Description

Our company specializes in the production of various types of precast parts of castables for rotary kilns with reliable quality and stable performance. Precast parts of castables for rotary kilns are made of selected high-quality raw materials, heavy castables and thermal insulation materials in the form of composite bricks, and are manufactured through strict process flow. According to the molding method, they are divided into vibration molding, vibration pressure molding and ramming molding precast blocks; the mass of the precast blocks ranges from tens of kilograms to several tons, so they are divided into large, medium and small precast blocks; precast blocks are equipped with steel bars and anchors, so they are divided into ordinary precast blocks, steel bar precast blocks and anchor precast blocks.

Products Description

The main features of our company's precast parts of castables for rotary kilns include the following aspects:

1. Stable chemical properties: Precast parts of castables for rotary kilns have excellent chemical stability at high temperatures and are not prone to chemical reactions, thereby extending the service life of the equipment.

2. Excellent mechanical strength: The prefabricated castables for rotary kilns have high mechanical strength and toughness, can withstand greater pressure and vibration, are not easy to break and crack, and effectively ensure the normal operation of the equipment.

3. Good wear resistance: The prefabricated castables for rotary kilns have excellent wear resistance during use, which can effectively extend the life and service life of the equipment.

4. Easy to construct: The prefabricated castables for rotary kilns are in the form of prefabricated blocks, which are easy to carry, install and use. When the construction is closed, it can greatly reduce the labor intensity of workers, reduce the difficulty and cost of construction.

5. After the construction of the prefabricated castables for rotary kilns, the structural quality is stable, the construction speed is fast, and the construction period is short.

6. Users can customize products of different strengths and different specifications and sizes according to different places of use and requirements;

7. This product is an environmentally friendly product, which is non-toxic, odorless and pollution-free during use.

After the prefabricated parts of rotary kiln castables are formed, their maintenance system is the same as that of castables and plastics of the same material: when stacking, wooden strips should be placed between prefabricated blocks, with the lifting rings facing upward and the markings facing outward; when the prefabricated blocks are hoisted and built into the furnace, the gaps should be leveled and filled with refractory mud of the same material. If the gap is too large, it should be leveled with materials of the same material and hammered to make it dense.

Our prefabricated parts of rotary kiln castables are widely used in various high-temperature equipment, such as carbon needle coke, chemical hazardous waste, metallurgical kilns, glass kilns, cement kilns, etc. We strictly control quality and provide technical solutions to meet the different needs of customers.

Brand ltem	GAM-85 Corundum mullite composite brick		SGA-85 Cylon combined corundum composite brick		(GGA-80)Chrome corundum composite brick		(GGZ-80) Chrome zirconium corundum composite brick		MSL75 Corundum mullite wear resistant castable		GGAL80 Corundum wear resistant castable
Brand ltem	Heavy part	Light part	Heavy part	Light part	Heavy part	Light part	Heavy part	Light part	MSL75 Corundum mullite wear resistant castable		GGAL80 Corundum wear resistant castable
Al₂O₃ %	≥84	≥60	≥85	≥60	≥80	≥60	≥80	≥60	≥75		≥75
Cr₂O₃ %			SI4N3+ALS-ION≥3%				≥3
ZrO₂ %							≥3
Fe₂O₃ %	≤0.35	≤1	≤0.35	≤1	≤0.35	≤1	≤0.35	≤1	≤1		≤1
g/cm³ Bulk Density	2.95	≤2	2.9	≤2	3.1	≤2	3.1	≤2	110℃*24h≥2.9		110℃*24h≥3
MPa Cold Crushing Strength	≥120	≥20	≥120	≥20	≥130	≥20	≥120	≥20	110℃*24h≥90	1300℃ after burning ≥80	110℃*24h≥100
T2℃Refractoriness Under Load	≥1700		≥1700		≥1700		≥1700
(950℃, all water-cooled) times	≥30		≥30		≥30		≥30
% Permanent Linear Change	1300℃*2h±0.2		1300℃*2h±0.2		1300℃*2h±0.2		1300℃*2h±0.2		1100℃*2h±0.3		1100℃*2h±0.3
Application	Front and rear ends of rotary kiln		Rotary kiln high temperature section		Rotary kiln high temperature section		Rotary kiln high temperature section		Rotary kiln front end and kiln head cover		Rotary kiln tail

Brand/ltem	MS70 Mullite	MSL70 Corundum mullite wear resistant castable		GGAL75 Chrome corundum wear resistant castable	Acid proof castable
Al₂O₃ %	≥70	≥70		≥75	≥25
Cr₂O₃ %				≥3	SIO2≥65
Fe₂O₃ %	≤1	≤1		≤1
g/cm³ Bulk Density	≥2.55	110℃*2h≥2.9		110℃*2h≥2.9	110℃*2h≥2.9
MPa Cold Crushing Strength	≥80	110℃*24h≥90	1300℃ after burning ≥80	110℃*2h≥100	110℃*2h≥25
T2℃Refractoriness Under Load	≥1550				Acid resistance ≥98
Thermal shock stability (DIN standard) (950℃, full water cooling) times	≥20
% Permanent Linear Change	1300℃*2h±0.3	1100℃*2h±0.2		1100℃*2h±0.2
Application	Middle of the secondary combustion chamber	Upper part of secondary combustion chamber, pipeline		Second combustion chamber lower part	Quenching tower

