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Refractories for Cement Kiln
• Compound bricks for lining of rotary kiln
This kind of compound brick is a new develoiped products for alumina and cement rotary kiln. It is a new lining material integrate heavy refractorywirking layer with light heat-insulating layer. It is tested and proved of more than 20% energy saving after being applied in large scale rotary kilns.
Features of product:
• Integrated heavy refractory layer with light one, easy for application,labor and effort saving.
• Good performance at high temperature; peel-off resistance; anti-corrosion; excellent heat insulation; energy saving; temperature of kiln body can be deceased by 80-120 o C.
• Double durable life compared with other bricks for rotary kiln.
With the development of technology and dry kiln, the compound brick for rotary kiln will become the more optimum products for energy saving, lower cost and prolong kiln's working life.
2 High active compound brick for cement kiln
As a new lining material for sintering zone of new dry cement kiln and a new type of green environment protection product, high active brick has the feature of good heat-shock stability, alkali resistance and wear resistance, easily stick to kiln wall, and long working life.
Item |
Unit |
index |
Al 2 O 3 ≥ |
% |
60 |
Refractoriness ≥ |
o C |
1790 |
Softening Temp. under 0.2Mpa load ≥ |
o C |
1650 |
Liner Change after re-heating at 1500 o C for 2Hrs |
% |
+0.1/-0.4 |
Bulk Density ≥ |
g/cm 3 |
2.8 |
Pressure resistance at normal Temp. ≥ |
MPa |
80 |
Heat and Shock Stability(1100 o C water cooling) ≥ |
Times |
15 |
3.Modified Alumina Brick with Phosphate
High strength at high temp.,creep-resistance, high softening temperature, wera-resistance, high heat and shock stability, being used in the top of electric furnace, reflection furnace, steel laddle, buring zone and interim zone on cement rotary kiln
item |
unit
|
index |
LPG-75 |
LPG-80 |
AI 2 O 3 ≥ |
% |
75 |
80 |
refractoriness |
o C |
1770 |
1770 |
pressure resistance at temp |
MP a |
60 |
80 |
softening temp.under0.2MP a load |
o C |
1450 |
1500 |
heat and shock stability (1100 o C water cooling) |
次
times |
20 |
20 |
buik density
|
g/cm3 |
2.7 |
2.8 |
4. Silicon-mullite Bricks
Strong stability of anti-corrosion and good wear-resistance, not easy to sticking on kiln wall, ideal refractory and lining material for cooling zone in new dry cement kiln, also ideal materail in coal or electric boiler, where eroding heavily exists.
item |
unit
|
index |
working layer |
heat-insulating layer |
AI 2 O 3 ≥ |
% |
70 |
45 |
refractoriness |
o C |
1790 |
|
softening temp.under0.2MP a load |
o C |
1600 |
|
1500*2h
linear change after re-sintering or sintering |
% |
+0.0
-0.4 |
|
buik density |
g/cm3 |
>=2.8 |
|
pressure resistance at normal temp |
MP a |
80 |
20 |
heat and shock stability (1100 o C water cooling) |
次
times |
15 |
|
heat conductivity (average temp 350±25 o C) |
W/m.K |
|
0.75 |
5. Steel Fibre reinforced pouring material
Mainly used for mouth of cement kiln, the hea-resistance chains of wet rotary kiln. The cooler and coal-spraying pine of cement kiln.
index |
unit |
Standard |
high strengthened |
FA |
FC |
FHA |
FHC |
AI 2 O 3 ≥
|
% |
79 |
8.3 |
70 |
80 |
Bending resistance at normal temp |
110 o C |
MPa
|
9.0 |
9.0 |
10.0 |
12.0 |
1100 o C |
5.5 |
6.5 |
10.0 |
12.0 |
Pressure resistance at normal temp |
110 o C |
MPa
|
70 |
70 |
70 |
80 |
1100 o C |
40 |
50 |
70 |
80 |
The strength from 1100 o C to normal temp after 5 times of sharp cooling and sharp heating
|
MPa |
4.5 |
5.5 |
5.0 |
5.0 |
Linear change after burning at 1100 o C
|
% |
± 0.4 |
± 0.5 |
± 0.4 |
± 0.5 |
6-Light Alkali-resistance castable material
Mainly used in the place where is alkali corrosion, the preheater in the pre-decomposing system of cement kiln, pipelings of decomposing furnance and pre-heating and decomposing zone of dry rotary kiln
Grade
|
type |
alkali-resistance
(the lowest degree) |
kg/m 3 ≤
dried bulk density at 110 o C |
≥ MPa
Bending-resistance |
≥ MPa
compressive strength |
test temp when linder change at constant temperaure less than 1.5% for 3h |
110 o C
stoving |
1000 o C
after burning |
110 o C
stoving |
1000 o C
after burning |
high quality product |
Q-12D |
first grade |
1650 |
4.0 |
3.5 |
35 |
30 |
1200 |
Q-13D |
first grade |
1700 |
4.0 |
3.5 |
40 |
35 |
1300 |
first grade |
Q-12 |
first grade |
1600 |
2.5 |
- |
25 |
- |
1200 |
Q-13 |
first grade |
1650 |
3.0 |
- |
30 |
- |
1300 |
7. High strength refractory castable
Mainly used in the easy damaged parts under high temp. in hot-working kiln and furnaces. The front mouth of the kiln for cement pre-decomposing, coal spraying pipe with three air tube
item |
unit |
index |
high quality product |
first grade |
AI 2 O 3 ≥ |
% |
93 |
93 |
Si 2 O 2 ≤ |
% |
0.5 |
1.0 |
The pressure resistance after being processed at different temp |
110 o C |
MPa |
80 |
60 |
1100 o C |
100 |
70 |
1500 o C |
120 |
100 |
The bending-resistance after processed at different temp |
110 o C |
MPa |
8 |
6 |
1100 o C |
9 |
7 |
1500 o C |
10 |
9 |
The linear change |
1100 o C*3h |
% |
≤ 0.5 |
± 0.5 |
1500 o C*3h |
≤ 0.5 |
± 0.5 |
bulk density at 110 o C |
g/cm 3 |
2900 |
2900 |
refractoriness |
o C |
1800 |
1800 |
8. Others Castable refractories
Alkli resistance castable, Alkli resistance high strength castable refractory, high alumina, low cement content castable, half self-flowing castable for coal spraying tube, high strength low cement content corundum castable and son on. |
