CN202945295U - Device for improving thermal explosion property of iron ore - Google Patents
Device for improving thermal explosion property of iron ore Download PDFInfo
- Publication number
- CN202945295U CN202945295U CN 201220613941 CN201220613941U CN202945295U CN 202945295 U CN202945295 U CN 202945295U CN 201220613941 CN201220613941 CN 201220613941 CN 201220613941 U CN201220613941 U CN 201220613941U CN 202945295 U CN202945295 U CN 202945295U
- Authority
- CN
- China
- Prior art keywords
- iron ore
- travelling belt
- thermal
- outlet
- belt group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model discloses a device for improving the thermal explosion property of an iron ore, and belongs to the technical field of iron ore thermal treatment. The device comprises an iron ore thermal explosion heating furnace, a blast-furnace gas nozzle, an iron ore inlet, an upper-layer iron ore conveyor belt group, a middle-layer iron ore conveyor belt group, a lower-layer iron ore conveyor belt, a coarse-grained fraction iron ore outlet, a middle-grained fraction iron ore outlet, a micro-grained fraction iron ore outlet and a round roller sieve. The device provided by the utility model uses an iron ore thermal explosion heating furnace with a subsection design, so that speeds of evaporating water in the iron ore, releasing an internal stress, and decomposing crystal water and carbonate through an iron ore thermal explosion heating furnace with a subsection design can be slowed down; the flaw generation in a process of heating the iron ore is reduced; and the thermal explosion property of the iron ore can be improved. Meanwhile, a thermal explosion reaction of the iron ore occurs in the device in advance, so that the explosion and pulverization of the iron ore in a blast furnace can be greatly reduced, and the air permeability at the upper part in the blast furnace is improved.
Description
Technical field
The utility model relates to iron ore heat treatment technics field, particularly a kind ofly utilizes three layers of syllogic thermal spalling stove pre-treatment iron ore to improve the device of iron ore thermal decrepitation.
Background technology
The thermal decrepitation of iron ore is one of important indicator of weighing quality of iron ore, iron ore in the blast furnace middle and upper part is subjected to thermal process due to the thermolysis of crystal water and carbonate etc. in the internal stress of iron ore self and iron ore, and the evaporation of natural moisture can cause the iron ore breaking and Dusting, blast furnace middle and upper part ventilation property is worsened, bring for the normal operation of blast furnace unfavorable.At present, research for the iron ore thermal decrepitation mainly concentrates on the discussion of iron ore thermal spalling assessment of indices apparatus and method and improves, and less for the research that improves the iron ore thermal decrepitation, there is no at present a kind of device that effectively improves the iron ore thermal decrepitation.
Summary of the invention
Cause ore explosion efflorescence in order to solve iron ore thermal spalling in blast furnace, affect the problems such as normal operation of blast furnace, the utility model provides a kind of and has utilized three layers of syllogic thermal spalling stove pre-treatment iron ore to improve the device of iron ore thermal decrepitation, and this device comprises iron ore thermal spalling process furnace, blast furnace gas burner nozzle, iron ore entrance, upper strata iron ore travelling belt group, middle level iron ore travelling belt group, lower floor's iron ore travelling belt, the outlet of coarse fraction iron ore, the outlet of middle grade iron ore, the outlet of microsize grade iron ore and round roller sieve; Described iron ore thermal spalling process furnace furnace roof is provided with a plurality of described blast furnace gas burner nozzles; Described upper strata iron ore travelling belt group is positioned at the top of described iron ore thermal spalling process furnace, and is positioned at below described blast furnace gas burner nozzle; Described middle level iron ore travelling belt group is positioned at the middle part of described iron ore thermal spalling process furnace; Described lower floor iron ore travelling belt is positioned at the bottom of described iron ore thermal spalling process furnace; Described iron ore entrance is connected with the feed end of upper strata iron ore travelling belt group, the discharge end of described upper strata iron ore travelling belt group is connected with described coarse fraction iron ore outlet by described round roller sieve, the discharge end of described middle level iron ore travelling belt group is connected with described middle grade iron ore outlet by described round roller sieve, and the discharge end of described lower floor iron ore travelling belt is connected with the outlet of microsize grade iron ore.
