CN106186742A - Light calcined magnesia flaring suspension roasting device - Google Patents
Light calcined magnesia flaring suspension roasting device Download PDFInfo
- Publication number
- CN106186742A CN106186742A CN201610751734.2A CN201610751734A CN106186742A CN 106186742 A CN106186742 A CN 106186742A CN 201610751734 A CN201610751734 A CN 201610751734A CN 106186742 A CN106186742 A CN 106186742A
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- China
- Prior art keywords
- flaring
- conversion zone
- inlet pipe
- steam
- kiln body
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses a kind of light calcined magnesia flaring suspension roasting device, the bottom of kiln body is flaring conversion zone, top is stable crystalline section, the bottom of flaring conversion zone is provided with pre-steam material inlet pipe, pre-steam material inlet pipe is communicated in preheating material inlet pipe and preheated air inlet pipe, the top of stable crystalline section is provided with gas material and goes out pipe, gas material goes out pipe and is communicated in Conveyance device, the top of Conveyance device set steam go out pipe, bottom set thermal material go out pipe, the bottom of flaring conversion zone sets fuel nozzle, and fuel nozzle is communicated in the fuel inlet pipe through kiln body sidewall.The present invention changes that existing light calcined magnesia suspension roasting flow field is uneven and local eddy currents, the shortcoming of Product Activity low quality difference, preheating material mix in pre-steam material inlet pipe with preheated air after together with from the bottom of flaring conversion zone enter flaring conversion zone, the flaring conversion zone section of kiln body gradually expands along with the increase of gas, even flow field, gas material at the uniform velocity rises, uniformly, Product Activity is high, and quality is good for sintering.
Description
Technical field
The present invention relates to light calcined magnesia roasting kiln technical field.
Background technology
Magnesite belongs to country's grand strategy resource.China's magnesite reserves account for the 24% of world saving, occupy the world first
Position.Although China is magnesite resource and magnesian big producing country, but owing to blindness for many years is exploited, high-grade magnesite
Stone is the deficientest, and light calcined magnesia produces and remains in the original extensive mode of production, and manufacturing enterprise is simply equipped, and lacks technology
Standard, thermal regulation and rule of operation, the most by rule of thumb manual operation, labor intensity is big, and environmental pollution is serious, and product quality is not
Stable, added value of product is low, and resource can not get comprehensive utilization.The problem basic reason that China's magnesite industry exists is technology and dress
Standby backwardness, has become as the technical bottleneck of restriction China light calcined magnesia development.
China's light calcined magnesia produces equipment and lags far behind developed country, also lags far behind domestic aluminium oxide, cement
Deng other inorganic goods industries.China's light calcined magnesia production technology is original, continues to use traditional reflecting kiln always and produces.This instead
Penetrating kiln body little, yield poorly, annual production is less than 20,000 tons；Open production, energy consumption is big, pollutes the most serious；Lump material,
Solid and gas contrary, to movement, relies on steam baking material, and decomposition reaction velocity is slow, and raw outer burnt in product, surface overbaking loses
Activity, internal roasting does not the most thoroughly have activity, and Product Activity is low, of poor quality；Automaticity is low, produces original, grasps by rule of thumb
Making, labor intensity is big.
Aluminium oxide, cement etc. are dehydration and crystallization process without mechanical goods roasting, there is not burning problem.Unlike this, gently
Burned magnesium oxide roasting is chemical reaction process, and magnesium carbonate resolves into magnesium oxide and carbon dioxide, burning and underburnt all can cause oxygen
Change magnesium activity to reduce, even lose activity.In order to ensure Product Activity, it is necessary to assure roasting is uniform.Light calcined magnesia roasting
Journey produces great amount of carbon dioxide gas, causes suspension roasting flow field constantly to change, and produces flow field non-uniform phenomenon；Charging and
Air intake may upset suspension roasting flow field, produces local eddy currents.Suspension roasting flow field is uneven and local eddy currents all may cause
Roasting is uneven, causes some burning in product, some underburnt, has a strong impact on product quality.
