Common Refractoriness Andalusite Powder Key Ingredient for Andalusite Refractory Brick

 Andalusite is an aluminosilicate mineral that is used to make refractories and porcelain in spark plugs.There is a variety of andalusite called hollow SPAR.The section of hollow SPAR will show a black cross structure.The cross structure is the result of some of the carbon and clay that the andalusite received when it formed.This hollow SPAR is often made into small ornaments that people wear.Andalusite is usually columnar crystal, its cross section is almost square.The crystals of andalusite cluster together in a radial or granular form.The radial andalusite is often called "chrysanthemum stone," meaning that it opens like a chrysanthemum petal.Andalusite is pink, red, reddish brown, grayish white and light green, with a glassy luster.Some fine, transparent andalusite crystals are considered precious stones.

Andalusite • Instructions for use
Andalusite is one of the known high quality refractory materials because of its physical and chemical properties.In addition to being used as the raw material of advanced refractories for smelting industry and technical ceramics industry, it can also be used for smelting high strength light silicon aluminum alloy, making metal fiber and guiding for supersonic aircraft and spacecraft.It is reported that aluminum-rich andalusite is still used for coal gasification and radar radome manufacture abroad.A part of good crystallization, bright color can also be made handicrafts and ornaments.Its applications continue to expand.
Andalusite • Production process
In general, the development and utilization of red pillar ore should focus on economic benefits, and put forward different requirements of indicators from various angles of use.At present domestic in this respect, there is no unified regulation, with reference to the land of total bureau of national geological - (1978) no. 1201, no. 3278 (78) smelting word metallurgical department jointly issued: "about the exploration and mining design arrangement disthene construction notice, briefly as follows: 1, andalusite ore grade (mineral) : it is divided into cutoff grade 5%;Ⅰ grade ≥8%, lead grade 5 ~ 8%.
2, the thickness of mining, stone removal thickness are 1 meter.
The industrial use of andalusite is mainly to take its high temperature resistance.When andalusite is heated to 1350℃ at atmospheric pressure, it begins to transform into acicular mullite parallel to the original crystal.Mullite crystal is the only stable form of aluminosilicate under high temperature, and its theoretical conversion is 87.64%.
During the transformation of andalusite into mullite by heating, a good mullite network can be formed, with volume expansion of about 4%.This is a kind of irreversible crystal transformation, once the transformation, has higher fireproof performance, can reach more than 1800 ℃, refractoriness and quench heat resistance, mechanical strength, thermal shock is strong, strong slag resistance, high load conversion point and high chemical stability (even not soluble in hydrofluoric acid) and strong resistance to chemical corrosion.

Application of andalusite in blast furnace iron groove charge
With the enlargement of the blast furnace, the scour force and wear of molten iron and slag increase, especially the working conditions of the main ditch are increasingly harsh and the life of the main ditch is reduced. In order to change this phenomenon, Li Yuepu et al. used andalusite in the production of the iron ditch material, and used the characteristics of andalusite to improve the performance of the main ditch castable.According to different requirements in production, adding different size (0~ 1mm, 0.074mm) castable of red stone iron groove is beneficial to reduce the apparent porosity of castable, improve the normal temperature compressive strength, and improve the thermal shock stability of castable.The better the quality of andalusite, the better the effect and high temperature performance.
With the addition of andalusite in the iron groove castable, the single outlet of the 250m3 blast furnace can be used to transfer 80,000 to 120,000 tons of iron at one time, and the service life can reach more than 1.5 million tons through spraying and casting repair in the middle, which reduces the production cost.Using mechanism, which make use of andalusite in pyrolysis, can produce a certain amount of mullite and liquid phase, generated by the mullite help castable improvement of thermal shock resistance and refractoriness under load, and the some liquid can not only promote the sintering matrix and aggregate tightly integrated, can also be closed pores, reduce products show porosity, character such as improve the compression strength of the castable.

Packaging

1. 1 ton bags in container, 25 MT/20'FCL.
2. 25kg bags in container, 25 MT/20'FCL
3. 25kg bags in ton bags, then in container, 25 MT/20'FCL
4. as the customer' request

Packaging of SK37 High Alumina Refractory Brick

1.on wooden pallets with plastic cover: wooden pallet size :930*930 or 1000*1000mm,
2.Load weight of each pallet: 1.5-2.0 tons,

Shipping of SK37 High Alumina Refractory Brick

1.Our packaging is as per customer’s request
2.Normal goods delivered by sea transport
3.Sample shipping by express
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Delivery:

15-30 days working day for large quantity. The shipment we will arrange as soon as possible. Of course, if it is a custom products, the shipping time will delay.
Sample:

Usually by EMS, DHL, UPS, TNT, FedEx. Anyway you like. Bulk order: Usually by sea.

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Our products have been exported to many countries: Australia, Chile, USA, Russia, UK, Indonesia, etc., good quality have be approved by our clients.

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Henan hongtai kiln refractory co., LTD. Main products are high alumina brick, clay brick, fused zirconium corundum brick, fireproof ball lightweight insulation brick, wear-resistant pouring material, corundum pouring material, low cement high strength pouring material, impermeable material, self-flowing material, plastic material, and various types of refractory materials.For different industries, the cement industry with anti-flaking high-alumina bricks, alkali resistant bricks, phosphate bricks;Boiler industry USES all kinds of brand wear-resisting brick, corundum brick, mullite brick and other finalizing materials.The company insists on "product quality is the life, enterprise integrity is the foundation", in the fierce market competition, won many users' trust and praise.The products are sold all over the country, as far as Vietnam, India, Korea, Pakistan, kazakhstan, other southeast Asian countries and regions.

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