{"id":12495,"date":"2026-09-11T08:00:00","date_gmt":"2026-09-11T05:00:00","guid":{"rendered":"https:\/\/kopar.fi\/?p=12495"},"modified":"2026-08-28T10:34:40","modified_gmt":"2026-08-28T07:34:40","slug":"how-to-choose-a-pneumatic-transport-or-a-pneumatic-conveyor-for-the-metallurgical-polyn-transfer","status":"publish","type":"article","link":"https:\/\/kopar.fi\/en\/miten-valita-tulppakuljetus-tai-leijukuljetus-metallurgisen-polyn-siirtoon\/","title":{"rendered":"How to choose between plug conveyance or dense-phase conveying for the transfer of metallurgical dust?"},"content":{"rendered":"<p>The design of pneumatic dust removal in a metallurgical environment begins with one important question: which transport method is better suited: a pneumatic or a jet method? The choice is not just a technical detail; it directly affects the reliability of the process, energy consumption, and maintenance costs. <a href=\"https:\/\/kopar.fi\/en\/pneumatic-conveying\/\">Explore pneumatic conveying solutions<\/a> and read how to make the right choice systematically.<\/p>\n<p>In this guide, we go through four steps that will help you assess which method is best suited to your melting process. Each step builds on the previous one, so you should go through them in order.<\/p>\n<h2>Identify the material's properties before choosing the transport method<\/h2>\n<p>The material properties largely determine which transport method is technically feasible. Metallurgical dust is not a homogeneous material; its properties vary significantly depending on the process and the source material. The wrong transport method can lead to pipe blockage, excessive wear, or material degradation during transport.<\/p>\n<p>First assess the following material properties:<\/p>\n<ul>\n<li><strong>Size and distribution of the population:<\/strong> Fine-grained, uniformly small-grained dusts are often suitable for pneumatic transport, whereas materials with a wider particle size may require higher air speeds for sieving transport.<\/li>\n<li><strong>Density:<\/strong> Heavy materials, such as copper slag dust or boiler dust, typically perform better in a hopper transport where the load ratio of the solid materials is high.<\/li>\n<li><strong>Consumer price:<\/strong> Extremely consuming materials benefit from the lower material speed of the hose transport, which significantly reduces the wear of the piping and equipment.<\/li>\n<li><strong>Moisture content and hygroscopicity:<\/strong> Materials that absorb moisture can condense in the piping during a heavy-duty transport operation where more air is used.<\/li>\n<li><strong>Temperature:<\/strong> In the metallurgical process, the dust can be very hot. Check how the temperature affects the material's flow properties.<\/li>\n<\/ul>\n<p>Once you have written down these characteristics, you have a clear starting point for the next step. If the material is consumer-grade, heavy, and fine-grained, plunger transport is often a strong candidate at this stage.<\/p>\n<h2>Assess process conditions and relocation trips<\/h2>\n<p>After mapping the material's properties, it is time to examine the process's boundary conditions. In the melting process, the conveying system does not operate in a vacuum; it is part of a larger whole whose requirements limit and guide the design.<\/p>\n<p>Go through the following process factors:<\/p>\n<ol>\n<li><strong>Relocation journey:<\/strong> Pipeline transport typically works well over 10\u2013300 meter pipelines. Aerial transport is suitable for shorter distances where a higher air speed does not significantly wear out the pipeline.<\/li>\n<li><strong>Capacity requirement:<\/strong> Estimate the required transfer capacity in tons per hour. In the case of tuber transport, the capacity is typically 0\u201370 t\/h, depending on the material and the pipe design.<\/li>\n<li><strong>Pipeline route:<\/strong> Is there a lot of directional changes, elevation changes, or cramped spaces on the route? Both methods work in a closed pipeline, but complex routes increase pressure losses especially in the case of bulk transport, where the air speed is higher.<\/li>\n<li><strong>Continuity requirement of the process:<\/strong> Does the transfer operate in a periodic manner, or is a continuous material flow required? Trunk transport typically operates in cycles, whereas bulk transport can also be carried out in a continuous flow.<\/li>\n<\/ol>\n<p>Once the process conditions have been evaluated, you can proceed to compare the methods technically. At this point, you should have at least an estimate of the transfer journey, the capacity requirement, and the temperature of the material.<\/p>\n<h2>Compare the technical differences between tuber transport and tuber handling<\/h2>\n<p>Now that you know what material is being transported and under what conditions, it\u2019s time to compare the methods side by side. Slurry transport (dense phase conveying) and liquid transport (dilute phase conveying) differ from each other primarily in terms of air speed, pressure, and material behavior.<\/p>\n<h3>Technical characteristics of the tulip transport<\/h3>\n<p>In the pipe transport, the material moves slowly through the pipeline in a tight tube or fragmented pieces. The air speed is low, typically 7\u201310 m\/s, and the operating pressure can be 1\u20137 bar. This means that the material does not undergo high mechanical stress during transportation.