refractory material: What's the advantages about Refractory fireclay br...

refractory material: What's the advantages about Refractory fireclay br...: Composed of mullite and sillimanite, the bricks are processed by sintering under high temperature, with features of strong strength, abras...

What's the advantages about Refractory fireclay brick materials

Composed of mullite and sillimanite, the bricks are processed by sintering under high temperature, with features of strong strength, abrasion residence, low Fe2O3 content and strong carbon deposition resistance, available for middle and upper parts off furnace stack.

Refractory Clay brick as the main raw material, mud treatment, molding, drying and roasting. Minerals mainly kaolinite clay (Al2O3 · 2SiO2 · 2H2O), and 6% to 7% of the impurities (potassium, sodium, calcium, titanium, iron oxides). Clay brick firing process, mainly kaolinite dehydration decomposition process continue to generate mullite (3Al2O3 · 2SiO2) crystals. SiO2 and Al2O3 in the fireclay brick in the firing process with a low melting point eutectic forming impurity silicates surrounds mullite crystals.

Bricks from local materials, cheap, durable, as well as fire protection, thermal insulation, sound insulation, moisture absorption, etc., for use in a wide range of civil construction projects.refractories Scrap bricks can be made of concrete aggregate. To improve ordinary brick block small, self-important, the consumption of soil many shortcomings, forward lightweight, high strength, hollow, chunks of direction.

Clay brick production of raw materials

Clay is the oldest and most widely used China refractory material refractory brick manufacturing raw materials are clay minerals, natural refractory clays can be divided into hard clay and soft clay.
Manufacturing clay refractory brick for sale is clay mineral raw materials. Natural fire clay can be divided into hard clay and soft clay. In refractory manufacturing process, the former majority clinker used after calcination; latter adding water, plastic, easy sintering, and more as the binding agent. China Shandong and other places flint (hard) and Suzhou clay (soft) are world-renowned high-quality refractory clay. Clay minerals are kaolinite (Al2O3 · 2SiO2 · 2H2O), dickite (same composition and kaolinite, but different in lattice constant), montmorillonite (Al2O3 · 4SiO2 · 6H2O), and mica.

refractory company Henan Xinmi Changxing Refractory Material Co., Ltd.'s product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc;

The market analysis of silica brick industry by Henan Xinmi Changxing

Mainly used for coke oven, hot blast stove, acid steelmaking furnace and glass melting furnace. The products can be manufactured according to customers' different requirements.

On the other hand, these industries in the fierce market competition to lower prices and China refractory material raised consumption, maintain and improve the life of the requirements,refractory brick for sale resulting in refractory enterprises not only to reduce raw material and production costs, but also to greater investment to accelerate development and application of new technologies and new products. Refractory species is closely around the requirements of the development of the user industry, long life, energy saving, environmental protection and multifunctional.

In recent years, the China refractory material industry is facing a serious oversupply situation, showing lower production, corporate restructuring, increased competition, innovation and research and development efforts to enhance services to enhance user awareness and capacity trends. On the one hand, the main user industries such as refractory technology and management advances in steel, cement, glass, nonferrous metals and other industrial refractories consumption leads to decrease, while the use of refractory performance refractories proposed new stringent requirements.

Like other industries, the refractory industry in recent years, the world has experienced significant structural changes mergers and acquisitions, and mergers and acquisitions swept the globe. Some of the weak competitiveness of small businesses on the verge of bankruptcy, the collapse of competitive enterprises are powerful combination, continue to grow, and some existing monopoly situation.

refractory company Henan Xinmi Changxing Refractory Material Co., Ltd.'s product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc;

various of performance analysis of Alumina bricks

Produced with unique advanced technology, the clay and high alumina heat insulating bricks possess the characteristics of high intensity for pressure and good thermal shock stability. The use of the bricks can reduce the heat capacity of kiln walls and promote the heat efficiency of kilns. The product is applicable for constructing industrial kilns and inner lining of kilns.

