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Ceramic fiber board is rigid, high temperature ceramic fiber board, the use of jet fiber as a ceramic fiber board raw materials, adding a certain proportion of binder, filler-level additives, after beater, in the pulp pool fully dispersed into a slurry. Pump into the molding tank and stir with compressed air. The mold into the molding pool, the use of the principle of vacuum, the fiber slurry adsorption on the mold, made of. Ceramic fiber board has: low thermal conductivity, high temperature stability, anti-air erosion, uniform density, excellent resistance to thermal shock and chemical erosion (phosphoric acid, hydrofluoric acid, concentrated alkali) and easy to install. Because of its adiabatic ability, it helps to reduce energy costs and cycle time, and can protect the furnace shell from thermal shock. Can be used directly as a refractory material. Due to process requirements, in the production process by adding a small amount of organic or inorganic adhesives. If the organic binder is added, the organic binder will burn out at a temperature between 285 ° C and 450 ° C when the end user is heated for the first time. After the organic binder burns, the color of the plate is white. Features: 1, high compressive strength, long service life; 2, low heat capacity, low thermal conductivity; 3, non-brittle material, good toughness; 4, the size of precision, good flatness; 5, easy to install, easy to install; 6, excellent anti-wind erosion performance; 7, continuous production, fiber distribution, performance and stability.
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[ چهارشنبه 4 اسفند 1395 ] [ 13:08 ] [ sunriserefractory ]
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First of all,
the most basic is the nature of silica brick belongs to the acidity.
The true density of silica brick is
smaller, the lime translation is more complete, in the process of the oven and
residual expansion is smaller. In silica brick, the true
density of the quartz crystal is smallest, linear expansion
rate is small, the thermal stability is better than cristobalite and
quartz, thermal conductivity is good, refractoriness under load is high, slag
corrosion resistance is strong, is the most stable form quartz in volume.
In better firing silica brick, the content of
scale quartz is the highest, accounted for 50% ~ 80%, cristobalite
times, only 10% ~ 30%, the content fluctuation of quartz and
glass phase is in 5% ~ 15%.
When working
temperature is below 600 ~ 700 ℃,
silica brick volume change is bigger, the resistance to thermal shock
performance is poorer, thermal stability is not good. If
coke oven is in long-term work under this kind of temperature, masonry is
easily broken.
The key to determine
whether thermal stability is good is true density, the size of true density is
to determine one of the important marks of the quartz translation.
Silica brick belongs to the acid refractory material, with good acid
erosion resistance, its thermal performance is good, refractoriness under load
is high, generally is above 1620 ℃,
the refractoriness is only lower 70 ~ 80 ℃ .
The thermal conductivity of silica brick increases with the rising of
temperature, no residual shrinkage, in the process of oven, the volume of a
silica brick increases as the temperature increases.
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[ پنجشنبه 23 دی 1395 ] [ 12:57 ] [ sunriserefractory ]
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The unshaped refractory material is composed of regenerated magnesia-chrome granule and powder, binder or other admixture, and can be used directly or added with appropriate liquid after blending. That is, the material is not a new type of refractory fire, the refractoriness of not less than 1580 ° C. A variety of unshaped refractory material, produced by the production methods and methods can be divided into concrete, castable, plastic, ramming material, gunning materials, projecting materials, coating materials, dry ramming material, fire clay material, Complement charge (asphalt combined with large surface charge, Martin sand, etc.) also belong to the list is not stereotypes. Although there are many names of unshaped products, the typical production methods of waste Mg-Al spinel tiles can be classified into the following three main forms: 1. "Concrete" powered by. Concrete technology thrown earlier, it is not stereotypes products in the stereotypes of products, some parts of the furnace, such as hot stove top furnace wall, rotary kiln before and after the mouth ring, cutting slope, unloading chamber wall And so on, all town to design large masonry (reheating furnace top block weight 3-4 tons) made of concrete. Concrete bovine production method is cast into the model of scrap magnesia chrome brick, vibration molding, after stripping heat treatment, to provide users in addition to block large, weight, the use of the machine and the brick is no essential difference. This production in the factory to complete the castable pouring water than the scene less than 10%, processing quality, and the quality of chaos. As the brick big, heavy, lifting lifting equipment to be on-site, as long as the site can be hoisting construction, should try to use concrete, can also be made smaller shape, a few people can carry on the line. Concrete does not require users to do special heat treatment, instrument this point is very meaningful. 2. Castable. Casting is a refractory plant to provide raw materials and ingredients program of scrap mafic bricks, on-site processing, with vibrating rods compacted, after curing to be heat treatment, because the premise is not limited by the quality of the site chaos, but the overall castability better than concrete, The quality of castables is critical to water consumption and heat treatment are not as good as the two aspects of concrete, raw material consumption than concrete 5% to 8%. 3. Can be plastic. From the production method that can be between the plastic and castables in the middle of concrete. It consists of refractory plant first "castable" made of plastic slime, ingredients in retarder, by the plastic bag, in the field of construction and heat treatment. Can be applied to the plastic in the biggest problem is easy to pick up the stubble at the peel off, the amount of retarder improper or bad plastic easy to harden the agglomeration of waste refractory brick.
