CN201309894Y

CN201309894Y - Annular sleeve kiln

Info

Publication number: CN201309894Y
Application number: CNU2008201236115U
Authority: CN
Inventors: 王毅; 赵民革; 冯建设; 胡雄光; 张福明; 国金雁; 索明金; 祝少军
Original assignee: BEIJING SHOUGANG HUAXIA ENGINEERING TECHNOLOGY Co Ltd; Beijing Shougang Refractory & Metallurgical Burden Co Ltd; Shougang Corp; Beijing Shougang International Engineering Technology Co Ltd
Current assignee: BEIJING SHOUGANG HUAXIA ENGINEERING TECHNOLOGY Co Ltd; Beijing Shougang Refractory & Metallurgical Burden Co Ltd; Shougang Co Ltd; Shougang Corp; Beijing Shougang International Engineering Technology Co Ltd
Priority date: 2008-11-07
Filing date: 2008-11-07
Publication date: 2009-09-16
Anticipated expiration: 2018-11-07

Abstract

The utility model relates to an annular sleeve kiln which is characterized in that a working layer of fire-resisting material is as follows: an upper internal sleeve (1) is a clay brick body, a bottom (2) of the upper internal sleeve is a fire-resisting material integrally-pouring body, an upper kiln liner (3) is a clay brick body, a lower internal sleeve (4) is a magnalium spinelle brick and high alumina brick compounded body, a fire bridge (5) is a magnalium spinelle brick and high alumina brick compounded body, a middle kiln liner (6) is a magnalium spinelle brick body, a combustion chamber (7) is a magnalium spinelle brick body, a lower kiln liner (8) is a clay brick body, and an internal sleeve prop (9) is a fire-resisting material integrally-pouring body. The operation ratio of the kiln reaches 98 percent, and the service life of the kiln liners is obviously prolonged compared with the common level. Because the material cost is low, the comprehensive cost is obviously lowered.

Description

A kind of ring-shaped sleeve kiln

Technical field

The utility model relates to a kind of ring-shaped sleeve kiln that is used to handle massive ore, has rational thermal property, is particularly suitable for calcined limestone and rhombspar and generates high reactivity degree lime.

Background technology

The domestic main iron and steel enterprise of China generally uses the ring-type shaft furnace of similar structures to be used to calcine high reactivity degree lime, but because a variety of causes, refractory materials especially generally can not make the user satisfied the work-ing life of firebridge part in the kiln, some firebridges just collapsed about 2 years, need stop kiln for a long time and repair; The pure zirconia magnesite refractory that the combustion chamber part is used also often ruptures, can not be satisfactory.And in order to improve furnace service life, the external high-grade refractory materials that uses magnesium chromium matter usually of firebridge part not only makes the cost of kiln significantly improve at present, and production and use contain the chromium refractory materials and may pollute environment.In addition, use more special-shaped hanger brick in the prior art scheme, have processing difficulties, the problem of easy fracture in the work.

Summary of the invention

The purpose of this utility model is exactly by reasonably arranging the refractory materials of different varieties and performance in different zones, thereby improves furnace service life and reduce cost.

The approach that the utility model solves the problems of the technologies described above is: a kind of ring-shaped sleeve kiln, profile is a right cylinder, the inner cylinder of inner same vertical axis constitutes the ring cavity of a filling ore with it, the internal package refractory materials, be divided into furnace lining part, firebridge part, combustion chamber part, inner sleeve part and inner sleeve leg portion, its top is provided with the device of extracting gases and drops into the device of ore; It is characterized in that: the working lining of ring-shaped sleeve kiln refractory materials is: the top inner sleeve partly is clay brick masonry, the bottom of top inner sleeve is the integrated poured body of refractory materials, the top furnace lining partly is a clay brick masonry, the bottom inner sleeve partly is the compound masonry of Mg-Al spinel brick and high alumina brick, firebridge partly is the compound masonry of Mg-Al spinel brick and high alumina brick, the middle part furnace lining partly is the magnesium-aluminium spinel brick structures, combustor section is divided into the magnesium-aluminium spinel brick structures, the bottom furnace lining partly is a clay brick masonry, the inner sleeve leg portion is the integrated poured body of refractory materials.

The bottom of described top inner sleeve is the integrated poured body of steel fiber refractory castable, and outer rim has chamfering, whole one-tenth back taper ring-type.

Described inner sleeve leg portion is the integrated poured body of steel fiber refractory castable.