Introduction to the making craft of high alumina brick

Alumina bricks can be divided according to the different attributes are many ways to apply as a manufacturer for the appropriate distribution of our product quality and technology and other high alumina bricks, first alumina brick porosity What have porosity?
All percentage of the total volume of pore volume alumina brick station is porosity. Meanwhile alumina bricks have permeability, air permeability per unit time is the amount of gas by the size of the China refractory material refractory bricks.

Production technology of high alumina brick and clinker clay brick more similar, the difference is that the ingredients in the clinker ratio is higher, can be as high as 90 ~ 95%, before breaking the clinker grading sorting and screening in addition to iron, firing temperature is higher, such as Ⅰ, Ⅱhigh alumina refractory brick with tunnel kiln firing when the general is 1500 ~ 1600 ℃.

Chinese production practice has proved that high alumina clinker strictly choose grading, and hierarchical storage before crushing, bauxite clinker and clay together fine grinding method, to improve the quality of products.


Tips manufacturers, high alumina brick thermal expansion and contraction with temperature changes due to expansion and contraction of the reverse. Anti rapid thermal quench performance is alumina brick thermal shock resistance and chipping resistance. Alumina bricks in long-term use due to impurities affect tissue invasive exfoliation.China refractories material atmosphere and other factors. Therefore, high alumina brick refractoriness with stability.

Henan Xinmi Changxing Refractory Material Co., Ltd.'s product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc;

Process Flow For Casting Technology Of Fused Cast Bricks

This process is short but complicated, and each step is related to the quality of the final product. There are several kinds of casting methods to produce casting blocks, and different casting method leads to different performance of fused cast blocks,refractory company below are several casting methods which are commonly used in China.

The specific production flow of casting is as below:

1. Proportion the raw material
Pre-treat the raw material of oxidized aluminum powder, zircon sand and zirconium and other raw materials, proportion them with computer according to different type of fused cast bricks.

2. Melting in electronic furnace
According to the requirements of production plan, put the proportioned raw materials into a special electric arc furnace and melt under optimum conditions and moderate temperature, as low temperature is easy to lead to uneven fused cast bricks, forming a porous body and cracks, and increasing shrinkage accordingly.

3. Casting in the mold
Pouring the molten materials into the product mold which is specially designed. When using properly superheated melt casting, shrinkage hole of fused cast bricks are concentrated, thickness of the dense region increases and density of the whole product increases. However, if the degree of overheating is too high, although the melting density has increased, but it is easy to make fused cast Clay, High Alumina Insulating Bricks forming cracks and big shrinkage hole.

4. Cooling
Slowly cool down the casted fused cast Mullite Insulating Firebrick, make the crystal of fused cast bricks growing and forming the best structure. Generally, insulation box filled with diatomite is used to anneal the blocks with mold or resistance furnace which can adjust temperature is used to anneal. The initial temperature and heat insulation have obvious effect on annealing effect.

5. Surface machining
Examine the defects on surface, brick size, accuracy of every fused cast bricks then make high precision grinding according to customer’s requirement to ensure the accuracy of its size. Mechanical machining is the means to improve the quality of fused cast Magnesia Carbon Brick and prolong its service life.

Henan Xinmi Changxing Refractory material Co., Ltd. our product portfolio covers shaped products such as refractory brick,refractory castable, refractory nozzle, ceramic fiber, slide gate, etc;

Different Kind Of Casting Method For Fused Cast Series Block

Refractoriness of refractory brick refers to the property that refractory material’s multiphase reaches to a specific softening degree when at high temperature without any load, which shows the ability of resistance to high temperature. It is a basic scale to measure the ability of resistance to high temperature and basic technical index to show its high temperature property.

1. Normal casting: fused cast series block adopts normal riser casting and the riser is eliminated in hot state. The cut section is divided into two parts, the first part is solidified which crystallized dense, and this part accounts for 40%-50% thickness of casting; another part is then solidified which has shrinkage and coarse crystallization. The price of fused cast block produced in this way is relatively low, and it is mainly use in upper structure and sidewall of the tank of glass furnace.

