CN201327290Y - Environmental protective high-temperature shaft kiln - Google Patents
Environmental protective high-temperature shaft kiln Download PDFInfo
- Publication number
- CN201327290Y CN201327290Y CNU2008202381898U CN200820238189U CN201327290Y CN 201327290 Y CN201327290 Y CN 201327290Y CN U2008202381898 U CNU2008202381898 U CN U2008202381898U CN 200820238189 U CN200820238189 U CN 200820238189U CN 201327290 Y CN201327290 Y CN 201327290Y
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- China
- Prior art keywords
- brick
- layer
- kiln
- temperature shaft
- liner
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Abstract
The utility model relates to an environmental protective high-temperature shaft kiln, which belongs to the technical field of calcining equipment. The kiln body of the environmental protective high-temperature shaft kiln is cylindrical, the kiln wall comprises an alumina silicate fiber layer, a high alumina heat-insulative brick layer and a special magnesium brick layer which are arranged in sequence from outside to inside. The environmental protective high-temperature shaft kiln is characterized in that a large crystalline magnesium brick liner layer is laid on the inner surface of the kiln wall. By adopting the large crystalline magnesium bricks as the liner of the operational layer of the calcining zone of the high-temperature shaft kiln, because the large crystalline magnesium bricks have ideal high-temperature folding resistance and thermal shock stability and contain a small amount of SiO1 and Fe2O3 which can react with the CaO in the calcined material to generate C3S and C2F, the generated substances can form a compact protective layer on the surface of the liner, thereby avoiding the surface of the lining layer from being flushed by the material and flaking off, and achieving the purpose of prolonging the service life; in addition, the requirement on environmental protection can be met because harmful substances can not be generated.
Description
Technical field
The utility model relates to a kind of environment-friendly high-temperature shaft furnace, and especially a kind of improvement of high temperature vertical kiln fire brick layer structure belongs to the calciner technical field.
Background technology
High temperature vertical kiln is the kiln type that a kind of hear rate is low, can calcine the high-quality high product as the calciner of dolomite, magnesia and lime stone, and has advantages such as automaticity height, easy to operate, small investment, is therefore generally admitted.But the anti-material of this high temperature vertical kiln calcining zone working lining is short service life, often occurs peeling off, and easily and the phenomenon that bonds together of material, particularly dolomite material, thereby has restricted applying of this kiln.
In the past, adopted magnalium crystallization stone brick or magnesite-chrome brick liner usually as the calcining zone working lining.But the CaO reaction that magnalium crystallization stone is easy to when high temperature in the material forms C
3Al, and form certain liquid phase, make material and Mg-Al spinel brick combine, after long-time the erosion, the surface of brick can be peeled off.So adopting magnalium crystallization masonry is the liner weak point in service life of calcining zone working lining, generally is no more than half a year.In addition, contain Cr in the magnesite-chrome brick
2O
3Though, Cr
2O
3Itself is nontoxic, but it can formation Cr with kiln gas and alkaline material reaction
6+, and Cr
6+Be toxic material soluble in water, the person and environment are produced harm greatly.In addition, magnesite-chrome brick is easy to peel off in kiln, and service life is very short.Therefore, selecting suitable firebrick structure to be applied to the high temperature vertical kiln liner is very important.
The utility model content
The purpose of this utility model is: the problem at the above high temperature vertical kiln liner of anti-the material exists by the reasonable setting of fire brick layer and the reasonable selection of material, proposes a kind of long service life, the good environment-friendly high-temperature shaft furnace of the feature of environmental protection.
In order to reach above purpose, the kiln body of environment-friendly high-temperature shaft furnace of the present utility model is cylindric, the kiln wall of described kiln body comprises alumina silicate fibre layer, high-alumina insulated brick layer and extraordinary magnesia brick layer from outside to inside, and its improvements are: the kiln wall inner surface of described kiln body is built big crystallization magnesia brick inner liner.
It is that the mortar joint between the adjacent fragment of brick of described big crystallization magnesia brick inner liner is 2 ± 0.2mm that the utility model further improves.Further improving is that described big crystallization magnesia brick layer horizontal direction leaves the dilatation joint that doubles mortar joint every four fragments of brick.
Adopt the liner of big crystallization magnesia brick,, and contain a small amount of SiO in its composition because big crystallization magnesia brick has desirable high temperature fold resistance and thermal shock resistance as high temperature vertical kiln calcining zone working lining
2And Fe
2O
3, and these materials can react with the CaO in the calcining materials and generate C
3S and C
2F generates material and forms fine and close protective layer at the inner lining surface of anti-the material, peels off thereby can avoid liner surface to be washed away by material, reaches the purpose that increases the service life.And owing to can not produce harmful substance, so compliance with environmental protection requirements.
