CN106278178A - 一种利用淤泥制造烧结砖的方法 - Google Patents

一种利用淤泥制造烧结砖的方法 Download PDF

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CN106278178A
CN106278178A CN201610686704.8A CN201610686704A CN106278178A CN 106278178 A CN106278178 A CN 106278178A CN 201610686704 A CN201610686704 A CN 201610686704A CN 106278178 A CN106278178 A CN 106278178A
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岳佐星
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Abstract

本发明公开了一种利用淤泥制造烧结砖的方法,所述絮凝剂为聚丙烯酰胺,浓度为0.3mg/mL的,有利于淤泥的脱水,使其脱水效果更好,所述混炼之后再拌水湿化,并再陈化24 h,使泥料干湿均勾,能够提高游泥的成型性能,所述搅拌中加入粘土,可以改善成型性能,使产品外观更理想,所述步骤中加入珍珠岩颗粒,可以使砖块保温性能更好,所述真空度小于‑0 .092 MPa,便于压制,烧结时使砖坯温度快速降到630℃,然后再缓慢降温至50℃,有利于提高砖块的性能,通过本方法制成的烧结砖,其强度高于普通砖强度的,市场潜力巨大,前景广阔。

Description

一种利用淤泥制造烧结砖的方法
技术领域
本发明属于建材领域,更具体地说,本发明涉及一种利用淤泥制造烧结砖的方法。
背景技术
随着淤泥产生量的不断增加,对环境、社会造成的压力不断增大,越来越引起了人们对淤泥处理的关注,世界各国对其处理处理及资源化利用也越来越重视。因国情不同,淤泥的处理方式也不尽相同。一般来说,目前国际社会基本存在的共识就是,将河道淤泥作为资源看待,利用科技手段和产业政策导向,按减量化、资源化、无害化、生态化的原则,实现资源的循环利用,变废为宝,才能从根本上解决淤泥淤积问题 。
发明内容
本发明所要解决的问题是提供一种利用淤泥制造烧结砖的方法。
为了实现上述目的,本发明采取的技术方案为:
一种利用淤泥制造烧结砖的方法,包括如下步骤:
(1)脱水
将淤泥加入一定量水搅伴均匀,再加入5-7%絮凝剂溶液,充分搅拌混合均匀,静置后10-20min过滤;
(2)翻晒
将过滤后的淤泥进翻晒,使其含水率<15%;
(3)陈化
陈化将预搅拌后的混合料置于70~80℃的蒸汽养护室陈化2~4h;
(4)混炼
先将陈化后的淤泥和粉煤灰分别进行粉碎(粉碎用锤式粉碎机),然后过0.9 mm 的筛,筛下料再按粉煤灰84-90%和淤泥烘干料的10-16%配料,投入轮碾机中进行混炼;
(5)搅拌
将混炼后的混合料投入双轴搅拌机中,在30-40℃条件下加水湿化搅拌20-30min;
(6)压制成型
将湿化搅拌后的混合料,送进制坯车间,压力制坯, 制坯压力为8~11Mpa;
(7)干燥
成型好的砖坯经过切割机切割之后分层码在干燥窑的窑车上,送入干燥窑干燥,干燥温度为80~90℃,干燥时间为6-8小时;
(8)烧结
将快速加热至150℃预热1h,以2℃/min速度升温至烧成温度:900-1000℃,保持最高温度烧制2-3h,然后退温。
优选的,所述步骤(1)絮凝剂为聚丙烯酰胺,浓度为0.3mg/mL的。
优选的,所述步骤(4)混炼之后再拌水湿化,并再陈化24 h。
优选的,所述步骤(5)中加入粘土,所述粘土加入量占混合物5-7%。
优选的,所述步骤(5)中加入珍珠岩颗粒。
优选的,所述步骤(6)真空度小于-0 .092 MPa。
优选的,使砖坯温度快速降到610~650℃,然后再缓慢降温至50℃。
有益效果:本发明提供了一种利用淤泥制造烧结砖的方法,所述絮凝剂为聚丙烯酰胺,浓度为0.3mg/mL的,有利于淤泥的脱水,使其脱水效果更好,所述混炼之后再拌水湿化,并再陈化24 h,使泥料干湿均勾,能够提高游泥的成型性能,所述搅拌中加入粘土,可以改善成型性能,使产品外观更理想,所述步骤中加入珍珠岩颗粒,可以使砖块保温性能更好,所述真空度小于-0 .092 MPa,便于压制,烧结时使砖坯温度快速降到630℃,然后再缓慢降温至50℃,有利于提高砖块的性能,通过本方法制成的烧结砖,其强度高于普通砖强度的,市场潜力巨大,前景广阔。
具体实施方式
实施例1:
一种利用淤泥制造烧结砖的方法,包括如下步骤:
(1)脱水
将淤泥加入一定量水搅伴均匀,再加入5-7%絮凝剂溶液,充分搅拌混合均匀,静置后10-20min过滤,所述絮凝剂为聚丙烯酰胺,浓度为0.3mg/mL的;
(2)翻晒
将过滤后的淤泥进翻晒,使其含水率<15%;
(3)陈化
