Refractory Suppliers, Refractory Company, Refractory

Refractory Suppliers

Refractory Suppliers, Refractory Company, Refractory


Yingkou Ruizhi Refractories Co., Ltd. is a China refractory materials manufacturers for high temperature melting furnaces. Ruizhi Refractories supply main products are: magnesia carbon brick, ramming mass, refractory brick, refractory castable, refractory nozzle, furnace lining material for converter, electric arc furnace, ladle, LF furnace, tundish, etc.

Ruizhi Refractories products have been exported to many countries, such as South Africa, Australia, Canada, Malaysia, Bangladesh, Iran, Saudi Arabia, Iraq, Pakistan, Philippines, Vietnam, Tajikistan, Indonesia.

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http://www.ruizhirefractory.com/
Email: sales@ruizhirefractory.com

Kiln refractory selection method

refractory material

1, kiln performance and thermal characteristics. Such as intermittent work of the furnace should use refractory brick china low heat capacity of the material.
2, the safe use of materials temperature, thermal conductivity system, high temperature strength, chemical stability.
3, the use of life.
4, investment costs and maintenance costs.
In general, heavy refractory materials are more focused on a certain technical performance indicators, such as high temperature stability, chemical stability, etc .; light insulation materials more pay attention to put into operation and comprehensive technical and economic indicators.
The selection of lightweight insulation materials, the general thermal conductivity is used insulation material (λ) furnace refractory suppliers and the cost per unit volume of insulation material (P) to determine the value of the product of "λΡ" the smaller the better. Thermal conductivity value is small, indicating insulation material insulation effect is good, low energy costs during operation. The low cost per unit volume of refractory China insulation material indicates that the investment cost is low and the investment economy is good. You can use the graph plotting diagram selection, abscissa for the working temperature, ordinate (λΡ) good plot, the material safe use of temperature interception of the curve of the material, select the technical and economic performance of the material.

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Insulation refractory materials for aluminum electrolytic furnace and tank construction furnace

refractory materials

Aluminum electrolysis furnace, tank construction furnace insulation refractory materials mainly include the following three:
(A) diatomite thermal insulation material
Diatomaceous earth is the algae organic matter after corruption, the formation of the crustal changes. The main component of diatomite is amorphous silicon dioxide is generally between 70% and 85%) and a small amount of clay impurities, the melting temperature in the range of 1000 ℃ to 1200 ℃. Diatomaceous earth is composed of fine stomatal organization, its porosity up to 85%, so it has good thermal insulation properties, is widely used as a thermal insulation material.
1, diatomite asbestos powder (chicken feather ash), diatomite asbestos powder is a powder insulation material, made of asbestos fibers and diatomaceous earth powder; which accounted for 85% of diatomite powder, fiber 2-5 mm Asbestos accounted for 14%, 5 ~ 20 mm of asbestos accounted for l%, it is used to masonry Insulating refractory brick wiping surface.
2, light diatom brick, light diatomite brick is made of diatomite and additives by molding, drying, at 850 ℃ a 900 ℃ firing. Diatomite refractory brick suppliers bulk density, porosity, heat resistance at 1280 ℃ above, therefore, light diatomite brick can only be used in the insulation below 900 ℃, can not directly contact the flame. In case of high temperature, it will produce shrinkage, or even melt.
(B) asbestos (insulation materials)
Asbestos is the only natural mineral fiber that can be loosened into elastic fibers. According to the different natural conditions at the time of creation, the asbestos and amphibole asbestos can be divided into two categories, the most widely used asbestos asbestos, also known as chrysotile, its chemical formula is 3MgO · 2SiO2 · 2H2O. Asbestos The board is made of 65% asbestos and 35% bonded material and is used primarily as a liner or insulation for equipment. Loss on asbestos board should not exceed 18%, longitudinal tensile strength should not be less than 1.4MPa. Asbestos board structure and thickness must be uniform, smooth surface, consistent cross-section, no scarring, pores and cracks. Asbestos board general specifications for the 1000 × 1000mm (thickness from 1.6 to 16mm), the weight of each 1mm thickness, weighing about 1.3kg / m2. The maximum temperature does not exceed 500 ℃.
(C) Calcium silicate insulation refractory products
Calcium silicate insulation refractory products is a calcium silicate hydrate as the main component of the insulation material. Industry is based on lime, silicic acid as raw material, autoclaved in the autoclave synthetic hydrated calcium silicate, and then appropriate to add asbestos and other fibrous materials, the pressure after the formation of the porous structure of the insulation products. calcium silicate insulation products provides the technical conditions of calcium silicate insulation products.

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Continuous use of functional refractories

tundish nozzle

With the development of continuous casting, the proportion of high-clean steel production increased, sliding water mouth with skateboard, long nozzle, the sink, the outlet, immersion nozzle and other flow control and blowing function of the need for a sharp increase in refractory materials. In contrast to the earlier use of imported refractory bricks and other imported bricks of different circumstances, continuous casting refractory materials are still dominated by domestic production of products.

Sliding with a skateboard, the main use of aluminum carbon, and later, due to improved material, the use of improved conditions, greatly improved the number of durable. Material, due to the addition of zirconia, peeling resistance greatly improved. According to the experimental and stress calculation, the shape of the skateboard is improved, which inhibits the generation and expansion of the crack. Due to the miniaturization of the skateboard and the re-use of the rear skateboard, the consumption of the refractory suppliers material is reduced, so that the iron making is propelled. On the other hand, the development of high-corrosive steel slabs such as Ca-treated steel and high-carbon steels has been developed. For example, an aluminum-magnesium carbon alkaline skateboard having both corrosion resistance and peeling resistance has been developed.

Long water tundish nozzle is the most recent 10 years to improve the maximum refractory material, recently, long water mouth life can reach 30 furnace or 40 furnace is not surprising. Preheating, insulation and residue cleaning and other aspects of the use of improvements, for the extension of life has a significant effect. Material, to take to strengthen the strength of the bowl material, inhibit the inner tube steel wear, to prevent external oxidation and to prevent peeling and other measures.

Immersion nozzle, its characteristics and the flow pattern within the mold and the relationship between the quality of slab larger, it is generally from the material and shape of the two aspects of development and improvement. Material development is representative of the nozzle inside the alumina difficult to adhere to the development of materials. Generally use ZrO2-CaO-C material, the recent widespread use of carbon-free lining. Shape of the development, there are ladder-type immersion nozzle, this nozzle can effectively prevent the bias current, reduce the nozzle inside the alumina adhesion. In addition, a scheme for the use of a swirling flow nozzle and a vortex flow nozzle with spherical protrusions is proposed, and a furnace test is underway.

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Email: sales@ruizhirefractory.com