CN101655314A - Annular reduction furnace capable of not leaking material at furnace bottom - Google Patents
Annular reduction furnace capable of not leaking material at furnace bottom Download PDFInfo
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- CN101655314A CN101655314A CN200910019036A CN200910019036A CN101655314A CN 101655314 A CN101655314 A CN 101655314A CN 200910019036 A CN200910019036 A CN 200910019036A CN 200910019036 A CN200910019036 A CN 200910019036A CN 101655314 A CN101655314 A CN 101655314A
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Abstract
The invention discloses an annular reduction furnace capable of not leaking material at furnace bottom. The annular reduction furnace comprises a furnace frame, an outer furnace wall, a furnace bottom, a water seal tank, a furnace bottom mechanism and an inner furnace wall, a circle of humps is respectively provided at the part of the inner and outer furnace walls above the furnace bottom, the humps and the furnace bottom coincide partially along the horizontal direction, and a certain gap is formed between the humps and the furnace bottom along the vertical direction. The annular reduction furnace capable of not leaking material at furnace bottom sets a leakage-proof structure in the inner and outer furnace walls, and the leakage-proof structure can not hinder the rotation of the furnacebottom and can effectively prevent the material from entering the water seal tank in the spreading process and the roasting and reduction process so as to reduce the cleaning work of the water seal tank.
Description
Technical field
The present invention relates to a kind of annular reduction furnace, particularly a kind of furnace bottom does not leak the annular reduction furnace of material.
Background technology
The annular reduction furnace is a kind of new reduction apparatus, has annular furnace and rotating furnace bottom, thereby is named rotary hearth furnace (RHF) again.It is to transplant from the steel rolling rotary heating furnace.Its raw material is the pelletizing and the compound of carbon containing.Having many uses of it.
1.1 transfer direct reduction or prereduction equipment to
1, equipment of direct reduction: high grade iron breeze and low ash coal are produced the high metal pelletizing power supply stove of degree of metalization and are used.
2, the prereduction equipment of melting and reducing: the low Iron Ore Powder of grade reduces, melts, makes slag, iron to separate with the product needed that coal obtains through whole, obtains the pig iron.
3, handle iron-containing dusts in steel plant, the degree of metalization of product is higher, can be used as blast furnace raw material.
4, handle the iron and steel zinc-containing dust and reclaim zinc.
5, use rotary hearth furnace prereduction; Electricity consumption furnace final reduction and molten the branch, and with titanium enrichment in slag.
6, use rotary hearth furnace prereduction: reclaim Cr, Ni.
1.2 as difficult ore dressing drastic reduction equipment
China is annual at present from the nearly 400,000,000 tons of iron ores of external import, because rise in oil price, ocean freight raises, and world iron ore giant unite rise in price, iron ore price goes up year after year, went up 65% in 08 year, current Ore Imported C.I.F. is above 200 dollars/ton, domestic iron ore concentrate price has reached 1400～1600 yuan/t (65TFe%), make China's steel and iron industry development be subjected to serious disturbance, cause the profit margin of iron and steel production to reduce significantly, steel products are forced to raise the price, and then seriously disturb China's economic development.
The exploitation china natural resources reduces the degree of dependence to Ore Imported, is the significant problem that is related to China's sustainable development of iron and steel industry.China has not optional in a large number and refractory iron ore and iron content mineral intergrowth resource, owing to be difficult to select separating/enriching to become can satisfy the needs iron ore concentrate of blast furnace, and fail to be exploited.For example: the oolitic hematite on ground such as Hunan, Hubei, the ultra-fine grain bloodstone of Inner Mongol, the limonite of Lingyuan, Liaoning, the antelope stone iron ore of Jilin Bai Shanyi band, low nickel laterite in Yunnan or the like.The characteristics of these ores are that the grain graininess of iron mineral is trickle, iron mineral and gangue realization monomer separation difficulty; Or iron mineral itself is a complex mineral; Or iron mineral character is special, can't use conventional method separation and concentrations such as magnetic, floating, gravity treatment, can't enrichment with present conventional technique of preparing, and become " staying the ore deposit ".
