CN108384280A - 一种磷石膏微粉改性方法 - Google Patents

一种磷石膏微粉改性方法 Download PDF

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CN108384280A
CN108384280A CN201810141826.8A CN201810141826A CN108384280A CN 108384280 A CN108384280 A CN 108384280A CN 201810141826 A CN201810141826 A CN 201810141826A CN 108384280 A CN108384280 A CN 108384280A
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杨步雷
杨永彬
李泽钢
米林
王彩红
朱大勇
鲁圣军
何敏
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GUIZHOU KAILIN PHOSPHOGYPSUM UTILIZATION Co Ltd
Guizhou University
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Abstract

本发明公开了一种磷石膏微粉改性方法,包括如下步骤:1)将磷石膏微粉与氧化钙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A品;2)将A品进行加热搅拌处理,得B品;3)依次向B品中加入钛酸酯偶联剂、铝酸酯偶联剂、液体石蜡和硅烷偶联剂,继续进行加热搅拌处理,最后得到改性磷石膏微粉。本发明具有改性的磷石膏微粉表面性能好,且改性方法简单,效果明显的特点。

Description

一种磷石膏微粉改性方法
技术领域
本发明涉及一种磷石膏加工方法,特别是一种磷石膏微粉改性方法。
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。通过对磷石膏微粉的性能进行分析和理解,本研究者探索了一种设备简单、成本较低的磷石膏微粉的改性方法,从而改善了磷石膏微粉的表面性能,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,提供一种磷石膏微粉改性方法。本发明具有改性的磷石膏微粉表面性能好,且改性方法简单,效果明显的特点。
本发明的技术方案:一种磷石膏微粉改性方法,包括如下步骤:
1)将磷石膏微粉与氧化钙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A品;
2)将A品进行加热搅拌处理,得B品;
3)依次向B品中加入钛酸酯偶联剂、铝酸酯偶联剂、液体石蜡和硅烷偶联剂,继续进行加热搅拌处理,最后得到改性磷石膏。
前述的磷石膏微粉改性方法,包括如下步骤:
1)将磷石膏微粉与氧化钙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A品;
2)将A品进行加热搅拌处理,控制温度为110-130℃,加热时间60-80min,得B品;
3)依次向B品中加入钛酸酯偶联剂、铝酸酯偶联剂、液体石蜡和硅烷偶联剂,继续进行加热搅拌处理,控制加热温度为80-100℃,加热搅拌30-50min,最后得到改性磷石膏微粉。
前述的磷石膏微粉改性方法,所述步骤1)中,磷石膏微粉的颗粒度为10-30微米。
前述的磷石膏微粉改性方法,所述步骤1)中,混合物的pH值为10。
前述的磷石膏微粉改性方法,所述步骤2)中,搅拌温度为120℃,搅拌时间为70min。
前述的磷石膏微粉改性方法,所述步骤3)中,钛酸酯偶联剂占B品质量的0.5-1%、铝酸酯偶联剂占B品质量的1.5-2.5%、液体石蜡占B品质量的0.5%、硅烷偶联剂占B品质量的0.5%。
前述的磷石膏微粉改性方法,所述步骤3)中,铝酸酯偶联剂为固体,钛酸酯偶联剂和硅烷偶联剂为液体。
前述的磷石膏微粉改性方法,所述步骤3)中,加热温度为90℃,加热时间为40min。
本发明的有益效果
1、本发明通过上述方法将磷石膏微粉进行改性处理,改性得到的磷石膏微粉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微粉存在团聚现象,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微粉用45微米试验筛测试,其筛余物≤1%,活化度质量分数≥90%,吸油量≤67mL/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,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1:一种磷石膏微粉改性方法,步骤如下:
1)将颗粒度为20微米的磷石膏微粉与氧化钙放入搅拌加热装置中搅拌混匀,调整混合物的pH值为10,得A品;
2)将A品进行加热搅拌处理,控制温度为120℃,加热时间70min,得B品;
3)依次向B品中加入质量份为0.75%的钛酸酯偶联剂、质量份为2%的铝酸酯偶联剂、质量份为0.5%的液体石蜡和质量份为0.5%的硅烷偶联剂,继续进行加热搅拌处理,控制加热温度为90℃,加热搅拌40min,最后得到改性磷石膏微粉。
实施例2:一种磷石膏微粉改性方法,步骤如下:
1)将颗粒度为10微米的磷石膏微粉与氧化钙放入搅拌加热装置中搅拌混匀,调整混合物的pH值为9,得A品;
2)将A品进行加热搅拌处理,控制温度为110℃,加热时间80min,得B品;
3)依次向B品中加入质量份为1%的钛酸酯偶联剂、质量份为1.5%的铝酸酯偶联剂、质量份为0.5%的液体石蜡和质量份为0.5%的硅烷偶联剂,继续进行加热搅拌处理,控制加热温度为80℃,加热搅拌50min,最后得到改性磷石膏微粉。
实施例3:一种磷石膏微粉改性方法,步骤如下:
1)将颗粒度为15微米的磷石膏微粉与氧化钙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A品;
2)将A品进行加热搅拌处理,控制温度为115℃,加热时间75min,得B品;
3)依次向B品中加入质量份为0.8%的钛酸酯偶联剂、质量份为1.8%的铝酸酯偶联剂、质量份为0.5%的液体石蜡和质量份为0.5%的硅烷偶联剂,继续进行加热搅拌处理,控制加热温度为85℃,加热搅拌35min,最后得到改性磷石膏微粉。
实施例4:一种磷石膏微粉改性方法,步骤如下:
1)将颗粒度为25微米的磷石膏微粉与氧化钙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A品;
2)将A品进行加热搅拌处理,控制温度为125℃,加热时间65min,得B品;
3)依次向B品中加入质量份为0.6%的钛酸酯偶联剂、质量份为2.2%的铝酸酯偶联剂、质量份为0.5%的液体石蜡和质量份为0.5%的硅烷偶联剂,继续进行加热搅拌处理,控制加热温度为95℃,加热搅拌45min,最后得到改性磷石膏微粉。
实施例5:一种磷石膏微粉改性方法,步骤如下:
1)将颗粒度为30微米的磷石膏微粉与氧化钙放入搅拌加热装置中搅拌混匀,调整混合物的pH值为11,得A品;
2)将A品进行加热搅拌处理,控制温度为130℃,加热时间60min,得B品;
3)依次向B品中加入质量份为0.5%的钛酸酯偶联剂、质量份为2.5%的铝酸酯偶联剂、质量份为0.5%的液体石蜡和质量份为0.5%的硅烷偶联剂,继续进行加热搅拌处理,控制加热温度为100℃,加热搅拌30min,最后得到改性磷石膏微粉。

