CN108373274A - A kind of fast energy-saving preparation method of lime - Google Patents
A kind of fast energy-saving preparation method of lime Download PDFInfo
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- CN108373274A CN108373274A CN201810521881.XA CN201810521881A CN108373274A CN 108373274 A CN108373274 A CN 108373274A CN 201810521881 A CN201810521881 A CN 201810521881A CN 108373274 A CN108373274 A CN 108373274A
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- Prior art keywords
- lime
- idiosome
- lime stone
- prepared
- preparation
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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
- C04B2/104—Ingredients added before or during the burning process
Abstract
The invention discloses a kind of fast energy-saving preparation methods of lime, when purpose is to solve to prepare lime using existing method, it is slow to fire speed, low output, the utilization rate of thermal energy is relatively low, the problem of energy expenditure is larger, and mass energy is wasted, this method include preparing limestone fines, preparing additive, prepare lime stone idiosome, fire four steps.It compared with existing lime method for cooking, can save for 30% or more time using the present invention, there is significant economy and social value, for reducing energy consumption, improve the performance of enterprises, there is remarkable effect.Meanwhile prepared activity of lime higher, product quality are significantly improved.
Description
Technical field
The present invention relates to chemical industry and field of smelting, the fast energy-saving preparation method of especially a kind of lime.
Background technology
The main component of lime stone is calcium carbonate, and lime can be directly fired into using lime stone.The main component of lime
It for calcium oxide, has been widely used in the industries such as plastics, coating, papermaking, steel-making, such as in steel-making, lime stone is added
Silica in ore can be changed into clinker, lime has become one of essential raw material of steel-making simultaneously.
Currently, when prior art lime calcining stone, the sequence according to one layer of lime stone, one layer of coal by lime stone and coal is needed
It is fitted into earth kiln, then carries out high-temperature calcination, up to lime after calcining.However, when preparing lime using this method, speed is fired
Slowly, the utilization rate of low output, thermal energy is relatively low, and energy expenditure is larger, and mass energy is wasted.Since lime has a wide range of application, city
Field demand is big, thus how to reduce and prepare the energy consumption of lime as people's problem in the urgent need to address.Especially with this
When the lime steel-making of technique productions, content of sulfur dioxide contained in lime is excessively high, and product quality is caused to reduce, lime consumption compared with
The production cost of height, enterprise is high, not only causes the serious waste of resource, but also larger dirt is also resulted in environment
Dye.
Invention content
The goal of the invention of the present invention is：In view of the above problems, a kind of fast energy-saving preparation side of lime is provided
Method.When the present invention can effectively solve the problem that existing method lime calcining, the problem that speed is slow, energy consumption is big is fired.It is burnt with existing lime
Method processed is compared, and 70% or more energy can be saved using the present invention, has significant economy and social value, for reducing
Energy consumption improves the performance of enterprises, has remarkable effect.Meanwhile prepared activity of lime higher, product quality are shown
It writes and is promoted.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of fast energy-saving preparation method of lime, which is characterized in that include the following steps：
(1) limestone fines are prepared：Lime stone is crushed into powder, limestone fines are obtained, it is spare；
(2) additive is prepared：Coal dust, binder and water are taken respectively, and coal dust, binder, water are uniformly mixed to get addition
Agent, the coal dust, binder and water mass ratio be 5：3-4：7 or 2.5：0：4；
(3) lime stone idiosome is prepared：Limestone fines prepared by step (1) are stirred with additive prepared by step (2)
It is uniformly mixed, obtains mixture, mixture is sent into moulding press and is pressed into lime stone idiosome, the limestone fines and addition
The mass ratio of agent is 8-20：0.5-1.5 is provided with through-hole on the lime stone idiosome；
(4) it fires：The lime stone idiosome prepared in step (3) is sent into kiln body and is fired, firing temperature
For 920-1180 DEG C to get product, the volume of the lime stone idiosome accounts for the 70%-95% of kiln body volume.
In the step (1), lime stone is crushed, obtains limestone fines, the grain size of limestone fines is 0.01-3mm；
In the step (2), binder is one or more in clay, glass powder, calcium hydroxide；
In the step (3), lime stone idiosome is cuboid or cylinder；
In the step (3), lime stone idiosome is square；
In the step (4), first the lime stone idiosome prepared in step (3) is sent into kiln body and is preheated to 600-800 DEG C,
920-1180 DEG C is again heated to be fired to get product.
