无机盐工业 ›› 2024, Vol. 56 ›› Issue (10): 76-85.doi: 10.19964/j.issn.1006-4990.2024-0042
收稿日期:
2024-01-22
出版日期:
2024-10-10
发布日期:
2024-11-05
作者简介:
解秘(1999— ),男,本科,助理工程师,研究方向为磷化工;E-mail:2076783404@qq.com。
基金资助:
XIE Mi1(), YANG Xiushan2, HOU Yidong1, ZHU Guihua1, LI Jianwen1
Received:
2024-01-22
Published:
2024-10-10
Online:
2024-11-05
摘要:
为了磷化工行业持续发展,减少磷矿资源浪费,探究中低品位胶磷矿利用新技术,为磷矿资源的开发利用提供新的方法。以中低品位胶磷矿酸解液为研究对象,经碳酸钙中和、石灰乳中和两步矿化和氨水氨化富集制得高品位磷精矿,实验重点探究矿化过程碳酸钙中和、石灰乳中和和氨水氨化的最佳pH,通过工艺探究富集得到高品位磷精矿,并探究提升酸解液富集过程的磷收率,实现磷资源的高效利用。研究结果表明,中低品位胶磷矿酸解液的矿化富集过程先使用碳酸钙调节pH至2.08,反应150 min,再用石灰乳调节pH为2.79,最后用氨水调节pH至3.52,可得到P2O5品位高于36%的磷精矿,磷收率约为99.5%,滤液通过浓缩后可得到合格的硝酸铵钙复合肥产品。该研究为中低品位胶磷矿的高效利用提供了新的思路和方法,对未来中低品位胶磷矿资源的开采、利用具有重大意义。
中图分类号:
解秘, 杨秀山, 侯屹东, 朱桂华, 李建闻. 中低品位胶磷矿酸解液的矿化富集技术研究[J]. 无机盐工业, 2024, 56(10): 76-85.
XIE Mi, YANG Xiushan, HOU Yidong, ZHU Guihua, LI Jianwen. Study on mineralization enrichment technology of medium and low grade collophanite acid solution[J]. Inorganic Chemicals Industry, 2024, 56(10): 76-85.
表7
氨化实验精矿分析结果
pH | w(P2O5)/% | w(CaO)/% | w(MgO)/% | w(Al2O3)/% | w(Fe2O3)/% | w(SiO2)/% | w(F-)/% | w(NO3-)/% |
---|---|---|---|---|---|---|---|---|
3.20 | 37.311 | 36.378 | 0.392 | 1.196 | 1.116 | 0.612 | 2.130 | 1.240 |
3.42 | 36.735 | 38.122 | 0.383 | 1.355 | 1.231 | 0.744 | 2.240 | 0.841 |
3.52 | 36.135 | 39.622 | 0.375 | 1.380 | 1.219 | 0.736 | 2.320 | 0.717 |
3.63 | 35.791 | 40.746 | 0.385 | 1.585 | 1.387 | 0.560 | 2.150 | 0.607 |
3.82 | 34.157 | 45.472 | 0.374 | 1.626 | 1.404 | 0.992 | 2.220 | 0.713 |
表8
氨化实验滤液和洗液分析结果
矿化 pH | 滤液 | 洗液 | |||||||
---|---|---|---|---|---|---|---|---|---|
w(P2O5)/% | w(CaO)/% | w(NO3-)/% | w(NH4+)/% | w(P2O5)/% | w(CaO)/% | w(NO3-)/% | w(NH4+)/% | ||
3.20 | 0.023 | 7.504 | 24.534 | 0.386 | 0.012 | 3.297 | 10.363 | 0.167 | |
3.42 | 0.102 | 8.282 | 24.756 | 0.501 | 0.046 | 3.747 | 10.894 | 0.225 | |
3.52 | 0.100 | 8.370 | 25.154 | 0.566 | 0.043 | 3.647 | 10.584 | 0.239 | |
3.63 | 0.017 | 7.819 | 25.509 | 0.720 | 0.022 | 3.602 | 10.850 | 0.296 | |
3.82 | 0.034 | 7.730 | 26.926 | 0.823 | 0.024 | 3.871 | 10.983 | 0.321 |
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