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07 février 2018

Refractory materials used in optical glass manufacturing

In the optical glass melting, clay kaolin clay crucible and mixer (hereinafter referred to as clay crucible and mixer). Basically belong to AI203 ~ SiO2 binary aluminosilicate refractories, with different content of AI2O3 and SiO2 to decide its manufacturing process and performance.Fused Cast AZS Bricks



In recent years, due to the development of the optical glass industry, the optical glass of the new variety is continuously increasing, and the refractories of the optical glass are also developed correspondingly. In addition to the earlier use of clay, kaolin, bauxite and other natural raw materials to create refractory material. There are pure oxide refractory products. Such as fused silica products, fused corundum products and sintered mullite and other refractory materials. For some new varieties of optical glass melting also used tin dioxide ceramics, platinum, platinum alloys, carbon materials as smelting optical glass high temperature container, the development of new varieties of optical glass and increase the amount of optical glass have played a A certain role in promoting.

In the optical glass melting process, in order to use the crucible method and pool furnace melting method is more common. Crucible type more. Pool melting method with the main furnace using a variety of special shaped or special cast refractories. Although such materials have a complex manufacturing process but a wide variety and high resistance to glass erosion and high temperature mechanical strength, these materials provide the advantages of selective use for melting various glass varieties.


06 février 2018

The best Heat Treatment Furnace from Luwei Furnace.

Heat Treatment Furnace chamber is high purity alumina fiber insulation and Morgan materials brick, and save you money when treating large volumes of material per hour with exceptional uniformity and low maintenance. 

The lifting and dropping of the Heat Treatment Furnace cover adopt with electromotor to drive the lifter of worm wheel, worm, and screw mandrel to perform. The airproof of furnace cover and retort adopt appropriativesealing ring and impacted structure. There are the vent and explosion door on the Heat Treatment Furnace cover. 



Heat Treatment Furnace
Brand Name: Luwei
Model: Heat Treatment Furnace KSS-1600
Max.Temperature: 1600°C
Working Temperature: 1500°C
Furnace Chamber Size: 1200*1200*1200MM
Temperature Controller: 1200*1200*1200MM
Control Accuray: ± 1°C
Heating Element: MoSi2 heaters
Thermocouple: B type
Chamber Material: High purity Ceramic fiber


The Heat Treatment Furnace from Luoyang Luwei include many models like Pottery heat treatment sintering furnace, Trolley heat treatment Furnace, Car Bottom furnace, Car Bottom Hearth furnace and drop bottom loading furnace, etc. 

02 février 2018

Energy-saving environmentally friendly refractory materials industry

Development of energy-saving environmentally friendly refractory industry in line with the world trend. People need fresh air, clean water, clean food, people need a good living environment. This is the development of energy-saving environmentally friendly refractory industry has become the root cause of the world trend and the fundamental driving force. At the same time, it should be noted that the development of the energy-saving and environment-friendly refractories industry itself also requires the sustained investment of technical production factors. As a result, it not only promotes the self-development of energy-saving and environmental protection industries, but also greatly accelerates the technological progress of the entire country.



Energy-saving environmentally friendly refractory industry is very large market size, a long time, developed countries accounted for a major share of them. The world's major developed countries have always attached great importance to the development of energy-saving environmentally friendly refractory industry. Vigorously developing China's energy-saving and environmentally-friendly refractory industry is in line with the worldwide trend and plays an important role in optimizing the industrial structure and consumption structure.

As we all know, the German government and market in promoting the development of energy-saving environmentally friendly refractory industry is unique in that it spare no effort to strengthen the awareness of energy saving and environmental protection businesses and residents, where possible, the development of environmentally friendly products and manufacturing processes . These two points are particularly worth learning from China. Some Chinese enterprises and individuals are not aware of energy conservation and environmental protection. Governments at all levels should further increase the promotion of energy conservation and environmental protection so that the concept of energy conservation and environmental protection can truly reach people's hearts. As a result, consumer demand for energy saving and environmental protection refractory products will increase greatly. As a result, Is conducive to the expansion of the scale of production of energy-saving environmentally friendly refractory products and energy-saving environmental protection technology development, improvement and promotion.

The Shixing company is adopted on producing high quality Fused Cast AZS Block used in glass furnaces. Established to produce series of shaped blocks Fused Cast AZS-33# Block, Fused Cast AZS-36# Block and Fused Cast AZS-41# Block with annual production capacity 20,000 tons/year. New materials production zone is equipped with two high-temperature shuttle kilns, mainly producing Zircon Brick, Silica Brick, Magnesia Brick, etc.

19 janvier 2018

Glass Technology - Glass industry development of refractory materials

To extend the melting furnace kiln age must have two conditions: First, the integration of industry and trade branch of the refractory plant, to provide the furnace required for a variety of high quality refractory supporting materials; the second is to design, production, use and research Closely integrated, give full play to their advantages, so that the configuration of the whole furnace refractory more reasonable,

Superb design, meticulous operation, maintenance and management of high-quality refractory materials and supporting the supply must be closely integrated, in the past that one for a period of time, no communication, disjointed, the lack of overall concept of the situation is long-term melting furnace kiln do not enter One of the important reasons.



