NGHIÊN CỨU QUÁ TRÌNH CHẾ TẠO KẼM SUNFAT TỪ XỈ MẠ KẼM NHÚNG NÓNG CHỨA CLO = STUDY ON THE PREPARATION OF ZINC SULFATE F-ROM CHLORIDE- CONTAINING HOT DIP GALVANIZING ASH

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Tác giả: Văn Hoàn Nguyễn, Văn Mạnh Nguyễn, Xuân Cảnh Nguyễn, Xuân Huy Nguyễn, Thị Quyên Phan, Quang Hải Trần, Minh Khôi Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Đại học Công nghiệp Hà Nội, 2020

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 473734

Thêm vào giỏ

Nghiên cứu này hướng tới xây dựng và hoàn thiện quá trình chế tạo kẽm sunfat từ xỉ mạ kẽm nhúng nóng chứa clo. Trước hết thủy phân xỉ kẽm trong dung dịch axit sunfuric để tạo ra dung dịch kẽm sunfat. Các tạp chất chủ yếu trong dung dịch bao gồm sắt, nhôm được loại bỏ bằng phương pháp kết tủa điều chỉnh pH với tác nhân trung hòa là dung dịch NaOH 10%, đồng (I) oxit được sử dụng để loại tạp chất clorua. Kết quả cho thấy điều kiện thủy phân kẽm thích hợp là nồng độ axit sunfuric 2M, nhiệt độ 55oC, tỷ lệ lỏng/rắn 8/1, thời gian 90 phút. Ở điều kiện này, hiệu suất tách kẽm đạt 98,05%. Kẽm sunfat kết tinh từ dung dịch sau khi tinh chế có độ tinh khiết lên tới 98,37%. This study aimed to develop a zinc sulfate preparation process f-rom chloride-containing zinc ash formed during the hot dip galvanizing. Zinc sulfate solution was formed by the hydrometallurgy of zinc ash in sulfuric acid. The main impurities included in the solution such as iron and aluminum were removed by pH-controlled precipitation using 10% NaOH solution as a neutralizing agent. In order to remove chloride, copper (I) oxide was used. The results showed that the hydrometallurgy of zinc ash achieved the highest yield (98.05% zinc was extracted) under the conditions sulfuric acid concentration of 2 M, temperature of 55oC, liquid to solid ratio of 8/1 and leaching time of 90 min. Zinc sulfate with the purity of 98.37% was crystallized f-rom refined - zinc sulfate solution.

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