US 12,391,574 B2
Method for continuously preparing mixed hydroxide precipitate from laterite nickel ore by hydrometallurgy
Kaihua Xu, Shenzhen (CN); Satryo Soemantri Brodjonegoro, Jakarta (ID); Tegar Mukti Aji, Jakarta (ID); Rizky Wanaldi, Jakarta (ID); Andi Syaputra Hasibuan, Jakarta (ID); Evan Wahyu Kristiyanto, Jakarta (ID); Emil Salim, Jakarta (ID); and Tao Cui, Jakarta (ID)
Assigned to PT QMB NEW ENERGY MATERIALS, Jakarta (ID); PT ESG NEW ENERGY MATERIAL, Jakarta (ID); GEM CO., LTD., Shenzhen (CN); and PT GEM INDONESIA NEW ENERGY MATERIALS, Jakarta (ID)
Appl. No. 18/869,930
Filed by PT QMB NEW ENERGY MATERIALS, Jakarta (ID); PT ESG NEW ENERGY MATERIAL, Jakarta (ID); GEM CO., LTD., Shenzhen (CN); and PT GEM INDONESIA NEW ENERGY MATERIALS, Jakarta (ID)
PCT Filed Jun. 30, 2023, PCT No. PCT/CN2023/105023
§ 371(c)(1), (2) Date Nov. 27, 2024,
PCT Pub. No. WO2025/000492, PCT Pub. Date Jan. 2, 2025.
Prior Publication US 2025/0178922 A1, Jun. 5, 2025
Int. Cl. C01G 53/05 (2025.01); C22B 3/00 (2006.01); C22B 3/44 (2006.01)
CPC C01G 53/05 (2025.01) [C22B 3/44 (2013.01); C22B 23/0461 (2013.01); C01P 2004/52 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for continuously preparing mixed hydroxide precipitate from a laterite nickel ore by hydrometallurgy, comprising the following steps:
(1) firstly, taking a laterite nickel ore solution after removal of iron and aluminum, adding a precipitant for a precipitation reaction to form a primary-precipitated mixed hydroxide precipitate crystal nucleus precipitation solution, and then performing thickening to obtain a mixed hydroxide precipitate crystal nucleus slurry;
(2) adding the precipitant to the mixed hydroxide precipitate crystal nucleus slurry for homogenization to obtain a homogenized crystal nucleus slurry mixture, and simultaneously adding the homogenized crystal nucleus slurry mixture, the precipitant, and the laterite nickel ore solution after removal of iron and aluminum into a reactor for a reaction to obtain a primary growing mixed hydroxide precipitate precipitation solution;
(3) thickening the primary growing mixed hydroxide precipitate precipitation solution, and then adding the precipitant for a precipitation reaction to obtain a secondary growing mixed hydroxide precipitate precipitation solution; and
(4) thickening the secondary growing mixed hydroxide precipitate precipitation solution, then adding the precipitant for a precipitation reaction to obtain a tertiary growing mixed hydroxide precipitate precipitation solution, taking obtaining one time of growing mixed hydroxide precipitate precipitation solution as a cycle and performing such cycle one or more times to obtain a final mixed hydroxide precipitate precipitation solution, and performing filtration, washing and drying to obtain mixed hydroxide precipitate particles;
wherein, a mass ratio of the homogenized crystal nucleus slurry mixture, to the precipitant, to the laterite nickel ore solution after removal of iron and aluminum in Step (2) is (1-8):(1-4):100.