To collect dust generated in the ceramic industry, the configuration must be defined according to the individual production phase. Clays, quartz, feldspars, pigments, glazes, gypsum, fired fragments and ceramic slip have different characteristics and cannot be managed with a single generic vacuum cleaner. For localised finishing, a single-phase model for fine dust may be sufficient; grinding machines and continuous lines normally require three-phase industrial vacuum cleaners with automatic cleaning. Clouds produced during dosing, transfer and glazing must instead be intercepted using high-airflow dust collectors. Filtration, collection and containment also depend on the possible presence of respirable crystalline silica.
Industrial extraction in the ceramic sector
Ceramic production includes a sequence of very different processes. Along the process lines, materials with different consistencies and aerodynamic behaviours are handled and processed:
- ✓ Clay, quartz and silica-sand dust
- ✓ Feldspars, alumina, pigments and oxides
- ✓ Dry glaze dust and gypsum residues
- ✓ Granules, dry bodies and ceramic fragments
- ✓ Grinding dust and refractory materials
- ✓ Ceramic slip, sludge and damp washing residues
The nature of the waste changes significantly along the process. Lightweight and volatile dust generated during pigment weighing requires a different technology from the heavy, abrasive fragments produced by grinding a fired tile. Likewise, liquid ceramic slip cannot be collected with the same configuration used for completely dry silica.
Ceramic dust and crystalline silica are not synonyms
Not all ceramic dust consists exclusively of silica, and not all processes produce the same quantity of respirable fraction. Silica is naturally present in many rocks, sands and clays. When materials containing it are cut, ground, milled or finished, part of the dust may become fine enough to penetrate deep into the respiratory system, taking the name respirable crystalline silica.
Activities for which technical control guidance specifically highlights this risk include the preparation of glazes and colours, casting, dry finishing of greenware, kiln loading and unloading and automatic glaze application.
The industrial vacuum cleaner is a fundamental component of the containment system, but it must be integrated with correctly designed capture at source, process segregation and company operating procedures.
Why a generic vacuum cleaner may not be sufficient
Ceramic dust can be extremely fine, abrasive, adhesive or easily dispersed in the working environment. A system without a suitable configuration quickly shows operational limitations:
Recurring technical problems when a targeted focus is missing:
- Rapid filter clogging with immediate collapse of airflow;
- Uncontrolled dispersion of extremely fine dust during discharge and emptying phases;
- Critical risk of cross-contamination between different pigments and colour formulations;
- Premature wear of flexible hoses, bends and inlets caused by abrasive fired fragments;
- Irreversible cartridge damage if ceramic slip or wet residues reach the filters;
- Frequent production-shift interruptions for manual maintenance work.
An effective system depends on the perfect balance between vacuum pressure to lift solids, airflow to intercept clouds, filter surface area, anti-clogging countermeasures and collection stability.
How to configure the correct extraction system in ceramics
The choice of the ideal machine must be based strictly on the exact point in the process and on the consistency of the residue. This is the technical approach developed by FEVI:
1. Distinction of the process point: deposited dust vs airborne particulate
Dust deposited on the floor or on press bases requires a high-vacuum industrial vacuum cleaner to overcome the bulk density of the granules and transport them along the ducts. The volatile clouds produced during Big Bag opening, pigment dosing or mixer loading instead require a dust collector. This system moves very high air volumes, with high airflow, at hoods, glazing booths or articulated arms, capturing suspended particulate before it disperses into the department air.
2. Focus on filter surface area and anti-caking PTFE membranes
Clays and dry glazes are extremely fine dusts that penetrate the pores of traditional filters. The use of large filter surface areas distributed across cartridges coated with smooth PTFE surface membranes prevents particles from sealing the filter. The membrane supports complete detachment of compact material during regeneration cycles, reducing adhesion even in the presence of slight moisture or thermal condensation.
3. Continuous automatic cleaning systems and absolute HEPA stages
For continuous lines and grinding machines, automatic systems, such as ICLEAN technology, regenerate the filters alternately without interrupting the extraction flow. In process dust collectors, AIRCLEAN compressed-air technology is used instead. If the risk assessment highlights the presence of respirable crystalline silica and the air is returned to the department, integrating a final stage with an absolute HEPA H14 filter helps provide a high level of containment.
4. Prevention of colour contamination and safe Longopac collection
In pigment-weighing areas, residues from a previous mixture can alter the shades of subsequent tiles. To avoid contamination, dedicated vacuum cleaners, separate drums for individual colours or Longopac continuous-bag technology are used. This system collects particulate in a tubular bag that can be progressively sealed, avoiding drum opening and reducing direct operator exposure.
Comparison table for the ceramic industry
| Application requirement | Recommended solution | Why it matters |
|---|---|---|
| Localised finishing | Single-phase industrial vacuum cleaner for fine dust | Offers mobility and direct connection to the tool |
| Pigments and colour changes | Longopac collection and dedicated accessories | Reduces handling and contamination |
| Continuous grinding | Three-phase industrial vacuum cleaner with automatic cleaning | Keeps extraction more stable during the shift |
| Dust on hoppers and dosing units | Dust collector connected to a hood | Intercepts the cloud before dispersion |
| Dust with possible respirable silica | Filtration defined according to the risk assessment | Improves containment of fine particles |
| Abrasive fired fragments | Filter protection and reinforced hoses | Limits component wear |
| Ceramic slip and damp residues | Wet-and-dry industrial vacuum cleaner for solids and liquids | Avoids contaminating filters for dry dust |
| Large quantities of dust | Pre-separator and large-capacity collection | Reduces the load on the cartridges |
| Classified area | Verified ATEX configuration | Adapts the system to the substance and zone |
Managing flows and thermal or chemical risks in the department
A structured ceramic plant has deeply different operating areas, requiring targeted approaches:
- Pressing, forming and deburring greenware: Granules and fragments of fragile greenware accumulate around the presses. In addition to fixed capture, internal cleaning kits are required to reach the gaps. Dry finishing of greenware is classified as a critical phase for the possible presence of respirable silica.
