{"id":15542,"date":"2026-07-20T12:38:42","date_gmt":"2026-07-20T04:38:42","guid":{"rendered":"https:\/\/www.sinothermo.com\/?p=15542"},"modified":"2026-07-20T14:01:53","modified_gmt":"2026-07-20T06:01:53","slug":"granulation-process-powder-to-granule","status":"publish","type":"post","link":"https:\/\/www.sinothermo.com\/ru\/insights\/granulation-process-powder-to-granule\/","title":{"rendered":"The Granulation Process in Action: From White Sugar to Dried Granules"},"content":{"rendered":"
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We recently ran a single, integrated material trial in the SINOTHERMO testing lab that shows the entire granulation process<\/strong> end to end \u2014 starting from ordinary white sugar and finishing with dried, uniform granules verified by moisture analysis. It is a simple material to follow, but it demonstrates exactly what a powder-to-granule line has to accomplish for far more demanding products: control particle size, build uniform granules, drive out moisture, and prove the result with instrument data.<\/p>\n

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This article walks through that trial one stage at a time \u2014 why each step exists, what the equipment does, and how the pieces connect into one repeatable line. If you are evaluating a granulation or drying line for food, pharmaceutical, chemical or fine-powder production, this is the process you are really buying, seen on real material rather than a spec sheet.<\/p>\n

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Why the granulation process follows this order<\/h2>\n

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Fine powder is difficult to handle. It flows poorly, generates dust, segregates during transfer, doses inconsistently, and can cake or dissolve unevenly. The granulation process<\/strong> solves this by converting loose powder into larger, uniform, free-flowing granules \u2014 but the sequence of steps matters as much as the steps themselves.<\/p>\n

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The logic of the chain is straightforward:<\/p>\n

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  1. Pulverize first<\/strong> to create a consistent fine powder \u2014 a uniform feedstock is what makes even granulation possible.<\/li>\n

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  2. Granulate<\/strong> to convert that fine, dusty powder into uniform, free-flowing granules with better flow, dosing and dissolution, and far less dust.<\/li>\n

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  3. Dry<\/strong> to remove the moisture introduced during granulation, so the granules are stable, storable and ready for packaging without caking.<\/li>\n

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  4. Verify<\/strong> the final moisture with an instrument, so the result is proven rather than assumed.<\/li>\n

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    Size reduction \u2192 granulation \u2192 drying \u2192 QC. Skip or reorder a step and the problem reappears downstream as uneven granules, high moisture, or a batch that fails at packaging. Here is how each stage played out in the trial.<\/p>\n

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    Stage 1 \u2014 Pulverizing: building a uniform feedstock<\/h2>\n

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    \"impact<\/figure>\n

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    The trial begins with raw granulated white sugar fed into a WFJ Impact Pulverizer<\/em><\/strong><\/a>. Coarse crystals up to 10 mm enter the chamber, where high-speed impact grinding fractures them and the particles are classified to a controlled fineness. The output is a fine, even powder in the 80\u2013450 mesh<\/strong> range \u2014 capable of 400 mesh or finer \u2014 and the mill runs cleanly with cyclone or bag-type dust collection.<\/p>\n

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    This step is about consistency, not just fineness. Particle size reduction<\/strong> to a uniform distribution is what allows the next stage to build granules of even size and density. Feed inconsistent powder into a granulator and you get inconsistent granules; a controlled feedstock is the foundation of the whole line.<\/p>\n

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    Stage 2 \u2014 Granulation: from fine powder to uniform granules<\/h2>\n

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    \"Rotary<\/figure>\n

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    The fine powder then moves to a ZLB rotary granulator <\/a><\/i><\/b>(also called a basket granulator). Inside, a rotating impeller presses the material against a precision cylindrical screen \u2014 the “basket” \u2014 and extrudes it through the perforations into consistently sized, dense, cylindrical granules. This is the heart of the sugar granulation<\/strong> step: it turns a fine, dusty powder into free-flowing granules that handle, dose, dissolve and package far more predictably.<\/p>\n