In addition, guarantee brickwork joint, and leave enough spaces for the expansion of refractory brick, avoided the mutual crimp that causes because of mortar joint is too small, also help to prolong its service life by the characteristic of big crystallization magnesia brick.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of an embodiment of the utility model.
Fig. 2 is the B-B cross-sectional view of Fig. 1.
The specific embodiment
Present embodiment adopts the liner of big crystallization magnesia brick as the high temperature vertical kiln calcining zone, and Qi Yaobi is followed successively by as shown in Figure 1 from inside to outside: big crystallization magnesia brick inner liner 4, extraordinary magnesia brick 3, high-alumina insulated brick 2 and alumina silicate fibre 1.The kiln body is cylindric, above-mentioned refractory material be evenly distributed in kiln around, different fire brick layers leaves different mortar joints and dilatation joint.Mortar joint between the big crystallization magnesia brick is 2mm, leaves the dilatation joint of 4mm between per four bricks; Mortar joint between the extraordinary magnesia brick is 2mm, leaves the dilatation joint of 4mm between per 15 bricks; Mortar joint between the heat insulation high-alumina brick is 2mm.
When refractory brick is made; need being installed the refractory brick perforation of nozzle 5 reserves; as shown in Figure 2; the big crystallization magnesia brick middle part that nozzle 5 places are installed is shaped on the perforation that matches with nozzle od; cause the damage of this body structure of brick to avoid in work progress, punching; protect the overall structure of refractory brick, further prolong the service life of refractory brick.
In addition, adopt the heating mode of preliminary drying method during calcining, it is mild and balanced to guarantee effectively that big crystallization magnesia brick heats up, and avoids causing the fragmentation of big crystallization magnesia brick too soon owing to heat up in baking kiln temperature-rise period, to guarantee the service life of big crystallization magnesia brick.
In addition to the implementation, originally practical can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation form, all drop on the protection domain of the utility model requirement.
Claims (4)
1. environment-friendly high-temperature shaft furnace, the kiln body is cylindric, and the kiln wall of described kiln body comprises alumina silicate fibre layer, high-alumina insulated brick layer and extraordinary magnesia brick layer from outside to inside, it is characterized in that: the inner surface of described kiln body is built big crystallization magnesia brick inner liner.
2. environment-friendly high-temperature shaft furnace according to claim 1 is characterized in that: the mortar joint between the adjacent fragment of brick of described big crystallization magnesia brick inner liner is 2 ± 0.2mm, and described big crystallization magnesia brick layer horizontal direction leaves the dilatation joint that doubles mortar joint every four fragments of brick.
3. environment-friendly high-temperature shaft furnace according to claim 2 is characterized in that: the big crystallization magnesia brick middle part that described big crystallization magnesia brick inner liner is installed the nozzle place is shaped on the perforation that matches with nozzle od.
4. environment-friendly high-temperature shaft furnace according to claim 3 is characterized in that: the dilatation joint that leaves 4mm between per 15 brick of described extraordinary magnesium layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202381898U CN201327290Y (en) | 2008-12-23 | 2008-12-23 | Environmental protective high-temperature shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202381898U CN201327290Y (en) | 2008-12-23 | 2008-12-23 | Environmental protective high-temperature shaft kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201327290Y true CN201327290Y (en) | 2009-10-14 |
Family
ID=41179262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202381898U Expired - Lifetime CN201327290Y (en) | 2008-12-23 | 2008-12-23 | Environmental protective high-temperature shaft kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201327290Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183146A (en) * | 2011-03-03 | 2011-09-14 | 洛阳市科创耐火材料有限公司 | Integral casting technology of vertical limekiln working lining |
| CN109341327A (en) * | 2018-09-11 | 2019-02-15 | 海城海鸣矿业有限责任公司 | A kind of bottom water injection forces the high temperature vertical kiln of reduction material temperature |
-
2008
- 2008-12-23 CN CNU2008202381898U patent/CN201327290Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183146A (en) * | 2011-03-03 | 2011-09-14 | 洛阳市科创耐火材料有限公司 | Integral casting technology of vertical limekiln working lining |
| CN109341327A (en) * | 2018-09-11 | 2019-02-15 | 海城海鸣矿业有限责任公司 | A kind of bottom water injection forces the high temperature vertical kiln of reduction material temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU SINOCALCI CO., LTD. Free format text: FORMER NAME: SUNPOWER EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 21, building 210009, block B, science and technology innovation building, Nanjing University of Technology, Nanjing, 5 new exemplary Road, Jiangsu, China Patentee after: SINOCALCI Corporation Address before: 21, building 210009, block B, science and technology innovation building, Nanjing University of Technology, Nanjing, 5 new exemplary Road, Jiangsu, China Patentee before: Sunpower Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091014 |
|
| CX01 | Expiry of patent term |