Khi nào bạn nên sử dụng phương pháp bắn cát khô
Mặc dù phun cát ướt được ưa thích hơn vì khả năng khử bụi và tiêu thụ vật liệu thấp hơn, nhưng có một số trường hợp bắn cát khô là sự lựa chọn hiệu quả, chẳng hạn như:
- Khi bạn sử dụng các loại hạt mài nổi trong nước như hạt nhựa, vỏ quá óc chó hay lõi ngô
- Khi bạn sử dụng các loại hạt mài có thể hòa tan trong nước như soda
- Khi thời tiết quá khắc nghiệt, nhiệt độ quá thấp
Khi thực hiện phun cát, bạn phải trang bị thêm các biện pháp phòng ngừa để bảo vệ bản thân, môi trường và những người xung quanh. Dưới đây là những gì cần thực hiện:
Luôn trang bị mũ trùm đầu phun cát
Mũ trùm đầu phun cát là thiết bị quan trọng được sử dụng trong mọi quy trình phun cát làm sạch. Mũ trùm đầu được kết nối với bình lọc khí thở
- Kiểm soát khí thở bên trong mặt nạ phun cát, giúp người phun duy trì được lượng khí sạch khi thở và sự thoải mái khi thao tác phun cát
- Lớp đệm bên trong mặt nạ trùm đầu có thể giúp giảm tiếng ồn
- Mặt kính trong suốt giúp người phun thao tác dễ dàng và có thể thay thế
Tuyệt đối không sử dụng cát tự nhiên trong phun cát
Là một loại vật liệu phun truyền thống, cát tự nhiên đã bị cấm ở nhiều quốc gia. Điều này là do nó chứa silica tinh thể. Khi hít phải trong quá trình phun cát, nó có thể gây ra bệnh bụi phổi silic, một loại bệnh đặc trưng bởi sẹo và tổn thương mô phổi.
Để bảo vệ người thao tác khỏi nguy cơ này, OSHA khuyến nghị “thay thế các vật liệu chứa silica tinh thể bằng các loại hạt mài an toàn hơn”
Chúng tôi khuyên bạn nên sử dụng các loại hạt mài an toàn như bi thép, oxit nhô, hạt thủy tinh hay inox, vì nó chứa ít hơn 1% silica tự do và tuân thủ khuyến nghị của OSHA. Môi trường càng bẩn, nguy cơ hít phải càng cao, vì vậy điều này trở nên đặc biệt quan trọng trong quá trình phun cát khô.
Bắn cát khô có tốt hơn bắn cát ướt không?
Phun cát ướt và bắn cát khô đều có những ưu và nhược điểm riêng. Việc sử dụng loại phương pháp phun cát nào tùy thuộc vào mục đích của người vận hành
Sử dụng phương pháp phun ướt:
- Trong các khu dân cư, nơi việc ngăn chặn bụi là rất quan trọng
- Khi xử lý ngay các bề mặt vì sau khi phun cát ướt, bề mặt dễ bị rỉ sét lại do độ ẩm cao
- Khi sử dụng các loại hạt mài không thể tái sử dụng do ẩm ướt bị vón cục
- Ở những khu vực có quy định nghiêm ngặt về môi trường
- Khi phun làm sạch bê tông. Vì bản thân bê tông có thể giải phóng silica kết tinh vào không khí trong quá trình phun cát nên cần phải sử dụng phun cát ướt để giảm thiểu bụi
Sử dụng phương pháp bắn cát khô:
- Khi sử dụng các loại hạt mài kim loại như bi thép, oxit nhôm, hạt thủy tinh, bi inox để tối ưu hóa khả năng tái sử dụng của chúng
- Khi sử dụng các thiết bị phun cát có tích hợp hệ thống thu hồi bụi và tái sử dụng hạt mài
- Khi xử lý các bề mặt chi tiết có nhiều ngóc ngách, vì phun cát khô có thể làm sạch hiệu quả mọi ngóc ngách của vật phẩm
- Khi sử dụng môi trường hữu cơ, chẳng hạn như quả óc chó, lõi ngô và hầu hết muối nở.
- Khi thời tiết lạnh giá khiến việc nổ mìn ướt không thể thực hiện được
Growell Việt Nam chuyên sản xuất và thiết kế các loại máy bắn cát khô công nghệ cao với hơn 20 năm kinh nghiệm, đáp ứng nhu cầu làm sạch và sản lượng của bạn.
Liên hệ ngay với chúng tôi để được tư vấn chi tiết
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