Indicators of lining materials of rotary kiln system

Table 1

project		Performance
project		Mullite Castable DML-Ⅰ	Mullite Castable DML-Ⅱ	Mullite castable DML-Ⅲ	High alumina polyhydrogen Lightweight block
Al₂O₃ %		70	68	65	45
CaO % ≤		1.8	1.8	-	-
Bulk density(g/cm³)	110℃x24h	2.75	2.7	2.5	1.2
Compressive strength Mpa ≥	110℃x24h	65	65	60	-
	1000℃x3h	66		65	15(1300℃x3h)
	1500℃x3h	85	85	-	-
Flexural strength Mpa ≥	110℃x24h	7	8	8	-
	1000℃x3h	7	10	8	3.5(1300℃x3h)
	1500℃x3h	11	12	-	-
Line change rate %	1500℃x3h	±0.15	±0.15	-	-
Refractoriness ℃ ≥		1790	1790	1750	1650
Long-term use temperature ℃ ≥		1550	1550	1500	1450
Thermal conductivity W/m.K≤	400℃	-	-	-	0.25
Thermal conductivity W/m.K≤	1000℃	-	-	-	0.34
Application area		High temperature belt, air nozzle, material chute	Preheating zone, cooling zone	Kiln head cover, kiln tail cover, transition section	Insulation

Mullite castable-Ⅰ is used in the kiln high temperature zone, mullite castable-Ⅱ is used in the kiln preheating zone and cooling zone, and mullite castable-Ⅲ is used in the kiln head cover and kiln tail cover.

2) The physical and chemical indicators of the aluminum silicate fiber insulation board used in the rotary kiln head cover and kiln tail cover are shown in Table 2

project	Indicators
model
Al₂O₃+SiO₂, %	≥99
Al₂O₃ , %	52-55
Fe₂O₃ ,%	≤0.2
K₂0+Na₂O,%	≤0.2
Bulk density, kg/m3	≥300
Compression (25%) strength, MPa	≥1.0
Permanent Line Shrinkage (1200℃×24h),%	< 3
Thermal conductivity (hot surface 800℃), W/m.k	0.12-0.15
Classification temperature, ℃	1400
Long-term use temperature, ℃	≥1260

3) The physical and chemical indicators of refractory fiber felt are shown in Table 3.

project	High Alumina Refractory Fiber Felt
model
Al₂O₃+SiO₂, %	> 99
Al₂O₃ , %	52-55
Fe₂O₃ ,%	< 0.2
K₂0+Na₂O,%	< 0.2
Slag ball content, %	< 5
Bulk density, kg/m3	≥220
Tensile strength, MPa
Permanent linear shrinkage (1000℃×24h), %	< 3
Thermal conductivity, W/m.k	0.09-0.11(1000℃)
Classification Temperature, °C	1400
Long-term use temperature, ℃	≥1260

4) Physical and chemical indicators of high temperature calcium silicate board, see the requirements in Table 4:

project	Indicators
Brand	HCS-20
Bulk density (g/cm³)	0.2
Flexural strength (Mpa) ≥	0.4
Thermal Conductivity (W/m.k) ≤	0.05+0.00011t
Long-term use temperature (℃) ≥	1000
Linear shrinkage (1000℃,16h)% ≤	2

5) Physical and chemical indicators of high-alumina bricks, clay bricks, and lightweight insulation bricks, see the requirements in Table 5

Serial number	project	High Alumina Brick (LZ-65)	Clay Brick(N-2a)	Lightweight insulation brick(NG-1.3a)
1	Al₂O₃, %	65
2	Fe₂0₃, %(≦)
3	CaO + MgO ,%(≦)
4	Na₂O + K₂O ,% (≦)
5	Refractoriness(℃), (≥)	1790	1730
6	0.2MPa Load softening start temperature (℃), (≥)	1500	1350
7	Bulk density (g/cm³)	2.45	2.3	1.3
8	Apparent porosity, %(≦)	23
9	Room temperature compressive strength,MPa(≥)	49	30	4.5
10	Re-firing line changes, %(1500℃×2h)	＋0.1～－0.4	1400℃×2h ＋0.1～－0.5	1400℃×2h The change is no more than 2%
11	Thermal conductivity (hot surface 350℃)			0.6

6) Physical and chemical indicators of refractory castables for ash settling chambers, see the requirements in Table 6:

project		unit	DCL-50
Al₂O₃		%	≥55
SiO2		%	≥35
K2O+Na2O		%	≤0.5
Refractoriness		℃	1790
Compressive strength	110℃×24h	Mpa	≥55
Compressive strength	1000℃×3h	Mpa	≥70
Flexural strength	110℃×24h	Mpa	≥8
Flexural strength	1000℃×3h	Mpa	≥10
density	110℃×24h	g/cm³	≥2.45
Change rate after burning 1300℃×3h		%	±0.3
Thermal Conductivity 350±25℃		W/(m.K)

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Rotary Kiln Prefabricated Parts

Products Description