Summary of the invention
Solved by the invention technical problem is that overcome that suspension roasting flow field of the prior art is uneven and local eddy currents,
The weak point of Product Activity low quality difference, and a kind of light calcined magnesia flaring suspension roasting device is provided,
The technical solution used in the present invention is light calcined magnesia roasting kiln suspension roasting device, including kiln body, kiln body
Bottom is flaring conversion zone, and the top of kiln body is stable crystalline section, and the bottom of flaring conversion zone is provided with pre-steam material inlet pipe, preheating
Gas material inlet pipe is communicated in preheating material inlet pipe and preheated air inlet pipe, and the top of stable crystalline section is provided with gas material and goes out pipe, and gas material goes out
Pipe is communicated in Conveyance device, and the top of Conveyance device sets steam and goes out pipe, and the bottom of Conveyance device sets thermal material
Going out pipe, the bottom of flaring conversion zone sets fuel nozzle, and fuel nozzle is communicated in the fuel inlet pipe through kiln body sidewall.
In flaring conversion zone, fuel and the oxygen combustion in air react generation heat, and mineral powder of magnesite is rising gas
The driving low suspension state of stream rises, and reaction carbon dioxide gas of constantly decomposing, gas volume constantly increases, flaring
Conversion zone section the most gradually expands；When material rises to the top of flaring conversion zone, decomposition reaction terminates, and material is with gas
Stream enters stable crystalline section together；In stable crystalline section, gas volume no longer increases, and stable crystalline section section is constant, material with
Air-flow the most at the uniform velocity rises and crystallizes；When material rises to stable crystalline section top, crystallization completes, and material is with air-flow one
Rise by gas material go out pipe enter Conveyance device carry out Conveyance.
The invention has the beneficial effects as follows, change that existing light calcined magnesia suspension roasting flow field is uneven and local eddy currents, product
The shortcoming of product activity low quality difference, the flaring conversion zone section of kiln body gradually expands along with the increase of gas, even flow field, gas
Material at the uniform velocity rises, and uniformly, Product Activity is high, and quality is good for sintering.
Accompanying drawing explanation
Fig. 1 is light calcined magnesia roasting kiln suspension roasting device schematic diagram.
Being labeled as in figure: 1-kiln body, 11-flaring conversion zone, 12-stable crystalline section, 2-pre-steam material inlet pipe, 21-preheats
Material inlet pipe, 22-preheated air inlet pipe, 3-gas material goes out pipe, 4-Conveyance device, and 41-steam goes out pipe, and 42-thermal material goes out pipe,
5-fuel nozzle, 51-fuel inlet pipe.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
The light calcined magnesia flaring suspension roasting device of the present invention, including kiln body 1, the bottom of described kiln body 1 is that flaring is anti-
The section of answering 11, the top of kiln body 1 is stable crystalline section 12, and the bottom of flaring conversion zone 11 is provided with pre-steam material inlet pipe 2, pre-steam material
Inlet pipe 2 is communicated in preheating material inlet pipe 21 and preheated air inlet pipe 22, and the top of stable crystalline section 12 is provided with gas material and goes out pipe 3, gas
Expecting that pipe 3 is communicated in Conveyance device 4, the top of Conveyance device 4 sets steam and goes out pipe 41, the end of Conveyance device 4
Portion sets thermal material and goes out pipe 42, and the bottom of flaring conversion zone 11 sets fuel nozzle 5, and fuel nozzle 5 is communicated in through kiln body 1 sidewall
Fuel inlet pipe 51.
The mineral powder of magnesite of preheating enters preheating by preheating material inlet pipe 21, preheated air by preheated air inlet pipe 22
Gas material inlet pipe 2 mixes, and the gaseous mixture material in pre-steam material inlet pipe 2 enters flaring conversion zone 11 from the bottom of flaring conversion zone 11；
Natural gas or the fuel such as coal gas or heavy oil deliver to fuel nozzle 5 by fuel inlet pipe 51, and it is anti-to be ejected into flaring by fuel nozzle 5
The section of answering 11；In flaring conversion zone 11, fuel produces heat with the oxygen combustion in air, keeps mineral powder of magnesite to decompose
The temperature of reaction, mineral powder of magnesite is in suspended state and with ramping up under the driving of ascending air, and mineral powder of magnesite is rising
During constantly decompose reaction, continuous carbon dioxide gas, gas volume constantly increases, flaring conversion zone 11 section
The most gradually expand to adapt to the continuous increase of gas volume；When material rises to the top of flaring conversion zone 11, decompose
Reaction terminates, and material enters stable crystalline section 12 with air-flow；In stable crystalline section 12, gas volume no longer increases, stable
The section of crystallized region 12 is constant, and material at the uniform velocity rises together with air-flow and crystallizes；When material rises to stable crystalline section 12
During top, crystallization completes, and material goes out pipe 3 with air-flow by gas material and enters Conveyance device 4 and carry out Conveyance, separates
Steam out goes out pipe 41 by steam and enters material pre-heating system, and the thermal material separated goes out pipe 42 by thermal material and enters
Material cooling system.In whole roasting process, material is suspended state, and with steam with ramping up, even flow field, gas material is at the uniform velocity gone up
Rising, sintering is uniformly, it is achieved that light calcined magnesia extensive, continuous, quickly produce, apparatus structure is simple and convenient to operate, product
Activity is high, quality is good.