If can adopt new technology to handle these mineral resources, realize the utilization of these mineral resources, will alleviate, break away from the degree of dependence of China's steel and iron industry to foreign resources, important effect is played in the development of the steel and iron industry of China.
Earlier the iron mineral in the refractory iron ore being utilized rotary hearth furnace drastic reduction method can not or to be difficult for choosing divides iron mineral to be converted into the iron mineral (as magnetic iron ore, metallic iron) that is easy to select branch, be reduced into metallic iron, and make its generation limited " polymerization " with reducing condition (reduction temperature, recovery time, mixed carbon comtent), make the iron particle of formation can satisfy the needs of beneficiating process, go back original product and cool off with the mode of chilling, shrend.Rely on iron granule and gangue hot property difference mutually, cause the change that combines between iron particle and gangue.By the broken or pulverizing of " appropriateness ", make metallic iron realize monomer separation mutually then with gangue.Finally by magnetic selected/mode of gravity treatment realizes separating of iron and gangue, the final products of acquisition are based on metallic iron, high-grade, high metallization " reduced iron product " and powdery gangue---tailings.Final grade ≮ 85% that obtains iron, the product of degree of metalization ≮ 85%, the iron yield of product are not less than the iron yield (≮ 85%) of conventional ore dressing iron, reach the utilization of refractory ore.For the ease of transportation, the utilization of product, product will be processed into the briquetting state.
The stove frame and the furnace wall of rotary hearth furnace are fixed, and furnace bottom machinery drives furnace bottom and makes circular motion, need the bank of reduction to be placed on the furnace bottom, reduce by the radiant heat transfer material.As a kind of reduction apparatus, its burner hearth is a reducing atmosphere, requires the air No Admittance, so all be to adopt water seal at the bottom of the fixedly housing of rotary hearth furnace and the revolving burner, the rotary hearth furnace that exists is easy to fall in the water sealed tank at the process material of cloth and roasting reduction at present, and cleaning is got up pretty troublesome.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of furnace bottom not leak the annular reduction furnace of material, material is difficult for falling in the water sealed tank in the process of cloth and roasting reduction.
In order to solve the problems of the technologies described above, the present invention includes stove frame, outer furnace wall, furnace bottom, water sealed tank, furnace bottom machinery and inner furnace wall, described outer furnace wall and inner furnace wall are positioned on the position of furnace bottom top and are equipped with a circle projection, projection partially overlaps in the horizontal direction with furnace bottom, and projection has certain interval with the furnace bottom in the vertical direction.
For better anti-leak-stopping material, the part that described projection is positioned at feeding section is provided with heat resistant rubber, and the bottom of heat resistant rubber is lower than the bottom of projection.
For better anti-leak-stopping material, described protruding bottom is vertical, top tilts to connected body of wall.
The invention has the beneficial effects as follows: the present invention's outer furnace wall and inner furnace wall are provided with leakage-proof structure, and it neither can hinder the rotation of furnace bottom, can effectively stop material to enter water sealed tank in the process of cloth and roasting reduction again, have reduced the cleaning work to water sealed tank.
Description of drawings
Fig. 1 is an entire infrastructure schematic diagram of the present invention; Fig. 2 is the flat figure layout drawing of furnace bottom of the present invention position; Fig. 3 is the I portion enlarged drawing of Fig. 1;
Among the figure: 1, stove frame, 2, outer furnace wall, 3, material, 4, furnace bottom, 5, water sealed tank, 6, furnace bottom machinery, 7, inner furnace wall, 8, projection, 9, heat resistant rubber.
The specific embodiment
Do not leak the annular reduction furnace of material as Fig. 1, Fig. 2 and a kind of furnace bottom shown in Figure 3, comprise stove frame 1, outer furnace wall 2, furnace bottom 4, water sealed tank 5, furnace bottom machinery 6, inner furnace wall 7, heat resistant rubber 9.As shown in Figure 1, outer furnace wall 2 and inner furnace wall 7 are arranged in the stove frame 1, form an annular furnace between outer furnace wall 2 and the inner furnace wall 7, and furnace bottom 4 is located at the bottom of annular furnace, furnace bottom machinery 6 is arranged on the below of furnace bottom 4, and furnace bottom machinery 6 can drive furnace bottom 4 and make circular motion in annular furnace.The bottom of outer furnace wall 2 and furnace bottom 4 is provided with water sealed tank 5, and the bottom of inner furnace wall 7 and furnace bottom 4 is provided with water sealed tank 5.Two water sealed tanks 5 can carry out hermetic seal to burner hearth.
