Proses Baharu untuk Pemulihan Cekap Logam Berharga daripada Penyelesaian Mengandungi Kalsium Magnesium
As the demand for lithium-ion batteries continues to expand, the demand for lithium cobalt oxide, litium nikel oksida, and lithium nickel cobalt manganese oxide as cathode materials for lithium-ion batteries has also greatly increased. Pada masa ini, abundant mineral resources are almost exhausted, while the number of waste lithium-ion batteries is increasing rapidly. If waste lithium batteries are not recycled, it will result in a significant waste of valuable metal resources. Oleh itu, achieving the recycling and reuse of nickel cobalt manganese lithium metal is a necessary means of properly treating waste lithium-ion batteries.
Pada masa ini, there are many methods for recovering valuable metals from the leaching solution of waste lithium-ion batteries, such as chemical precipitation method, hydrometallurgy method, dan lain-lain. Namun begitu, when multiple metals coexist, using chemical precipitation method to recover nickel, kobalt, and manganese in the cathode material of waste ternary lithium-ion batteries will cause a small amount of calcium and magnesium co deposition, resulting in a decrease in the purity of the recovered products. Hydrometallurgy has the characteristics of low energy consumption, low pollution, high resource utilization rate, and high product purity, which has been continuously studied and developed by many researchers.
Pada masa ini, in the method of recovering valuable metals from waste lithium batteries using hydrometallurgical processes, P204 extractant is generally used to first recover Mn and a small amount of Fe, Zn, Cu, Al. After reverse extraction, a manganese sulfate solution is obtained. After further purification, qualified Mn products are obtained. Then, P507 extractant is used to extract Co from the raffinate, and CoSO4 solution is obtained after reverse extraction crystallization to obtain CoSO4 · 7H2O product. Akhirnya, P507 is used to extract Ni from the raffinate, After reverse extraction crystallization, NiSO4 · 6H2O product was obtained. Namun begitu, some leaching processes introduce some calcium and magnesium, which makes it impossible for P507 to directly prepare qualified NiSO4 · 6H2O products. Oleh itu, C272 needs to be further used to purify nickel sulfate. This process involves multiple extractions, which increases the cost of separately recovering nickel, kobalt, mangan, and lithium elements, and the separation process is also relatively long.
The order of pH 50 for P204 extraction of metal ions is Ca2+>Mn2+>Mg2+, Co2+, Ni2+. Oleh itu, P204 extraction cannot simultaneously achieve the separation of Mn2+, Co2+, Ni2+from Ca2+, Mg2+.
The DY319 extractant produced by our company has the following characteristics:
1. It is possible to extract Ni2+before extracting Mg2+and Ca2+, which has a good separation effect on Ni2+and Mg2+, thus achieving the goal of one-step purification of NiSO4;
2. Capable of synchronously extracting Co2+and Ni2+, with high extraction efficiency and good separation effect with Mg2+, Ca2+, Li+;
3. This product is easy to extract and can achieve efficient recovery of Co2+and Ni2+;
4. In actual use, there is less loss, keterlarutan air yang rendah, reduced operating costs, and improved economic benefits;
5. In the early stage, impurities such as Fe3+, Zn2+, Cu2+, Al2+, Cr2+, Cd2+, Pb2+can be removed completely, and synchronous extraction of Co2+, Ni2+, and Mn2+can also be achieved.
The extraction sequence of metal ions pH50 by DY319 is Cu2+>Zn2+>Ni2+≈ Co2+≈ Mn2+>Mg2+≈ Ca2+, which can achieve the separation of Ni2+, Co2+, Mn2+from Mg2+, Ca2+.
If you are interested in our experiment, please contact us for detailed experimental data.
Kami khas untuk memberi tumpuan kepada R&D reagen pengekstrakan logam, produk utama kami seperti di bawah:
- DZ988N/DZ973N/DZ902 reagen pengekstrakan pelarut kuprum.
- DZ272 Nikel, kobalt, mangan, dan pengekstrak pemisahan magnesium.
- DY319 pengekstrakan bersama nikel kobalt kecekapan tinggi.
- DY377 pengekstrak pemisahan nikel dan berlian yang cekap.
- DY366 pengekstrak kobalt nikel termaju baharu.
- P204 (D2EHPA atau HDEHP) pengekstrak.
- DY301, DY302 untuk pemulihan bahan api habis nuklear.
- Reagen pengekstrakan lain untuk pengekstrak Vanadium, Pengekstrak litium, Pengekstrak fero dan pengekstrak nadir bumi.
