#refractory castable

Explain the Uses and Benefits of Castable Refractory Cement

1.Refractory castable based on Application

Generally, the refractory material is engineered to perfection. But, it might not suit your refractory lining. Focus on the type of application of your refractory insulation. Choose suitable refractory products.

2. Choose Common Refractory Materials

Basically, everyone wants fast and cheap options, no matter the industry.

However, choosing cheap refractories ceramics will cost more in the future. So, consider buying the tried and tested refractory material regardless of price.Because refractory contractors know they are best for boiler refractory and furnaces.

3. Research Refractory Lining Trends

Although there is new refractory insulation technology, discuss with your refractory contractor first.This is because trends may seem too good to be true. Avoid asking for new types of furnace bricks for your refractory contractor to use.The engineering contractor will suggest a material that suits your refractory insulation.

4. Choose the Right Refractory Contractor

Basically, everyone thinks they are the best. But, in the end, the most experienced engineer will make the correct decision. Therefore, choose a refractoryfactory that fits your criteria. Then, they will provide refractory products and services that suit your refractory lining.

Different Refractory Castable

Things To Remember When Using Castable

Castables must always be stored in a cool and dry area.

One must ensure that the mixers and tools are free from old castable or any other material that can contaminate the product. Such contamination could affect the strength of the castable mix.

Only drinking suitable water should be used to mix castable. The temperature of the mix should be optimal as well.

Be careful while mixing castable, like castable refractory cement. Too much mixing generates heat and speeds up the setting time.

The forms should be covered with oil or grease to prevent moisture loss.

After placing the mix, the castable needs to be cured for 18 to 24 hours straight. Cover it with polyethylene sheets and spray it with cold water periodically. It will maintain the moisture of the mix and promote uniform curing at the applied area.

Silica Ramming Mass

Advantages Of Castable Refractories

Saves Time

Ease in usage

Significantly Better Structure Performance

Choosing refractory castable for the insulation process is one of the most thoughtful decisions. Their advantages and wide application seal the deal.  But what is even more important is finding a reliable refractory material supplier.  Welcome to contact us anytime.

Ladle Gunning Mix, gunning massIntroductionAccording to the gunning characteristics of gunning mixes and considering the destructibility of slag lines and easily worn parts of ladles, our company specially developed HT series of gunning mixes …… Source:https://www.yilongrefractory.com/ProductServletOne?id1=2&id=26E-mail：[email protected]

In recent years, the proportion of unshaped refractories in the whole refractory has been increasing, among which the largest increase is castables. The increase in the use of castables is mainly due to the development of low-cement and ultra-low-cement combined castable technologies.

A low-cement refractory castable with aluminate cement as a binder is usually used. Among the aluminate cement-bonded refractory castable, a considerable number of products are prone to some damage on the surface of the green body during the maintenance process after construction. Phenomenon, ranging from surface pulverization and spalling, in severe cases, it directly causes the green body to lose its bonding strength and pulverize and collapse.

Especially for large castable prefabricated blocks, it is a big loss. For example, the surface pulverization of blast furnace iron trench and slag trench prefabricated blocks is particularly serious. Therefore, in response to this phenomenon, after analyzing the damage mechanism, formulate the practical methods and countermeasures to avoid or reduce the surface damage of the castable are presented.

The solution to the surface damage of the castable

According to the existing analysis of the causes of damage to the surface of the castable, corresponding measures are taken to prevent or reduce the degree of surface damage.

1. Using high-purity raw materials

High-purity, high-density raw materials can reduce the content of soluble alkali metals. For example, refractory bauxite aggregates should be calcined in rotary kilns as far as possible, with few impurities and high bulk density, or dense corundum as aggregates. The refractory raw material is strictly controlled on the impurity content, and the addition amount is controlled as little as possible.

2. Reasonable selection of types of admixtures

Traditional castable admixtures usually use lignin calcium salt and sodium salt, which increases the alkali metal content of the castable and accelerates the reaction of hydration and decomposition. After adjustment, a new type of composite water reducing agent was tested to reduce calcium salts the addition of the admixture was strictly controlled, and the experiment was carried out in the production after the laboratory verification. The type of admixture was changed, and the optimal addition amount was achieved. The phenomenon of surface powdering of the green body was improved. 5 days extended to about a week, while the strength of the green body has also improved. The effects of different additives on the properties of castables. In this way, combined with the control of drying time, drying as early as possible to enhance the early strength, and now the surface powder of the green body has rarely occurred.

3. Control of construction water

The control of construction water quality is strengthened, and water is deposited in a large container before production as much as possible to avoid water turbidity and impurities, so as to reduce the entry of other additives that can increase the speed of cement hydration.

4. Control of construction environment

Enhance early strength in order to reduce and reduce the contact degree between the surface of the castable and the air, the method of surface covering is adopted to close the surface pores, and try to isolate the diffusion of carbon dioxide and water vapor into the castable body, thereby preventing the damage reaction. At the same time, in order to dry the green body as soon as possible, the thermal insulation of the workshop is strengthened, and if necessary, the green body is put into a low-temperature kiln to be dried and then demolded, so that the green body can be hardened within the optimal curing period of 36h to ensure the strength of the casting body.?

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality EAF magnesia-carbon brick are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:Solutions to surface damage of low cement refractory castables Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:[email protected] Website:https://www.cxrefractories.com

Ladle magnesia refractory castable mixing notes:

1. Stirring with a forced mixer. When mixing, do not mix into the bag, rope head and other debris, affecting the pouring effect and performance. 2. Mixing depends on the on-site unpacking of the castable. The amount of mixing depends on the capacity of the mixer. The castable should be accurately metered and poured into the mixer. 3. The process of dry mixing and dry mixing is adopted. After the casting material is added to the mixer, dry mixing for 2 minutes, adding water about 5.2~5.5%, adding water while stirring, first adding 80% of the total amount, and then depending on the consistency of the stirring material, as appropriate add (and note that the mixing water must be clean tap water, not sewage), wet mix for 4 minutes, and stir for at least 6 minutes, until the castable is uniform. 4. When mixing, strictly control the water consumption and mixing time to ensure the consistency required for the construction. If the castable is too thin, it will seriously affect the quality of the material. 5. The evenly mixed material should be poured in 20 minutes, so as not to be difficult to cast for a long time, affecting the strength of the ladle lining structure. 6. The mixer should be cleaned every time the construction is completed or the type of castable material is changed.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality tundish dry vibration mix are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:Ladle magnesia refractory castable mixing notes Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:[email protected] Website:https://www.cxrefractories.com

Ladle CastablesIntroductionBased on low-cement castable and superfine powder technologies, our company developed the series of castables for ladles to meet the operation conditions of various ladles. The castables are made by setting up scientific optimization of ingredients and accurate distributing of grain size as well as adding of high-quality binding agents and high-efficiency external…

Importance of Refractory Materials in Factories

Derived from the Latin word refractory’s, meaning stubborn, refractory is a technologically advanced heat-resistant ceramic material that can resist thermal and mechanical abuse and chemical corrosion at extremely high temperatures. Importance of Refractory Materials in Factories: Refractory materials have a great influence on the cost and quality of steel products. In recent years, the…