2. Tilt casting: Tilt ladle refractory casting is that makes the mold in a special angle before casting and then casts the mold by putting the riser in one side. This can get a dense area in the T section and can be used to get higher accuracy in the T direction, so fused cast block produced in this way can be mainly used in side wall of glass furnace.

3. Void free casting: The shrinkage hole is concentrated in a certain area, and removes the shrinkage with diamond saw after cooling. The remaining useful part is homogeneous and dense, and the average bulk density is close to the theoretical density. Fused cast block manufactured in this method is mainly applied to bottom of tank, channel, electronic brick and other high request parts in glass furnace, and the price is also relatively high.

After melting and refining the mixed material of fused cast series blocks in the electric arc furnace which needs to reach the casting standard, then pouring the molten liquid into the casting mold by the electric furnace, the operation process is called casting.

Henan Xinmi Changxing Refractory material Co., Ltd. our product portfolio covers shaped products such as refractory brick for sale,refractory castable, refractory nozzle, ceramic fiber, slide gate, etc;

Glass Refractory In China

Casting speed directly determines the casting time, and every fused cast block has its own best casting time. Unreasonable casting time can cause many defects in the casting.

China's glass industry is developing rapidly, and has become the world's first glass production power. The rapid development of the glass industry naturally promotes the development and technological progress of China's glass furnace refractory material. Compared with the traditional process, modern glass production technology has a qualitative leap which towards the direction of higher efficiency, lower energy consumption and better product quality. Accordingly, the technical level of glass furnace which is as the core equipment of glass production is also in constant progress, for instance, widely adopt new technologies to improve the combustion intensity, strengthen heat transfer effect, reduce heat loss and educe the pollution of products and environment.

 In order to achieve the new furnace technology of high efficiency, energy saving and low pollution, it is very important to combine and use several kinds of high quality Changxing clay insulating bricks material in one glass furnace, for example, fused cast brick 33# is mainly used in relatively low temperature and corrosive parts of glass furnace such as working ends, feeder channel; fused cast brick 41# is especially applied to seriously corrosive parts of glass furnace such as throat, bottom budding, refractory brick, electric brick corners, doghouse and also can be used in sidewalls; Zircon brick is mainly used in the superstructure of flame space and tank bottom of glass furnace; fused cast alumina brick (α-β brick) is mainly used as the ideal Changxing Refractory material for feeder channel, spouts and working ends of glass furnaces.
China Xinmi Changxing Refractory material Co., Ltd. our product portfolio covers shaped products such as refractory brick,insulating castable, refractory nozzle, ceramic fiber, slide gate, etc;

Casting Speed Of Fused Cast Series Block

The technological progress of glass furnace requires a variety of high quality Changxing refractory brick as the guarantee condition which can withstand high temperature, resist to strong chemical corrosion and bear severe stress damage.

Low casting speed
If the first poured liquid flow has solidified into thin shells which will inward contraction, then poured liquid flows will get into the gaps between the thin shell and the refractories mold which form scar on the surface of fused cast series block. Meanwhile, if the liquid flows are too thin, before reaching the side corner the liquid flow will be solidify which will lead to Insufficient casting. In addition, low casting speed will also lead to long time casting which means that mold baking time will be increased, that the mold cover is easy peeling off into the molten liquid and cause sand inclusion.

High casting speed
If the Changxing refractory castable speed of fused cast series block is too fast, the liquid flows become wide which bring a great impact on the casting mold of fused cast series block, then part of casting mold is broken through or melted which can make this part of mold risen up. In addition, when the wide liquid flow is casted into mold, some air is may brought into casting mold and rising to the top cover of the mold rapidly. Meanwhile, liquid touched top cover has already formed thin shell, so when air rises to the top cover that so-called shell is formed. What is more, it is easy to form air bubbles inside the mold when air is brought in mold. Except for the air, wide liquid flows caused by high casting speed may also brings the raw material which is in furnace mouth into molten liquid of fused cast series block.

China Xinmi Changxing Refractory material Co., Ltd. our product portfolio covers shaped products such as refractory brick for sale,refractory castable, refractory nozzle, ceramic fiber, slide gate, etc;