In the step (4), the kiln body is one kind in shaft kiln, annular kiln, tunnel oven, rotary kiln.
When for existing method lime calcining, speed is slow, energy consumption is big problem is fired, the present invention provides a kind of the fast of lime
The energy saving preparation method of speed, this method include preparing limestone fines, preparing additive, prepare lime stone idiosome, fire four steps
Suddenly.When being fired by this method, lime stone green structure is stablized, medium density, well-ventilated when burning, coal dust combustion contained therein
It burns down entirely, the efficiency of combustion of lime stone and coal dust reaches optimum state.In this method, every kilogram of lime stone only needs 300-400 big
Card, firing temperature can reach 920-1180 DEG C.Compared with existing lime method for cooking, 70% or more can be saved using the present invention
Energy, have significant economy and social value, for reduce energy consumption, improve the performance of enterprises, have remarkable effect.Together
When, prepared activity of lime higher, product quality is significantly improved.
Preferably, in the step (1), it is 0.01-3mm that agstone, which is broken to grain size, obtains limestone fines.It crushes
At fine powder, be conducive to the compression moulding of lime stone idiosome, make inside lime stone idiosome more uniformly, to improve the biography of lime stone idiosome
The thermal efficiency shortens the firing time of lime.Meanwhile the present invention crushes lime stone, can be convenient for the purification of lime stone raw ore, drop
The low requirement for firing high-grade lime to material quality.Using the present invention, can using the waste material in stone factory production process as
Raw material improves the utilization ratio of resource.
In the step (2), in mass ratio 5：3-4：7 or 2.5：0：4 weigh coal dust, binder and water respectively, by coal dust,
Binder, water are uniformly mixed to get additive.Wherein, binder is one or more in clay, glass powder, calcium hydroxide.Shen
It asks someone to find by long felt, in mass ratio 5：3-4：7 weigh coal dust, binder and water and mass ratio 2.5：4 weigh coal
Powder, water prepare additive, and finally obtained lime, and required energy consumption is relatively low, and the utilization rate of the energy is higher.
In step (3), limestone fines and additive are uniformly mixed, and are pressed into lime stone idiosome, lime stone
Idiosome is cuboid or cylinder.The mass ratio of limestone fines and additive is 8-20：0.5-1.5 is set on lime stone idiosome
It is equipped with several through-holes., can be as needed when lime stone idiosome is cuboid, respectively on three groups of corresponding surfaces of cuboid
Through-hole is set, through-hole can be set on one group of corresponding surface, or corresponding through-hole is arranged on two groups, three groups of corresponding surfaces.
In step (4), lime stone idiosome is sent into kiln body and is fired, firing temperature is 920-1180 DEG C to get product, stone
The volume of lime stone idiosome accounts for the 70%-95% of kiln body volume, and kiln body can be one in shaft kiln, annular kiln, tunnel oven, rotary kiln
Kind.Preferably, in step (4), first lime stone idiosome can be sent into kiln body and be preheated to 600-800 DEG C, be again heated to
920-1180 DEG C is fired.Due to the firing speed of the present invention, the kiln discharge speed of lime, it is thus possible to utilize burning
The preheating of lime processed preheats lime stone idiosome, can not only effectively reduce energy consumption, and carry to product quality
Height also has certain help.
The present invention has carried out major tuneup to conventional limestone burning process, and prepared lime stone idiosome has good
It is more than 70% sulfur dioxide in gas permeability, raw material limestone and coal dust can together be discharged in company with the gas that burning generates,
In obtained product, for sulfur content well below the lime of produced in conventional processes, product density is relatively low, high-quality.Meanwhile applying
For people in practice, it has been found that since the lime product density prepared by the present invention is low, stomata quantity contained therein is more, activity is strong, contains
Sulfur content is low, when being applied to STEELMAKING PRODUCTION, can improve temperature when steel-making, improve slag discharge efficiency, reduce lime consumption, carry
The quality of high product steel reduces STEELMAKING PRODUCTION cost, reduces the wasting of resources and the pollution to environment.Work is fired with conventional limestone
Skill is compared, and 70% or more energy consumption can be reduced using the present invention, meanwhile, the lime stone of common grade also may be used using the present invention
Burning out the fat lime of 95% or more calcic, the waste material of stone field can also burn out the fat lime of calcic 85%, thus, this hair
It is bright for reduce energy consumption, production cost, improve lime quality tool significance.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
.
Embodiment one
100kg lime stones are taken, are crushed into powder, obtain limestone fines, the grain size of limestone fines is 0.01-1mm, spare.
