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
PRODUCT TECHNOLOGY
OPTISHOT
LOW MOISTURE, LOW ACCELERANT SHOTCRETE CASTABLES
THE SHOTCRETE
PROCESS
•
•
•
•
•
Thoroughly Mix Material
Pump Material
Add Air/Accelerator at Nozzle
Nozzle/Application Technique
Curing/Dryout
Shotcrete
System
Dry Material +
Measured Water
Added to Mixer
NO DUST, Minimal Rebound
at Nozzle
accelerator pump
mixer/pump
750 cfm air
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
 Reduced H20 resulting in:
• lower porosity
• 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
9
8
7
6
5
4
3
2
1
0
Accel %
Water %
Minteq
Comp.
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
OPTISHOT 60
OPTISHOT SiC 15
O
N
AB
R
AS
I
TY
PO
R
O
SI
%
•
AT
ER
•
•
•
Content
Lowest Porosity
Highest Strength
Best Abrasion
Resistance
Best Chemical
Corrosion
Resistance
16
14
12
10
8
6
4
2
0
W
• Lowest Water
OPTISHOT SiC 60
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
• 12-24 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 ( > 90 minutes @ 90 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
Shotcrete versus Gunnite – Physical Properties
60 % alumina, low cement
OPTISHOT 60
VERSAGUN 60
5.0 – 5.5
Na
SHOTCRETE
Gunning
MINTEQ
ANH / RHI / HWR
Bulk Density ( pcf )
after 230 F
after 1500 F
156
154
148
Modulus of Rupture ( psi )
after 230 F
after 1500 F
after 2000 F
after 2500 F
2200
2200
2200
3000
1650
1350
Cold Crushing Strength ( psi )
after 230 F
after 1500 F
after 2000 F
after 2500 F
11700
10100
12400
16700
8600
6700
Permanent Linear Change ( % )
after 1500 F
after 2000 F
after 2500 F
-0.1
-0.4
+ 0.1
-0.2
3.8
4.9
11.0
Water Required ( % )
Installation Method
Manufacturer
Abrasion Loss ASTM C704 ( cc )
after 1500 F
after 2300 F
AGGREGATE KILN
Kruzite 70 %
alumina brick
OPTISHOT 60
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.