Tính năng của cát trang sức
- Hình dạng hạt hình cầu: hình dạng hạt gần với hình tròn thực, bề mặt nhẵn, không có gân lõm và lồi. Tính chất lưu động và điền đầy tốt, tạo hình tốt và độ bền khuôn đúc. Độ co giãn tốt, cát dễ vệ sinh. Sử dụng ít chất kết dính hơn các khuôn cát đúc hạt khác.
- Tỷ lệ giãn nở nhiệt thấp: Tỷ lệ giãn nở nhiệt thấp giống như cát đặc biệt như quặng crom nên độ chính xác về kích thước của sản phẩm đúc cao, ít nứt và khuyết tật bề mặt, năng suất đúc cao.
- Khả năng chịu nghiền tốt: Cát Baozhu có độ chặt tốt, độ bền cao, ngay cả khi tái chế cũng ít khi bị vỡ, giảm ô nhiễm bụi trong quá trình sản xuất đúc ra môi trường sản xuất, khả năng tái chế tốt, giảm khí thải công nghiệp, có lợi cho việc bảo vệ môi trường.
- Khả năng chống cháy tốt: thành phần chính là nhôm oxit nên khả năng chống cháy rất tốt. Chịu nhiệt ≥ 1850 °C có thể áp dụng để đúc nhiều loại kim loại và hợp kim.
- Tỷ trọng khối nhỏ: tỷ trọng khối nhỏ, so với quặng crom và cát zircon (tỷ trọng) Cát Baozhu có tỷ trọng thấp hơn, trọng lượng cát sử dụng khi chế tạo cùng một mô hình (lõi) thấp hơn nhiều so với quặng crom, cát zircon, tương ứng làm giảm chi phí sản xuất, theo tỷ lệ thể tích, chỉ bằng 50% quặng crom, 30% cát zircon.
- Vật liệu trung tính: Giá trị PH 6-7, tính chất hóa học ổn định, khả năng chống ăn mòn axit và kiềm, giá trị tiêu thụ axit thấp. Có thể sử dụng cả chất kết dính axit và kiềm.
So với quặng cromit và zircon, giá của nó chỉ bằng cát zircon, quặng cromit 25 – 50%。 Đồng thời, do hạt cát hình cầu và diện tích bề mặt nhỏ nên lượng nhựa thêm vào có thể giảm 30-50%, lượng thủy tinh nước thêm vào ≤ 4%; Và giảm khuyết tật đúc do chất kết dính gây ra, nâng cao năng suất đúc
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