Based on past experience, with the strong technical strength of Trade, Industry and Trade Branch of refractory supporting group more suitable, on the one hand he based on a deep understanding of refractory properties and data master, you can recommend to the design and use of various supporting programs ,for selection;

On the other hand, it can also provide various kinds of high-quality refractory materials to users and keep track of the use of the refractory materials. It can continuously provide services to users and assist them in solving problems that may arise during their use. The four parties often string together, frequently communicate with each other, complement each other's advantages, Form a whole, work together to improve the melting furnace kiln age and various technical and economic indicators.

02 janvier 2018

Development trend of refractories for glass kiln

In order to cast refractory, for example, in recent years, China has built more than 30 cast-refractories enterprises, changing the reliance on imports of cast-cast refractory situation in China, the basic quality of their products to meet the glass melting furnace requirements. Exploration and establishment of alkaline refractory materials, silica bricks, zirconium corundum, mullite refractory and new unshaped refractories and other manufacturing enterprises supporting system. Create a strong enterprise that can provide refractory materials in the whole kiln. 



Refractory glass kiln use less and less consumption. As refractory quality and performance increase, the life of the glass furnace will be longer and longer. Currently, the new float glass furnace design life of up to 10 years, ordinary glass kiln life of 5 to 7 years, special glass kiln life expectancy of up to 2 years. In other words, the specific consumption of refractory materials will be smaller and smaller. Traditional silica brick, ordinary magnesia its dosage will be significantly reduced, while the quality of casting refractory material will be substantially increased. In addition, the new unshaped refractory material will also be a large number of glass melting furnace applications. 

Glass and refractory production enterprises to study the optimal allocation of refractory glass and refractory production enterprises to strengthen technical cooperation, in addition to research and development for glass furnace refractory new products, should focus on the different parts of glass furnace refractory optimization Configuration, more reasonable extension of furnace life and optimize the relevant technical indicators. 

Refractory materials for glass kilns will continue to evolve as the glass manufacturing industry develops. Refractories for glass kilns and glass manufacturing industry will promote each other in terms of development, promote each other technically and further interdependencies in operation obvious. 


29 décembre 2017

The best Vacuum Sintering Furnace by Luwei Furnace

Sintering is a process required for many different parts and applications, including powder metallurgy, metal injection molding (MIM) and 3D printing components of various types or beading applications including abrasives. 

High Temperature Vacuum Sintering Furnace is used in Sm-Co, AlNiCo, metal mesh, cemented carbide, ceramic materials, photoelectric coating materials, graphite purification, magnet material and rare refractory metals, alloys (tungsten, Mo, W-Cu alloy) vacuum sintering process, also support atmosphere sintering. Max temperature could be achieve 2200C. This equipment was based on international excellent equipment technology, after many times improvement. 



Vacuum Sintering Furnace
Brand Name: Luwei
Model: Vacuum Sintering Furnace
Max.Temperature: 2000°C
Working Temperature: 2000°C
Furnace Chamber Size: 200*200*200MM
Temperature Controller: PID and SCR
Control Accuray: ± 1°C
Heating Element: Graphite
Thermocouple: Tungsten-rhenium
Chamber Material: High purity Ceramic fiber 

The control system of Vacuum Sintering Furnace was controlled by PLC, temperature was controlled by intelligent temp controller, accurate control, high automation. User can choose auto or manual undisturbed switching to operate it, this furnace has abnormal condition alarming function, easy to operate. Environmental protection performance has been improved, maintenance cost saving, energy cost saving. 

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28 décembre 2017

The best Vacuum Annealing Furnace 1800°C by Luwei Furnace.

Vacuum Annealing Furnace that are widely used in various manufacturing units. Vacuum Annealing Furnace are fabricated using premium quality steel, refractory bricks and other heat supporting elements sourced from reliable vendors of market. 

Vacuum Annealing Furnace is applied for annealing and aging treatment of a variety of alloy materials, devices (tungsten, molybdenum, niobium, copper alloy, etc.), magnetic materials, electrical steel, magnetic alloy, stainless steel, heat-resistant alloys, copper and its alloys, hydrogen storage alloy, active and hard molten metal. 

Vacuum Annealing Furnace 1800°C
Brand Name: Luwei
Model: Vacuum Annealing Furnace 1800°C
Max.Temperature: 1800°C
Working Temperature: 1750°C
Furnace Chamber Size: 200*200*200MM
Temperature Controller: PID and SCR
Control Accuray: ± 1°C
Heating Element: MoSi2 heaters
Thermocouple: B type
Chamber Material: High purity Ceramic fiber 



Vaccum Annealing furnace 1800°C can be used for numerous purposes because they apply vacuum as well as inert atmospheres. This main application is debinding and subsequent sintering of ceramics or powder metallurgical parts. 

