Presentation on theme: "MINTEQ INTERNATIONAL, INC. Advanced Self-Flow & Shotcrete Materials Compared to Traditional Gunnite."— Presentation transcript:
MINTEQ INTERNATIONAL, INC. Advanced Self-Flow & Shotcrete Materials Compared to Traditional Gunnite
GUNNITE NOZZLE Dry Material is pnuematically conveyed through large hose. Water is introduced and mixed with material at the nozzle via a water ring. Water addition is controlled via a valve at the nozzle.
Refractory Gunnite Features Simple Equipment, Easy Set Up Nozzle can be up to 1000 ft. horizontally or 500 ft. vertically from the gun Water added at the nozzle Water addition ( and product quality ) is controlled by the nozzle operator. Highly variable. Subject to operator expertise. Water / Material Mix time Very dusty Allows for castable refractory to be installed without forms High Rebound & Waste ( 15 – 20 % ) Slow Installation Rates Average 2 tons per hour out of one machine if working efficiently Physical properties very limited
THE SHOTCRETE PROCESS Thoroughly Mix Material Pump Material Add Air/Accelerator at Nozzle Nozzle/Application Technique Curing/Dryout
ShotcreteSystem 750 cfm air mixer/pump accelerator pump NO DUST, Minimal Rebound at Nozzle Dry Material + Measured Water Added to Mixer
SHOTCRETE NOZZLE Castable is mixed with pre-measured water in a high intensity pan style mixer and conveyed to the nozzle via a high pressure concrete pump. At the nozzle, compressed air and minimal accelerator are introduced to the material.
Most Advanced Dispersant Technology Critical Raw Material Selection Critical Raw Material Selection Reduced H 2 0 resulting in: Reduced H 2 0 resulting in: lower porosity lower porosity improved physical properties improved physical properties
WATER LEVEL IMPLICATIONS High Water Levels Required to Install Gunnite and Competitive Shotcrete Materials Reduce Strength and Increase Porosity High Water Levels Require High Accelerator Levels
OPTISHOT PRODUCTS Low Water Demand Equates to Very Low Accelerator Demand Minteq’s Shotcrete Materials Retain Their Cast Properties Minteq’s Materials Were Designed as Shotcrete Materials From The Start
OPTISHOT PRODUCTS Lowest Water Content Lowest Porosity Highest Strength Best Abrasion Resistance Best Chemical Corrosion Resistance
Higher Water Contents Create Higher porosity has a negative effect on: Strength Corrosion Resistance Alkali Penetration
REFRACTORY TECHNOLOGY Why Does Minteq Material Succeed When Competitors Fail? –Superior Technology Products –OPTISHOT MATERIALS –STARSLICK System –PROCESS CONTROL –ENGINEERED INSTALLATION EQUIPMENT & FIELD EXPERIENCE
SHOTCRETE PROCESS CURING/DRYOUT Low Moisture Castable Hour Cure at Room Temperature (60-90°F) (not necessarily ambient) Standard, Controlled Dryout Dryout Schedule With Hold Points FAST FIRE Shotcrete products allow for rapid dry-out / no hold periods
MINTEQ Shotcrete Features Rapid Installation Rates 8-10 Tons Per Hour Through 1 Pump/nozzle Improved Performance “Cast” Lining System Without The Time Consuming Forms No Dust Minimal Rebound ( typically 2-5 % ) FAST FIRE Shotcrete Products Allow for Reduced Dry-out Time All Products Must Pass a Pumping Test All Products Must Pass A Room Temp Workability Test ( >3 Hours ) All Products Must Pass A Hot Stability Test ( > F ) All Technical Data Processed on Actual Pumped & “Shot” Panels
MINTEQ Shotcrete Benefits & Customer Value Improved Refractory Life / Furnace Performance “Cast” Lining System Without The Forms Reduced Refractory Waste During Installation Reduced Furnace / Vessel Downtime Reduced Curing & Dry-out With FAST FIRE Products Increased OEE ( operating equipment efficiencies ) Lower Operating Costs
60 % alumina, low cement OPTISHOT 60 VERSAGUN 60 Water Required ( % )5.0 – 5.5Na Installation MethodSHOTCRETEGunning ManufacturerMINTEQANH / RHI / HWR Bulk Density ( pcf ) after 230 F after 230 F after 1500 F after 1500 F Modulus of Rupture ( psi ) after 230 F after 230 F after 1500 F after 1500 F after 2000 F after 2000 F after 2500 F after 2500 F Cold Crushing Strength ( psi ) after 230 F after 230 F after 1500 F after 1500 F after 2000 F after 2000 F after 2500 F after 2500 F Permanent Linear Change ( % ) after 1500 F after 1500 F after 2000 F after 2000 F after 2500 F after 2500 F Abrasion Loss ASTM C704 ( cc ) after 1500 F after 1500 F after 2300 F after 2300 F Shotcrete versus Gunnite – Physical Properties
AGGREGATE KILN OPTISHOT 60 Kruzite 70 % alumina brick MINTEQ shotcrete shows 1.5 – 2.0” less wear than a 70 % alumina firebrick after 1 year in the feed end of the kiln. Both materials were installed at the same time.