hongdamach.com

A pulverizer is a machine that uses mechanical force to break large pieces of material into smaller particles or powder. You choose the right type by matching its working principle to your target particle size, your material's hardness and moisture, and your required throughput — because, as the supplier Jiangsu Hongda Powder Equipment notes, capacity and particle-size range vary with the material, so the equipment has to be matched to the specific feed rather than picked from a catalog alone.

The core job: reduce particle size

Every pulverizer does the same basic thing — applies force to a solid and breaks it down. What differs is how that force is applied, and that determines how fine you can go and which materials will cooperate.

The main force types:

• Impact — hammers or blades strike material at speed. Fast, good for brittle and medium-hard feeds.
• Shear and cutting — blades slice material. Suited to softer, fibrous, or heat-sensitive feeds.
• Attrition/grinding — material is rubbed between surfaces. Used for fine and ultrafine work.
• Airflow collision — particles collide with each other in a high-speed gas stream. Used for ultrafine, contamination-sensitive products.

Main machine categories

Suppliers group pulverizers by fineness stage and principle. The list below reflects the categories a full-line powder equipment maker typically offers, from coarse down to ultrafine.

A few practical notes on this map:

• "Universal" doesn't mean universal. A B-series or GF machine handles a wide range, but its achievable fineness still depends on the feed.
• Dust control is a design feature, not an add-on. Many series come in "吸尘" (dust-absorbing) and "旋风脉冲吸尘" (cyclone-pulse dust-collecting) versions, and some are built as complete units with the collector integrated. If your material is fine, hazardous, or valuable as dust, this matters.
• Ultrafine usually means a different principle. You generally can't reach jet-mill fineness by running a hammer mill harder; you switch to airflow or vibration milling.

How principle drives the choice

The single most useful selection rule: the working principle sets the floor on particle size, and the material sets whether that principle works at all.

• Hard, brittle material → impact or jet milling works well.
• Soft, fibrous, or sticky material → cutting or shear is more forgiving; impact mills can clog or smear.
• Heat-sensitive material → choose a principle that generates less heat, or a design with cooling/airflow.
• Very fine target → plan for jet or vibration milling, and expect lower throughput per unit of power.

Industries that use pulverizers

The equipment line above is built for pharmaceutical, food, and chemical processing. In practice:

• Pharma — fine and ultrafine grinding, often with strict dust containment and easy-clean designs.
• Food — grinding, plus fruit/vegetable reduction and colloid milling for pastes.
• Chemical — general size reduction where material hardness and moisture vary widely.

Questions to ask before you buy

Because capacity and fineness depend on the material, the fastest way to a correct machine is to answer these before contacting a supplier:

1. Target fineness — what particle size or mesh do you need out the other end?
2. Throughput — how many kg or tons per hour?
3. Material properties — hardness, moisture content, oiliness, stickiness, heat sensitivity, fiber content.
4. Dust control — is the material hazardous, or is the dust valuable? Do you need an integrated collection unit?
5. Upstream and downstream — what size is the feed coming in, and does the output feed a sieve, mixer, or granulator next?
6. Hygiene and standards — do you need food- or pharma-grade construction and cleanability?

A supplier that offers the full chain — crushing, sieving, conveying, mixing, granulating, drying — can match the pulverizer to the rest of your line instead of selling it in isolation. That integration is often the difference between a machine that works and one that bottlenecks the process.

A conveyor (输送机) in a powder processing line is the equipment that moves material continuously between process steps—typically from a pulverizer (粉碎机) to a sifter (筛粉机), from a sifter to a mixer (混合机), or from a granulator (制粒机) to a dryer (干燥机). The right type depends mainly on your material form (powder, granule, fragile, dusty), the conveying distance and lift height, and how well it interfaces with the upstream and downstream machines. For most powder lines, the three common choices are belt conveyors, screw conveyors, and vacuum loaders, each suited to different conditions rather than being interchangeable.

The Role of a Conveyor in a Powder Line

In a typical powder processing flow—crushing → screening → mixing → granulating → drying—material must move between machines without contamination, spillage, or excessive dust. The conveyor is the link that makes this continuous. According to the manufacturer's product description, conveyors "借助输送带、链条等部件实现物料在工序或场地间的连续传输" (use belts, chains, and similar components to achieve continuous transfer of material between process steps or sites).

