CN108384282A - 一种磷石膏填料改性方法 - Google Patents
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Abstract
本发明公开了一种磷石膏填料改性方法,包括如下步骤:1)将磷石膏置于研磨机中进行研磨,研磨后过筛,得A品;2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值呈碱性,得B品;3)将B品进行加热搅拌处理,得C品;4)依次向C品中加入钛酸酯偶联剂、硬脂酸和硅烷偶联剂,继续进行加热搅拌处理,最后得到改性磷石膏。本发明具有改性的磷石膏表面性能好,且改性方法简单,效果明显的特点。
Description
技术领域
本发明涉及一种磷石膏加工方法,特别是一种磷石膏填料改性方法。
背景技术
磷石膏是磷肥工业的固体废弃物,一般每生产1吨磷酸约产生5-6吨磷石膏,每生产1吨磷酸二铵排放2.5-5吨磷石膏。目前,无论国外还是国内,磷石膏的综合利用率都比较低,主要采用堆存的方式处理。我国磷石膏累计排量近亿吨,是石膏废渣中排量最大的一种,排出的磷石膏渣占用大量土地,形成渣山,严重污染环境。
目前磷石膏的产量很大,但其利用率很低。导致磷石膏利用率低的原因有很多,但最主要的是磷石膏表面性能较差,导致其利用途径比较单一。通过对磷石膏的性能进行分析和理解,本研究者探索了一种设备简单、成本较低的磷石膏填料改性方法,从而改善磷石膏的表面性能,进而拓展磷石膏的综合利用途径。
发明内容
本发明的目的在于,提供一种磷石膏填料改性方法。本发明具有改性的磷石膏填料表面性能好,且改性方法简单,效果明显的特点。
本发明的技术方案:一种磷石膏填料改性方法,包括如下步骤:
1)将磷石膏置于研磨机中进行研磨,研磨后过筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值呈碱性,得B品;
3)将B品进行加热搅拌处理,得C品;
4)依次向C品中加入钛酸酯偶联剂、硬脂酸和硅烷偶联剂,继续进行加热搅拌处理,最后得到改性磷石膏。
前述的磷石膏填料改性方法,包括如下步骤:
1)将磷石膏置于研磨机中进行研磨,研磨后过筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值为9-11,得B品;
3)将B品进行加热搅拌处理,并控制温度为110-130℃,加热搅拌处理60-80min后,得C品;
4)依次向C品中加入钛酸酯偶联剂、硬脂酸和硅烷偶联剂,继续进行加热搅拌处理,并控制温度为90-110℃,加热搅拌处理40-60min,最后得到改性磷石膏。
前述的磷石膏填料改性方法,所述步骤1)中,是将磷石膏研磨后过400目的振动筛。
前述的磷石膏填料改性方法,所述步骤2)中,混合物的pH值为10。
前述的磷石膏填料改性方法,所述步骤3)中,搅拌温度为120℃,搅拌时间为70min。
前述的磷石膏填料改性方法,所述步骤4)中,钛酸酯偶联剂占C品质量的0.5-1%、硬脂酸占C品质量的1-2%、硅烷偶联剂占C品质量的0.5%。
前述的磷石膏填料改性方法,所述步骤4)中,钛酸酯偶联剂和硬脂酸为固体,硅烷偶联剂为液体。
前述的磷石膏填料改性方法,所述步骤4)中,钛酸酯偶联剂和硬脂酸加入时分别用同等质量的工业乙醇稀释后加入。
前述的磷石膏填料改性方法,所述步骤4)中,加热温度为100℃,加热时间为50min。
本发明的有益效果
1、本发明通过上述方法将磷石膏进行改性处理,改性得到的磷石膏的表面性能得到了大大的提高,扩展了其在工业方面的应用,提高了磷石膏的利用价值。传统处理方法制得的改性磷石膏存在团聚现象,45微米试验筛筛余物通常大于3%。本发明制得的改性磷石膏用45微米试验筛测试,其筛余物≤0.3%,活化度质量分数≥90%,吸油量≤68mL/100g,符合标准要求,可用作PVC、PP等塑料产品的加工填料使用。
2、本发明的方法在处理时,设备要求低,成本低,工艺简单,但达到的效果非常明显。
具体实施方式
下面结合实施例对本发明作进一步的说明,但并不作为对本发明限制的依据。
本发明的实施例
实施例1:一种磷石膏填料改性方法,步骤如下:
1)将磷石膏置于研磨机中进行研磨,研磨后过400目筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值为10,得B品;
3)将B品进行加热搅拌处理,并控制温度为120℃,加热搅拌处理70min后,得C品;
4)依次向C品中加入质量份为0.95%的钛酸酯偶联剂、质量份为1%的硬脂酸、质量份为0.5%的硅烷偶联剂,加入前,钛酸酯偶联剂和硬脂酸分别用等质量的工业乙醇稀释,继续进行加热搅拌处理,并控制温度为100℃,加热搅拌处理50min,最后得到改性磷石膏。