Described iron ore thermal spalling process furnace is divided into three sections in the horizontal direction, is respectively preheating section, heating zone and explosion section; Described iron ore thermal spalling process furnace is divided into upper, middle and lower-ranking in the vertical direction.
Described upper strata iron ore travelling belt group is made of a plurality of iron ore travelling belts, and described a plurality of iron ore travelling belts are connected direction according to described preheating section, heating zone and explosion section and are connected successively by described round roller sieve with the form of distribution straggly.
Described middle level iron ore travelling belt group is made of a plurality of iron ore travelling belts, and described a plurality of iron ore travelling belts are connected direction according to described explosion section, heating zone and are connected successively by described round roller sieve with the form of distribution straggly with preheating section.
The device that improves the iron ore thermal decrepitation that the utility model provides, iron ore thermal spalling process furnace by step-by-step design can slow down moisture evaporation in iron ore, internal stresses release, the decomposition rate of crystal water and carbonate, reduce the generation of iron ore crackle in being subjected to thermal process, improve the thermal decrepitation of iron ore; Simultaneously the thermal spalling of iron ore reaction is occured in this device in advance, can significantly reduce the explosion efflorescence of iron ore in blast furnace, improve blast furnace middle and upper part ventilation property.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram that improves the iron ore thermal decrepitation that the utility model embodiment provides.
Embodiment
Below in conjunction with drawings and Examples, technical solutions of the utility model are further described.
Referring to Fig. 1, the utility model embodiment provides a kind of and has utilized three layers of syllogic thermal spalling stove pre-treatment iron ore to improve the device of iron ore thermal decrepitation, and this device comprises iron ore thermal spalling process furnace 1, blast furnace gas burner nozzle 2, iron ore entrance 3, upper strata iron ore travelling belt group, middle level iron ore travelling belt group, lower floor's iron ore travelling belt 13, coarse fraction iron ore outlet 5, middle grade iron ore outlet 4, the outlet 6 of microsize grade iron ore and round roller sieve; Iron ore thermal spalling process furnace 1 furnace roof is provided with a plurality of blast furnace gas burner nozzles 2; Upper strata iron ore travelling belt group is positioned at the top of iron ore thermal spalling process furnace 1, and is positioned at blast furnace gas burner nozzle 2 belows; Middle level iron ore travelling belt group is positioned at the middle part of iron ore thermal spalling process furnace 1; Lower floor's iron ore travelling belt 13 is positioned at the bottom of iron ore thermal spalling process furnace 1; Iron ore entrance 3 is connected with the feed end of upper strata iron ore travelling belt group, the discharge end of upper strata iron ore travelling belt group sieves 16 by round roller and is connected with coarse fraction iron ore outlet 5, the discharge end of middle level iron ore travelling belt group sieves 19 by round roller and is connected with middle grade iron ore outlet 4, and the discharge end of lower floor's iron ore travelling belt 13 is connected with microsize grade iron ore outlet 6.Coarse fraction iron ore in the present embodiment outlet 5 is used for discharging particle diameter〉iron ore of 20mm, it is 5-20mm that middle grade iron ore outlet 4 is used for discharging the 5-20mm(particle diameter) the grade iron ore, microsize grade iron ore outlet 6 is used for discharging the iron ores of particle diameter＜5mm.