Below in conjunction with embodiment, invention is further described.Accompanying drawing 1 is embodiment schematic diagram, in the present embodiment, and preheating
Mineral powder of magnesite enter pre-steam material inlet pipe 2 by preheated air inlet pipe 22 mix by preheating material inlet pipe 21, preheated air
Closing, gaseous mixture material enters flaring conversion zone 11 bottom kiln body；Fuel delivers to fuel nozzle 5 by fuel inlet pipe 51, and by firing
Material nozzle 5 is ejected into flaring conversion zone 11；In flaring conversion zone 11, fuel and the oxygen combustion in air react generation heat
Amount, mineral powder of magnesite rises and decomposes reaction together with air-flow；When material rises to the top of flaring conversion zone 11, point
Solution reaction terminates, and material enters stable crystalline section 12 with air-flow；In stable crystalline section 12, material is at the uniform velocity gone up together with air-flow
Rise and crystallize；When material rises to stable crystalline section 12 top, crystallization completes, and material is gone out by gas material with air-flow
Pipe 3 enters Conveyance device 4 and carries out Conveyance, the steam separated by steam go out pipe 41 enter material preheating system
System, the thermal material separated goes out pipe 42 by thermal material and enters material cooling system.The present embodiment produces light calcined magnesia 15 per year
Ten thousand tons, have the advantage that simultaneously
1. raw material is powder giobertite, granularity 120-200 mesh, and granularity is little, and roasting time is short, and Product Activity is high；
2. material is that suspended state rises together with steam, and the flaring conversion zone that section gradually expands has adapted to giobertite
The gas volume that powder decomposition reaction release carbon dioxide causes constantly increases, even flow field, and gas material at the uniform velocity rises, and sintering is uniform,
Product Activity is high；
3. apparatus structure is simple and convenient to operate.
Claims (3)
1. light calcined magnesia flaring suspension roasting device, including kiln body (1), it is characterised in that: the bottom of described kiln body (1) is gradually
Expanding conversion zone (11), the top of kiln body (1) is stable crystalline section (12), and the bottom of flaring conversion zone (11) is provided with pre-steam material and enters
Pipe (2), pre-steam material inlet pipe (2) is communicated in preheating material inlet pipe (21) and preheated air inlet pipe (22), stable crystalline section (12)
Top be provided with gas material go out pipe (3), gas material go out pipe (3) be communicated in Conveyance device (4), the top of Conveyance device (4)
If steam goes out pipe (41), the bottom of Conveyance device (4) sets thermal material and goes out pipe (42), and the bottom of flaring conversion zone (11) sets combustion
Material nozzle (5), fuel nozzle (5) is communicated in the fuel inlet pipe (51) through kiln body (1) sidewall.
2. light calcined magnesia flaring suspension roasting device as claimed in claim 1, it is characterised in that: kiln body (1) is anti-by flaring
The section of answering (11), stable crystalline section (12) form, and the cross section of flaring conversion zone (11) the most gradually expands, stable crystalline section
Cross section constant.