25 décembre 2017

Glass industrial waste refractory recycling technology

The European glass industry uses more than 100,000 tons a year for masonry kilns, which have a useful life of 5 to 8 years. The demolition of these kilns will generate thousands of tons of abandoned refractory materials, most of which will be sent to CETs or proprietary dumps.

 

 

To help users reduce the amount of waste refractory materials sent to landfills, the company is working with glass companies and kiln dismantling companies to establish standards for waste acceptance and to develop new products made from recycled materials.

 

At present, 30% to 35% of the silica bricks removed after the end of kiln service can be reused to make two other types of silica bricks, including siliceous wedges and light insulation Silica brick. The first European facility to comprehensively recycle spent refractory refractories specialized in the disposal of waste refractories from the glass industry, steel industrial furnaces, incinerators and chemical industries with a recovery of 90%.

 

Glass company will melt the wall of the kiln pool to cut the whole, re-use the effective part of the pool wall has been successful, and the ZAS brick surface with the glass removed after the use of quenching the brick crack, crushing, grinding, After screening different size fractions of aggregate and fine powder, used to produce cheap high-performance castable and iron ditch material.

 

 

18 décembre 2017

Refractory materials used in optical glass manufacturing

In recent years, due to the development of the optical glass industry, the optical glass of the new variety is continuously increasing, and the refractories of the optical glass are also developed correspondingly. In addition to the earliest use of clay, kaolin, bauxite and other natural raw materials to create refractory material. There are pure oxide refractory products. Such as fused silica products, fused corundum products and sintered mullite and other refractory materials. For some new varieties of optical glass melting also used tin dioxide ceramics, platinum, platinum alloys, carbon materials as smelting optical glass high temperature container, the development of new varieties of optical glass and increase the amount of optical glass have played a A certain role in promoting.



In the optical glass melting process, in order to use the crucible method and pool furnace melting method is more common. Crucible type more. Pool melting method with the main furnace using a variety of special shaped or special cast refractories. Although such materials have a complex manufacturing process but a wide variety and high resistance to glass erosion and high temperature mechanical strength, these materials provide the advantages of selective use for melting various glass varieties. Refractories include:

1. Melting optical glass crucibles and mixers

Aluminosilicate materials: clay kaolin crucible and stirrer, high aluminum lining material, SiOAI203 ~ SiO2: system of synthetic materials.

Quartz material: transparent and opaque fused quartz, quartz ceramic crucible. Corundum material: recrystallization sintering crucible, titanium corundum crucible and mixer.

Tin dioxide material: tin dioxide crucible carbon material: pyrolytic carbon crucible, glassy carbon crucible.

2. Optical glass pool furnace material

Fused quartz brick. Casting refractory materials, which include mullite, Cuomalaite, corundum oblique zircon, mouth corundum, Lu Hong, jade corundum and other fused brick.

In the aluminosilicate refractories, as a relatively old clay-kaolin refractories, due to a certain degree of high temperature, corrosion resistance, and the manufacturing process is simple, the advantages of low prices. So in the optical glass industry still occupies a very important position. Therefore, the research on the raw material properties, chemical mineral composition and manufacturing process of such refractories remains a focus of attention.



http://www.sxrefractory.com/news-23.php

11 décembre 2017

The current trend of glass furnace refractory applications

There are three main drivers of changes and developments in refractory materials. The first is the glass manufacturer's need to improve the quality of the glass, at least for the most part. The second is the economic requirements of glass furnaces to make kilns run longer, and the third is the impact and impact of pure oxygen combustion systems. These three requirements often determine the use of improved refractory materials when repairing a kiln. These impetuses have also prompted glass manufacturers to choose improved refractory products for furnace maintenance and to adopt new technologies for extensive overhaul in their operating cycles.



Melt-cast alumina bricks have established their use in the top of the melting tank, primarily in pure oxygen fired furnaces melting high-quality glass. Before the advent of pure oxygen combustion technology, only β ˉ alumina bricks were used to melt the superstructure of the cell and alumina-free bricks without melt-casting were applied to the top of the melting cell. Today, both molten cast products of β-alumina and α-β-alumina are used in the production of some or all of the roofs of pure oxygen combustion furnaces for color television sets (screens and cones), float glass and borosilicate glass on. Melt-cast AZS bricks can typically be used at 1600 ° C or 1650 ° C (depending on the glazing), while furnace tops made of fused alumina brick can be successfully run at 1700 ° C. This creates better conditions and greater flexibility for glass manufacturers in the production of refractory glass.

For many years, melt-cast AZS furnace roofs have successfully undergone the test of cooling and reheating to enable them to use multiple operating cycles. There is now a bit of experience in successfully implementing the top cooling and reheating of fused-alumina roofs, which represent an economically viable life when they use two or more cycles of operation. The results of the observation of the fused alumina roof in service (thermal observation and shutdown observation) show that these materials are both chemically and mechanically stable. This is the first observational study of such masonry because there was neither a reference to fused alumina at the time nor the empirical basis for its application to the roof.