\n| \n 20in<\/span><\/p>\n<\/td>\n | \n Primary\u00a0filtration\u00a0\/\u00a0two stage filtration<\/span><\/p>\n<\/td>\n | \n Hydraulic rotation\/ mechanical\u00a0rotation\/\u00a0flip open<\/span><\/p>\n<\/td>\n | \n Can be produced\u00a0separately<\/span><\/p>\n<\/td>\n | \n Can be produced\u00a0separately<\/span><\/p>\n<\/td>\n<\/tr>\n\n| \n 23in<\/span><\/p>\n<\/td>\n | \n Primary filtration\/two stage filtration<\/span><\/p>\n<\/td>\n | \n Hydraulic rotation\/ mechanical\u00a0rotation\/\u00a0flip open<\/span><\/p>\n<\/td>\n | \n Can be produced\u00a0separately<\/span><\/p>\n<\/td>\n | \n Can be produced\u00a0separately<\/span><\/p>\n<\/td>\n<\/tr>\n\n| \n 26in<\/span><\/p>\n<\/td>\n | \n Primary filtration\/two stage filtration<\/span><\/p>\n<\/td>\n | \n Hydraulic rotation\/ mechanical\u00a0rotation\/\u00a0flip open<\/span><\/p>\n<\/td>\n | \n Can be produced\u00a0separately<\/span><\/p>\n<\/td>\n | \n Can be produced\u00a0separately<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nWhy matched filtration matters<\/h3>\nMatched filter media ensures pore size, thickness and porosity are scaled to the casting flow rate. Proper matching prevents premature clogging and minimizes head loss while maintaining high capture efficiency for micron-sized particles.<\/p>\n Comparison with common filtration options<\/h2>\nTable 1: Performance comparison summary<\/h3>\n\n \n \n\n\n| Feature<\/th>\n | ADtech plate-type unit with ceramic foam<\/th>\n | Tubular filter unit<\/th>\n | Ordinary plate-type unit<\/th>\n<\/tr>\n<\/thead>\n | \n\n| Micron-level capture<\/td>\n | High efficiency for sub-micron to micron particles.<\/td>\n | Moderate, can trap larger inclusions<\/td>\n | Lower, limited fine particle adsorption<\/td>\n<\/tr>\n | \n| Heat-up speed<\/td>\n | Fast<\/td>\n | Moderate<\/td>\n | Moderate<\/td>\n<\/tr>\n | \n| Lining durability<\/td>\n | High with high-silicon melt technology.<\/td>\n | Variable; some designs erode faster<\/td>\n | Lower<\/td>\n<\/tr>\n | \n| Maintenance frequency<\/td>\n | Lower due to durable lining<\/td>\n | Higher due to replacement elements<\/td>\n | Higher<\/td>\n<\/tr>\n | \n| Cost per ton filtered<\/td>\n | Competitive, improved TCO<\/td>\n | Higher for high-volume or high-purity needs<\/td>\n | Variable<\/td>\n<\/tr>\n | \n| Flow stability<\/td>\n | Produces laminar filling when matched with filters<\/td>\n | Can exhibit turbulence if not sized<\/td>\n | Often inconsistent<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n Notes: choice depends on alloy, casting geometry and production cadence. Industry tests show ceramic foam and well-engineered plate boxes produce better surface finish and lower inclusion counts for precision castings.<\/p>\n Technical specifications and options<\/h2>\nThe table below lists representative configurations. ADtech offers customization to match ladle size, casting rate and alloy family.<\/p>\n Table 2: Example specification matrix<\/h3>\n\n \n \n\n\n| Item<\/th>\n | Typical value or range<\/th>\n<\/tr>\n<\/thead>\n | \n\n| Box material lining<\/td>\n | High-silicon refractory composite with anti-stick treatment.<\/td>\n<\/tr>\n | \n| Compatible filter media<\/td>\n | Ceramic foam filters (varied PPI), refractory plate filters<\/td>\n<\/tr>\n | \n| Filter plate dimensions<\/td>\n | Custom lengths and widths; common sizes 200 mm x 200 mm up to 400 mm x 600 mm<\/td>\n<\/tr>\n | \n| Filtration accuracy<\/td>\n | From coarse inclusion capture down to micron-level by selection of filter media.<\/td>\n<\/tr>\n | \n| Operating temperature<\/td>\n | 650\u00b0C to 800\u00b0C typical, dependent on alloy<\/td>\n<\/tr>\n | \n| Heating method<\/td>\n | Electric heating jackets and insulated covers<\/td>\n<\/tr>\n | \n| Throughput<\/td>\n | From small batch ladles to continuous lines; units sized by kg per hour<\/td>\n<\/tr>\n | \n| Automation<\/td>\n | Manual, hydraulic rotation, or motorized rotation loading for filter change<\/td>\n<\/tr>\n | \n| Safety<\/td>\n | Thermal insulation, lifting lugs, cover interlocks, ventilation recommendations<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\nCeramic foam filter pairing and media selection<\/h2>\nCeramic foam filters are the preferred media when the goal is removal of sub-micron inclusions while promoting laminar flow. Key selection variables include pore density (PPI), thickness and chemistry.<\/p>\n Table 3: Typical ceramic foam filter properties<\/h3>\n\n \n \n\n\n| Property<\/th>\n | Typical range<\/th>\n | Effect on casting<\/th>\n<\/tr>\n<\/thead>\n | \n\n| Pore density (PPI)<\/td>\n | 10 to 70 PPI<\/td>\n | Lower PPI permits higher flow; higher PPI traps smaller particles.<\/td>\n<\/tr>\n | \n| Porosity<\/td>\n | 80 to 90%<\/td>\n | Balances flow rate with capture capability.<\/td>\n<\/tr>\n | \n| Composition<\/td>\n | Alumina-based with SiC or ZrO2 variants<\/td>\n | Choose based on melt reactivity and erosion resistance.<\/td>\n<\/tr>\n | \n| Thickness<\/td>\n | 25 mm to 75 mm<\/td>\n | Thicker filters increase residence time and capture but increase head loss<\/td>\n<\/tr>\n | \n| Thermal shock resistance<\/td>\n | 750\u00b0C to 1100\u00b0C ratings<\/td>\n | Important for durability during multiple thermal cycles.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n Practical tip: begin with a mid-range PPI for process validation, then refine pore size and thickness using trapped inclusion analysis and pouring flow observations.<\/p>\n Metallurgical benefits for precision alloys<\/h2>\n\n- \n
