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Method for firing ceramsite based on modified sludge
The invention provides a method for firing ceramsite based on modified sludge. The method comprises the following specific steps: (1) selecting the following raw materials in percentage by weight: 50-60% of blast furnace slag, 20-30% of fly ash, 12-17% of quick lime, 2-6% of sodium bicarbonate and 1-2% of gypsum as a modification material; (2) uniformly mixing the raw materials in proportion, andgrinding for 3-5 minutes; (3) selecting the following raw materials in parts by weight: 80-85 parts of dewatered sludge and 15-20 parts of the modification material as modified sludge; (4) carrying out mixing granulating; (5) allowing the pellet particles to stand at normal temperature for 1-3 days for modification; and (6) carrying out high-temperature firing. According to the method, industrialbyproducts completely replace clay, unstable factors such as heavy metal dissolution and the like are reduced, a foaming agent does not need to be added additionally, the physical and chemical properties of the sludge are improved to a certain extent after burdening and mixing, the modification process is used for replacing presintering and roasting, the requirement for a raw material storage yardis lowered, and the energy waste in the pre-sintering and roasting processes is reduced.
本发明提供了一种基于改性污泥烧制陶粒的方法，具体步骤如下：（1）改性材料选用原料及其重量百分比含量为：高炉矿渣50～60%、粉煤灰20～30%、生石灰12～17%、碳酸氢钠2～6%，石膏1～2%；（2）将各原料按比例混合均匀后，粉磨3～5min；（3）改性污泥选用原料及其重量份数配比为：脱水污泥80～85份，改性材料15～20份；（4）混合造粒；（5）料球颗粒常温下静置1～3d进行改性；（6）高温烧制；本发明由工业副产品完全代替黏土，减少重金属溶出等不稳定因素产生，且无需另外添加起泡剂，使污泥的物理化学性质通过配料混合后有一定的改进，利用改性过程代替预烧、焙烧，降低对原材料堆场要求，且减少预烧、焙烧过程中的能源浪费。
Method for firing ceramsite based on modified sludge
The invention provides a method for firing ceramsite based on modified sludge. The method comprises the following specific steps: (1) selecting the following raw materials in percentage by weight: 50-60% of blast furnace slag, 20-30% of fly ash, 12-17% of quick lime, 2-6% of sodium bicarbonate and 1-2% of gypsum as a modification material; (2) uniformly mixing the raw materials in proportion, andgrinding for 3-5 minutes; (3) selecting the following raw materials in parts by weight: 80-85 parts of dewatered sludge and 15-20 parts of the modification material as modified sludge; (4) carrying out mixing granulating; (5) allowing the pellet particles to stand at normal temperature for 1-3 days for modification; and (6) carrying out high-temperature firing. According to the method, industrialbyproducts completely replace clay, unstable factors such as heavy metal dissolution and the like are reduced, a foaming agent does not need to be added additionally, the physical and chemical properties of the sludge are improved to a certain extent after burdening and mixing, the modification process is used for replacing presintering and roasting, the requirement for a raw material storage yardis lowered, and the energy waste in the pre-sintering and roasting processes is reduced.
本发明提供了一种基于改性污泥烧制陶粒的方法，具体步骤如下：（1）改性材料选用原料及其重量百分比含量为：高炉矿渣50～60%、粉煤灰20～30%、生石灰12～17%、碳酸氢钠2～6%，石膏1～2%；（2）将各原料按比例混合均匀后，粉磨3～5min；（3）改性污泥选用原料及其重量份数配比为：脱水污泥80～85份，改性材料15～20份；（4）混合造粒；（5）料球颗粒常温下静置1～3d进行改性；（6）高温烧制；本发明由工业副产品完全代替黏土，减少重金属溶出等不稳定因素产生，且无需另外添加起泡剂，使污泥的物理化学性质通过配料混合后有一定的改进，利用改性过程代替预烧、焙烧，降低对原材料堆场要求，且减少预烧、焙烧过程中的能源浪费。
Method for firing ceramsite based on modified sludge
一种基于改性污泥烧制陶粒的方法
ZHANG FAWEN (author) / CHEN CHENHUI (author) / ZHU XIUHONG (author) / YANG JIANTAO (author) / YUAN YUAN (author) / ZHANG JIANWEI (author)
2020-11-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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