3. light calcined magnesia flaring suspension roasting device as claimed in claim 1, it is characterised in that: preheating material and preheating sky
Gas enters flaring conversion zone (11) in pre-steam material inlet pipe (2) together from the bottom of flaring conversion zone (11) after mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610751734.2A CN106186742B (en) | 2016-08-29 | 2016-08-29 | Light calcined magnesia flaring suspension roasting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610751734.2A CN106186742B (en) | 2016-08-29 | 2016-08-29 | Light calcined magnesia flaring suspension roasting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106186742A true CN106186742A (en) | 2016-12-07 |
| CN106186742B CN106186742B (en) | 2018-04-13 |
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| CN201610751734.2A Active CN106186742B (en) | 2016-08-29 | 2016-08-29 | Light calcined magnesia flaring suspension roasting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111792855A (en) * | 2020-08-20 | 2020-10-20 | 辽宁博仕科技股份有限公司 | Straight cylinder type light-burned magnesium oxide suspension roasting device |
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| CN102674408A (en) * | 2012-05-15 | 2012-09-19 | 海城市华圣耐火材料有限公司 | Continuous production method of undercalcined magnesia kiln |
| CN103435277A (en) * | 2013-08-23 | 2013-12-11 | 北京科太亚洲生态科技有限公司 | Internal gas burning shaft kiln and method for producing light burned magnesia |
| CN104591553A (en) * | 2014-12-23 | 2015-05-06 | 广西贵糖（集团）股份有限公司 | Energy-saving and pollution-reducing method for lime firing process |
| CN205133417U (en) * | 2015-11-18 | 2016-04-06 | 海城市恒镁科技有限公司 | Stove of light -burned magnesium oxide of continuous calcination of magnesite pelletizing |
| CN205974282U (en) * | 2016-08-29 | 2017-02-22 | 辽宁信威环保科技有限公司 | Light -burned magnesium oxide flaring suspension roasting device |
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2016
- 2016-08-29 CN CN201610751734.2A patent/CN106186742B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1796324A (en) * | 2004-12-29 | 2006-07-05 | 清华大学 | Method for preparing slaked lime in mode of circulating fluid bed and equipment |
| CN201027172Y (en) * | 2007-04-19 | 2008-02-27 | 王元生 | Magnesium carbonate suspending sorting kiln |
| CN102674408A (en) * | 2012-05-15 | 2012-09-19 | 海城市华圣耐火材料有限公司 | Continuous production method of undercalcined magnesia kiln |
| CN103435277A (en) * | 2013-08-23 | 2013-12-11 | 北京科太亚洲生态科技有限公司 | Internal gas burning shaft kiln and method for producing light burned magnesia |
| CN104591553A (en) * | 2014-12-23 | 2015-05-06 | 广西贵糖（集团）股份有限公司 | Energy-saving and pollution-reducing method for lime firing process |
| CN205133417U (en) * | 2015-11-18 | 2016-04-06 | 海城市恒镁科技有限公司 | Stove of light -burned magnesium oxide of continuous calcination of magnesite pelletizing |
| CN205974282U (en) * | 2016-08-29 | 2017-02-22 | 辽宁信威环保科技有限公司 | Light -burned magnesium oxide flaring suspension roasting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111792855A (en) * | 2020-08-20 | 2020-10-20 | 辽宁博仕科技股份有限公司 | Straight cylinder type light-burned magnesium oxide suspension roasting device |
| CN111792855B (en) * | 2020-08-20 | 2024-01-30 | 辽宁博仕科技股份有限公司 | Straight barrel type light-burned magnesia suspension roasting device |
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| Publication number | Publication date |
|---|---|
| CN106186742B (en) | 2018-04-13 |
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| CB03 | Change of inventor or designer information |
Inventor after: Shi Shuwei Inventor after: Qu Dianli Inventor after: Yin Geyi Inventor after: Guo Yuxiang Inventor after: Sang Hong Inventor after: Sun Wenjing Inventor after: Cai Youjuan Inventor after: Chen Fuli Inventor after: Gang Zhanku Inventor before: Chen Fuli Inventor before: Gang Zhanku Inventor before: Shi Shuwei |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180320 Address after: No. 185, Qianshan Middle Road, Anshan high tech Zone, Liaoning Province Applicant after: Liaoning Science and Technology Univ. Applicant after: Liaoning Xinwei Environmental Protection Technology Co. Ltd. Applicant after: Liaoning Fenghua Industrial Co., Ltd. Applicant after: Dashiqiao Xinwei Refractory Material Co.,Ltd. Address before: 115105, Yingkou, Liaoning province Dashiqiao City Tuen Mun Town, Tong Village Applicant before: Liaoning Xinwei Environmental Protection Technology Co. Ltd. |
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