Reduced surface blemishes and blowholes<\/strong> which lowers machining scrap and trimming work.<\/p>\n<\/li>\n- \n
Fewer internal inclusions<\/strong> that act as crack initiators, improving fatigue and tensile uniformity.<\/p>\n<\/li>\n- \n
Improved melt homogeneity<\/strong> by removing entrained dross that can cause localized defects.<\/p>\n<\/li>\n<\/ul>\nThese benefits are particularly important for high-precision components in automotive structural parts, electrical housings, and components where cosmetic finish matters.<\/p>\n Installation, commissioning and operation checklist<\/h2>\n\n- \n
Verify box orientation, nozzle alignment and thermal insulation before first heat.<\/p>\n<\/li>\n - \n
Pre-heat the box to recommended temperature to prevent thermal shock to filter media.<\/p>\n<\/li>\n - \n
Install filter media making sure seals are complete to prevent bypass.<\/p>\n<\/li>\n - \n
Set pouring head and flow rates to match filter-rated throughput.<\/p>\n<\/li>\n - \n
Run initial trial castings with sample analysis using Reduced Pressure Test or cut sections to confirm inclusion reduction.<\/p>\n<\/li>\n<\/ol>\n Operational note: filter boxes must be integrated so that metal flows through the filter under gravity and does not bypass around the plate edges. Proper gaskets or refractory seals are essential.<\/p>\n Maintenance, wear and expected service life<\/h2>\n\n- \n
Lining longevity<\/strong>: ADtech high-silicon lining shows extended life in trials due to reduced chemical interaction and non-stick properties. Scheduled inspections at planned production pauses preserve reliability.<\/p>\n<\/li>\n- \n
Filter replacement<\/strong>: ceramic filters are consumables and should be changed when head loss or clogging reduces flow below production needs. Keep spare filters in temperature-controlled storage.<\/p>\n<\/li>\n- \n
Spare parts<\/strong>: maintain spare gaskets, heating elements, cover seals and any motorized lifting components to minimize unplanned downtime.<\/p>\n<\/li>\n<\/ul>\nTable 4: Typical maintenance schedule<\/h3>\n\n \n \n\n\n| Interval<\/th>\n | Task<\/th>\n<\/tr>\n<\/thead>\n | \n\n| Daily<\/td>\n | Visual check for leaks and overheating, confirm gas lines if used<\/td>\n<\/tr>\n | \n| Weekly<\/td>\n | Inspect seals and remove accumulated dross from skimming areas<\/td>\n<\/tr>\n | \n| Monthly<\/td>\n | Check heater elements and thermal insulation condition<\/td>\n<\/tr>\n | \n| Quarterly<\/td>\n | Full inspection of lining and mechanical components, replace worn gaskets<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\nEnvironmental, safety and regulatory considerations<\/h2>\n\n- \n
Provide local exhaust ventilation for fluxing or skimming operations.<\/p>\n<\/li>\n - \n
Handle spent filter media and dross according to local waste regulations. Some collected material may be recyclable through metal recovery streams.<\/p>\n<\/li>\n - \n
Install oxygen or gas monitors if inert atmospheres or gas lines are present, since argon or nitrogen can present asphyxiation hazards.<\/p>\n<\/li>\n - \n
Use PPE for molten metal handling, including heat-resistant gloves, face shields and protective clothing.<\/p>\n<\/li>\n<\/ul>\n Economic rationale and return on investment<\/h2>\nAdopting the ADtech plate-type filtering unit reduces scrap and downstream rework, which frequently offsets the initial purchase within a reasonable period for medium to large casthouses.<\/p>\n Table 5: Illustrative ROI example<\/h3>\n\n \n \n\n\n| Metric<\/th>\n | Example value<\/th>\n<\/tr>\n<\/thead>\n | \n\n| Annual throughput<\/td>\n | 3,000 tonnes<\/td>\n<\/tr>\n | \n| Pre-install scrap from inclusions<\/td>\n | 2.0%<\/td>\n<\/tr>\n | \n| Post-install scrap<\/td>\n | 0.7%<\/td>\n<\/tr>\n | \n| Annual metal saved<\/td>\n | 39 tonnes<\/td>\n<\/tr>\n | \n| Annual savings (metal value + machining)<\/td>\n | Site-specific, often four-figure to six-figure savings per year<\/td>\n<\/tr>\n | \n| Typical payback range<\/td>\n | 6 to 24 months depending on production mix and metal prices<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n Note: run site-specific trials and include labor and consumable costs to produce accurate payback estimates.<\/p>\n FAQs<\/h2>\n | | | | | | | |