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Process for preparing high-strength sulphoaluminate cement from red mud
The invention discloses a process for preparing high-strength sulphoaluminate cement from red mud, which comprises the following steps: adding nano calcium carbonate into water, adding a dispersing agent, stirring at a high speed of 1000-2000r/min for 1-2 hours, adding fly ash, feeding into a grinding machine, and mixing and grinding for 1-2 hours to obtain pretreated fly ash; drying red mud until the water content is not higher than 2wt%, adding limestone and alumina, uniformly mixing, adding the pretreated fly ash in a stirring state, and grinding until the fineness is 100-200 meshes to obtain a cement raw material; adding the cement raw material into a rotary kiln, calcining for 20-40 minutes at the calcining temperature of 1350-1450 DEG C, and cooling to room temperature to obtain cement clinker; and adding gypsum and limestone into the cement clinker, uniformly mixing, adding into a ball mill, and grinding until the specific surface area is 450-650m < 2 >/kg to obtain the high-strength sulphoaluminate cement.
本发明公开了一种采用赤泥制备高强度硫铝酸盐水泥的工艺，包括如下步骤：将纳米碳酸钙加入至水中，加入分散剂，高速搅拌1‑2h，搅拌速度为1000‑2000r/min，加入粉煤灰，送入至研磨机中混合研磨1‑2h，得到预处理粉煤灰；将赤泥烘干至含水量不高于2wt％，加入石灰石、矾土混合均匀，搅拌状态下加入预处理粉煤灰，研磨至细度为100‑200目，得到水泥生料；将水泥生料加入至回转窑内煅烧20‑40min，煅烧温度为1350‑1450℃，降温至室温，得到水泥熟料；向水泥熟料中加入石膏、石灰石，混合均匀后加入至球磨机中，磨粉至比表面积为450‑650m2/kg，得到高强度硫铝酸盐水泥。
Process for preparing high-strength sulphoaluminate cement from red mud
The invention discloses a process for preparing high-strength sulphoaluminate cement from red mud, which comprises the following steps: adding nano calcium carbonate into water, adding a dispersing agent, stirring at a high speed of 1000-2000r/min for 1-2 hours, adding fly ash, feeding into a grinding machine, and mixing and grinding for 1-2 hours to obtain pretreated fly ash; drying red mud until the water content is not higher than 2wt%, adding limestone and alumina, uniformly mixing, adding the pretreated fly ash in a stirring state, and grinding until the fineness is 100-200 meshes to obtain a cement raw material; adding the cement raw material into a rotary kiln, calcining for 20-40 minutes at the calcining temperature of 1350-1450 DEG C, and cooling to room temperature to obtain cement clinker; and adding gypsum and limestone into the cement clinker, uniformly mixing, adding into a ball mill, and grinding until the specific surface area is 450-650m < 2 >/kg to obtain the high-strength sulphoaluminate cement.
本发明公开了一种采用赤泥制备高强度硫铝酸盐水泥的工艺，包括如下步骤：将纳米碳酸钙加入至水中，加入分散剂，高速搅拌1‑2h，搅拌速度为1000‑2000r/min，加入粉煤灰，送入至研磨机中混合研磨1‑2h，得到预处理粉煤灰；将赤泥烘干至含水量不高于2wt％，加入石灰石、矾土混合均匀，搅拌状态下加入预处理粉煤灰，研磨至细度为100‑200目，得到水泥生料；将水泥生料加入至回转窑内煅烧20‑40min，煅烧温度为1350‑1450℃，降温至室温，得到水泥熟料；向水泥熟料中加入石膏、石灰石，混合均匀后加入至球磨机中，磨粉至比表面积为450‑650m2/kg，得到高强度硫铝酸盐水泥。
Process for preparing high-strength sulphoaluminate cement from red mud
一种采用赤泥制备高强度硫铝酸盐水泥的工艺
LI HAO (author) / ZHANG SHIJIE (author) / ZHANG XUEWEN (author) / LIU XIAOFEN (author) / ZHANG JINWEI (author)
2021-06-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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