In chemical production, cranes are used to lift powder materials for feeding – are there any safety regulations regarding this?
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We have a facility designed for producing coatings; it consists of a steel platform on one floor, along with 10 reaction vessels with a capacity of 20 cubic meters each. During the reaction process, 5 tons of powdered materials such as sand and calcium carbonate need to be added to each vessel. The management suggested using the crane located above the workshop to lift the powdered materials through transfer hoppers, each of which has a capacity of around 6 cubic meters. During production, the crane is used to lift these 6-cubic-meter hoppers to the top of the reaction vessels, after which the materials are added manually by opening the valves. I took into account the security risks, but could not find any **security regulations and standards in this regard. **Are there any requirements in that regard?
A smaller hopper is also okay; it’s not that it’s not allowed. Is the molten steel handled by a crane?
For powder materials, we previously used reactors with a capacity of over 10 cubic meters; we would create a vacuum and apply electrostatic forces to draw in the powder, usually in quantities of several tons. Materials like sodium bicarbonate and sodium carbonate were used in this process. The powder bags were lifted above a large funnel, and the ropes holding them down were cut using a knife. I didn’t pay attention to the specific safety regulations at that time; I hope experts can offer some guidance so that we can learn from each other*
This post was last edited by huawei on 2016-6-28 at 11:00. OP, it must take time to add material into the middle hopper, and then the material has to be removed from there as well. It is possible to consider using a ton bag unloading station to feed materials directly into the reactor. There is no need for such a large hopper; it poses no safety risks. The ton bags can be lifted directly for unloading, without the need for a intermediate hopper. It takes about 5-10 minutes to unload one ton of bags. It can also save material feeding time. Equipped with dust removal equipment to control dust. The bags are manually opened, allowing the ton bags to be reused. A ton bag costs 100 yuan, which can also help save costs.