Heat Resistance Refractory Gunning Refractory Spray Paint

Heat Resistance Refractory Gunning Refractory Spray Paint

Refractory spray paint is an unformed refractory material made by mechanical spraying using pneumatic tools.

Refractory spray paint consists of refractory fillers, powders and binders (or additives).

Due to the repeated repeated exposure of cement and aggregates and other components of the materials during the spraying process to facilitate the compaction of the sprayed materials, the sprayed layer has better density and mechanical strength.

Refractory spray paints are classified into light spray paints, medium and heavy spray paints and heavy spray paints according to the bulk density of the material.

Lightweight refractory spray paint is used as a heat retaining and heat insulating substrate, medium and heavy spray paint can be used as a heat insulating substrate, while heavy spray paint is mainly used as a working substrate.

Refractory spray paint has become one of the major unformed refractory materials used in many industrial furnace linings.

Refractory spray paint can be used to build up and repair the furnace lining and lining in a cold state in a protective layer, and is suitable for repairing the lining of the furnace when hot.

Characteristics:

1. Good casting properties
2. Low thermal conductivity
3. Good heat resistance

Construction method:

Actually, the refractory spray paint design combines transportation, pouring or tamping in one process, without or just one-sided stencil, simple process, high efficiency and wide adaptability.

Depending on the order of water (or solution) addition and the amount of water used, refractory spray paint can be divided into three types: wet method, semi-dry method, and dry method.

The wet method is to mix the spray material into a slurry before spraying.

The semi-dry method is to first wet the spray material, press it against the nozzle and then add the rest of the water (or solution), and the water consumption (or solution) of the dry method is everything. mouthpiece, including the most common semi-dry method.

Process characteristics Refractory spray material is used by spraying.

The relationship between the material mixture, the spraying operation, the recoil rate and the processing properties is as follows.

The mixing ratio of the spray coating must meet the following conditions: to achieve the required strength, less rebound, less spray dust, good adhesion and not cause blockage of the pipe.

When spraying dry or semi-dry with cement binders, the amount of cement is about a quarter of all materials.

Too much cement will increase the amount of dust during spraying and shrinkage of the sprayed coat after curing.

Spraying has an important influence on the quality of the spray paint and the number of rebounds.

Adjust the distance from the nozzle to the sprayed surface.

Usually, the nozzle should be perpendicular to the sprayed surface, move in a spiral trajectory and control the pressure of the sprayed air.

The thickness of the aerosol will depend on the spray paint not slipping or falling, but each time the secondary spray coating should not be too thin so as not to increase the recoil rate

rocessing procedure for blast furnace lining:

1. Prepare the machine

2. Control of oven temperature (<110 ℃) and gas (<50 ppm)

3. Clean the oven wall and the cooling plate

4. Mixing material

5. Adjust the spray thickness and height with the machine

6. Spray with a manipulator