Chamber wall silica brick (JG-93), head zone high alumina, regenerator fireclay. Residual quartz <1%, thermal shock ≥30 cycles. Complete data.

1. Application Overview

Coke oven chambers, combustion chambers, regenerators, and coke-side heads operate under high temperature and frequent thermal cycling.

2. Working Conditions

Chamber/combustion chamber: 1200–1350°C

Coke-side head: drops from 1200°C to 500–600°C per push (severe thermal shock)

Regenerator: 600–1000°C, sulphate attack from coke oven gas

3. Recommended Materials & Grades

4. Procurement Key Points

Silica bricks require cristobalite + tridymite ≥90%, residual quartz ≤1% (prevents cracking at 573°C).

Head zone bricks must pass 30 water quench cycles.

Regenerator fireclay must have low Fe₂O₃ to resist sulphate attack.

5. Supply & Quality Control

Silica bricks need 4–6 months lead time; confirm expansion curve matches oven design.

Request residual quartz report per batch.

Head zone: use monolithic shaped bricks to reduce joints.

6. Common Misconceptions

Myth: Use silica brick for coke-side head.
Fact: Silica has poor thermal shock resistance below 700°C; head requires high alumina or sillimanite.

Myth: Any fireclay works for regenerator.
Fact: Ordinary fireclay spalls quickly; use low-iron, sulphate-resistant grade.