



- Công bố khoa học và công nghệ Việt Nam
2
Khoa học nông nghiệp khác
Phạm Thị Mai Hương, Chu Quí Thương, Phan Thị Quyên(1)
Nghiên cứu làm giàu canxi hữu hiệu từ xỉ thải phốt pho định hướng ứng dụng làm phụ gia sản xuất phân bón
Study on effective calcium enrichment from phosphorus waste slag for application as a fertilizer additive
Khoa học và Công nghệ (Đại học Công nghiệp Hà Nội)
2022
3
137-140
1859-3585
Phosphorus waste slag is the solid waste of producing yellow phosphorus in electrical furnace. The phosphorus waste slag contains metals oxide as SiO2, Al2O3, CaO, MgO,.., in which the CaO is 40 - 50%. In this study, the effective calcium in phosphorus waste slag was separated and enriched using to product the fertilizer. The separated process was studied in pH 3, stirred with 200r.min-1, the temperature was 70oC in 50 minutes, the ration of the extracts and the phosphorus waste slag was 1:5. The results showed that the effective calcium of product obtained was high, reached to quanlity standard QCVN 01-189:2019/BTNMT as a calcium-rich fertilizer additive.
TTKHCNQG, CVt 70