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[ پنجشنبه 16 دی 1395 ] [ 13:08 ] [ sunriserefractory ]
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Corundum brick can be classified into the following categories: 1. Sintered corundum brick (1) Corundum brick made of sintered corundum clinker, commonly known as sintered refractory brick. (2) With light corundum powder particles and fine powder made of corundum products, also known as sintered alumina products. 2. Fused corundum brick (1) Cast aluminum oxide products: the alumina raw material mixture at higher than the melting temperature after melting, pouring in the prefabricated refractory model, after cooling and solidification is the crystal growth and development of the formation of products, known as cast refractory corundum. The melting method is generally used to melt. Alumina raw material mixture melting at higher than the melting temperature, the casting in the pre-cast fire model, after cooling and solidification of the crystal growth and development of the formation of products, known as cast refractory corundum. Generally fused by an electrofusion method. (2) Re-combined with fused corundum products: combined with corundum products to fused corundum clinker for the pellets, fused corundum fine powder or sintered corundum fine powder as the substrate, combined with the sintered products made of re-combination. Its production process points: fused corundum raw material processing. With fused corundum or white fused alumina as raw materials, the need to smash the frit after the election to remove the corundum block entrained silicon iron alloy or other impurities. White corundum block should be removed in addition to the crystalline form of sodium aluminate, and other low-melting, the impurity minerals due to the density of small, usually floating in the corundum frit surface, easier to identify. Corundum contains a small amount of harmful ingredients, sintering products will cause poor or cracking, it should be used in the pre-calcination. The ferrosilicon alloy is oxidized to Fe2O3 and SiO2 at 500-1000 deg, and oxidized to TiO2 (rutile), etc, all of which have a large volume expansion. After pre-calcination, these decomposition and oxidation reactions In the pre-burning process, to avoid burning in the products because of the reaction of these impurity minerals caused by expansion of product cracking.
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[ پنجشنبه 9 دی 1395 ] [ 11:07 ] [ sunriserefractory ]
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Sillimanite brick is made of sillimanite refractory brick. The general use of high-temperature combustion and mud casting production. 1. Non-ferrous metal smelting industry application The use of silicon carbon, high temperature, high strength, good thermal conductivity, impact resistance, high temperature indirect heating materials, such as strong ort furnace. Distillation furnace tower, aluminum cell, copper furnace lining, furnace arc zinc plate zinc powder, thermocouple protection tube 2. Iron and steel industry application The use of silicon carbide corrosion. Heat shock wear resistance. Good thermal conductivity, suitable for large blast furnace lining, improve service life. 3. Metallurgy and mineral processing industry application The abrasion resistance is 5 ~ 20 times of the service life of cast iron, rubber, is the aviation industry, the aviation industry, the aviation industry, the aviation industry, the aviation industry, Track the ideal material.
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[ پنجشنبه 2 دی 1395 ] [ 12:01 ] [ sunriserefractory ]
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Refractory material has many molding methods, in addition to compression molding, including vibration molding, compaction molding, plastic molding, slip casting molding, casting molding, hot pressing and hot die-casting molding. 1. Vibration molding Vibration molding is to use mud material under the action of vibration, dynamic friction instead of static friction, mud slurry and slurry material greatly reduce the friction between the mold wall, the sludge particles have good fluidity filled mold parts. At the same time, small particles can be filled into the gap of larger particles in order to achieve the purpose of density. 2. Compaction molding Compaction molding is the use of hammer compaction mud material, to obtain a certain shape and density of the molding method. Tamping machine is usually pneumatic or electric drive, can also be manually compacted. When playing, the sludge is added to the layered model, which in turn will be wrapped on each floor. Crushing method for semi-dry sludge production of different products. The method of labor intensity, noise is also large. 3. Plastic molding Plastic molding is a good plastic clay into the model or extrusion molding extrusion molding method. Plastic slurry containing high water content, the mass fraction is usually more than 15%. In the refractory industry, it is usually used in the manufacture of rough, more for mullite, bauxite clinker and other raw materials production.