As Fig. 1, shown in Figure 3, outer furnace wall 2 and inner furnace wall 7 are positioned at and are equipped with a circle projection 8 on the position of furnace bottom 4 tops, and projection 8 partially overlaps in the horizontal direction with furnace bottom 4, and projection 8 has certain interval with furnace bottom 4 in the vertical directions.Projection 8 is provided with heat resistant rubber 9.The thickness of heat resistant rubber 9 is about 10mm, is fixed on the projection 8 with dormant bolt, and heat resistant rubber 9 is added in 90 of feeding section place and spends on the circular arcs (as shown in Figure 2).Other need not add.
Each mark expression respectively among Fig. 3:
A is the gap of the circumferencial direction of outer furnace wall 2 (or inner furnace wall 7) and furnace bottom 4;
B equals the lap of splice+A of outer furnace wall 2 (or inner furnace wall 7) and furnace bottom 4, and outer furnace wall 2 (or inner furnace wall 7) is generally 100mm with the lap of splice of furnace bottom 4;
C is the gap of outer furnace wall 2 (or inner furnace wall 7) and furnace bottom 4 vertical direction;
D is the backgauge height of projection 8.
The α angle is more than or equal to more than 60 degree.
When the material 3 of needs reduction was the pelletizing of compacting, the C value was less than the height of pelletizing;
The material 3 that reduces when needs is that the general 30～50mm of C value is advisable when pressing compound.The D value is advisable to fix heat resistant rubber, general 130mm.
Claims (3)
1, a kind of furnace bottom does not leak the annular reduction furnace of material, comprise stove frame (1), outer furnace wall (2), furnace bottom (4), water sealed tank (5), furnace bottom machinery (6) and inner furnace wall (7), it is characterized in that: described outer furnace wall (2) and inner furnace wall (7) are positioned on the position of furnace bottom (4) top and are equipped with a circle projection (8), projection (8) partially overlaps in the horizontal direction with furnace bottom (4), and projection (8) has certain interval with furnace bottom (4) in the vertical direction.
2, furnace bottom according to claim 1 does not leak the annular reduction furnace of material, it is characterized in that: the part that described projection (8) is positioned at feeding section is provided with heat resistant rubber (9), and the bottom of heat resistant rubber (9) is lower than the bottom of projection (8).
3, furnace bottom according to claim 1 does not leak the annular reduction furnace of material, it is characterized in that: described projection (8) bottom is vertical, top tilts to connected body of wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910019036A CN101655314A (en) | 2009-09-27 | 2009-09-27 | Annular reduction furnace capable of not leaking material at furnace bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910019036A CN101655314A (en) | 2009-09-27 | 2009-09-27 | Annular reduction furnace capable of not leaking material at furnace bottom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101655314A true CN101655314A (en) | 2010-02-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910019036A Pending CN101655314A (en) | 2009-09-27 | 2009-09-27 | Annular reduction furnace capable of not leaking material at furnace bottom |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107653355A (en) * | 2017-11-01 | 2018-02-02 | 中冶京诚工程技术有限公司 | Rotary type arc furnace bottom and electric arc furnaces |
| CN109631579A (en) * | 2018-11-30 | 2019-04-16 | 武汉科技大学 | A kind of annular grate-firing furnace applied to powder material |
-
2009
- 2009-09-27 CN CN200910019036A patent/CN101655314A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107653355A (en) * | 2017-11-01 | 2018-02-02 | 中冶京诚工程技术有限公司 | Rotary type arc furnace bottom and electric arc furnaces |
| CN109631579A (en) * | 2018-11-30 | 2019-04-16 | 武汉科技大学 | A kind of annular grate-firing furnace applied to powder material |
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Open date: 20100224 |