Refractory Materials for Steel Ladle
Product Application: Steelmaking, Ladle
Product Case: Yueyufeng Steel Ladle is cast in its entirety, Valin Steel provides carbon steel-free steel bricks and overall contracting, Indonesia Kasteel ladle overall contract, etc.
Product Classification: Refractory materials for steelmaking
Product Description: Refractory materials for steel ladle is used in accordance with different smelting technology and slag composition, such as refractory castings used in ladle; Magnesia carbon brick for refining ladle. Now let’s look at the refractory for steel ladle.
Steel ladle is a kind of container for carrying steel water from steelmaking electric furnace to tundish or pouring site by special track.
The refractory used for ladle is divided into working layer and insulating layer. The ladle refractory is used in accordance with different smelting technology and slag composition, such as integral pouring for ladle. Magnesia carbon brick for refining ladle; Non-carbon steel brick compound masonry for low carbon steel smelting. Next we will introduce the refractory for steel ladle.
Refractory construction method and time for ladle
Ladle with integral casting is currently more steel companies choose way of ladle lining construction with monolithic refractories whole pouring construction in just 3 days, the price is lower than brick, use times higher than that of the brick masonry, can exceed 50-100 times.
Case study of refractory used in ladle
Yueyufeng steel ladle integral pouring, hua ling ripple steel without carbon steel bricks and overall contracting, Indonesia ka steel ladle integral contracting, etc.
Introduction of steel ladle refractory materials
- Magnesium aluminum castable materials and rigid jade castable materials are used in the working layer of ordinary steel bags; Magnesia carbon brick for working layer of refining ladle.
- characteristics of working layer refractory
- high temperature resistance, high strength and good volume stability.
- good insulation performance and reasonable solidification time.
- good corrosion resistance, erosion resistance and thermal shock resistance.
- physical and chemical indexes of refractory used in working layer of ladle
| Items | RSTB-80 | RSZB-78 | |
| Chemical Composition,% ≥ | Al2O3+MgO | 80 | 78 |
| Al2O3 | 70 | 70 | |
| Volume Density,g/cm3 ≥ | 110℃×24h | 2.65 | 2.75 |
| Compression Strength,Mpa ≥ | 110℃×24h | 25 | 30 |
| 1600℃×3h | / | 50 | |
| Rupture Strength,Mpa ≥ | 110℃×24h | 0.5 | 5 |
| 1600℃×3h | / | 10 | |
| Rate of line change after burning,% | 1600℃×3h | ±1.2 | ±1.0 |
| Application | Wall and bottom repair material | Ladle integral cast material | |
- Characteristics of magnesia carbon brick
- high fire resistance.
- high strength and good slag resistance.
- good thermal shock stability.
- strong resistance to erosion and skinning.
- Physical and chemical indexes of magnesia carbon bricks
| Items | RS-MT-10 | RS-MT-14 |
| MgO,% ≥ | 78 | 75 |
| C,% ≥ | 10 | 14 |
| Porosity,% ≤ | 5 | 4 |
| Volume density,g/cm3 ≥ | 2.85 | 2.8 |
| Cold crushing strength,Mpa ≥ | 50 | 40 |
| Thermal buckling strength,Mpa 1400℃X0.5h ≥ | 6 | 8 |
| Application | Pool area | Bottom and slag line area |
- Vacuum ceramic fiber felt for ladle insulation layer
- Properties of fiber felt for insulation layer
- high compressive strength and long service life
- low thermal capacity and low thermal conductivity
- easy installation and convenient construction.
- good insulation effect and stable performance.
- Aluminum carbon bricks used in the water outlet area of ladle
- Characteristics of hydraulic base bricks
- stable structure, anti-erosion and corrosion resistance
- good thermal shock stability and long service life
- physical and chemical indexes of shuikou brick
| Items | RS-SK-1 | RS-SK-2 | RS-SK-3 |
| Al2O3,% ≥ | 70 | 75 | 85 |
| C,% ≤ | 8 | 8 | 5 |
| Volume density,g/cm3 ≥ | 2.7 | 2.8 | 2.9 |
| Volume Density,% ≤ | 14 | 14 | 13 |
| compression strength,Mpa ≥ | 60 | 70 | 90 |
- Breathable brick at the bottom of the steel ladleis made of rigid jade or chromium-rigid jade
- Features of breathable brick
- breathable brick has high fire resistance
- good thermal shock stability
(3) good resistance to slag erosion and skinning
(4) high weight softening temperature, low creep and low thermal shrinkage
- Physical and chemical indexes of ladle breathable brick
| Items | Corundum breathable brick | Chrome-Corundum breathable brick | Corundum spinel breathable brick | Low silica chrome corundum breathable brick |
| Al2O3，% ≥ | 94 | 90 | 85 | 90 |
| Cr2O3，% ≥ | – | 4 | – | 3 |
| MgO，% ≤ | – | – | 5 | 4 |
| Volume density,g/cm3 ≥ | 3 | 3 | 3 | 3 |
| compression strength,Mpa ≥ | 100 | 80 | 80 | 80 |
| Rate of line change after burning,1500℃ % | 0- +0.3 | 0- +0.4 | 0- +0.3 | 0- +0.4 |
| Air volume,0.4MPa/m3 | 12-60 | 12-60 | 12-60 | 12-60 |
| Annotation | Ventilation quantity can according to user requirements and ladle size design | |||
- Magnesium tamping material is used to fill the seam of ladle
Magnesia ramming material is made from magnesia raw materials and additives, erosion resistance, resistance to erosion, construction is convenient wait for a characteristic, for around the block at the bottom of the ladle and tundish bottom caulking around the block.
Performance requirements for ladle refractory
- High temperature resistance and high refractoriness.
- Good thermal shock stability
- Strong resistance to slag erosion, erosion and peeling
- High weight softening temperature and low creep
- Anti-oxidation and easy maintenance
Price of steel ladle refractory materials
How much is the steel ladle refractory materials, 4,000 to 6,000 a ton. First ladle refractory material is according to the actual situation of the user to provide, RS can design good application scheme and construction technology, etc., to determine the price of ladle refractory materials used, so this quotation is for reference only, if you have the need can contact RS sales.
Process of steel ladle refractory materials
By vacuum ceramic fiber felt by anchoring nails and wire installed on ladle thermal insulation layer, and then use the castable with mold by ladle pouring, the bottom of the bag impact area use of alumina magnesia castable or precast block, vent brick and runner brick use corundum brick and aluminum carbon brick with refractory mortar masonry and construction after the ladle baking, can be used after baking. The general construction time is about 2 weeks.
Matters Need Attention of Steel Ladle Refractory Materials
- Do a good job of “three precautions” when storing, and handle and load with care.
- Storage by classification and material classification. No stacking or confusion is allowed.
- If the refractory is damaged in the course of use, it shall decide whether to continue to use it or not according to the situation.
- During the masonry process, masonry shall be built according to materials and marks to prevent mixed masonry of different materials.
- If the inner lining of the ladle falls off during use, it shall stop working and repair in time.
Above is the simple introduction ladle refractory material, steel enterprises smelting steel used by different refractory material types, material also different, rongsheng is a professional manufacturer of refractory material and can accord to your requirements for you to customize the ladle refractory materials used, guarantee use the ladle.