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    At this point the granules are still high in moisture \u2014 they are wet granules<\/em>, which is exactly why a drying stage has to follow. Note that “rotary granulator” and “basket granulator” describe the same rotary-impeller-plus-basket-screen machine; it should not be confused with an oscillating granulator, which is a different design.<\/p>\n

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    Equipment note: exact screen aperture and throughput for the ZLB unit are configured to the target granule size<\/em>.<\/p>\n

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    Stage 3 \u2014 Fluidized bed drying: locking in stability<\/h2>\n

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    \"FG<\/figure>\n

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    The wet granules are dried in an FG Vertical Fluidized Bed Dryer<\/a>.<\/em><\/strong> Hot air \u2014 with an inlet temperature under 100 \u00b0C \u2014 suspends and fluidizes the granules, creating intimate particle-to-air contact so drying is fast and uniform. The dryer accepts material with moisture under 20% and, by its nominal specification, brings it down to a 3\u20135% moisture content<\/strong>.<\/p>\n

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    Fluidized bed drying<\/strong> is the right tool here for two reasons: fluidization dries every granule evenly rather than crusting the outside, and the vertical design maximizes bed height and floor-space efficiency in batch operation (the same platform can even be converted to a spray fluidized bed granulator). This is the step that makes the granules stable and storable \u2014 dried enough to resist caking and spoilage, ready for packaging.<\/p>\n

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    Stage 4 \u2014 Quality verification: proving the result<\/h2>\n

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    \"moisture<\/figure>\n

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    The trial closes with quality control on a Halogen Rapid Moisture Analyzer<\/em><\/strong><\/a>. A sample is weighed and rapidly heated by halogen; the analyzer computes the moisture loss and reports the final figure.<\/p>\n

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    In this run, the dried granules measured 0.19% final moisture<\/strong> \u2014 thoroughly dried. It is worth being precise about what that number means: the dryer’s nominal output spec is 3\u20135%, so 0.19% is the result of this particular run<\/em>, not a fixed guarantee. It demonstrates strong drying capability and, just as importantly, shows the value of verifying with an instrument rather than relying on feel. You do not know a batch has hit target until you measure it.<\/p>\n

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    One integrated line, one continuous logic<\/h2>\n

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    Read as a whole, the trial is a compact demonstration of what a well-designed granulation process<\/strong> delivers:<\/p>\n

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    \n\n\n\n\n\n\n\n\n
    Stage<\/th>\nEquipment<\/th>\nInput<\/th>\nOutput<\/th>\n<\/tr>\n<\/thead>\n
    1 \u00b7 Pulverize<\/td>\nWFJ Impact Pulverizer<\/td>\nWhite sugar, \u226410 mm<\/td>\nFine powder, 80\u2013450 mesh<\/td>\n<\/tr>\n
    2 \u00b7 Granulate<\/td>\nZLB Rotary (Basket) Granulator<\/td>\nFine sugar powder<\/td>\nUniform wet granules<\/td>\n<\/tr>\n
    3 \u00b7 Dry<\/td>\nFG Vertical Fluidized Bed Dryer<\/td>\nWet granules, <20% moisture<\/td>\nDried granules, 3\u20135% (spec)<\/td>\n<\/tr>\n
    4 \u00b7 Verify<\/td>\nHalogen Moisture Analyzer<\/td>\nDried granule sample<\/td>\n0.19% moisture (this run)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

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    Each stage hands a defined output to the next: uniform powder enables uniform granules; uniform granules dry evenly; even drying delivers a stable product; the analyzer proves it. That hand-off discipline \u2014 not any single machine \u2014 is what separates a reliable line from one that fights you at scale.<\/p>\n

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    Why this matters beyond sugar<\/h2>\n

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    Sugar is an easy material to watch, but the same powder \u2192 granule \u2192 dry \u2192 verify<\/strong> chain applies directly to:<\/p>\n

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