Refractory material for lime kiln

There are many kinds of main shaft kiln, lime kiln, rotary kiln and annular kiln etc… Most of the countries with the shaft kiln production of lime; the lime requirement is large, using rotary kiln.

Lime shaft kiln feed around the mouth and pre tropical lining of the body temperature is low, mainly due to mechanical impact material and wear, can choose the dense clay brick masonry. Calcined lime kiln lining body, subjected to chemical erosion wear, material flow and CaO at high temperature, rapid damage. For the small shaft kiln, generally used in low porosity and high alumina brick and illuminate brick; for large shaft adopt magnesia chrome brick, magnesia brick, magnesia spinel brick and brick for burning zone lining of the body.

Lime shaft kiln cooling zone and a lining material around the mouth, using the temperature is relatively low; damage reason is lime wear and alternating hot and cold induced temperature difference, the site selection of high – strength of clay brick masonry.

The vulnerable influence of refractory castable in construction

1.    The construction of pouring space is small, the construction personnel usually add more water in the mixing, so that you can make the refractory castable has good mobility, but also increase the refractory lining hole body,

reduces the compactness of the lining of the body, and its strength is reduced: the same, lining of the body vibration imperfect, will shorten the service life of refractory castable.

2.     Lining thickness, pouring a small space, many staple clouds between the die and the burner, pouring and vibrating, vibration bar operation very difficult, operation not skilled or not serious, refractory castable is vibrating imperfect.

3.     After pouring, without adequate maintenance, as the lining of the body low early strength, loose structure, often too late to sintering have damaged; the lining body warms up abruptly, sometimes burst.

4.     Winter construction, the ambient temperature is low the binder (hydration) hydration of incomplete or water, or pouring body cold, would seriously reduce the refractory castable strength or destroy its structure, and affecting the use effect.

Refractories——Corundum

Corundum is one of the most important refractory raw materials, the use of corundum refractory products manufactured in aluminum MgO-C ladle, ladle prefabricated blocks, torpedo and other industries are widely used. Now, with the continuous development of high-temperature industrial technology, constantly upgrading equipment,

innovative theories, especially the application of new technologies in recent years, the metallurgical industry, more to promote the adjustment of product structure refractories, corundum in refractories use the proportion is growing.

In recent years, large and small manufacturers continue to rise corundum, production quality is uneven, use, corundum refractories produced in various industrial applications, there are various problems chalking bursting. The main problem is exposed high levels of impurities corundum, alumina content but related issues.

High impurity content of corundum,products will cave in there, it will affect the quality of subsequent products. The low alumina content intolerance can lead to corrosion of the products. Meanwhile corundum powder particles cause problems exposed cracks in the production of products, the bursting of the situation.

Corundum products because of non-compliance on the one hand a small production companies for lower prices deliberately low-quality goods, on the other hand there are the production and use of business-to-business product parameters sufficient reason Communication Department. Luoyang Yilong Refractory Co.Ltd help customers understand their requirements through the use of sales, specifications, parameters and other conditions, the concept of vague answer your technical staff is also actively through the exchange and technical visits with customers to fully understand customer intent determining product specific parameters. At the same strict quality control in the production process. Produced corundum product quality, stable performance. welcome to consult and order.

Analysis of the furnace refractory fiber shedding

The use of coal tar as a trolley furnace heating fuel, did not use the media atomization or purge, often caused by poor atomization flame and combustion endless phenomenon of black smoke and coke burners serious, on the surrounding environment cause great pollution.

Because it is artificial ignition, Yilong refractory fiber board left some gaps around each burner for ignition purposes, the ignition process, coal tar easily leak from the ignition mouth, unpleasant taste, acting on the skin will cause a variety of toxic dermatitis, and long-term inhalation can cause nasal injury, leading to cancer.

Due to the use of coal tar, fuel burning ember of the lower part of the fuel and the combustion flue gas flow with the dust, erosion and attached to the furnace wall, causing cooling the outer surface of the furnace wall refractory fiber compaction, formed on the surface of the furnace wall refractory fiber tension, causing refractory fiber powder and caused chunks off, shortening the life of the furnace.

Sealing mechanism using a knife in the form of letters, the use of positive pressure stove running, forged into the workpiece when the car needs many times

the material, so that the blade moving sands production region accumulation tank seal uneven, resulting in lower blade seal, the seal poor areas appear hot flue gas spills, foam isolation seal groove with a blade or burned, the sealing effect rapidly reduced after a vicious cycle.

 On the part of the car with a small gap between the furnace wall trolley furnace refractory, heat distortion seal groove blade or even affect the normal out of the trolley, and therefore had to knock out the hot stove inserts to improve the car's normal into the furnace, which will result in a flaming furnace trolley serious.

Technical characteristics of the vacuum fiberboard

Low thermal conductivity, heat capacity; excellent thermal stability and thermal shock resistance; high strength and good toughness.

Application:

1. Industrial furnace wall lining, masonry insulation layer;
2. High-temperature furnace kiln liner, kiln cars, door tailgate, kiln furnace partition plate;
3. High-temperature, heat equipment insulation, thermal insulation;
4. Aerospace, shipbuilding insulation, fire protection, sound insulation.

Working temperature:

Depending on the type of heat source, atmosphere and material conditions.

Production

Various aluminum silicate fiber, using the corresponding ordinary type, standard, high purity type, containing zirconium silicon fiber cotton as raw material,

using vacuum filtration processes or dried into the legal system.

In addition to a variety of aluminum silicate fiber corresponding bulk silicate fiber cotton excellent performance, hard texture, excellent toughness and strength, excellent fire resistance, thermal insulation properties. Heating is not expansive, light weight, convenient construction, can be cut bent and is ideal for energy-saving materials furnaces, heat pipes and other equipment.