How you connect the conveyor to upstream and downstream equipment affects both throughput and housekeeping:

• Discharge point alignment: The conveyor outlet should feed directly into the next machine's inlet to avoid manual transfer and dust release.
• Height and layout: If the next machine sits higher, you need either a lift-capable conveyor or a vacuum loader rather than a flat belt.
• Sealing: For dusty or fine powders, enclosed conveying reduces airborne dust and material loss.

Common Conveyor Types and Where They Fit

The site lists three conveyor-related products: SSJ皮带输送机 (SSJ belt conveyor), LSJ螺杆输送机 (LSJ screw conveyor), and ZKS系列真空加料机 (ZKS series vacuum loader). These cover most powder-handling needs, but they behave very differently.

Belt Conveyor (SSJ皮带输送机)

Suited to moving bulk granules or larger particles horizontally or at a slight incline. It is a good fit when material is not highly dusty and does not need to be fully enclosed. Because it is relatively open, it is less ideal for fine, airborne powders.

Screw Conveyor (LSJ螺杆输送机)

A good choice for enclosed, short-distance transfer of powders and small granules, and for feeding material directly into a machine inlet. The enclosed tube helps contain dust. It works well when you need a controlled, steady feed rate rather than long-distance transport.

Vacuum Loader (ZKS系列真空加料机)

Best when you need to lift material vertically or move fine, dusty powders point-to-point with minimal dust escape. Because it is a closed pneumatic system, it suits feeding mixers, sifters, and similar equipment where cleanliness and dust control matter.

How to Choose: Match the Conveyor to Your Conditions

Work through these factors in order; the answer usually narrows to one type quickly.

1. Material form and fragility. Granules and lumps tolerate a belt conveyor; fine powders favor screw or vacuum. Fragile granules may break down in a screw conveyor, so a belt or gentle vacuum transfer is safer.
2. Dustiness. Highly dusty powders point to enclosed options—screw conveyor or vacuum loader.
3. Distance and direction. Long horizontal runs suit belts; short enclosed feeds suit screws; vertical lifts suit vacuum loaders.
4. Interface with the next machine. If the downstream machine (mixer, sifter, granulator) needs a steady, enclosed feed, a screw conveyor or vacuum loader integrates more cleanly.
5. Throughput and layout. The manufacturer notes that capacity and particle-size ranges vary with the material, and recommends contacting their engineers for a tailored configuration—so final sizing should be confirmed against your specific material and required output.

Common Problems and Where to Look

When to Ask the Manufacturer

Because capacity and particle-size range depend on the specific material, and because the site explicitly states that configurations are tailored ("根据物料的不同,产能和粒度范围也会有所不同。请联系我们的工程师,为您量身定制更适合您的设备"), the practical step before ordering is to provide your material type, bulk density, required throughput, transfer distance, and lift height. That information lets the supplier recommend among the SSJ belt, LSJ screw, and ZKS vacuum options—or a combination—rather than guessing from the product name alone.

A granulator (制粒机) converts powders or fine particles into granules with a defined shape and size. You choose the type based on your feed material, whether you can use moisture or a binder, your target granule size, and how the granulator fits with your mixing, drying, and screening steps. The five families below cover most pharmaceutical, food, and chemical powder-processing lines.

What Granulation Actually Does

Granulation solves problems that raw powders create: dust, poor flow, segregation of mixed ingredients, and low bulk density. By binding particles into larger, more uniform granules, you get a material that flows predictably, compresses or fills more evenly, and stays homogeneous during handling.

Two broad routes exist:

• Wet granulation — adds liquid (water, solvent, or binder solution), forms granules, then dries them.
• Dry granulation — uses mechanical force (compaction) with no liquid, suitable for moisture-sensitive or heat-sensitive materials.

The Main Granulator Types

The product range on hongdamach.com lists five granulator families. Each suits a different feed form and process stage.

