Description of Tunnel Kilns
Luwei Tunnel Furnace Technologies offers Tunnel Kilns specifically designed for the elaboration and optimization of thin film photovoltaic absorbers, Our Tunnel Kilns technology is based on innovative and flexible software-controlled single-substrate RTP/evaporation processes dedicated to the atmospheric-pressure selenization, sulphurisation, crystallization, etc.
The Tunnel Kilns maintains and equalizes the temperature of the slabs arriving from the caster and delivers them to the rolling mill. The Tunnel furnace provides a buffer of up to six hot slabs, available for rolling when the mill is ready, and The Tunnel Kilns are roughly 675-foot long, divided into 11 zones. Natural gas burners maintain a temperature of 1800° F - 2100° F in the fired zones. A door at the rolling mill exit end of the furnace prevents heat losses, opening when it is time to roll a slab.
Features of Tunnel Kilns
Tunnel Furnace steel bar heat treatment systems have fully integrated hardening, quenching and tempering for high volume and continuous production up to 9 metric tons/hr (20,000 lbs/hr).
Brown fused Alumina is mainly used as a recyclable abrasive in blast cabinets and blast rooms. Because of Brown fused Alumina low iron content, alumina is often used in blasting operations where iron contamination on the non-ferrous metal substrate is not allowed.
Aluminium oxide is a very hard and sharp abrasive that cleans rapidly. It leaves an anchor profile prior to coating and is suitable for removal of scale, rust and old coatings. Furthermore it is used for ceramic grinding wheels, refractory applications and polishing and grinding.
Brown fused alumina is produced from bauxite, charcoal, iron chip by being fused under high temperature in an electric arc furnace. It is characterized by high toughness and has a micro hardness of 2000-2200kg/mm2. The Abrasive tools made by brown fused alumina are suitable for grinding carbon steel, normal alloy steel, malleable cast iron and hard bronze, etc. Brown fused alumina can also be used for making fine quality refractory etc.
Brown Fused Alumina is a tough, sharp abrasives which is highly suitable for grinding metals of high tensile strength. Brown fused Alumina thermal properties make it an excellent material for use in the manufacture of refractory products. This material is also used in other applications like blasting and surface hardening.
Description of Shuttle Kilns
If you need to heat process ceramics, metals or glass in various ways and require flexible production schedules, or different cycles to different temperatures, then a Carbottom/Shuttle Kiln may be the best choice for your application. Luwei furnace’s Shuttle Kilns define batch firing for the ceramic industry. The kilns come in a wide range of capacities and with a choice of door, combustion system, and control designs.
A Shuttle Kiln is a car-bottom kiln with a door on one or both ends. Burners are positioned top and bottom on each side, creating a turbulent circular air flow. This type of kiln is generally a multi-car design and is used for processing whitewares, technical ceramics, and refractories in batches. A Shuttle Kiln derives its name from the fact that kiln cars can enter a shuttle kiln from either end of the kiln for processing, whereas a tunnel kiln has flow in only one direction.
Features of Shuttle Kilns
Ceramic Electric Shuttle Kiln with trolley is also called as shuttle furnacecar bottom furnace and pottery kiln in china. Welded by steel and profiled steel and chamber is high purity ceramic fiber plates and high quality electric resistance wire.
Pink Fused Aluminum Oxide contains chromium oxide, which gives the material its pink color. The incorporation of the Cr2O3 into the Al2O3 crystal lattice produces a slight increase in toughness and a reduced friability compared with White Fused Alumina.
Pink Fused Alumina is produced by doping Chromia into Alumina, which gives the material pink color. The incorporation of the Cr2O3 into the AI2O3 crystal lattice produces a slight increase in toughness and a reduced friability compared with white Fused Alumina.
Description of Pink Fused Aluminum Abrasives
Pink Fused Alumina and Ruby Fused Alumina is produced by adding chromium oxide to high purity aluminum oxide during the fusion process. The amount of chromium oxide added affects the color of the final product, as well as the toughness of the grain. With increased additions of chromium oxide, the toughness of the grain increases. Compared to Brown Regular Aluminum Oxide the Pink material is harder, more aggressive and has better cutting ability. The grain shape of Pink Aluminum Oxide is sharp and angular.
