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Is there anyone who can help me solve the following problem: What is the cost involved in the process design and equipment selection for this production line? The final product is a powdered substance with a particle size of 300 mesh. I. Introduction to the manufacturing process: Grinding – Mixing – Screening – Iron removal – Weighing and packaging. Brief explanation: 1. First, the semi-finished powdered materials of varying particle sizes, which have been dried in the pre-processing stage, are fed into a grinder for grinding. After grinding and screening, powdered materials of a specific particle size are selected and sent to the mixer in the next processing step. ⒉ The finely ground substance with uniform particle size, delivered from the previous process, and another powder with different properties but also extremely low specific gravity are fed into the mixer through two separate inlets; after being mixed evenly, they proceed to the next stage of the process. ⒊ Depending on the different product types and requirements, different screen mesh sizes are selected for primary, secondary, or even multiple stages of screening. ⒋ After screening, the product must have any iron impurities introduced during the processing removed. ⒌ The final step is automatic weighing and automatic packaging. II. Key points for equipment selection: 1. Assuming the equipment operates for 12 hours per day, it is necessary to ensure a production rate of 2 tons per hour on the production line. ⒉From grinding to packaging, a fully automated production process must be implemented, or the labor intensity must be reduced to the greatest extent possible. ⒊It is necessary to ensure that the air cleanliness in the production workshops and areas outside the restricted zones meets or comes close to GMP standards. III. Analysis of the difficulties in process design and equipment selection: This substance is a very light powdered material that tends to remain suspended in the air. An improper design of the process flow or inappropriate selection of equipment can lead to serious contamination of the production workshop and the surrounding environment. Therefore, the key challenge in designing the subsequent process flow is to ensure that this powdered material does not escape easily on the production line. First, mechanical conveying cannot be used, as conveyor belts cannot ensure that the material does not escape. Second, of course, it cannot be transported via water quality. Third, pneumatic conveying seems to be the only option. A large amount of heat from the previous process is used to preheat the air, which is then drawn through pipes by blowers to facilitate the flow of materials and enable dilute-phase transport. It is also necessary to maintain a certain negative pressure in the pipes to prevent the products from escaping into the air during weighing and packaging. The iron removal device can be a pipeline iron remover connected in series within the process pipeline, equipped with a mechanism for automatically removing iron filings at set intervals. QQ: 294172363