Wherein, iron ore thermal spalling process furnace 1 is divided into three sections in the horizontal direction, is respectively preheating section, heating zone and explosion section.Heating temperature is progressively increased by preheating section, heating zone to explosion section, the temperature of preheating section, heating zone and explosion section is respectively 200 ℃, 400 ℃ and 700 ℃, preheating section is used for the evaporation of the natural moisture of iron ore and the preheating of iron ore, the thermal spalling reaction of iron ore mainly occurs in the explosion section, heating zone is the temperature buffer between preheating section and explosion section, is mainly used in the internal stress in the Iron Release ore.In concrete production practice, on the one hand the internal stress in iron ore is slowly discharged by zone heating, can reduce on the other hand the Natural Water volatilization in iron ore, the speed of crystal water, carbonate decomposition, thereby the generation and the efflorescence that reduce iron ore crackle in being subjected to thermal process are broken, improve the thermal decrepitation of iron ore.In addition, iron ore thermal spalling process furnace 1 is divided into upper, middle and lower-ranking in the vertical direction; The upper strata is particle diameter〉20mm iron ore layer, iron ore is subjected to thermal spalling at this layer, and breaking and Dusting occurs, and produces a certain amount of powder.In concrete production practice, in order to improve screening effect, reduce particle diameter＜5mm iron ore as far as possible and enter the negative impact that stove brings to blast furnace permeability, with the iron ore of particle diameter＜5mm of producing by the roller spacing be round roller sieve 14,15 prescreenings of 5mm to the middle layer, the round roller sieve 16 that the iron ore of particle diameter＜20mm is 20mm by the roller spacing is sieved to the middle layer; The middle layer is 5-20mm iron ore layer, and particle diameter＜5mm iron ore that will be wherein by the round roller sieve 17,18,19 that is 5mm by the roller spacing again in the middle layer of the iron ore under upper sieve is sieved on lower floor's iron ore travelling belt 13, as the sintering powdered iron ore.5-20mm and particle diameter〉20mm grade iron ore delivers to blast-furnace smelting by the outlet 4 of middle grade iron ore and coarse fraction iron ore outlet 5 respectively, realizes that the classification of iron ore enters stove.
Wherein, blast furnace gas burner nozzle 2 is arranged at the furnace roof position of iron ore thermal spalling process furnace 1, controls the upper strata temperature of iron ore thermal spalling process furnace 1 by regulating each section gas flow.The burner decoration form of the present embodiment makes the upper strata temperature of iron ore thermal spalling process furnace 1 high, is conducive to the upper strata iron ore and fully is subjected to thermal spalling; And lower floor's temperature is low, make iron ore from top to bottom in screening process temperature progressively reduce, be conducive to the release of iron ore built-in thermal stress.
As shown in Figure 1, upper strata iron ore travelling belt group consists of according to the direction of preheating section, heating zone and explosion section iron ore travelling belt 7, iron ore travelling belt 8 and the iron ore travelling belt 9 with distribution form straggly by 3, and iron ore travelling belt 7, iron ore travelling belt 8 and iron ore travelling belt 9 move according to preheating section, heating zone to explosion direction.The round roller sieve 14 that the discharge end of iron ore travelling belt 7 is 5mm by the roller spacing is connected with the feed end of iron ore travelling belt 8, the round roller sieve 15 that the discharge end of iron ore travelling belt 8 is 5mm by the roller spacing is connected with the feed end of iron ore travelling belt 9, and the discharge end of iron ore travelling belt 9 is that the round roller sieve 16 of 20mm is connected with coarse fraction iron ore outlet 5 by the roller spacing.
As shown in Figure 1, middle level iron ore travelling belt group consists of according to the direction of explosion section, heating zone and preheating section iron ore travelling belt 10, iron ore travelling belt 11 and the iron ore travelling belt 12 with distribution form straggly by 3, iron ore travelling belt 10, iron ore travelling belt 11 and iron ore travelling belt 12 move according to explosion section, heating zone to preheating section direction, the iron ore temperature progressively reduces, and is conducive to the release of iron ore built-in thermal stress.The round roller sieve 17 that the discharge end of iron ore travelling belt 10 is 5mm by the roller spacing is connected with the feed end of iron ore travelling belt 11, the round roller sieve 18 that the discharge end of iron ore travelling belt 11 is 5mm by the roller spacing is connected with the feed end of iron ore travelling belt 12, and the discharge end of iron ore travelling belt 12 is that the round roller sieve 19 of 5mm is connected with middle grade iron ore outlet 4 by the roller spacing.
