Steel ladle light-weight heat-insulating brick and preparation method thereof
A lightweight thermal insulation and ladle technology, applied in the field of refractory materials for metallurgical ladle, can solve the problems of waste of resources, hidden dangers, high thermal conductivity, etc., and achieve the effect of reducing energy consumption and reducing hidden dangers of cracking
Inactive Publication Date: 2014-06-11
BAOSHAN IRON & STEEL CO LTD
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- Abstract
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Problems solved by technology
Due to the pursuit of high service life of ladle refractory materials, the permanent layer and working layer materials are generally relatively dense, which leads to high thermal conductivity when the ladle is filled with molten steel, and the temperature of the ladle shell is high, resulting in a great waste of resources
At the same time, the steel cladding shell is easily deformed, which affects the cracking of the lining, which brings safety hazards
Method used
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Embodiment Construction
[0015] The present invention will be further described below in conjunction with embodiment.
[0016] Table 1 is an embodiment of the composition of the ladle lightweight heat insulating brick of the present invention. Table 2 is the performance index of the embodiment of the present invention.
[0017] The preparation method of the ladle lightweight heat-insulating brick of the present invention is to vibrate while feeding materials according to the ingredients in Table 1 in the mold to fill the space of the mold and form; the formed brick is cured at 20-35°C and 60-80% humidity, After 12-24 hours, demould; the cured adobe is fired at a high temperature of 1000-1200 ℃ for 3-6 hours to obtain lightweight heat-insulating bricks.
[0018] Table 1 Unit: weight percentage
[0019]
Polyethylene foam ball
Alumina powder
water (additional)
Example 1
1%
28%
70%
1% ...
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Abstract
A steel ladle light-weight heat-insulating brick comprises the components by the weight percentage: 1-3% of poly propylene-ethylene foam balls, 10-28% of a high-aluminum micro-powder containing greater than or equal to 70% of Al2O3, 70-90% of an alumina micro-powder, 0.2-1% of a foaming agent, and 8-10% of water which is externally added. The steel ladle light-weight heat-insulating brick has the physical and chemical indicators that: the weight percentage of Al2O3 is greater than or equal to 72.00%, the compression strength is greater than or equal to 15.0 MPa, and the thermal conductivity is less than or equal to 0.6 W / s.m (700 DEG C). The steel ladle light-weight heat-insulating brick is applied between a steel ladle wall permanent layer and a working lining, has the service life synchronous to the working lining, can reduce the temperature of a steel ladle outer shell to 30-50 DEG C, greatly reduces the energy consumption, and reduces risks of steel ladle lining cracking.
Description
technical field [0001] The invention relates to the field of refractory materials used in metallurgical ladles, in particular to a light-weight heat-insulating brick for ladles and a preparation method thereof. Background technique [0002] The wall of the ladle includes a permanent layer and a working layer. The permanent layer is built with high alumina bricks or integrally poured, and the working layer is built with bricks or integrally poured. Due to the pursuit of high service life of ladle refractory materials, the permanent layer and working layer materials are generally relatively dense, which leads to high thermal conductivity when the ladle is filled with molten steel, and the temperature of the ladle shell is high, resulting in a great waste of resources. At the same time, the steel cladding shell is easily deformed, which affects the cracking of the lining, which brings potential safety hazards. In order to eliminate these adverse effects, it is a feasible solut...
Claims
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IPC IPC(8): C04B35/66C04B38/02
Inventor 王涛蒋鹏顾汉华邹伟良
Owner BAOSHAN IRON & STEEL CO LTD