Swing Granulator (YK Series)

Best when you already have a moist, cohesive mass and want a simple, low-cost way to form granules. The oscillating rotor forces the mass through a screen, so granule size is set mainly by the screen aperture. It is a good entry point for small batches, but throughput is limited and it is not ideal for free-flowing dry powders.

Dry Granulator (GK Series)

Choose this when your material cannot tolerate moisture or heat. The powder is compacted between rollers into a sheet or flake, which is then milled into granules. No drying is required, which shortens the line and avoids a thermal step. The trade-off is that granules tend to be denser and less spherical than wet-granulated ones.

High-Efficiency Wet Mixing Granulator (GHL Series)

This combines mixing and granulation in a single closed vessel using a high-shear impeller (often with a chopper). It produces dense, uniform granules and reduces material handling between steps. It suits formulations where a binder solution is added and a compact, well-bound granule is wanted. Because it is a closed process, it also helps with containment.

Rotary Granulator (ZL Series)

A rotating action forms granules from moist powder, and it can run more continuously than a swing granulator. It fits lines where you want steady output of wet granules before drying.

Quick Sizing Granulator (KZL Series)

This is a sizing and de-lumping machine rather than a primary granulator. It takes wet or dry cakes and breaks them into uniform granules. Use it after wet granulation or after drying to tighten the particle-size distribution.

How to Match the Type to Your Process

Work through these questions in order:

1. Can the material take moisture or heat? If no, start with the GK dry granulator. If yes, wet granulation (YK, GHL, ZL) is open to you.
2. Do you need mixing and granulation in one step? The GHL high-efficiency wet mixing granulator does both; a swing or rotary granulator expects a pre-mixed wet mass.
3. What granule size do you need? For wet routes, screen aperture or rotor configuration sets the size. For dry routes, the compaction and milling stages control it.
4. What throughput? Swing granulators suit smaller batches; rotary and high-shear units scale higher.
5. Where does it sit in the line? Granulation usually sits between mixing and drying, with screening after drying. A quick sizing granulator (KZL) often follows the dryer.

The site notes that capacity and particle-size range depend on the material, and that the manufacturer's engineers tailor the equipment to the application — so treat the table above as a starting filter, not a final spec.

Key Selection Criteria

• Capacity — match to your batch size and required output rate.
• Granule size range — driven by screen aperture (wet routes) or compaction/milling settings (dry routes).
• Binder or moisture needs — wet routes need a liquid addition and a downstream drying step; dry routes do not.
• Line integration — check how the granulator connects to your mixer upstream and dryer/screen downstream. A GHL unit collapses mixing and granulation into one vessel; a KZL unit is a finishing step.
• Material sensitivity — heat- and moisture-sensitive products point to dry granulation.

Common Operating Problems

• Uneven granules — usually a feed-consistency or screen/rotor issue. Check that the wet mass is uniform before granulation and that the screen is not worn or partially blocked.
• Caking — over-wetting or insufficient mixing before granulation. Reduce liquid addition or improve pre-mixing.
• Low yield / too many fines — screen aperture too large, rotor speed mismatched, or (in dry granulation) insufficient compaction force.
• Over-dense, hard granules — too much binder or excessive shear in a high-shear unit; adjust binder level or impeller settings.

Where to Go Next

If you are still defining the front end of your line, the related decisions are which mixer prepares the feed and which sifter classifies the finished granules. Granulation sits between them, so the granulator choice should follow from your mixing method and your target particle-size distribution, not the other way around. For material-specific capacity and granule-size data, the manufacturer's engineers provide tailored recommendations based on the actual product.

A mixer (混合机) is a machine that blends two or more powders or granules until each component is distributed evenly enough to meet your process specification. Choose the type by matching the mixing mechanism to your material's flow behavior, density, and fragility, then confirm batch volume, uniformity target, and whether you need heating, vacuum, or a specific discharge and cleaning arrangement. The product line from Jiangsu Hongda Powder Equipment (江苏宏达粉体装备有限公司) illustrates how many distinct mechanisms exist for the same job — high-speed, two-dimensional, three-dimensional, conical, ribbon, and double-paddle trough mixers — and the right pick depends on your powder, not on a single "best" machine.

