Could someone please provide their opinion on the process of dewatering a slurry using screw-press filtering equipment?

Dear Hamid Javaheri please recommend if answer was helpful

Opinions on the process of dewatering a slurry using screw-press filtering equipment can vary depending on the specific context and the goals of the operation. However, here are some common opinions and considerations related to this process:

Efficiency: Many professionals in industries like wastewater treatment, agriculture, and food processing find screw-press filtering equipment to be an efficient and effective way to dewater slurry. It can remove a significant amount of water from the slurry, reducing its volume and making it easier to handle or dispose of.

Cost-Effectiveness: Screw-press dewatering equipment is often viewed as a cost-effective solution compared to other dewatering methods. It can lower disposal costs by reducing the volume of waste that needs to be transported and treated.

Environmental Benefits: Some individuals and organizations appreciate screw-press dewatering for its environmental benefits. It can help reduce the environmental footprint of slurry disposal by minimizing the amount of water that needs to be treated or discharged.

Maintenance: Maintenance requirements can be a concern for some users. Like any mechanical equipment, screw-press filters require regular maintenance to ensure they operate efficiently and reliably. Opinions on this aspect may vary depending on the ease of maintenance and the downtime it entails.

Processing Rate: The processing rate of screw-press filtering equipment may be a point of discussion. Some users might find it suitable for their needs, while others with large-scale operations might need higher-capacity equipment or multiple units to meet their production requirements.

Dewatering Efficiency: The efficiency of dewatering can vary depending on the characteristics of the slurry, including its solids content, particle size, and chemical composition. Users' opinions may be influenced by how well the screw press performs with their specific slurry type.

Space and Footprint: The physical footprint of the equipment can be a consideration, especially in facilities with limited space. Some users might appreciate compact screw-press systems that can fit into smaller areas.

Operator Skill: Opinions on the process may also depend on the skill and experience of the operators. Proper operation of screw-press filtering equipment may require training and expertise to achieve optimal results.

Alternative Methods: Some users may have experience with alternative dewatering methods, such as centrifugation, belt presses, or filter presses, and may compare screw-press dewatering to these alternatives when forming their opinions.

In summary, opinions on the process of dewatering a slurry using screw-press filtering equipment can vary based on individual experiences, industry-specific requirements, and the specific goals of the dewatering operation. It is important to carefully evaluate the suitability of screw-press equipment for a particular application and consider factors like efficiency, cost-effectiveness, maintenance, and environmental impact when forming an opinion on its use.

Hamid Javaheri

Tobias Makuochukwu Onyia

Dear Tobias. Thank you for your kind answer.

Here we have an oxide-copper ore with Hematite Iron. The first issue for us is the slurry adhesion which is really important for us. Due to my background in the cathode copper industry, I experienced this problem in the filter press over and over time, which slurry stuck to the PP fiber pores. Furthermore, our second issue related to the flow rate of slurry meanwhile considering the grain sizes of slurry combinations. finally, the most important issue is about the proper flocculant that we need.

In fact, I need a technical answer related to my technical data given in the question text.

Again thank you for your warm answer.

Dave G Osborne

Hello Hamid

We have look at various dewatering options but with the added priority that the cake must be handleable to enable conventional handling methods to be used with minimal need for mods to equipment so as to be as cost effectve as possible. For mineral tailings waste we have found that the Somerset system is very adaptive to impact of clays etc., and is a continuous operation. Screw press cakes are often highly flocculated and remain high in moisture so they need to be disposed of at or very close to the disposal site where they are generated. So the press must ideally be located within the disposal area itself and equipment needs to be adapted for this duty.

I'd be happy to explain in more detail if there is interest.

Regards

Dave

Hamid Javaheri

Dave G Osborne

Dear Dave,

I hope you are doing well.

Thank you for your kind response. I am delighted to learn more about the Somerset system. Also, I would like to share additional information with you.

In my previous role as the technical manager of a cathode copper company in Iran, I was the commissioning manager and optimizer of the processing of the cathode copper plant. During this time, I observed that all companies utilized the filter press for dewatering the slurry in the Leaching unit. However, I found that this method was manual and operated at a low speed.

Given the high value of the PLS solvent obtained from leaching dewatering, companies require a more efficient and effective method to achieve a drier cake.

1. I have explored alternative methods, such as the centrifuge peeler, but found it to be a batch process rather than continuous.

2. Additionally, the maintenance and manufacturing costs associated with the centrifuge decanter seem prohibitively expensive. Furthermore, the quality of dewatering achieved with this method seems subpar. The equipment must be from stainless steel 316 due to acid sulfuric inside PLS, and the normal rotational speed of the drum at 3000rpm leads to rapid and hazardous corrosion.

3. While the vacuum drum filter appears to be a viable option, it is also quite expensive as it requires vacuum pumps, separators, and a mechanism agitator.

4. Similarly, the vacuum belt filter is a costly solution.

Considering these challenges, I have been contemplating the use of a screw press. This method offers the advantages of being small in size, continuous, and cost-effective. It appears to be too simplistic in terms of maintenance and manufacturing requirements.

I look forward to discussing this matter further and exploring potential solutions with you.

\Best regards,

\Hamid

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