- Post-firing grinding and polishing: Fired tiles produce extremely fine, hard and highly abrasive particulate on a continuous basis. Three-phase blowers are used, permanently connected to the grinding machine and equipped with special tangential inlets to separate heavy fragments and prevent cartridge wear.
- Ceramic slip and ceramic sludge: Tank emptying or washing generates dense, viscous fluids. These must never come into contact with vacuum cleaners for dry dust, but require Wet&Dry machines, WM or WT ranges, with internal deflectors and shut-off floats.
- Kiln unloading and refractory materials: Dust and supports leaving the kilns retain severe thermal conditions. They must not be collected with standard configurations before complete cooling, to avoid melting filters, seals and collection bags.
First recommended FEVI model: FEVI PULSE 11XA
For ceramic laboratories, localised precision finishing, mould cleaning, small benches and direct connection to compact construction tools, FEVI PULSE 11XA is the first fundamental technical reference model to assess in the department.
Powered at 230 V, this single-phase industrial vacuum cleaner features a 1,100 W by-pass motor delivering 250 mBar of vacuum pressure. It uses a large-surface primary cartridge, 10,000 cm², coated with a PTFE membrane and combined with a final absolute HEPA H14 filter. The integrated automatic cleaning system operates by continuous reverse airflow, keeping airflow stable. The machine is completed by a 50 mm tangential inlet, a practical 26 kg weight and the safe Longopac continuous-bag collection system.
Alternative configurations for higher requirements
The compact PULSE model meets localised requirements, but the production intensity of modern ceramics often requires a higher category:
- Greater capacity and power in single-phase operation: For internal press cleaning or higher quantities of clays and dry glazes at 230 V, the solution moves to FEVI 350 ICLEAN, with three motors, three HEPA + PTFE cartridges and a 50-litre drum.
- Continuous use on grinding and polishing machines: For prolonged industrial cycles over several shifts, FEVI TDC30 ICLEAN is used, equipped with a 3 kW three-phase blower and an increased 20,500 cm² filter surface area with alternate cartridge cleaning. For long distances and complex fixed centralised networks, the solution moves to the 5.5 kW power of FEVI HDC 355 ICLEAN.
- Large clouds of airborne dust: To intercept suspended dust on dosing units, mixers or glazing booths, industrial dust collectors are used. For a single source, FEVI DTX 1500 BASIC, with 1,500 m³/h airflow, is ideal. For presses and demanding cycles, FEVI DTX 2500 AIRCLEAN is installed, with a 4 kW fan, 80,000 cm² of filter media and pneumatic pulse cleaning.
- Mixing operations with ATEX risks: Pure clays and quartz are not combustible. However, if the process includes polymer binders, organic additives, combustible pigments or flammable decorations in classified areas, an ATEX-certified machine must be configured when required by the area classification and risk assessment, such as FEVI DTX 2500 AIRCLEAN ATEX or the pneumatic FEVI S PN ATEX range.
FAQ on extraction in the ceramic industry
Which vacuum cleaner is required to collect dust in the ceramic industry?
For small art workshops or intermittent finishing on greenware, a compact single-phase model for fine dust with automatic cleaning and HEPA filter is sufficient. For post-firing grinding lines or press cleaning, three-phase high-vacuum industrial vacuum cleaners are required. If the particulate is volatile and disperses into the air from dosing units or hoppers, a high-airflow dust collector combined with hoods or extraction arms must be installed.
Does ceramic dust always contain respirable crystalline silica?
No. The presence and exact percentage vary according to the raw materials, such as clays, quartz and feldspars, and the formulas used. When these mineral compounds are ground, cut or milled, they generate a hazardous microscopic respirable fraction. It is essential to analyse the material safety data sheets to correctly calibrate the filtration levels required in the department.
When is a HEPA filter or a Longopac system required?
The absolute HEPA H14 filter becomes necessary as a final safety barrier if respirable crystalline silica is present in the environment and the air is returned directly to the department. Longopac continuous-bag collection is particularly suitable for managing pigments and fine dust, because it allows residues to be progressively sealed, reducing airborne dispersion and limiting contamination between colour changes.
Can I use a normal dust vacuum cleaner to collect ceramic slip?
No. Ceramic slip is a semi-liquid mixture with high density and strong abrasiveness. It requires a specific multi-purpose wet-and-dry industrial vacuum cleaner for solids and liquids, equipped with mechanical or electronic shut-off floats and internal deflectors. Using a dry-dust-only machine would damage the filter cartridges and seriously compromise the motor unit.
Tell us the characteristics of your ceramic process
Brooms and compressed air immediately return fine dust and crystalline silica into airborne suspension, contaminating the environment. To configure the ideal system, tell us the raw material used, the production phase, such as weighing, forming, glazing or grinding, the hourly quantity of waste, the presence of moisture, the piping layout and the operating hours per shift.
We will assess airflow, vacuum pressure, filter membranes and collection stages together to define the FEVI solution most suitable for keeping your company clean, efficient and safer.