实施例2:一种磷石膏填料改性方法,步骤如下:
1)将磷石膏置于研磨机中进行研磨,研磨后过400目筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值为9,得B品;
3)将B品进行加热搅拌处理,并控制温度为110℃,加热搅拌处理60min后,得C品;
4)依次向C品中加入质量份为1%的钛酸酯偶联剂、质量份为1.2%的硬脂酸、质量份为0.5%的硅烷偶联剂,加入前,钛酸酯偶联剂和硬脂酸分别用等质量的工业乙醇稀释,继续进行加热搅拌处理,并控制温度为90℃,加热搅拌处理40min,最后得到改性磷石膏。
实施例3:一种磷石膏填料改性方法,步骤如下:
1)将磷石膏置于研磨机中进行研磨,研磨后过400目筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值为9.5,得B品;
3)将B品进行加热搅拌处理,并控制温度为115℃,加热搅拌处理65min后,得C品;
4)依次向C品中加入质量份为0.65%的钛酸酯偶联剂、质量份为1.5%的硬脂酸、质量份为0.5%的硅烷偶联剂,加入前,钛酸酯偶联剂和硬脂酸分别用等质量的工业乙醇稀释,继续进行加热搅拌处理,并控制温度为95℃,加热搅拌处理45min,最后得到改性磷石膏。
实施例4:一种磷石膏填料改性方法,步骤如下:
1)将磷石膏置于研磨机中进行研磨,研磨后过400目筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值为10.5,得B品;
3)将B品进行加热搅拌处理,并控制温度为125℃,加热搅拌处理75min后,得C品;
4)依次向C品中加入质量份为0.75%的钛酸酯偶联剂、质量份为1.75%的硬脂酸、质量份为0.5%的硅烷偶联剂,加入前,钛酸酯偶联剂和硬脂酸分别用等质量的工业乙醇稀释,继续进行加热搅拌处理,并控制温度为105℃,加热搅拌处理55min,最后得到改性磷石膏。
实施例5:一种磷石膏填料改性方法,步骤如下:
1)将磷石膏置于研磨机中进行研磨,研磨后过400目筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值为11,得B品;
3)将B品进行加热搅拌处理,并控制温度为130℃,加热搅拌处理80min后,得C品;
4)依次向C品中加入质量份为0.5%的钛酸酯偶联剂、质量份为2%的硬脂酸、质量份为0.5%的硅烷偶联剂,加入前,钛酸酯偶联剂和硬脂酸分别用等质量的工业乙醇稀释,继续进行加热搅拌处理,并控制温度为110℃,加热搅拌处理60min,最后得到改性磷石膏。
Claims (9)
1.一种磷石膏填料改性方法,其特征在于,包括如下步骤:
1)将磷石膏置于研磨机中进行研磨,研磨后过筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值呈碱性,得B品;
3)将B品进行加热搅拌处理,得C品;
4)依次向C品中加入钛酸酯偶联剂、硬脂酸和硅烷偶联剂,继续进行加热搅拌处理,最后得到改性磷石膏。
2.根据权利要求1所述的磷石膏填料改性方法,其特征在于,包括如下步骤:
1)将磷石膏置于研磨机中进行研磨,研磨后过筛,得A品;
2)将A品与生石灰放入搅拌加热装置中搅拌混匀,调整混合物的pH值为9-11,得B品;
3)将B品进行加热搅拌处理,并控制温度为110-130℃,加热搅拌处理60-80min后,得C品;
4)依次向C品中加入钛酸酯偶联剂、硬脂酸和硅烷偶联剂,继续进行加热搅拌处理,并控制温度为90-110℃,加热搅拌处理40-60min,最后得到改性磷石膏。
3.根据权利要求1或2所述的磷石膏填料改性方法,其特征在于:所述步骤1)中,是将磷石膏研磨后过400目的振动筛。
4.根据权利要求1或2所述的磷石膏填料改性方法,其特征在于:所述步骤2)中,混合物的pH值为10。
5.根据权利要求1或2所述的磷石膏填料改性方法,其特征在于:所述步骤3)中,搅拌温度为120℃,搅拌时间为70min。
6.根据权利要求1或2所述的磷石膏填料改性方法,其特征在于:所述步骤4)中,钛酸酯偶联剂占C品质量的0.5-1%、硬脂酸占C品质量的1-2%、硅烷偶联剂占C品质量的0.5%。
7.根据权利要求1或2所述的磷石膏填料改性方法,其特征在于:所述步骤4)中,钛酸酯偶联剂和硬脂酸为固体,硅烷偶联剂为液体。
8.根据权利要求1或2所述的磷石膏填料改性方法,其特征在于:所述步骤4)中,钛酸酯偶联剂和硬脂酸加入时分别用同等质量的工业乙醇稀释后加入。
9.根据权利要求1或2所述的磷石膏填料改性方法,其特征在于:所述步骤4)中,加热温度为100℃,加热时间为50min。
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