陈化将预搅拌后的混合料置于70~80℃的蒸汽养护室陈化2~4h;
(4)混炼
先将陈化后的淤泥和粉煤灰分别进行粉碎(粉碎用锤式粉碎机),然后过0.9 mm 的筛,筛下料再按粉煤灰84-90%和淤泥烘干料的10-16%配料,投入轮碾机中进行混炼,之后再拌水湿化,并再陈化24 h;
(5)搅拌
将混炼后的混合料并加入粘土和珍珠岩颗粒,投入双轴搅拌机中,在30-40℃条件下加水湿化搅拌20-30min,所述粘土加入量占混合物5-7%;
(6)压制成型
将湿化搅拌后的混合料,送进制坯车间,压力制坯, 制坯压力为8~11Mpa,真空度小于-0 .092 MPa;
(7)干燥
成型好的砖坯经过切割机切割之后分层码在干燥窑的窑车上,送入干燥窑干燥,干燥温度为80~90℃,干燥时间为6-8小时;
(8)烧结
将快速加热至150℃预热1h,以2℃/min速度升温至烧成温度:900-1000℃,保持最高温度烧制2-3h,然后使砖坯温度快速降到610~650℃,然后再缓慢降温至50℃。
实施例2:
一种利用淤泥制造烧结砖的方法,包括如下步骤:
(1)脱水
将淤泥加入一定量水搅伴均匀,再加入5-7%絮凝剂溶液,充分搅拌混合均匀,静置后10-20min过滤,所述絮凝剂为聚丙烯酰胺,浓度为0.3mg/mL的;
(2)翻晒
将过滤后的淤泥进翻晒,使其含水率<15%;
(3)陈化
陈化将预搅拌后的混合料置于70~80℃的蒸汽养护室陈化2~4h;
(4)混炼
先将陈化后的淤泥和粉煤灰分别进行粉碎(粉碎用锤式粉碎机),然后过0.9 mm 的筛,筛下料再按粉煤灰84-90%和淤泥烘干料的10-16%配料,投入轮碾机中进行混炼,之后再拌水湿化,并再陈化24 h;
(5)搅拌
将混炼后的混合料并加入粘土和珍珠岩颗粒,投入双轴搅拌机中,在30-40℃条件下加水湿化搅拌20-30min,所述粘土加入量占混合物5-7%;
(6)压制成型
将湿化搅拌后的混合料,送进制坯车间,压力制坯, 制坯压力为8~11Mpa,真空度小于-0 .092 MPa;
(7)干燥
成型好的砖坯经过切割机切割之后分层码在干燥窑的窑车上,送入干燥窑干燥,干燥温度为80~90℃,干燥时间为6-8小时;
(8)烧结
将快速加热至150℃预热1h,以2℃/min速度升温至烧成温度:900-1000℃,保持最高温度烧制2-3h,然后使砖坯温度快速降到610~650℃,然后再缓慢降温至50℃。
实施例3:
一种利用淤泥制造烧结砖的方法,包括如下步骤:
(1)脱水
将淤泥加入一定量水搅伴均匀,再加入5-7%絮凝剂溶液,充分搅拌混合均匀,静置后10-20min过滤,所述絮凝剂为聚丙烯酰胺,浓度为0.3mg/mL的;
(2)翻晒
将过滤后的淤泥进翻晒,使其含水率<15%;
(3)陈化
陈化将预搅拌后的混合料置于70~80℃的蒸汽养护室陈化2~4h;
(4)混炼
先将陈化后的淤泥和粉煤灰分别进行粉碎(粉碎用锤式粉碎机),然后过0.9 mm 的筛,筛下料再按粉煤灰84-90%和淤泥烘干料的10-16%配料,投入轮碾机中进行混炼,之后再拌水湿化,并再陈化24 h;
(5)搅拌
将混炼后的混合料并加入粘土和珍珠岩颗粒,投入双轴搅拌机中,在30-40℃条件下加水湿化搅拌20-30min,所述粘土加入量占混合物5-7%;
(6)压制成型
将湿化搅拌后的混合料,送进制坯车间,压力制坯, 制坯压力为8~11Mpa,真空度小于-0 .092 MPa;
(7)干燥
成型好的砖坯经过切割机切割之后分层码在干燥窑的窑车上,送入干燥窑干燥,干燥温度为80~90℃,干燥时间为6-8小时;
(8)烧结
将快速加热至150℃预热1h,以2℃/min速度升温至烧成温度:900-1000℃,保持最高温度烧制2-3h,然后使砖坯温度快速降到610~650℃,然后再缓慢降温至50℃。
经过以上工艺后,分别取出样品,测量结果如下:
检测项目 实施例1 实施例2 实施例3 现有技术指标
抗压强度/MPa 16 25 18 15
抗折强度/MPa 3.8 4 3.5 2
保温性能 一般 一般
根据上述表格数据可以得出,抗压强度高和抗折强度都远远高于现有技术指标的免烧砖,保温性能也远远好于现有技术指标生产出的烧结砖,而且生产的耗能低,为企业节省了大量的资本。
本发明提供了一种利用淤泥制造烧结砖的方法,所述絮凝剂为聚丙烯酰胺,浓度为0.3mg/mL的,有利于淤泥的脱水,使其脱水效果更好,所述混炼之后再拌水湿化,并再陈化24 h,使泥料干湿均勾,能够提高游泥的成型性能,所述搅拌中加入粘土,可以改善成型性能,使产品外观更理想,所述步骤中加入珍珠岩颗粒,可以使砖块保温性能更好,所述真空度小于-0 .092 MPa,便于压制,烧结时使砖坯温度快速降到630℃,然后再缓慢降温至50℃,有利于提高砖块的性能,通过本方法制成的烧结砖,其强度高于普通砖强度的,市场潜力巨大,前景广阔。
以上所述的仅是本发明的优选实施方式,应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。