Pink Fused Alumina is White Fused Alumina with chrome oxide (under 0.5% Cr2O3) has been added in the fusion process to produce a grain that is slightly tougher than regular white fused alumina used for grinding unhardened high alloy steels. If more chrome oxide (about 3% Cr2O3) has been added to, it will get Ruby Fused Alumina, which provides additional toughness over pink fused alumina.
The raw material and refining work of pink aluminum oxide are basically the same as white aluminum oxide. They are both needed to add Cr203 and well mixed to be refined as abrasives with rose red color. Its hardness is close to white corundum, and the roughness is higher than white aluminum oxide. It is suitable for grinding knifes, measuring tools, meters, screw etc. that require low roughness.
Description of Continuous Mesh Belt Furnace
Luwei Furnace supplies the Continuous Mesh Belt Furnace is mainly used in the production of ceramic tiles table dishware bone teaset pottery bowls ceramic gifts and other ceramic building materials. Continuous Mesh Belt Furnaces are capable of achieving numerous metallurgical processes, including bright annealing, brazing, process curing, sintering, stress relieving, and tempering.
Luwei Furnace is the industry leader for the supply of Continuous Mesh Belt Furnace Systems. Continuous Mesh Belt Furnace can be attributed to continuous design innovation which changed the industry and continues today.
Features of Continuous Mesh Belt Furnace
The Continuous Mesh Belt Furnace directly heating by the electric heating tube with internal hot air mixing. Heating tunnel include the furnace bodyelectric heating tubehot air mixing motorconveying systerm and the electrical control systerm. The top have the airoutlet port through the valve to adjust exhaust gas out. The heating tube at both side of the belt up and down which can ensure the fast heating and good heating effect.
Controlling new production capacity, encouraging equal or reduced replacement, relying on existing refractory material production enterprises, carrying out technological transformation through joint reorganization, advancing energy conservation and emission reduction, and producing and promoting monolithic refractories, optimizing industrial structure, and increasing production concentration. degree. World heritage sites, scenic spots, ecological protection zones, drinking water source protection zones and other areas that need special protection and non-industrial construction planning zones may not be built or expanded.Fused Cast AZS Bricks
The raw material storage yard is equipped with walls and roofs, broken (powder) crushed, sieved, homogenized, transported, formed and processed into dust-prone processes, and dust collection devices are provided to prevent fugitive emissions of dust. Dust-laden gas is discharged after reaching the standard.
Supporting the construction of kiln flue gas dust removal, desulfurization, denitrification and other treatment devices. The reuse rate of the production process wastewater shall not be less than 90%, and the sewage shall be discharged after the treatment reaches the standard. Adopt cleaner production technologies and carry out cleaner production audits in accordance with the law. Establish an environmental management system and formulate emergency plans for emergency environmental incidents.
In respect of energy saving, consumption reduction and comprehensive utilization, the “Code” requires that the solid wastes such as crushing, fines, and dust recovered from the production process be recycled and reused, and the use of recycled refractories be encouraged. Refractory material enterprises that consume 5,000 tons of standard coal and above should submit their own energy utilization status report regularly to provide reliable energy consumption data according to the requirements of the local industrial energy conservation management department.
White Fused Alumina Abrasives is classified to exacting standards for various applications where higher purity levels and reduced iron content are required.
White Fused Alumina is produced by fusing calcined alumina. It is white in colour, a dense mineral and has predominantly large crystals of Alpha Alumina.
White Fused Alumina belongs to the group of electro-corundum. It is produced by controlled melting of alumina in an electric arc furnace. White fused alumina is iron-free, ultra pure and extremely hard.
Description of White Fused Aluminum Abrasives
White fused alumina is fused by alumina powder by electric arc furnace under high temperature. It has white color and little higher hardness and lower toughness comparing with brown fused alumina. The micro hardness of the product is 2200-2300kg/mm2. White fused alumina has higher hardness and slight lower toughness comparing with brown fused alumina. White fused alumina is also characterized by its high purity, acid and alkali resistance, good thermal stability. It’s the high grade refractory materials.