What a Mixer Actually Does

The company describes its mixer category as equipment that "将多种物料均匀混合，使各组分分布一致以满足工艺要求" — it combines multiple materials uniformly so each component is distributed consistently to meet process requirements. That definition hides the real engineering question: different mechanisms achieve uniformity in different ways, and each has a practical limit.

• Convective mixing moves large groups of particles with blades, ribbons, or paddles.
• Diffusive mixing lets particles roll and slide past each other, as in a rotating drum or cone.
• Shear mixing breaks up agglomerates and forces particles through each other at high speed.

Most machines combine two of these. A ribbon mixer is mostly convective; a double-cone or V-shaped tumbler is mostly diffusive; a high-speed mixer adds intense shear. Your material decides which combination works.

Mixer Types in the Hongda Lineup

The site lists these mixer models. Each name signals its mechanism and typical use.

The site does not publish capacity, speed, or uniformity figures for these models. Those are confirmed per project: "根据物料的不同,产能和粒度范围也会有所不同。请联系我们的工程师,为您量身定制更适合您的设备。" In other words, treat the table as a map of mechanisms, not a spec sheet.

How to Choose: The Decision Factors

Work through these in order. The first two usually eliminate most options.

1. Material characteristics

• Flowability. Free-flowing powders blend easily in tumbling or ribbon mixers. Cohesive or sticky powders need forced-action or high-shear designs (CH-VI, GSH).
• Density difference. If components differ widely in bulk density, diffusive mixers tend to segregate; convective or shear mixers hold the blend better.
• Fragility. If granules must not break, avoid high-speed and ribbon designs; two-dimensional (EYH) or three-dimensional (SWH) motion is gentler.
• Agglomerates. If the feed contains lumps, a high-speed or forced-action mixer can break them during blending.

2. Uniformity requirement

A "good enough" blend for one product may fail another. State your target as a coefficient of variation or a sampling tolerance, and tell the supplier. High-speed and forced-action mixers generally reach tighter uniformity faster; gentle tumbling mixers may need longer cycles.

3. Batch size and throughput

Match the working volume to your batch, not the total volume. Overfilling a tumbler or ribbon mixer reduces mixing action; underfilling wastes cycle time. Because the site gives no capacity figures, this is a direct question for the supplier.

4. Process conditions

• Heating or drying during mixing — not every mixer supports it; check before assuming.
• Vacuum or inert atmosphere — relevant for solvents or oxidation-sensitive powders.
• Cleaning and changeover — if you run many products, discharge completeness and cleanability matter as much as blend quality. Conical and trough designs with full-opening discharge are easier to clean than internal-rotor machines.

5. Upstream and downstream fit

A mixer rarely stands alone. In a typical powder line it sits after the pulverizer (粉碎机) and sifter (筛粉机), and before the granulator (制粒机) or dryer (干燥机). Feed particle size from the sifter affects how fast the mixer reaches uniformity, and the mixer's discharge must match the granulator's or dryer's inlet. If you plan a wet granulation line, a high-speed mixer-granulator (like the GHL series listed under 制粒机) may replace a separate mixer and granulator.

Questions to Ask the Supplier

Before quoting, confirm:

1. Working volume for your batch, and fill ratio range.
2. Rotor or drum speed, and whether it is variable.
3. Contact material (e.g., 304 vs 316 stainless) and surface finish.
4. Seals — type and suitability for your powder (fine dust, abrasive, or corrosive).
5. Discharge design — how completely the batch empties, and how the machine is cleaned between products.
6. Uniformity data — ask for a tested mixing-time curve for a material similar to yours, not a generic claim.
7. Options — heating jacket, vacuum port, spray nozzle for liquid addition, if your process needs them.

A Practical Example

Suppose you blend a pharmaceutical powder where one component is a fragile granule and another is a fine, dense API. A ribbon mixer would shear the granules; a high-speed mixer would break them further. A two-dimensional (EYH) or three-dimensional (SWH) motion mixer keeps shear low, but if the density gap is large, you may see segregation on discharge. The realistic answer is often a gentle convective design with a controlled discharge that minimizes free-fall, plus a uniformity test on your actual material before you commit to a model. That test — not the catalog name — is what tells you whether the machine works.