the principle of work of the device that improves the iron ore thermal decrepitation that the utility model embodiment provides: blast furnace gas burner nozzle 2 is heated to respectively 200 ℃, 400 ℃ and 700 ℃ with preheating section, heating zone and the explosion section in iron ore thermal spalling process furnace 1, iron ore is entered the upper strata of iron ore thermal spalling process furnace 1 by iron ore entrance 3, enter the iron ore travelling belt 9 of explosion section by the iron ore travelling belt 7 of preheating section and the iron ore travelling belt 8 of heating zone, during this period due to the moisture evaporation, internal stresses release, the particle diameter that the decomposition of crystal water and carbonate etc. produce＜20mm small grain size iron ore and particle diameter＜5mm iron ore sieve 14 by round roller, 15 and 16 are sieved to the iron ore travelling belt 10 in middle level, on 11 and 12, particle diameter〉20mm grade iron ore discharges iron ore thermal spalling process furnace 1 by coarse fraction iron ore outlet 5, iron ore under upper sieve sieves 17,18 and 19 by round roller again particle diameter＜5mm iron ore is sieved to lower floor, be delivered to the outlet 6 of microsize grade iron ore for sintering by iron ore travelling belt 13,5-20mm grade iron ore is discharged iron ore thermal spalling process furnace 1 by middle grade iron ore outlet 4.
The device that improves the iron ore thermal decrepitation that the utility model embodiment provides, iron ore thermal spalling process furnace by step-by-step design can slow down moisture evaporation in iron ore, internal stresses release, the decomposition rate of crystal water and carbonate, reduce the generation of iron ore crackle in being subjected to thermal process, improve the thermal decrepitation of iron ore; Simultaneously the thermal spalling of iron ore reaction is occured in this device in advance, can significantly reduce the explosion efflorescence of iron ore in blast furnace, improve blast furnace middle and upper part ventilation property.In addition, the classification that divides design can realize iron ore of the layering screen of this device enters stove.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. device that improves the iron ore thermal decrepitation, it is characterized in that, comprise iron ore thermal spalling process furnace, blast furnace gas burner nozzle, iron ore entrance, upper strata iron ore travelling belt group, middle level iron ore travelling belt group, lower floor's iron ore travelling belt, the outlet of coarse fraction iron ore, the outlet of middle grade iron ore, the outlet of microsize grade iron ore and round roller sieve; Described iron ore thermal spalling process furnace furnace roof is provided with a plurality of described blast furnace gas burner nozzles; Described upper strata iron ore travelling belt group is positioned at the top of described iron ore thermal spalling process furnace, and is positioned at below described blast furnace gas burner nozzle; Described middle level iron ore travelling belt group is positioned at the middle part of described iron ore thermal spalling process furnace; Described lower floor iron ore travelling belt is positioned at the bottom of described iron ore thermal spalling process furnace; Described iron ore entrance is connected with the feed end of upper strata iron ore travelling belt group, the discharge end of described upper strata iron ore travelling belt group is connected with described coarse fraction iron ore outlet by described round roller sieve, the discharge end of described middle level iron ore travelling belt group is connected with described middle grade iron ore outlet by described round roller sieve, and the discharge end of described lower floor iron ore travelling belt is connected with the outlet of microsize grade iron ore.
2. the device that improves the iron ore thermal decrepitation as claimed in claim 1, is characterized in that, described iron ore thermal spalling process furnace is divided into three sections in the horizontal direction, is respectively preheating section, heating zone and explosion section; Described iron ore thermal spalling process furnace is divided into upper, middle and lower-ranking in the vertical direction.
