important characteristics of refractory materials

The coil grout has coil inter-turn that can be used for insulation. ※It can be used as the new coil size layer for the coating or the coil size layer for repair.

We have noticed that several characteristics of refractory: 

1. refractory material usually belong to the heterogeneous, different linear expansion coefficient between the phases is often different, it can cause stress and cause micro-cracks. At the same time, refractory (brick) from the firing temperature cools for stress but also alumina brick a source of micro-cracks. In addition, during formation of stress can cause high stress and micro-cracks on the surface, but do not lead to the final break.
2. refractories usually ingredients firebrick refractory multistage, coarse granule, granule and powder in a broad size range, thus there are many pore, pore tends to become the starting point of fracture.
3. refractory materials at the time of refractory brick for sale manufacture due to forming the remaining pore and cause micro-cracks cannot be cleared during firing and use.
4. refractory materials used in the process thermal stress due to thermal shock and mechanical stress will significantly exceed their mechanical strength.

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

high aluminum bricks and unshaped refractory materials

Mainly composed of special level bauxite chamotte as starting material and assisted with special additives, the brick are processed by moulding under high pressure and sintering under high temperature, with features like large heat accumulating capacity and small creep rate. They are avail able for blast hot stove matched of middle and small blast furnace.

High aluminum brick construction technology and equipment, coupled with gravity, innovation pumping and injection casting material, more simple, more reliable construction technology has slide gate fire clay provided favorable conditions. In order to realize the full automation of the construction process control computer and construction process, to promote "the research and development of gradient or multilayer castable". "Gradient castables" refers to the uncertainty from the hot side Ladle Permeable Brick to cold is lining castables gradually by the change of structure and thermal properties of matrix components, consisting of several layers. This will more adapt to the lining of actual conditions of use, may go to better use of results.

The unshaped refractory materials in monoblock stopper Chinese accounted for only about 15%, is expected in recent years can be increased to 30%-40%. should be committed to the development of a better high temperature properties of AL2O3 based and MgO based no cement castable. Selective binding system more suitable; the introduction of non oxide; from the angle of economy and technology feasibility study into the nano powder on the quality of unshaped refractory materials.

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

China Mullite brick with good thermal insulation

Composed of compound mullite, the bricks are processed through moulding under high pressure and sintering at high temperature, with Features of strong strength, steady bulk at high temperature and small creep rate, which are available for hot blast stove of large and middle size.

Preparation of Zircon mullite brick with high porosity porous materials, light weight, low thermal conductivity, high permeability, the advantages of non-brittle, with a wide range of applications, chemical industry, metallurgy, environmental protection and other fields of application will be of great social and economic importance.

Mullite brick with high ladle refractory temperature resistance, high strength and high thermal conductivity coefficient, energy saving features such as stove suitable for petroleum cracking furnaces, metallurgy, ceramics roller kiln, tunnel kiln, drawer kiln, glass electric porcelain Crucible Furnace and furnace linings, direct contact with the flame, the technical supervision departments concerned testing and use of products meet specifications of similar foreign products.


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

High purity corundum bricks corrosion resistance performance

The products are produced by corundum and chromium oxide as main materials, formed from casting, after being treated under high temperature, it has high hot strength and good wear resistance, suitable for making the slide rail part of heating furnace.

Plate-corundum has been widely used in refractory brick for sale the production of high performance refractories for steelmaking, has long used in non-steel industry, such as gasification furnaces and other industrial furnaces and other high-purity fused corundum brick raw material used by mainly white fused corundum. Often seen as white fused corundum high bulk density can increase the density of products and its corrosion resistance performance is good, you can improve the performance of products.

White fused alumina corundum is the preparation of high purity corundum brick slab are two main raw material impurities (such as SiO2) content is low, the volume density is high, thermodynamic properties, and alumina brick can resist gasification furnaces and other industry furnaces running caused by thermal, chemical structures. White fused alumina and fused alumina production process is different, is different, properties of corundum brick and their usage has some differences.

Due to its excellent firebrick refractory corrosion resistance, abrasion resistance and high temperature strength, refractoriness, creep, thermal and mechanical properties, is widely used as a residual oil Gasifier, gas furnace, carbon black, pulp waste gasification reaction furnace lining of furnaces and other industry furnaces.

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

Different Kind Of Casting Method For Fused Cast Series Block

Made from high-purity, high-density, high-strength materials and MAS matrix-optimized system, shaped by pressing, prefabrication and vibration. With subtle formula design, unique technical process, they have, which identified up to the leading domestic level and received recognition and praise.

Refractoriness of refractory brick refers to the property that refractory’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 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 refractory brick for sale 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.

refractory company 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;

Refractoriness of refractory brick

Mainly composed of special level bauxite chamotte as starting material and assisted with special additives, the brick are processed by moulding under high pressure and sintering under high temperature, with features like large heat accumulating capacity and small creep rate. They are avail able for blast hot stove matched of middle and small blast furnace.

Fused cast high zirconia block is an important nozzle refractory in glass industrial, it can be used in a wide range of glass furnace, especially high quality and special glass furnace such as TVglass, Borosilicate glass, Alumina silicate glass, Halogen lighting glass, Opal glass and Fiber galss, and it mainly used for glass sidewall, throat, dry vibration mix electrodes brick and the weir block, etc.

Refractoriness is different from melting point, melting point is the balance temperature that materials reach to melting point which is between solid and liquid crystal, however, refractoriness is a process in which the solid phase of the material is gradually dissolved in the liquid phase and finally is melted with the increasing temperature.

The chemical and mineral composition, distribution and combination of each phase have a decisive influence on refractoriness of zirconium sizing nozzle refractory, such as fused cast azs block, fused cast alumina block, fused cast high zirconia block. All kinds of impurities can seriously reduce the refractoriness, so it is pretty important to improve the purity of raw material and strictly control the content of impurity.

However, in actual application, besides the high temperature, refractory is also corrosive by other impurity, working environment is quite complicated, so refractoriness is used as a reference, and can not be more accurate data.

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;

various of performance analysis of Alumina bricks

Mainly composed of special level bauxite chamotte as starting material and assisted with special additives, the brick are processed by moulding under high pressure and sintering under high temperature, with features like large heat accumulating capacity and small creep rate. They are avail able for blast hot stove matched of middle and small blast furnace.

Introduction to the making craft of high alumina brick

Alumina bricks can be divided refractory fiber felt 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 zirconium sizing nozzle 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 ladle gunning mix 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

refractory 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;