Claims (8)

1.一种磷石膏微粉改性方法,其特征在于,包括如下步骤:
1)将磷石膏微粉与氧化钙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A品;
2)将A品进行加热搅拌处理,得B品;
3)依次向B品中加入钛酸酯偶联剂、铝酸酯偶联剂、液体石蜡和硅烷偶联剂,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所述的磷石膏微粉改性方法,其特征在于,包括如下步骤:
1)将磷石膏微粉与氧化钙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A品;
2)将A品进行加热搅拌处理,控制温度为110-130℃,加热时间60-80min,得B品;
3)依次向B品中加入钛酸酯偶联剂、铝酸酯偶联剂、液体石蜡和硅烷偶联剂,继续进行加热搅拌处理,控制加热温度为80-100℃,加热搅拌30-50min,最后得到改性磷石膏微粉。
3.根据权利要求1或2所述的磷石膏微粉改性方法,其特征在于:所述步骤1)中,磷石膏微粉的颗粒度为10-30微米。
4.根据权利要求1或2所述的磷石膏微粉改性方法,其特征在于:所述步骤1)中,混合物的pH值为10。
5.根据权利要求1或2所述的磷石膏微粉改性方法,其特征在于:所述步骤2)中,搅拌温度为120℃,搅拌时间为70min。
6.根据权利要求1或2所述的磷石膏微粉改性方法,其特征在于:所述步骤3)中,钛酸酯偶联剂占B品质量的0.5-1%、铝酸酯偶联剂占B品质量的1.5-2.5%、液体石蜡占B品质量的0.5%、硅烷偶联剂占B品质量的0.5%。
7.根据权利要求1或2所述的磷石膏微粉改性方法,其特征在于:所述步骤3)中,铝酸酯偶联剂为固体,钛酸酯偶联剂和硅烷偶联剂为液体。
8.根据权利要求1或2所述的磷石膏微粉改性方法,其特征在于:所述步骤3)中,加热温度为90℃,加热时间为40min。
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CN113527911A (zh) * 2021-07-22 2021-10-22 贵州大学 一种磷石膏表面羟基化和疏水改性的方法及磷石膏
CN114854231A (zh) * 2021-06-10 2022-08-05 武汉盼云晴环保科技有限公司 一种改性磷石膏及其制备方法
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Application publication date: 20180810