冷冻法硝酸磷肥副产粗硝钙液用于磷矿脱镁的研究
收稿日期: 2020-10-27
网络出版日期: 2021-07-08
基金资助
新型增效复混肥料研制与产业化(2016YFD0200402);广西植物营养工程技术研究中心创新能力建设(桂科ZY19183007)
Study on by-product crude calcium nitrate solution of frozen nitrophosphate fertilizer for phosphate rock demagnesium
Received date: 2020-10-27
Online published: 2021-07-08
针对冷冻法硝酸磷肥副产粗硝钙液中的磷进入滤渣难以回收利用导致硝酸磷肥装置产能低、胶磷矿富集技术浸取工段氨逃逸率低致使浸取液中硝酸铵含量高造成下游无法使用的问题,开展了粗硝钙液用于磷矿脱镁的研究。实验方法及最优反应条件:原矿经破碎、煅烧(煅烧温度为900~1 100 ℃,煅烧时间为1.5~3.0 h),用粗硝钙液浸取,利用粗硝钙液的热能和化学反应热控制反应温度为60~70 ℃(不需加热,节省了蒸汽消耗),反应pH为4.5~6.5,反应过程中无磷析出。在此条件下制取的磷精矿中五氧化二磷质量分数≥35%、氧化镁质量分数≤1.0%,磷回收率为100.49%~100.60%。将制取的磷精矿进行酸解,提高了酸不溶物的分离效率,可满足下游生产白色硝酸磷肥对原料的要求,副产的浸取液可用于生产氨基酸液体肥和中量元素营养母粒。该方法无尾矿产生,绿色环保,为磷矿的高效利用提供了新的研究思路。
方进 , 李菊 , 孟品品 , 黄德明 , 顾春光 , 冯军强 , 张凌云 , 王宗抗 . 冷冻法硝酸磷肥副产粗硝钙液用于磷矿脱镁的研究[J]. 无机盐工业, 2021 , 53(6) : 180 -184 . DOI: 10.19964/j.issn.1006-4990.2020-0600
In view of the fact that the phosphorus in the by-product crude calcium nitrate solution of frozen nitrophosphate en-ters the filter residue and is difficult to be recycled,the production capacity of the nitrophosphate fertilizer plant is low,and the ammonia escape rate in the leaching section of the collophanite enrichment technology is low,which leads to the high content of ammonium nitrate in the leaching solution,causing the the question of unable to be used in downstream. Study on the use of crude calcium nitrate solution for phosphate rock removal was carried out.Experimental method and optimal reac-tion conditions:the raw ore was crushed and calcined(calcination temperature was 900~1 100 ℃,calcining time was 1.5~3.0 h),leached with crude calcium nitrate solution,using the thermal energy and chemical reaction of the crude calcium ni-trate solution The thermal control reaction temperature was 60~70 ℃,which saved steam consumption and didn′t need heat-ing.The reaction pH was 4.5~6.5,and no phosphorus was precipitated during the reaction.In the phosphate concentrate pre-pared under these conditions,the mass fraction of phosphorus pentoxide was≥35%,the mass fraction of magnesium oxide was≤1.0%,and the phosphorus recovery rate was 100.49%~100.60%.The phosphate concentrate produced by this technolo-gy was acidified.The separation efficiency of acid-insoluble matter was improved,which could meet the raw material require-ments for downstream production of white nitrophosphate.The by-product extract could be used to produce amino acid liquid fertilizer and medium element nutrient masterbatch.The method had no tailings,which was green and environmentally friend-ly,and provided a new research idea for the efficient utilization of phosphate rock.
[1] | 冯军强, 王培功, 王志华. 间接冷冻法硝酸磷肥生产工艺[J]. 氮肥技术增刊, 2013:44-49. |
[2] | 张凌云, 赵国军. 冷冻法硝酸磷肥技术创新及国产化装置建设总结[J]. 化肥工业, 2019,46(5):6-11,72. |
[3] | 钟本和, 王辛龙, 张志业, 等. 次磷酸盐和亚磷酸盐介绍[J]. 无机盐工业, 2015,47(9):1-4. |
[4] | 赵国军, 冯军强, 张凌云, 等. 贵州芭田生态工程有限公司首套国产化冷冻法硝酸磷肥装置达产达标[J]. 磷肥与复肥, 2018,33(12):94-96. |
[5] | 方进, 顾春光, 任光耀, 等. 冷冻法硝酸磷肥两段中和料浆黏度变化规律研究[J]. 磷肥与复肥, 2017,32(9):12-14. |
[6] | 方进, 李菊, 陈铭, 等. 利用硝酸磷肥副产硝酸钙制备尿素硝酸钙的方法[J]. 化肥工业, 2019,46(6):30-33. |
[7] | 李杰恩, 何宾宾, 杨秀山, 等. 中低品位磷矿预处理提磷降杂技术研究[J]. 无机盐工业, 2020,52(4):33-36. |
[8] | 杨建安, 文焱炳, 张钦. 中低品位磷矿脱镁预处理技术的研究进展[J]. 广东化工, 2017,44(17):117. |
[9] | 文焱炳, 张钦, 顾春光, 等. 中低品位磷矿前处理技术的研究进展[J]. 无机盐工业, 2016,48(7):7-9. |
[10] | 张万峰, 王德强. 某中低品位钙硅质胶磷矿双反浮选工艺研究[J]. 化工矿物与加工, 2014,43(5):5-6. |
[11] | 李成秀, 程仁举, 罗惠华, 等. 贵州某中低品位胶磷矿正反浮选试验研究[J]. 化工矿物与加工, 2015,44(3):1-3. |
[12] | 文焱炳, 杨建安, 张钦, 等. 硝酸法预处理中低品位磷矿的研究进展[J]. 辽宁化工, 2017,46(8):831-833. |
[13] | Zhou F, Yang L, Zhang L, et al. Investigation of decomposition of dolomite and distribution of iodine migration during the calcina-tion-digestion process of phosphate ore[J]. Hydrometallurgy, 2019- 188:174-181. |
[14] | 赵鑫, 蔡慢弟, 董倩倩, 等. 中低品位磷矿资源高效利用机制与途径研究进展[J]. 植物营养与肥料学报, 2018,24(4):1121-1130. |
/
〈 |
|
〉 |