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Method for preparing lightweight aggregate from silicothermic magnesium smelting slag
The invention discloses a method for preparing lightweight aggregate from silicothermic magnesium smelting slag. The method comprises the following steps of: 1, putting slowly cooled silicothermic magnesium smelting slag into a ball mill, and grinding and sieving to obtain magnesium slag powder; 2, putting the magnesium slag powder into a granulator, spraying water to the magnesium slag powder, and carrying out rotary granulation to obtain magnesium slag ceramsite; 3, pre-curing the magnesium slag ceramsite to obtain pre-cured magnesium slag ceramsite; and 4, carbonizing the pre-cured magnesium slag ceramsite in a closed container into which hot flue gas is introduced, and naturally cooling to obtain carbonized magnesium slag lightweight aggregate. According to the method, the magnesium slag ceramsite is prepared from the slowly-cooled silicothermic magnesium smelting slag as a raw material and is pre-cured and carbonized in sequence, so that a large number of small holes are formed in the magnesium slag ceramsite, the density of the carbonized magnesium slag lightweight aggregate is reduced, the diffusion efficiency of carbon dioxide gas is improved, the carbonization time is shortened, uniform carbonization is achieved, the carbonization degree is improved, the strength of the magnesium carbide slag lightweight aggregate is improved, and the high-strength and lightweight magnesium carbide slag lightweight aggregate is obtained.
本发明公开了一种硅热法炼镁镁渣制备轻集料的方法，该方法包括：一、将慢冷后的硅热法炼镁镁渣放入球磨机中研磨过筛得到镁渣粉末；二、将镁渣粉末放入造粒机中，对镁渣粉末喷水进行旋转造粒得到镁渣陶粒；三、将镁渣陶粒进行预养护得到预养护镁渣陶粒；四、将预养护镁渣陶粒放入通入热烟气的密闭容器中进行碳化，自然冷却后到碳化镁渣轻集料。本发明以慢冷后的硅热法炼镁镁渣为原料制备镁渣陶粒并依次进行预养护和碳化，使得镁渣陶粒内部生成大量的小孔，降低了碳化镁渣轻集料的密度，并提高二氧化碳气体的扩散效率，缩短碳化时间，实现均匀碳化并提高了碳化程度，增加了碳化镁渣轻集料的强度，得到高强轻质的碳化镁渣轻集料。
Method for preparing lightweight aggregate from silicothermic magnesium smelting slag
The invention discloses a method for preparing lightweight aggregate from silicothermic magnesium smelting slag. The method comprises the following steps of: 1, putting slowly cooled silicothermic magnesium smelting slag into a ball mill, and grinding and sieving to obtain magnesium slag powder; 2, putting the magnesium slag powder into a granulator, spraying water to the magnesium slag powder, and carrying out rotary granulation to obtain magnesium slag ceramsite; 3, pre-curing the magnesium slag ceramsite to obtain pre-cured magnesium slag ceramsite; and 4, carbonizing the pre-cured magnesium slag ceramsite in a closed container into which hot flue gas is introduced, and naturally cooling to obtain carbonized magnesium slag lightweight aggregate. According to the method, the magnesium slag ceramsite is prepared from the slowly-cooled silicothermic magnesium smelting slag as a raw material and is pre-cured and carbonized in sequence, so that a large number of small holes are formed in the magnesium slag ceramsite, the density of the carbonized magnesium slag lightweight aggregate is reduced, the diffusion efficiency of carbon dioxide gas is improved, the carbonization time is shortened, uniform carbonization is achieved, the carbonization degree is improved, the strength of the magnesium carbide slag lightweight aggregate is improved, and the high-strength and lightweight magnesium carbide slag lightweight aggregate is obtained.
本发明公开了一种硅热法炼镁镁渣制备轻集料的方法，该方法包括：一、将慢冷后的硅热法炼镁镁渣放入球磨机中研磨过筛得到镁渣粉末；二、将镁渣粉末放入造粒机中，对镁渣粉末喷水进行旋转造粒得到镁渣陶粒；三、将镁渣陶粒进行预养护得到预养护镁渣陶粒；四、将预养护镁渣陶粒放入通入热烟气的密闭容器中进行碳化，自然冷却后到碳化镁渣轻集料。本发明以慢冷后的硅热法炼镁镁渣为原料制备镁渣陶粒并依次进行预养护和碳化，使得镁渣陶粒内部生成大量的小孔，降低了碳化镁渣轻集料的密度，并提高二氧化碳气体的扩散效率，缩短碳化时间，实现均匀碳化并提高了碳化程度，增加了碳化镁渣轻集料的强度，得到高强轻质的碳化镁渣轻集料。
Method for preparing lightweight aggregate from silicothermic magnesium smelting slag
一种硅热法炼镁镁渣制备轻集料的方法
ZHU MIAOMIAO (author) / LI HUI (author) / LI YAN (author) / REN PULIANG (author) / SUN YONGMIN (author) / HUANG QI (author) / CAO JING (author)
2022-01-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Mineralizer Composition and Pidgeon Silicothermic Process for Smelting Magnesium
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