Bottom Line

Pick the mixer by mechanism first: gentle tumbling for fragile or free-flowing blends, convective ribbon or paddle for general powders, high-speed or forced-action for cohesive materials and tight uniformity. Then confirm volume, speed, material of construction, seals, and cleaning against your actual batch. Because Hongda builds to order and states that capacity and particle range vary by material, the productive next step is to send your material data and batch size to their engineers and ask for a model recommendation plus a uniformity test plan.

A sifter (筛粉机) is a machine that uses a screen mesh to separate powder into uniform particle-size grades. You choose the right type by matching three things: your material's behavior (fineness, moisture, flowability), the mesh size and capacity you need, and your industry's hygiene requirements. For pharmaceutical, food, and chemical production, the four common configurations are oscillating sifters, high-efficiency vibrating sifters, centrifugal sifters, and rectangular vibrating screens — each fits a different combination of material and throughput.

What a sifter actually does

The core function is size classification: feed powder onto a screen, let particles below the mesh aperture pass through, and retain oversized particles. This gives you a consistent, uniform powder grade rather than a mixed batch.

Screening is a mechanical separation step — it does not change the material, only sorts it. That makes it different from a crusher (which reduces particle size) and a mixer (which blends components). In a full powder line, the sifter usually sits after crushing or milling and before mixing, packaging, or tableting, so downstream equipment receives only the particle range it was designed for.

The main screening machine types and what each suits

The product range on hongdamach.com lists four sifter families. Here is how they differ in principle and typical fit:

The choice is not about which is "best" — it is about which motion handles your material. Free-flowing, coarse granules screen easily on an oscillating unit. Fine or clingy powders often need the centrifugal action to force particles through the mesh instead of letting them sit on top.

Key selection factors

Work through these before specifying a machine:

• Material properties. Fineness, moisture content, and flowability decide whether gravity screening works or whether you need centrifugal force. Damp or sticky powder blinds a static mesh quickly.
• Required mesh size. The aperture sets your cut point — what passes and what is retained. Finer mesh means lower throughput per unit area.
• Capacity. Match throughput to your line rate, not to a peak you will never run. Undersizing causes bottlenecks; oversizing wastes floor space and energy.
• Hygiene and industry standard. Pharmaceutical and food applications demand cleanable contact surfaces and construction that meets the relevant standard. The manufacturer states ISO 9001 (2015) and EU CE certification and membership in a pharmaceutical equipment association, which is relevant if you operate in a regulated sector.
• Integration. Confirm the sifter's inlet and outlet match your crusher, mixer, and conveyor connections so it drops into the line without custom adapters.

Because capacity and particle-size range vary with the material, the manufacturer advises contacting their engineers for a tailored specification rather than selecting from a generic table alone.

Common operating problems and fixes

• Screen blinding (mesh clogged, throughput drops): usually caused by moisture or electrostatic cling. Dry the feed, reduce loading rate, or switch to a centrifugal sifter that actively pushes material through.
• Low throughput: often an oversized feed, a mesh too fine for the material, or overloading. Check feed rate against the machine's rated range first.
• Mesh wear or tears: abrasive powders wear screens faster. Inspect and replace mesh on a schedule rather than waiting for contamination to appear in output.
• Inconsistent grading: verify the screen is tensioned correctly and not sagging, and that vibration or rotation is running at the specified setting.

Where it fits in a powder processing line

A typical sequence runs: crusher → sifter → mixer → granulator → dryer → conveyor. The sifter's job in that chain is to guarantee that only the correct particle range reaches mixing or tableting. If you skip it, oversized particles carry through and cause uneven blends, poor tablet uniformity, or rejected batches. Pairing it correctly with the upstream crusher (so feed size is within the sifter's range) and the downstream conveyor (so discharge is handled continuously) is what keeps the line stable.

Making the decision

Start with your material: is it free-flowing or clingy, coarse or fine, dry or damp? That single answer narrows you to oscillating versus centrifugal. Then set mesh size and required throughput, and confirm hygiene certification matches your industry. If your material is unusual or your capacity target is specific, request a tailored recommendation — the general catalog describes machine families, but the right model depends on your actual powder.