃，24ح | 7.5 | |
| Hot bending strength MPA | 110℃，24ح | 45 |
| 1350℃，24ح | 60 | |
| 1350 Burning line rate of change | 0.2 | |
| Mixing water consumption % | 10-12% | |
| درجة حرارة التشغيل | 1400 | |
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