The beneficial effect that the utility model is obtained is: at the thermal technology's environment and the chemical environment of calcined limestone and rhombspar kiln inside, adopted basic refractories such as clay matter, high alumina matter, magnesium-aluminium spinel matter as working lining in a large number.Its medium clay soil matter and high alumina refractories are at China's technical maturity, and price is lower, are applied to preheating zone and cooling zone in utility model; Magnesia-alumina spinel refractory has high-temperature mechanics intensity height, the characteristics that heat-shock resistance is high, and nontoxic, be applied to temperature is the highest, temperature fluctuation is the most violent combustion chamber and firebridge part in the utility model, improved the firebridge life-span, prolong the stove labour cycle.In addition, the bottom of top of the present utility model inner sleeve is the integrated poured body of steel fiber castable, and construction technology is simple, and refractory materials is wear-resisting and the spalling resistance energy is good, can satisfy the requirement that works long hours, solve the drawback of using special-shaped hanger brick to exist in the prior art scheme.

Description of drawings:

Fig. 1 ring-shaped sleeve kiln synoptic diagram

Wherein: the bottom 2 of top inner sleeve part 1, top inner sleeve, top furnace lining part 3, bottom inner sleeve part 4, firebridge part 5, middle part furnace lining part 6, combustion chamber part 7, bottom furnace lining part 8, inner sleeve leg portion 9.

Embodiment:

Working lining by shown in Figure 1, a kind of ring-shaped sleeve kiln is: top inner sleeve part 1 is the integrated poured body of steel fiber refractory castable for the bottom 2 of clay brick masonry, top inner sleeve, outer rim has chamfering, whole one-tenth back taper ring-type, top furnace lining part 3 are that clay brick masonry, bottom inner sleeve part 4 and firebridge part 5 are MgO content 〉=76%, Al ₂O ₃Content range 10～15%, principal crystalline phase are that Mg-Al spinel brick and the compound masonry of high alumina brick, middle part furnace lining part 6 and the combustion chamber part 7 of magnesium-aluminium spinel is MgO content 〉=76%, Al ₂O ₃Content range 10～15%, principal crystalline phase are that magnesium-aluminium spinel brick structures, the bottom furnace lining part 8 of magnesium-aluminium spinel is the integrated poured body of steel fiber refractory castable for clay brick masonry, inner sleeve leg portion 9.

An application example of the present utility model is a seat ring shape sleeve kiln, and burning coal gas of converter calcined limestone is produced quickened lime, and day output is about 500t.At the bottom of calendar year 2001, build up, reach 6.5 years to the continuous production time second half year in 2007, during at the beginning of 2007, carry out once the cold kiln inspection, keep uninterruptedly producing, equipment operation rate reaches 98%, does not carry out medium-capital overhauling.The inner lining of kiln life-span significantly improves than common level.Because the cost of material is low for it, furnace service life is long, and the equipment operation rate height makes its comprehensive cost obviously reduce.

Claims

1, a kind of ring-shaped sleeve kiln, profile is a right cylinder, the inner cylinder of inner same vertical axis constitutes the ring cavity of a filling ore with it, the internal package refractory materials, be divided into furnace lining part, firebridge part, combustion chamber part, inner sleeve part and inner sleeve leg portion, its top is provided with the device of extracting gases and drops into the device of ore; It is characterized in that: the working lining of ring-shaped sleeve kiln refractory materials is: top inner sleeve part (1) is a clay brick masonry, the bottom of top inner sleeve (2) is the integrated poured body of refractory materials, top furnace lining part (3) is a clay brick masonry, bottom inner sleeve part (4) is Mg-Al spinel brick and the compound masonry of high alumina brick, firebridge part (5) is Mg-Al spinel brick and the compound masonry of high alumina brick, middle part furnace lining part (6) is the magnesium-aluminium spinel brick structures, combustion chamber part (7) is the magnesium-aluminium spinel brick structures, bottom furnace lining part (8) is a clay brick masonry, inner sleeve leg portion (9) is the integrated poured body of refractory materials.

2, a kind of ring-shaped sleeve kiln according to claim 1 is characterized in that: the bottom (2) of described top inner sleeve is the integrated poured body of steel fiber refractory castable, and outer rim has chamfering, whole one-tenth back taper ring-type.

3, a kind of ring-shaped sleeve kiln according to claim 1 is characterized in that: described inner sleeve leg portion (9) is the integrated poured body of steel fiber refractory castable.