Cast blast lined pipe and fittings is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
According to customer requirements along with cast basalt production technology and we can offer various specifications and various shapes to meet client’s need.
• Friction Resistance: As more material is passed over Cast Basalt it gets polished up thereby reducing friction further. Cast Basalt improves in service after getting polished. Wetting also improves its performance in practical applications.
• Impact Resistance: Direct Impact Resistance at 90 degrees is low like all other ceramics, but it can be increased with proper installation by reducing the angle of impact. Cast Basalt is the best wherever sliding abrasion exists. Moreover, external impact strength of composite basalt pipe (enclosed in M.S. Shell) is always more than that of bare Ni-hard Pipe.
• Chemical Resistance: Cast Basalt is almost absolutely acid/alkali resistant (except Hydrofluoric Acid) and hence corrosion resistant.
• Weight and Sizes: Basalt Tiles are available in regular shape square of 200 x 200 x 30 mm thick, weighing approx. 90 kg/sq m; whereas bends and pipes are lined using Basalt Cylinders of various standard sizes from 50NB to 500NB.
• Temperature: Cast Basalt withstands temperature up to 4500°C
Cast Basalt is a mineral of exceptionally high abrasion resistance, unlimited resistance to moisture, high compressive strength and resistance to virtually all acids and alkalis and is completely corrosion free. Cast blast is produced by melting selected natural basalt broken into sizes of 20-50 mm in shaft furnaces at temperatures around 1,300C, following by casting at which the melted basalt forms, uniforms crystals hence producing its typical physical properties, in particular its exceptional hardness and wear-resistance.
Cast basalt reaches a value of hardness of 8(min) on the Moh’s hardness scale. For comparison: the highest value10is only attained by diamonds. By virtue of these properties, the silicate cast basalt provides outstanding protection against abrasion and scrubbing.
However, it is marked by ascertain sensitivity to impacts. Under Normal services conditions, cast basalt withstands temperatures up to approx. + 350C or-40C. However Cast basalt should not be subjected to temperature shocks.
Sizes: Cast basalt produces are manufactured as tiles, from pieces and segments. Straight pipes are spun-cast, available for nominal bores of 32 to 600 mm with the wall thickness ranging from 20 to 30mm and a standard length of 500mm. smaller nominal bores of straight pipes, pipe segment for radial of 40 to 3,000mm of various angles, as well as special form piece linings are predominantly sand-cast. The standard wall-thickness is 20mm. Depending on the respective quantity, steel moulds can also be used, the wall thickness in those cases usually being 30 to 40mm.
Data of cast basalt tiles
Chemical component
| SiO2 |
Al2O3 |
Fe2O3 |
TiO2 |
CaO |
MgO |
K2O |
Na2O |
FeO |
P2O5 |
MnO |
| 42-45% |
13-16% |
13-14% |
0.022 |
10-12% |
10-11% |
0.045 |
0.045 |
13-14% |
<1% |
<1% |
Physical property
| NO. |
ITEM |
PERFORMANCE VALVE |
| 1 |
Specific gravity |
2.9-3.05gm/cc |
| 2 |
Compressive strength |
3000-4500kg per sq cm(min) |
| 3 |
Bending strength |
300kg per sq cm(min) |
| 4 |
Water Absorption |
0 |
| 5 |
Solubility in Acids |
0.006 |
| 6 |
Hardness |
8(MIN.)Moh Scale |
| 7 |
Modules of elasticity |
11.1×104N/mm2 |
| 8 |
Expansion coefficient (room temperature to 60°C) |
0.75×10-5/K |
| 9 |
Thermal Conductivity |
1.15W/mk |
| 10 |
Special Heat Capacity |
0.8kj/Kg.K |
| 11 |
Highest Temperature For application |
350°C |
Advantages:
* Utilizing Cast Basalt enhances and improves the operational life of plants.
* These are best suited for jobs where extensive cutting is needed.
* We can also deliver pre-cut, tailored tiles based on the considerations of vibration, impact and other factors at client’s end.
Standard specification
Thickness
(mm) |
Length * Width
(mm) |
| 16-20 |
< 200 |
| 20-30 |
< 300 |
| 30-50 |
< 400 |
Why are cast basalt lined pipes so wear-resistant
The moulding process of cast basalt lined pipe includes solution casting, sintering and thermal direct sintering. So, why the cast basalt lined pipe is very wear-resistant cast basalt lined pipe has been widely used in building materials, chemical industry, metallurgy, mining and other industries. Cast basalt lined pipe is an ideal substitute material for steel, iron, lead, rubber, wood, etc. In some parts of many equipment. Individual metals cannot achieve high wear resistance, acid and alkali corrosion resistance, and have the advantages of extending equipment service life, reducing maintenance man-hours, improving production efficiency, and reducing product costs.
The cast basalt lined pipe has the characteristics of thoughtful structure, low water absorption, high compressive strength and good wear resistance. Except hot phosphoric acid, hydrofluoric acid and dissolved alkali above 30℃, it has good corrosion resistance to almost all inorganic acids, organic acids, alkalis, salts, water and organic solvents. The brittle material of cast stone has high hardness, and the problem of cast stone is that it is brittle and is not easily impacted by heavy objects.
Under the microscope, the cast stone can be seen interlaced with individual pyroxene spheres or feather-like crystallites of 0.05-0.1 mm. The thoughtfulness of this internal structure greatly improves the hardness of the cast stone, and its mohs hardness reaches 7~8. The greater the hardness of the material, the better the wear resistance. From the point of view of atomic and molecular structure, the combination of silicon and oxygen atoms of this silicate mineral is connected with each other by a strong force.
Individual cast basalt lined pipes have good wear resistance in blast furnace tank utilization, and meet application requirements in terms of wear resistance, but there are also brittleness of ceramic materials, which are easily broken during the process of falling ore. The construction of single-piece pasting is incomplete, and signs of aging will appear after a long time of pasting. The wear-resistant material not only has good wear resistance in the use of blast furnace tanks, but also meets the application requirements in terms of wear resistance, and has a mortar material, which is tough and will not be smashed in the process of falling ore. Good performance, combined with cement, not limited by time and so on. The wear resistance of cast basalt lined pipes is also the reason for their widespread use.
Application area
- Thermal Power Stations: Raw Coal Chutes/ Hoppers, Feed Bunker/Coal Bunker, Ash Pits, Crushers, Bottom Ash, Disposal Slurry, Dust Lines/ Bends, Pipeline/Bends, Fly Ash. Trenches below Hopper and pipelines, Pulverized Coal Piping.
- Cement Plants: Dynamic Air Separators, Raw Mill Ducts/ Chutes, Drag Chain Conveyor, Grate Cooler Housing, Air Separator/ Cyclones, Coal Handling, Coal Hopper/ Chutes, Cement Conveying, Slurry Lines/ Bends Lines/ Bends, Discharge Boxes / Bankers, Lime/Silica Hoppers/Chutes, Chain Conveyor Housing, Mixers/Nozzles, Coal Venturi, etc.
- Steel plants: Coke sorting unit, Coal bunkers / sinter bunkers, Lime bunkers, Coke breeze, Sinter plant cyclones, Sinter plant flow conveyors, Iron slurry line, Thick slurry lines, Air lift pipes, Telescopic pipes, Granulated slag, Hot mill flume, etc.
- Coal Washer: Coal Washing Plants, Coal Transportation, Conveyor Chutes/Pipes, Floatation Cells, Media Sumps, Centrifuges, Cyclones, Sieves etc.
