1, splash broken bits to protect furnace technology: After converter tapping, leave one part residue, add agent changing broken bits (magnesian ball or burn dolomite gently) , raise content of the MgO in broken bits, oxygen gun blows oxygen, make broken bits is splashed case, hang on bricky wall, every furnace, china is used completely almost.
2, concussion area repairs makings (big fabrics) : Bond of ＋ of bitumen of ＋ of electric frit magnesia, agglomeration magnesia
3, big fabrics uses a method: After tapping, converter arrives position sufferring iron, big shovel shovels big fabrics furnace inside, burn automatically, area of damage of automatic flow fill, the bitumen with big bottom inside furnace fabrics combines magnesia as a result of anoxic carbonization.
4, trunnion gush filling makings: Water of Ca(OH)2+ of lime of magnesia ＋ disappear, high-pressured air gush fills, a few heat help.
5, tapping mouth repairs makings: Magnesia ＋ colophony
6, mouth magnesium pounds dozen of makings character: Magnesia ＋ chromium is green
|
Brand |
MgO , % |
CaO , % |
Bulk density
G/cm 3 |
Apparent pore rate
% |
Intensity of normal temperature compression, MPa
(×24h of 110 ℃ ) |
The line after burning changes (1500 ℃ ×2h)% |
|
Magnesia brick |
≥94 |
≤2 |
≥2.95 |
≤18 |
≥60 |
- 0.2 ～ 0 |
|
Bedding face is repaired makings |
≥80 |
C, 5 ～ 10 |
≥2.20 |
|
≥3.0 |
|
|
Hearth pounds dozen of makings |
≥80 |
C, ≥10 |
≥2.60 |
|
|
|
|
Tapping mouth is repaired makings |
≥80 |
2 ～ 4 |
≥2.40 |
|
≥5.0
|
- 1 ～ 0
|
|
Magnesian carbon fireclay
|
≥90 |
C, ≥5 |
|
Granuality, Mm<0.5 |
|
|
|
Magnesium is filled character seam makings |
≥95 |
SiO 2 , ≤2 |
|
Granuality, Mm<0.5
|
|
|
|
Mouth magnesium pounds dozen of makings character
|
≥85 |
Cr 2 O 3 , ≥3.0 |
≥2.6 |
|
≥4.0 |
- 1 ～ 0 |
Commonly used and fireproof material has converter: Magnesian carbon brick, magnesium pounds dozen of makings character, magnesia brick, magnesian carbon fireclay, magnesium is repaired character makings.
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