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[ پنجشنبه 25 آذر 1395 ] [ 13:13 ] [ sunriserefractory ]
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Our company mainly produces refractory bricks, with advanced technology, strong technical force, detection equipment. Refractory brick production has five steps: Borrow the earth. Soil baked bricks are used from ancient earth beneath the surface of the Earth to take two feet deep. The soil color layer is slightly deeper than the overburden, which formed between 80,000 and 80,000 years ago. At that time, the Earth's warm and humid climate, rich biological role in this period of the formation of soil soft and sticky, is a good refractory brick material. 2. Excavate the clay and let the sunshine, snow and rain freeze and erode in the open-air accumulation process for about half a year to decompose and loosen its interior, and then hand-crush and sieve, leaving only fine pure soil . 3. Add water to the soil, wet it, and then repeatedly refining, or use cattle power trample to make it mud, the human mud and refining through the need for five to six times, the process plays a vital quality The role of brick. 4. The soil into the wood block mode, after compaction, scraping the excess sludge with a wire to form a blank. Blocking, the need to sprinkle a layer of fine sand in the wood floor, in case of mud and ground adhesion. 5. After stripping the bricks, you need to dry the sun visor in the sun, so as not to be exposed to the bricks, cracks and deformation.
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[ پنجشنبه 18 آذر 1395 ] [ 13:13 ] [ sunriserefractory ]
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Fire clay brick mainly comprises several steps:
1. Take the soil. Fire clay brick takes soil from the paleosol surface two feet deep, and the soil color layer is slightly deeper than the overburden, which formed eighty to ten thousand years ago. At that time, the Earth's warm and humid climate, rich biological role in this period of soil soft and sticky, is a good material to burn a good brick.
2. Excavated clay, after six months of open-air accumulation in the process, so that sunlight, snow and rain freezing erosion, the internal decomposition of loose, hand-broken, leaving only fine after screening pure soil.
3. Adding water to moist, pure water and refining it over and over again, or making the milk into a powder, making it mud, the human being refining through the mud to about five or six times, the process plays a vital role in quality Role of brick.
4. The soil is filled in a block pattern, compacted, and scraped off with excess sludge using wire bow and blank shape. Before sealing, sprinkle a layer of fine sand on the ground floor, soil and ground adhesion in the case.
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[ پنجشنبه 11 آذر 1395 ] [ 7:20 ] [ sunriserefractory ]
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The performance and
application of chrome corundum brick.
Fire resistance of the
products
Add Cr2O3 to
high purity corundum material, no matter how much the amount is, not only will
not reduce refractory performance of materials, on the contrary make
fireproof performance of materials improved. The refractoriness of chrome
corundum brick (> 1790!) and refractoriness under load (> 1700!) are
superior to high purity corundum products.
1. The
strength of the products
Room
temperature compressive strength of high purity corundum brick is 70 ~ 100
MPa commonly, room temperature compressive strength of high performance chrome
corundum brick is generally more than 150 MPa, the intensity is significantly
higher than the corundum brick. This is
because the products in the process of burning, between particles and
particles, particles and fine powder, powder and powder, formed Al2O3 -
Cr2O3 solid solution, the solid solution connects particles to fine powder
particles together, make the strength of the material is greatly increased.
2. Thermal shock
resistance
Add Cr2O3 to corundum, when Cr2O3 content is 10% ~ 66%. The raw materials that Chrome corundum series of products used
is made from alumina and chromium oxide according to certain proportion
matching, after high temperature melting synthesis of a solid solution. Using
special refractory materials production technology to produce refractory
brick, can improve and enhance internal quality of the products, improve the
high temperature performance of products, have the characteristics
of high refractoriness, big strength, good thermal shock stability, strong
ability to resist erosion.
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[ پنجشنبه 4 آذر 1395 ] [ 7:06 ] [ sunriserefractory ]
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The system
structures of ceramic
fiber board mainly have: bonding layer, thermal insulation layer, and facing
layer and accessories.
1.
Bonding layer for the building, is between the bottom and the surface, first
with gelled material will firmly bonding together with two layer, its main
filler source is inorganic.
2.
Insulation layer of the main fillers for the flint fiber and a certain amount
of organic matter, moisture, and adhesive, etc.
3.
Facing layer should chose facing mortar, ornament mortar and lightweight
functional coating or outstanding permeability of water-based exterior wall
coating, which makes ceramic fiber board to keep the characteristics of its
light weight, also increased its beautiful degree.
4.
Accessories mainly choose all kinds of paint, on the one hand, increase the color
on the surface of the ceramic fiber board, make it can be applied to any
environment and coating could be partly played its role to the flame retardant
and heat preservation.
Application
1.
The non-ferrous metal industry: heat insulation materials， used for casting
copper and copper alloy
2.
Petrochemical industry: hot surface material in high temperature furnace
3.
Glass industry: molten pool of heat insulation, burner blocks
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[ سه شنبه 2 آذر 1395 ] [ 11:24 ] [ sunriserefractory ]
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