<\/p>\n<ul>\n<li>Suitable for consumer-grade and fine-grained materials<\/li>\n<li>Reduces wear on piping and valves<\/li>\n<li>Consumes less compressed air than aerial transport<\/li>\n<li>Works in cycles according to the pressure vessel filling and emptying phase<\/li>\n<\/ul>\n<h3>Technical characteristics of the crane transport<\/h3>\n<p>In the bulk material handling application, the material flows in the pipeline with the air flow at a higher speed. This simplifies the equipment and is suitable for situations where the material is light and easy to flow, and wear and tear is not a significant problem.<\/p>\n<ul>\n<li>Simpler equipment and lower investment costs<\/li>\n<li>Suitable for lighter, less consuming materials<\/li>\n<li>Higher air flow increases operating costs<\/li>\n<li>High air speed can wear out the piping and break delicate materials<\/li>\n<\/ul>\n<p>In a metallurgical dust transfer application, such as the handling of boiler dust or charge dust, plunger transport is often the better choice thanks to its low material speed and lower air consumption. However, plunger transport can perform better if the transfer distance is short and the material is light and uniform.<\/p>\n<p>Good practical advice: if you are unsure which one is better, it is advisable to test the material under real-life conditions before making a final decision. <a href=\"https:\/\/kopar.fi\/en\/contact\/\">Contact us<\/a> and tell us about your process and the edge conditions, so we can help you assess the most suitable solution.<\/p>\n<h2>Check the selection using reliability and maintenance factors<\/h2>\n<p>Technical suitability alone is not sufficient to justify a choice. In a metallurgical environment, operational reliability is often a more critical factor than initial investment. Unexpected downtime in smelters and steel mills can cause significant production losses, so the reliability of the transport system must be carefully evaluated.<\/p>\n<p>Check your choices with the following questions:<\/p>\n<ol>\n<li><strong>How often does the system require maintenance?<\/strong> In the case of tuber transport, the lower material speed means slower wear in the pipes and valves. This extends the intervals between maintenance and reduces the need for spare parts.<\/li>\n<li><strong>Is it easy to inspect and clean the piping system?<\/strong> A closed system is an important requirement in metallurgical dust handling. Ensure that the pipeline cleaning and inspection points are designed with the requirements of the process in mind.<\/li>\n<li><strong>How does the system behave if the material flow changes?<\/strong> Process conditions can vary during production. The plug transport is flexible and can be adjusted via the control system without any mechanical changes.<\/li>\n<li><strong>Is the system integrable with the plant's control system?<\/strong> Fully automated transport that integrates with the DCS system reduces the operator's workload and improves process management.<\/li>\n<\/ol>\n<p>Once you have gone through all four stages, you have a clear picture of which method is suitable for your process. In most metallurgical dust transfer applications, bag transport proves to be a better option due to its energy efficiency, low wear and tear, and high operational reliability. However, bag transport remains a viable option in certain specific cases.<\/p>\n<p>Kopar has supplied pneumatic conveying systems to over 25 smelters worldwide, and our experience covers a wide range of metallurgical materials and process conditions. <a href=\"https:\/\/kopar.fi\/en\/references\/\">View our case studies<\/a> And see what solutions we have implemented for similar challenges. If you want to deepen your understanding of pneumatic transport, read more about the topic: <a href=\"https:\/\/kopar.fi\/en\/mika-is-the-best-pneumatic-conveyor-for-finely-ground-materials\/\">what is the best pneumatic conveyor for fine materials<\/a>. You can also <a href=\"https:\/\/kopar.fi\/en\/pneumatic-conveying\/\">Explore our pneumatic conveying solutions<\/a> more precisely or <a href=\"https:\/\/kopar.fi\/en\/contact\/\">contacting<\/a> to our experts, who help find a solution that suits your process exactly.<\/p>","protected":false},"excerpt":{"rendered":"<p>Dense phase conveying or dilute phase conveying for metallurgical dust? Four steps to the right choice.<\/p>","protected":false},"featured_media":5163,"menu_order":0,"template":"","class_list":["post-12495","article","type-article","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/kopar.fi\/en\/wp-json\/wp\/v2\/article\/12495","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kopar.fi\/en\/wp-json\/wp\/v2\/article"}],"about":[{"href":"https:\/\/kopar.fi\/en\/wp-json\/wp\/v2\/types\/article"}],"version-history":[{"count":1,"href":"https:\/\/kopar.fi\/en\/wp-json\/wp\/v2\/article\/12495\/revisions"}],"predecessor-version":[{"id":12503,"href":"https:\/\/kopar.fi\/en\/wp-json\/wp\/v2\/article\/12495\/revisions\/12503"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kopar.fi\/en\/wp-json\/wp\/v2\/media\/5163"}],"wp:attachment":[{"href":"https:\/\/kopar.fi\/en\/wp-json\/wp\/v2\/media?parent=12495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}