Effect of CaF2 and SiO2 modification on phosphorus utilisation in P-bearing slag
Effect of CaF2 and SiO2 modification on phosphorus utilisation in P-bearing slag
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CaF2和SiO2改性对含磷渣中磷利用率的影响
DOI：
10.1179/1743281214y.0000000233
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发表时间：
2015-06
影响因子：
2.1
通讯作者：
Jiang, W.
中科院分区：
文献类型：
--
作者：
Bao, Y. -P.;Yang, Q.;Wang, M.;Jiang, W.
为了回收转炉含磷渣中的磷，生产炉渣磷肥，研究了CaF2和SiO_2改性对含磷转炉渣含磷相组成、P_2O_5溶解度和磁选行为的影响。结果表明，加入CaF2后，富磷相主要为n2CaO·SiO_2-3CaO·P_2O_5(简称nC_2S-C_3P)，并伴有氟磷灰石相[Ca5(PO_4)_3F]。氟磷灰石不能在2%的柠檬酸溶液中溶解，降低了P_2O_5在炉渣中的溶解度。添加CaF2虽然可以增加富磷相中P_2O_5的含量，但可以改善反渗透相的金属化和磁化，增加磁性物质的回收率，使磷和铁分离不完全，不利于磁选法从含磷炉渣中回收磷。无氟改性渣富磷相的P_2O_5含量在31%以上，渣中P_2O_5的溶解度提高到96%，能够满足磷肥对P_2O_5含量和P_2O_5溶解度的要求。同时，无氟改性渣中87.1%的磷以非磁性物质形式存在，且大部分磷被回收利用。
In order to recycle phosphorus in P-bearing converter slag for slag phosphate fertiliser, the effect of CaF2 and SiO2 modification on P-bearing steelmaking slag on phosphorus-bearing phases, P2O5 solubility and magnetic separation behaviour has been researched. The results show that the phosphorus-rich phase is mainly n2CaO·SiO2–3CaO·P2O5 (nC2S–C3P for short) and exists along with fluorapatite phase [Ca5(PO4)3F] after the addition of CaF2. The fluorapatite cannot be dissolved in 2% citric acid solution, which decreases the P2O5 solubility in slag. Although adding CaF2 can increase the P2O5 content of phosphorus-rich phase, it can improve its metallisation and magnetisation of RO phase, increase the amount of recovered magnetic substances, and separate incompletely phosphorus and iron, therefore it is adverse to the phosphorus recovery from P-bearing slag by magnetic separation. P2O5 content of phosphorus-rich phase is more than 31% and P2O5 solubility of slag is increased to 96% in fluorine-free modified slag, which can meet the requirement of P2O5 content and P2O5 solubility of the phosphate fertiliser. Meanwhile, 87.1% of the phosphorus in the fluorine-free modified slag is contained in non-magnetic substance, and most of the phosphorus was recycled.
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影响因子：
1.8
作者：
Hironari Kubo;Kazuyo Matsubae-Yokoyama;T. Nagasaka
通讯作者：
Hironari Kubo;Kazuyo Matsubae-Yokoyama;T. Nagasaka
DOI：
10.2355/tetsutohagane1955.68.2_342
发表时间：
1982-02
影响因子：
0.3
作者：
Kimihisa Ito;M. Yanagisawa;N. Sano
通讯作者：
Kimihisa Ito;M. Yanagisawa;N. Sano
影响因子：
2.1
作者：
R. Boom;S. Riaz;K. Mills
通讯作者：
R. Boom;S. Riaz;K. Mills
影响因子：
1.8
作者：
Ken-ichi Shimauchi;S. Kitamura;H. Shibata
通讯作者：
Ken-ichi Shimauchi;S. Kitamura;H. Shibata
影响因子：
1.8
作者：
J. Diao;B. Xie;Yonghong Wang;Xu Guo
通讯作者：
J. Diao;B. Xie;Yonghong Wang;Xu Guo