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Preparation method of high-activity coal gangue micro-powder
The invention relates to a preparation method of high-activity coal gangue micro-powder, which comprises the following steps: spraying a NaOH aqueous solution of sodium silicate on coal gangue micro-powder which is obtained by calcining and is in a high-temperature state, and performing cooling to obtain the high-activity coal gangue micro-powder. According to the method, a large amount of waste heat released in the quenching process of the coal gangue micro-powder is utilized, Al2O3, NaOH and sodium silicate are subjected to a rapid chemical reaction on the surface of the coal gangue micro-powder in a high-temperature state at the same time, aluminosilicate with a three-dimensional network structure is formed, and therefore the activity of the coal gangue micro-powder is improved. The high-activity coal gangue micro-powder prepared by the invention can partially replace cement so as to increase the utilization rate of coal gangue.
本发明涉及一种高活性煤矸石微粉的制备方法，是向煅烧得到的处于高温状态下的煤矸石微粉上喷洒硅酸钠的NaOH水溶液，冷却得到高活性煤矸石微粉。本发明利用煤矸石微粉急冷过程中释放的大量余热，使Al2O3与NaOH、硅酸钠同时在高温状态下的煤矸石微粉表面快速发生化学反应，形成具有三维网状结构的铝硅酸盐，从而提高了煤矸石微粉的活性。本发明制备的高活性煤矸石微粉可以部分替代水泥，以增加煤矸石的利用率。
Preparation method of high-activity coal gangue micro-powder
The invention relates to a preparation method of high-activity coal gangue micro-powder, which comprises the following steps: spraying a NaOH aqueous solution of sodium silicate on coal gangue micro-powder which is obtained by calcining and is in a high-temperature state, and performing cooling to obtain the high-activity coal gangue micro-powder. According to the method, a large amount of waste heat released in the quenching process of the coal gangue micro-powder is utilized, Al2O3, NaOH and sodium silicate are subjected to a rapid chemical reaction on the surface of the coal gangue micro-powder in a high-temperature state at the same time, aluminosilicate with a three-dimensional network structure is formed, and therefore the activity of the coal gangue micro-powder is improved. The high-activity coal gangue micro-powder prepared by the invention can partially replace cement so as to increase the utilization rate of coal gangue.
本发明涉及一种高活性煤矸石微粉的制备方法，是向煅烧得到的处于高温状态下的煤矸石微粉上喷洒硅酸钠的NaOH水溶液，冷却得到高活性煤矸石微粉。本发明利用煤矸石微粉急冷过程中释放的大量余热，使Al2O3与NaOH、硅酸钠同时在高温状态下的煤矸石微粉表面快速发生化学反应，形成具有三维网状结构的铝硅酸盐，从而提高了煤矸石微粉的活性。本发明制备的高活性煤矸石微粉可以部分替代水泥，以增加煤矸石的利用率。
Preparation method of high-activity coal gangue micro-powder
一种高活性煤矸石微粉的制备方法
WANG FEI (author) / ZHANG HAIBO (author) / BAI LU (author) / LI XIAOKAI (author) / LI XIAOJUN (author) / JIAO LIBO (author) / LIU QIANG (author) / HUANG LUNJIE (author)
2021-03-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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