3. the device that improves the iron ore thermal decrepitation as claimed in claim 2, it is characterized in that, described upper strata iron ore travelling belt group is made of a plurality of iron ore travelling belts, and described a plurality of iron ore travelling belts are connected direction according to described preheating section, heating zone and explosion section and are connected successively by described round roller sieve with the form of distribution straggly.
4. the device that improves the iron ore thermal decrepitation as claimed in claim 2, it is characterized in that, described middle level iron ore travelling belt group is made of a plurality of iron ore travelling belts, and described a plurality of iron ore travelling belts are connected direction according to described explosion section, heating zone and are connected successively by described round roller sieve with the form of distribution straggly with preheating section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613941 CN202945295U (en) | 2012-11-19 | 2012-11-19 | Device for improving thermal explosion property of iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220613941 CN202945295U (en) | 2012-11-19 | 2012-11-19 | Device for improving thermal explosion property of iron ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202945295U true CN202945295U (en) | 2013-05-22 |
Family
ID=48421002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220613941 Expired - Fee Related CN202945295U (en) | 2012-11-19 | 2012-11-19 | Device for improving thermal explosion property of iron ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202945295U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611488A (en) * | 2016-12-13 | 2018-10-02 | 鞍钢股份有限公司 | Pretreatment method of natural massive iron ore |
-
2012
- 2012-11-19 CN CN 201220613941 patent/CN202945295U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108611488A (en) * | 2016-12-13 | 2018-10-02 | 鞍钢股份有限公司 | Pretreatment method of natural massive iron ore |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106440810B (en) | A kind of sintering machine | |
| CN106556258A (en) | Sintering mine sensible heat retracting device and its using method | |
| CN205014851U (en) | Sintering deposit shows heat reclamation device | |
| CN101568656A (en) | Treatment of green pellets using microwave energy | |
| CN109776002A (en) | A kind of the suspension calcining activation system and method for Suitable clays mine tailing | |
| CN218884626U (en) | Coal gangue sintering material shaft furnace cooling device | |
| CN104131120B (en) | Improve the Burden distribution method of blast furnace of agglomerate utilising efficiency | |
| CN105112583B (en) | A kind of method for allocating State of Blast Furnace past raising coal combustion rate in injection coal into | |
| CN102689391A (en) | Aluminum silicate fiber collodion cotton and production method for highly processed product of aluminium silicate fiber collodion | |
| CN109437608A (en) | A kind of two-way wind built-in heat exchanger lime shaft kiln and its method for calcinating | |
| CN105861834B (en) | A kind of eddy flow Flash Smelting technique | |
| CN202945295U (en) | Device for improving thermal explosion property of iron ore | |
| CN102268533B (en) | Move horizontally-fixed-bed type Magnetization reductive roasting technique | |
| CN103205584B (en) | Production device and production method of manganese monoxide mineral powder | |
| CN108680034A (en) | The method for generating mixture online using sintering circular-cooler waste heat | |
| CN103043930B (en) | Method and equipment for producing cement and gathering CO2 by utilizing closed ring-shaped calcination furnace | |
| CN104313315A (en) | Sinter pre-granulation method for improving cooling efficiency of circular cooler | |
| CN107285651A (en) | A kind of active powder lime suspension calcining device | |
| CN214747299U (en) | Device for producing mineral admixture by using coal gangue | |
| CN102815876A (en) | Method for preparing quicklime by continuously calcining limestone in shaft kiln | |
| CN106381355B (en) | A kind of iron smelting method using high proportion South Africa Iron Ores | |
| CN106367585B (en) | A kind of system and method for rotary hearth furnace processing troilite | |
| CN114370757B (en) | Storage bin lump ore pretreatment system and lump ore pretreatment method | |
| CN102787193B (en) | Coking reduction smelting device | |
| CN113483554B (en) | Drying device and drying method for lump ore for blast furnace concentrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: SHOUGANG GROUP Co.,Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: SHOUGANG Corp. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20211119 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |