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Unshaped Refractory Materials

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No.92 Jianshe West Road, Zhongyuan District, Zhengzhou, Henan,China.
albert@literefractory.com
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Why Choose Us

Henan Lite Refractory Material Co., Ltd. pays great attention to the combination and perfection of industrial chain and technology. We have a production base covering an area of 20,000 square meters, which ensures perfect quality and superior performance of all products. With a professional construction team of more than 100 people, we are capable of providing our customers with safe, efficient and environmentally friendly total solutions.

Wide Range of Applications
Refractory and Insulation Materials for Industry use are widely used in the following industry, such as Iron & steel making industry, Non-ferrous Metal industry, Building materials industry, Energy & Incineration.

Quality Assurance
We meet the highest quality requirements of ISO 9001, CE, SGS guidelines and our strict quality control system.

Products Sell Well
Our company pays more attention to the construction of service platform, and our business network has covered all provinces and cities in China. Products and services have also been extended to Indonesia, Pakistan, Turkey, Vietnam, Malaysia and Kazakhstan.

Advanced Equipment
We have a fully automatic batching system, fully automatic CNC screw press, 118m fully automatic high temperature tunnel kiln, 165m fully automatic natural gas fired high temperature tunnel kiln, two 1400°C shuttle kilns and four automated production lines.

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What is Unshaped Refractory Materials

Unshaped refractory materials often referred to as monolithic refractories offer numerous advantages n high-temperature applications. Applied on-site, they form a continuous, seamless lining, adapting perfectly to the required shape and size. If you want to know the specifications and prices of Unshaped Refractory Materials, please contact us!

Advantages of Unshaped Refractory Materials

Enhanced Thermal Efficiency
One of the primary advantages of refractory monolithics is their ability to provide superior thermal insulation. Monolithic materials can be tailored to specific boiler designs, ensuring a tight and consistent fit. This tight fit minimizes heat loss, resulting in enhanced thermal efficiency. Improved insulation means that boilers require less fuel to maintain the desired temperature, ultimately reducing energy consumption and operating costs.

Reduced Installation Time
Compared to traditional refractory bricks, which require meticulous placement and skilled labor, monolithic refractories offer a quicker installation process. The wet or plastic forms can be easily applied, tamped, or gunned into place, significantly reducing downtime during boiler maintenance or repairs. This time-saving aspect translates to cost savings, as shorter installation times mean less disruption to production schedules.

Excellent Thermal Shock Resistance
Boilers often undergo rapid temperature changes during their operational cycles. Refractory monolithics are renowned for their exceptional thermal shock resistance, as they can withstand sudden temperature fluctuations without cracking or spalling. This durability ensures a longer lifespan for the refractory lining, reducing the need for frequent repairs or replacements.

Increased Corrosion Resistance
Many boiler applications involve exposure to corrosive environments due to the nature of the materials processed or the combustion byproducts. Refractory monolithics can be engineered to resist corrosion effectively. The addition of specialized additives can create a protective barrier, reducing the risk of material degradation and extending the lifespan of the boiler lining.

Customizable Formulations
Refractory monolithics offer a high degree of customization. Manufacturers can tailor the composition of monolithic materials to suit specific boiler requirements, including temperature ranges, chemical resistance, and mechanical strength. This flexibility ensures that the refractory lining is precisely optimized for the intended application, enhancing overall performance.

Reduced Maintenance Costs

The durability and longevity of refractory monolithics contribute to a significant reduction in maintenance costs over time. With fewer repairs and replacements required, boiler operators can allocate resources more efficiently, focusing on optimizing production processes rather than addressing refractory issues.

Improved Safety
Safety is a paramount concern in industrial settings, and refractory monolithics play a crucial role in enhancing boiler safety. Their ability to withstand extreme temperatures and thermal shock minimizes the risk of unexpected failures that could lead to accidents, downtime, or environmental hazards.

Sustainable Solutions
As industries increasingly prioritize sustainability, refractory monolithics offer eco-friendly advantages. Their energy-efficient properties reduce fuel consumption, contributing to lower carbon emissions. Additionally, the longer service life and reduced need for replacements result in less waste and a smaller environmental footprint.

Types of Unshaped Refractory Materials

Plastic Refractories
Plastic refractories are mixtures that are prepared in a plastic state. These types of refractories are delivered to the consumer in the form of lumps wrapped in polyethylene wrap. When using a large mass of this type of refractory It is cut smaller and without any other action on it, it is gunned or rammed in the desired place. This plastic material is easily transformed into any desired shape.

Ramming Mixes
Ramming Mixes are those that are graded according to their particle size very carefully so that they can be applied more easily. These materials are generally delivered to the consumer in a dry form. When needed, the consumer mixes these refractories with a small amount of water and then uses them. There are some wet ramming mixes that can be used instantly.

Castables
Castability means that these materials naturally have the ability to hydraulic set. These refractories are materials that have a percentage of cement binder (usually alumina cement). When mixed with water, these refractories have the ability to be hydraulically set. Calcium aluminate adhesive materials should bond well in these refractories in order to prevent the absorption of moisture into the refractories. In addition to this, the strength of this binder starts to decrease after 6 to 12 months. These materials are applied as castings. They are also known as refractory concretes.

Gunning Mixes
Gunning mixtures are refractory materials that are prepared in the form of granules. These granules are sprayed on the intended surface. Various spray guns are used to spray these materials. They gain strength by heat and are used for repair and correction works in furnaces and pans.

Application of Unshaped Refractory Materials

Castable Prefabricated Blocks
The castable prefabricated block only needs to be heat treated at a lower temperature, it is a low carbon and green refractory material, and it is a unique technology in the refractory lining technology. It can improve the performance of the refractory lining, reduce the consumption of refractory materials, and has stable quality and reliable performance. We know that the purpose of adding steel fibers to the castable is to improve the mechanical properties of the castable, inhibit the occurrence of cracks or limit the propagation of cracks when they are formed. The figure below is a diagram of the steel fiber castable. The steel fiber castable prefabricated block is made by a special process. According to the process position and needs, it is made into a certain shape, and after demolding, heat treatment is carried out according to its working conditions.

Unshaped Refractories In Blast Furnaces
Blast furnace is an important equipment for iron making. Small blast furnaces used to be hoisted and built with high alumina cement and high alumina phosphate refractory castable prefabricated blocks. Now, resin-bonded aluminum-carbon unburned bricks are commonly used for masonry. The water wall of large blast furnace is rammed with SiC castable, and the bottom cushion and surrounding brick joints are made of refractory castable and silicon nitride filler. A development trend of refractory materials for furnace walls is the use of castables. A high-density castable of Al₂O₃50% and SiO₂ 45% is used in the No. 2 blast furnace of the Fukuyama Plant of Japan Steel Pipe Company. After 6 years of use, very little peeling was found.
At present, the unshaped refractories used for blast furnace tapping trenches at home and abroad are mainly Al₂-O₃-SiC-C (ASC for short), in addition to mullite-SiC-C, Al₂O₃-C, magnesium-aluminum spinel type of stone. Corundum-SiC castables are mainly used in my country. Most of the blast furnace taps in Japan now use ASC castables and repair gunning materials, and some small blast furnace taps use bauxite or synthetic mullite-SiC-C ramming materials. ASC ramming material is generally used in the blast furnace tap ditch in Germany and France. France has developed self-flowing castables, which have improved the working life of the working lining of the main tap ditch.

Unshaped Refractory Material on Ladle
The increase of the tapping temperature and the prolongation of the residence time of the molten steel in the ladle have caused great changes in the refractory materials for the ladle. The ladle used to be dominated by shaped refractories, but is now replaced by unshaped refractories. The unshaped ladle can not only save labor, but also realize the automatic construction and drying of the factory, and improve the overall economy. When the side wall of the ladle is indeterminate, the maintenance operation time can be saved by 40%, and when the lining of the ladle is all indeterminate, the labor-saving effect is 70%. Because Al₂O₃-spinel castable has the advantages of good corrosion resistance, small structural spalling, long service life and improved steel quality, it has become the main role of the current ladle refractory material. However, its use is limited by the temperature and the residence time of molten steel. The Al₂O₃-MgO castable developed by Kawasa-ki Company in Japan has improved material strength and slag penetration resistance, and its life is 20 times higher than that of Al₂O₃-spinel castable. %. At present, magnesia refractory castables and aluminum-magnesium carbon refractory castables have been tried on ladle, and initial results have been achieved.

Amorphous Refractories in Non-Ferrous Metallurgy
Aluminium smelting reverberatory furnace is a major consumer of refractory materials in aluminium plants. The refractory materials for the hearth have changed from brickwork to a monolithic structure. The refractory materials in contact with the metal on the hot side of the hearth are usually acid-bonded plastic, phosphate-bonded bricks and low-cement castables, and the hot side of the lower side wall is refractory. The material composition is usually the same as that of the hearth, and the thermal insulation material can be made of lightweight thermal insulation castables, thermal insulation clay bricks or ceramic fibers, etc.; The furnace top materials are usually high-quality refractory materials such as ramming materials and sintering materials; the furnace door is usually made of dense Castables or lightweight castables, or a mixture of the two can also be used for casting.

Refractory Material Selection for Specific Furnace Types

Blast Furnaces
Due to the high temperatures and severe operating conditions in blast furnaces, materials with high thermal shock resistance and resistance to chemical attack are required. High alumina, magnesite-chrome, and carbon-based refractories are commonly used in blast furnace linings.
The hearth and taphole areas of the blast furnace, which are subjected to intense thermal and mechanical stresses, often use special refractory materials like alumina-carbon or magnesia-carbon bricks.

Glass Melting Furnaces
Glass melting furnaces operate at extremely high temperatures and are exposed to corrosive molten glass. Therefore, silica, high alumina, and zircon refractories are commonly used due to their high-temperature resistance and resistance to chemical attack.
Fusion-cast refractories, which have excellent resistance to glass corrosion, are often used in critical areas such as the melter throat and regenerator crown.

Cement Kilns
Cement kilns operate at high temperatures and are exposed to alkaline and abrasive conditions. Therefore, magnesia-spinel, high alumina, and basic refractories are commonly used in cement kiln linings.Different zones of the kiln, such as the preheating zone, calcining zone, and burning zone, may require different refractory materials based on the specific conditions in each zone.

Incinerators
Incinerators operate at high temperatures and are exposed to chemical attack from combustion by-products. Refractory materials with high-temperature resistance and excellent chemical resistance, such as high alumina, silica, and chrome-based refractories, are commonly used.

Reheating Furnaces
Reheating furnaces in the steel industry undergo cyclic thermal shocks and operate at high temperatures. Therefore, materials with good thermal shock resistance, such as high alumina, silica, and magnesia, are commonly used. Refractory coatings or monolithic materials like castables are often used in reheating furnace linings to provide enhanced performance and ease of installation.

How to Safely Handle and Store Refractory Products

Safe Handling Techniques
Follow these guidelines when working with refractory products
1.Lift and transport refractory products using proper lifting techniques and equipment to prevent distortion and injury.
2.Do not drag or drop refractory materials as this may damage or compromise their integrity.
3.To prevent accidents and injuries, use caution when moving heavy or large refractory items.
4.Be aware of sharp edges and protrusions on refractory products and handle with care to avoid cuts and scrapes.

Storage Precautions
Proper storage is critical to maintaining the quality and performance ofrefractory products. Consider the following points for safe storage
1.Store refractory products in a clean, dry, wellventilated area.Pay attention to the moisture .
2.Store refractory products away from direct sunlight, extreme temperatures, and sources of ignition.
3.Store different types of refractories separately to minimize the risk of contamination or unintentional mixing.
4.Follow the right recommendations regarding stacking height and weight limits to prevent damage to the product.
5.Clearly label and organize storage areas so that specific refractory products can be easily identified and accessed.

Regular Inspection and Maintenance
Regularly inspect the stored refractory products for signs of damage or deterioration. Cracks, chips, and other damage can affect performance and should be addressed promptly. Additionally, ensure that the storage area is kept clean and free of debris that could pose a potential hazard and compromise the integrity of the material. The safe handling and storage of refractory materials is critical to the longevity and effective performance of products in high-temperature environments. Proper handling and storage methods can help maintain consistent material performance and extend their service life.

Frequently Asked Questions

Q: What is the difference between shaped and unshaped refractory?

A: Special shapes are most often hand-molded and are expected to exhibit slight variations in properties. Unshaped Refractories: Unshaped refractories are without definite form and are only given shape upon application. It forms jointless lining and are better known as monolithic refractories.

Q: What is an example of shaped refractory?

A: - Shaped refractories such as fireclay, basic refractory bricks and silica brick. - Unshaped or Monolithic refractories - which are further classified by their application use, such as mortars, castings, gunnings, and rammings.

Q: What does castable refractory mean?

A: Castable refractory cements are used to build and repair kilns, furnaces, and other heat resistant structures. Refractory castables, as they are sometimes called, can be derived from a wide variety of raw materials and cast into any required shape and size.

Q: What is refractory and non refractory?

A: In general, refractory ore is one that is not amenable to gold extraction using cyanide. Refractory ore is undesirable because the methods needed to enable gold extraction are expensive. Non-refractory ore is where cyanide can be used to extract the gold. This is desirable as it means the process will be cheaper.

Q: What is shaped vs unshaped connection?

A: With a Shaped internet connection, priority is givin to services like email, internet browsing and FTP. Other internet protocols like file sharing and online gaming receive a lower priority, and will run slower at times when the network is busy. Unshaped internet access treats all protocols the same.

Q: Which refractory material is best?

A: Silica brick is a refractory material with a SiO2 content greater or equal to 93%. It is widely used in melting furnaces for iron and steel, as well as in the glass industry. It has high refractoriness and resistance to thermal shock and exhibits exceptional high-load-bearing capacity until it reaches its fusion point.

Q: What is the difference between refractory and non refractory ore?

A: Gold ores can be categorized into two types - Free milling and refractory. Free milling ores are those easy to process by simple gravity techniques or direct cyanidation. Refractory ores, on the other hand, are difficult to treat and require pre-cyanidation processes to liberate the gold.

Q: What is neutral refractory?

A: Classification of refractory materials
These are used in areas where slags and atmosphere are either acidic or basic and are chemically stable to both acids and bases. The main raw materials belong to, but are not confined to, the R2O3 group. Common examples of these materials are alumina (Al2O3), chromia (Cr2O3) and carbon.

Q: What are the examples of shaped refractories?

A: Examples of shaped refractories include bricks, tiles, and blocks. Monolithic refractories: These are refractories that are not formed into a specific shape and can be installed by pouring, gunning, or troweling in place. Examples of monolithic refractories include castables, plastics, and ramming mixes.

Q: Which two metals are refractory?

A: Refractory metals such as molybdenum and tungsten have long been noted for their brittleness. Indeed, it was this brittleness that made the development of drawn tungsten wire for lamp filaments so difficult.

Q: How many types of refractory are there?

A: The typical refractory materials include fireclay refractories, high alumina refractories, silica brick, Magnesite refractories, Chromite refractories, Zirconia refractories, Insulating materials and Monolithic refractory.

Q: What are the raw materials for refractory?

A: The main raw materials used to produce refractories are usually oxides of silicon, aluminum, magnesium, calcium, and zirconium. There are some non-oxide refractory materials, such as carbides, nitrides, borides, silicates, and graphite.

Q: How long does refractory last?

A: According to some studies, 18-year-old males have a refractory period of about 15 minutes, while those in their 70s take about 20 hours, with the average for all men being approximately half an hour. Although rarer, some males exhibit no refractory period or a refractory period lasting less than 10 seconds.

Q: What is difference between castable and refractory?

A: Refractory castable is a kind of unshaped refractory. It is made by mixing and mixing refractory aggregates, powders, binders and admixtures. The refractory castables are made of different aggregates and binders. The functions are also different.

As one of the leading unshaped refractory materials manufacturers and suppliers in China, we warmly welcome you to buy high-grade unshaped refractory materials in stock here from our factory. All customized products are with high quality and competitive price. For free sample, contact us now.

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