Claims (7)

1.一种利用淤泥制造烧结砖的方法,其特征在于:包括如下步骤:
(1)脱水
将淤泥加入一定量水搅伴均匀,再加入5-7%絮凝剂溶液,充分搅拌混合均匀,静置后10-20min过滤;
(2)翻晒
将过滤后的淤泥进翻晒,使其含水率<15%;
(3)陈化
陈化将预搅拌后的混合料置于70~80℃的蒸汽养护室陈化2~4h;
(4)混炼
先将陈化后的淤泥和粉煤灰分别进行粉碎(粉碎用锤式粉碎机),然后过0.9 mm 的筛,筛下料再按粉煤灰84-90%和淤泥烘干料的10-16%配料,投入轮碾机中进行混炼;
(5)搅拌
将混炼后的混合料投入双轴搅拌机中,在30-40℃条件下加水湿化搅拌20-30min;
(6)压制成型
将湿化搅拌后的混合料,送进制坯车间,压力制坯, 制坯压力为8~11Mpa;
(7)干燥
成型好的砖坯经过切割机切割之后分层码在干燥窑的窑车上,送入干燥窑干燥,干燥温度为80~90℃,干燥时间为6-8小时;
(8)烧结
将快速加热至150℃预热1h,以2℃/min速度升温至烧成温度:900-1000℃,保持最高温度烧制2-3h,然后退温。
2.按照权利要求1所述的一种利用淤泥制造烧结砖的方法,其特征在于:所述步骤(1)絮凝剂为聚丙烯酰胺,浓度为0.3mg/mL的。
3.按照权利要求1所述的一种利用淤泥制造烧结砖的方法,其特征在于:所述步骤(4)混炼之后再拌水湿化,并再陈化24 h。
4.按照权利要求1所述的一种利用淤泥制造烧结砖的方法,其特征在于:所述步骤(5)加入粘土,所述粘土加入量占混合物5-7%。
5.按照权利要求1所述的一种利用淤泥制造烧结砖的方法,其特征在于:所述步骤(5)加入珍珠岩颗粒。
6.按照权利要求1所述的一种利用淤泥制造烧结砖的方法,其特征在于:所述步骤(6)真空度小于-0 .092 MPa。
7.按照权利要求1所述的一种利用淤泥制造烧结砖的方法,其特征在于:所述步骤(8)使砖坯温度快速降到610~650℃,然后再缓慢降温至50℃。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111732310A (zh) * 2020-07-02 2020-10-02 武汉佳园环境工程有限公司 一种污泥资源化再利用的方法
CN112521170A (zh) * 2020-12-24 2021-03-19 湖北第二师范学院 一种耐火洁面高耐磨砖的制备方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111732310A (zh) * 2020-07-02 2020-10-02 武汉佳园环境工程有限公司 一种污泥资源化再利用的方法
CN112521170A (zh) * 2020-12-24 2021-03-19 湖北第二师范学院 一种耐火洁面高耐磨砖的制备方法

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