JC 350-1993 in English
VALIDPhosphate bonded high alumina bricks for cement kilns
- Issued on:1993-12-16
- Implemented on:1994-10-01
- File Format:PDF
- Delivery:RFQ
| Standard No: | JC 350-1993 |
| Document status: | VALID |
| Title in English: | Phosphate bonded high alumina bricks for cement kilns |
| Title in Chinese: | 水泥窑用磷酸盐结合高铝质砖 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | RFQ |
| Issued on: | 1993-12-16 |
| Implemented on: | 1994-10-01 |
| Professional Classification: | JC-Building Material |
| Related Keywords: | phosphate bricks
high alumina bricks phosphate-bonded high-alumina bricks wear-resistant bricks lock-seam bricks |
Introduction
Analysis of the core content of the standard
This standard replaces the JC 350-83 version and specifies the technical requirements of phosphate-bonded high-alumina bricks in cement kiln systems. According to the requirements of different parts of thermal equipment, the products are divided into two series: phosphate bricks (P) and aluminum phosphate wear-resistant bricks (PA), among which the lock-seam bricks are separately marked as PC models.
Comparison of key technical indicators
| Performance parameters | P type first-class product | P type qualified product | PA type first-class product | PA type qualified product |
|---|---|---|---|---|
| Al₂O₃ content (%) | ≥75 | ≥75 | ≥77 | ≥77 |
| Compressive strength (MPa) | ≥70 | ≥60 | ≥75 | ≥65 |
| Load softening temperature (℃) | ≥1350 | ≥1300 | ≥1300 | ≥1250 |
Product application scenario analysis
Take Φ4.0m rotary kiln as an example, it is necessary to use P16 type brick (inner diameter matching 4.0-4.2m):
- Single circle usage: 140-147 pieces
- Masonry density: 700-735 pieces/m
- Key control points: hot surface chip depth ≤10mm, crack width ≤0.5mm
Standard evolution and innovation
Compared with the 1983 version of the standard, the main improvements of JC 350-93 are reflected in:
- Added aluminum phosphate wear-resistant bricks category to adapt to higher wear conditions
- Refine the dimensional tolerance system, and increase the difference error of the first-class head from ±1.5mm to ±1mm
- Improve the quantitative indicators of appearance defects, such as graded control of crack width
Implementation suggestions
Manufacturers need to pay special attention to:
- Raw material control: the Al₂O₃ content of high-alumina bauxite clinker needs to be stable at more than 75%
- Heat treatment process: 400-600℃ temperature range needs to be precisely controlled
- Quality identification: Each brick must be permanently marked with hot surface mark
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