This document describes REFRASPRAY®, a refractory concrete that allows for fast and effective hot or cold repairs in industrial plants. REFRASPRAY® can be spray or trowel applied, enabling repairs without shutting down the plant. It provides significant savings in time, material, energy and increased plant availability compared to standard repair methods. The document outlines the product range of REFRASPRAY® concretes made from andalusite, corundum, tabular alumina or fireclay.

1. REFRASPRAY®
The fast and lasting solution
for hot and cold repairs.

2. REFRASPRAY®
The ideal monolithic product for repairs
As a systems supplier, we devel-
op and manufacture refractory
concepts for specific processing
technologies in order to achieve
optimum plant efficiency as well as
uniform quality of our customers'
products.
Topics such as energy efficiency,
time saving, and higher plant
availability are becoming increas-
ingly important. For this, high-grade
refractory concretes make a decisive
contribution.
REFRASPRAY® is a refractory con-
crete that can be applied (trowel or
spray) in a hot or cold plant. This
enables intermediate repairs to be
carried out quickly, without having
to let the plant cool down.
For customers, this means consid-
erable savings in time and material,
increased safety, and lower energy
losses.
The challenge:
For conventional hot or cold repairs,
e.g. on casting ladles and covers, a
time of roughly one day is required,
plus about 1 to 1,2 tons of repair
material.
The solution:
We have developed a monolithic
line of products that cuts the repair
times and improves the working
conditions: REFRASPRAY®.
Use of REFRASPRAY® in a casting ladle
2©Refratechnik Steel GmbH

3. REFRASPRAY®
Four decisive advantages
The product range
The REFRASPRAY® product range is
based on four primary raw materials:
• Andalusite
• Corundum
• Tabular alumina
• Fireclay
REFRASPRAY® products are cement-free,
pumpable refractory concretes that are
mixed with about 25% water.
4. Simple application
Another advantage of REFRASPRAY®
is its simple application. For spray
­application, a peristaltic pump is used.
For trowel application, only a mixer is
needed.
1. Energy saving
REFRASPRAY® makes intermediate
repairs possible, without the need to let
the plant cool down first. For the customer,
this results in up to 30% lower energy
­consumption.
2. Time saving
REFRASPRAY® enables the repair
time to be cut from a whole working
day to less than 2 hours.
3. Plant availability
With REFRASPRAY®, plant availability is
considerably increased. Plant productivity
is increased lastingly due to fewer down-
times for repairs.
100
80
60
40
20
0
Energydemand(%)
Standard
cold repair
Repair with
REFRASPRAY®
-30%
-22 hrs
24
12
0
Repairtime(hrs)
Standard
cold repair
Repair with
REFRASPRAY®
Quality Raw material
basis
Bulk
density
[g/cm³]
Water
content
[l/100kg]
Chemical composition Properties
Al2
O3
SiO2
Fe2
O3
MgO BaO
REFRASPRAY® A-72 TS Andalusite 2.45 17.5-23.0 > 72.0 < 19.0 < 0.8 Thermal shock resistant
REFRASPRAY® C-84 CR-7 SP Rich in tabular
alumina
2.55 18.0-24.0 > 83.0 < 1.5 < 0.3 > 5.0 Contains spinel
REFRASPRAY® F-50 R Fire clay 2.10 22.0-26.0 > 50.0 < 35.0 < 0.6 Resistant to reducing
atmospheres
REFRASPRAY® F-65 AL Fire clay 2.40 22.0-26.0 > 64.0 < 20.0 > 6.0 Resistant to contact
with molten aluminium
REFRASPRAY® MW 1350 Light fireclay 1.55 25.0-30.0 > 50.0 < 40.0 Insulating
REFRASPRAY® T-85 AL Tabular alumina 2.50 18.0-23.0 > 84.0 < 4.0 < 0.2 > 6.0 Resistant to contact
with molten aluminium
REFRASPRAY® T-90 SP/R Tabular alumina
+ spinel
2.55 20.0-27.0 > 88.0 < 4.0 < 0.2 < 6.0 Resistant to reducing
atmospheres/
contains spinel
3©Refratechnik Steel GmbH

4. Refratechnik Steel GmbH
Schiessstrasse 58
40549 Düsseldorf
Germany
Telephone +49 211 5858 0
Fax +49 211 5858 49
steel@refra.com
www.refra.com
St1-045-09/2016St1-045-09/2016