Applications of White Fused Aluminum Abrasives
Dedicated lines produce products for different applications. White Fused Alumina is highly friable and hence used in Vitrified Bonded Abrasives products where cool, fast cutting action is essential and also in the manufacture of high purity Alumina refractories. Other applications include use in Coated Abrasives, Surface treatment, Ceramic Tiles, Anti-Skid Paints, Fluidized Bed Furnaces and Skin / Dental Care.
Description of Mesh Belt Furnace
Luwei Furnace supplies the Mesh Belt Furnace is mainly used in the production of ceramic tiles table dishware bone teaset pottery bowls ceramic gifts and other ceramic building materials. The Mesh Belt Furnace is continuous heating and work it is made by the rotation of the ceramic tube as the roller kiln vehicle the ceramic tiles or bricks materials in the kiln inner chamber.
The rotation of the ceramic tube with high temperature (high-alumina) or SiC depending on the calcination temperature and ar driven by independent controller. Products are conveyed through preheatingcalcinating and cooling zones on rotating rollers and are placed on selters according to the shape and dimensions. And are heated uniformly by the upper and lower heaters (electric resistance wiressilicon carbide(SIC) or silicon molybdenum rods(MoSi2).
Features of Mesh Belt Furnace The Mesh Belt Furnace directly heating by the electric heating tube with internal hot air mixing. Heating tunnel include the furnace bodyelectric heating tubehot air mixing motorconveying systerm and the electrical control systerm. The top have the airoutlet port through the valve to adjust exhaust gas out. The heating tube at both side of the belt up and down which can ensure the fast heating and good heating effect.
Description of Roller Hearth Furnace
Roller Hearth Furnace continuous heating and work, Products are conveyed through preheating,calcinating and cooling zones on rotating rollers and are placed on selters according to the shape and dimensions.Products are heated uniformly by the upper and lower heaters(electric resistance wires,silicon carbide(SIC) or silicon molybdenum rods(MoSi2) ).
Roller Hearth Furnace in industrial furnace for ceramic tiles with 1400°C is mainly used for pre-burnceramicschemical productssinteirngthe calcined powders and other industries Equipment with low faulure ratehigh degree of automationlow power consumptioneasy operation and maintenance and so on.
Features of Roller Hearth Furnace
Roller Hearth Furnaces are designed to heat treat a wide variety of products economically with uniform, repeatable results. There’s a wide range of sizes of electric or fuel-fired heating systems with matched cooling sections and material handling systems.
Roller Hearth Furnace The Roller Hearth Furnace is a continuous or batch furnace concept that allows processing of small product in trays and baskets or larger product directly on the furnace hearth. Roller Hearth Furnaces can be provided in electric, direct fired and indirect gas fired configurations to meet specific processing requirements.
At present, combined with Mg-Cr2O3 brick, direct combination with Mg-Cr2O3 brick is the main material of firing furnace of AOD furnace and large-scale cement kiln in China. This brick has a load softening temperature, high temperature strength, high temperature stability and good volume characteristics.
However, the use of Mg-Cr2O3 bricks as AOD furnace linings and large cement kilns can lead to environmental pollution; non-continuous erosion and anti-spalling properties are not ideal; chromium in Mg-Cr2O3 bricks will be absorbed by the molten steel, resulting in Chromium content of chromium in molten steel is difficult to control; at the same time, domestic chromite resources are relatively scarce, with low grade, high content of harmful impurities SiO2, and high price.
Europe, Japan and other countries out of resources and environmental considerations, almost all AOD furnaces are made of magnesium dolomite refractory lining material. In the future, refractory materials that pollute the environment will no longer be produced and import restrictions will be imposed.
With China's accession to the WTO, the quality of national environmental protection and environmental requirements will certainly be higher and higher. Taking into account the limited resources and long-term development needs, environmentally friendly products will surely become the mainstream of the future.