High Alumina Mortar

Use of High Alumina Refractory Mortar

High alumina refractory mortar is widely used in various industrial kilns made of high alumina bricks.

For example, in a hot blast stove, it is used to build a furnace roof, a regenerator, a combustion chamber, and the like.

Used in parts such as the upper part of the blast furnace.

It can also be used to repair industrial furnace roofs, furnace walls and other parts.

Good plasticity, convenient construction; strong bonding strength, strong corrosion resistance; high refractoriness; good slag resistance; good thermal exfoliation. It is generally used for refractory brick masonry with aluminum content.

high alumina refractory mortar
high alumina refractory mortar

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The Role of High Alumina Mortar Additive

Soft clay is added to the high alumina refractory mortar to improve workability, such as spreadability and adhesion. The use of soot silicon micropowder instead of soft clay can reduce the sintering temperature.

In addition, other additives for High alumina mortar mainly include precipitants, stabilizers, plasticizers and anti-shrinkage agents.

The role of the precipitant is to reduce the amount of water added;

The stabilizer prevents the solid-liquid separation phenomenon of the refractory mud which is adjusted during the standing process;

Add plasticizer to improve the spreadability of the mud and prevent runny;

The anti-shrinkage agent is for preventing cracking or peeling due to volume shrinkage after sintering.

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High Alumina Mortar Physical and Chemical Indicators

Item Physical and chemical indicators
LN-55 LN-65 LN-75 LN-65P LN-75P GN-85P GN-90P
W(Al2O3)/% ≥ 55 65 75 65 75 85 90
Refractoriness/℃ ≥ 1760 1780 1780 1780 1780 1780 1800
Modules of Rupture/MPa ≥ 110℃ 1.0 1.0 1.0 2.0 2.0 2.0 2.0
1400℃ * 3h 4.0 4.0 4.0 6.0 6.0
1500℃ * 3h 6.0 6.0
0.2MPa Softening temperature load degree T0.6/℃ 1400 1400 1600 1650
Permanent Linear Change/% 1400℃ * 3h -5 ~ +1
1500℃ * 3h -5 ~ +1
Bonding Time(min) 1 ~ 3
Grading/% <1.0mm 100
>0.5mm, ≤ 2
<0.075mm, ≥ 50 40
Note: If there are special requirements, the bonding time is determined by the supplier and the buyer.

High Alumina Refractory Mortar Manufacturer

Rongsheng refractory manufacturer has rich experience in the production of refractory materials. Our refractory brick plant and castable plant produce both refractory castables and various types of refractory bricks. We will deliver it to you in the shortest time after receiving your order. At the same time, if you have special needs for refractory materials, we will be happy to serve you. Designed to provide you with high quality high alumina cement mortar lining. In addition, we also provide refractory construction, you are welcome to RS!

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