5kg coal dusts, 8kg water are taken respectively, and coal dust, water are uniformly mixed to get additive.
Above-mentioned limestone fines are obtained into mixture, then mixture is sent with additive using mechanically or manually stirring evenly
Enter in press and suppress, obtains lime stone idiosome.Lime stone idiosome is cuboid, is provided on one group of parallel surface of lime stone idiosome
One group of through-hole.
The lime stone idiosome of preparation is sent into shaft kiln and is fired, firing temperature is 1100 DEG C to get 60kg lime, wherein stone
The volume of lime stone idiosome accounts for the 80% of kiln body volume.
Entire sintering procedure is about 2h, and the firing time is effectively shortened.Meanwhile relative to conventional method, processing processing
100kg lime needs 50kg coal facies ratios, and the dosage of effectively save coal is capable of using the present invention, significantly reduces production cost and energy
Consumption.
Embodiment two
100kg lime stones are taken, are crushed into powder, obtain limestone fines, the grain size of limestone fines is 0.01-3mm, spare.
5kg coal dusts, 8kg water are taken respectively, and coal dust, water are uniformly mixed to get additive.
Above-mentioned limestone fines are obtained into mixture, then mixture is sent with additive using mechanically or manually stirring evenly
Enter in press and suppress, obtains lime stone idiosome.Lime stone idiosome is cylinder, and the axial direction of cylinder is provided with through-hole.
First by the lime stone idiosome of preparation feeding annular kiln be preheated to 650 DEG C, be again heated to 950 DEG C be fired to get
65kg lime, the volume of wherein lime stone idiosome account for the 85% of kiln body volume.
Entire sintering procedure is about 2.1h, and the firing time is effectively shortened.Meanwhile relative to conventional method, processing
100kg lime needs 50kg coal facies ratios, and the dosage of effectively save coal is capable of using the present invention, significantly reduces production cost and energy
Consumption.
Embodiment three
100kg lime stones are taken, are crushed into powder, obtain limestone fines, the grain size of limestone fines is 0.01-2mm, spare.
5kg coal dusts, 3.5kg clays, 7kg water are taken respectively, and coal dust, clay, water are uniformly mixed to get additive.
100kg limestone fines, 10kg additives are taken, limestone fines and additive are equal using mechanically or manually stirring
It is even, mixture is obtained, then mixture is sent into press and is suppressed, obtains lime stone idiosome.Lime stone idiosome is cylinder, cylinder
Axial direction be provided with through-hole.
The lime stone idiosome of preparation feeding tunnel oven is first preheated to 550-600 DEG C, is again heated to 1000-1050 DEG C of progress
It fires to get 64kg lime, the volume of wherein lime stone idiosome accounts for the 92% of kiln body volume.
Entire sintering procedure is about 1h45min, and the firing time is significantly shorter than conventional method.Meanwhile relative to conventional method,
100kg lime is processed, 50kg coal facies ratios are needed, the dosage of effectively save coal is capable of using the present invention, significantly reduces production cost
And energy consumption.
Example IV
100kg lime stones are taken, are crushed into powder, limestone fines are obtained, it is spare.Take respectively 5kg coal dusts, 4kg calcium hydroxides,
Coal dust, calcium hydroxide, water are uniformly mixed to get additive by 7kg water.
100kg limestone fines, 17kg additives are taken, limestone fines and additive are equal using mechanically or manually stirring
It is even, mixture is obtained, then mixture is sent into press and is suppressed, obtains lime stone idiosome.Lime stone idiosome is cylinder, cylinder
Axial direction be provided with through-hole.
The lime stone idiosome of preparation feeding tunnel oven is first preheated to 700-800 DEG C, is again heated to 1150-1180 DEG C of progress
It fires to get 67kg lime, the volume of wherein lime stone idiosome accounts for the 92% of kiln body volume.
Entire sintering procedure is about 2h, and the firing time is significantly shorter than conventional method.Meanwhile it relative to conventional method, using
The present invention is capable of the dosage of effectively save coal, significantly reduces production cost and energy consumption.
Embodiment five
100kg lime stones are taken, are crushed into powder, limestone fines are obtained, it is spare.Take respectively 5kg coal dusts, 3.5kg glass powders,
Coal dust, calcium hydroxide, water are uniformly mixed to get additive by 7kg water.
100kg limestone fines, 5kg additives are taken, limestone fines and additive are equal using mechanically or manually stirring
It is even, mixture is obtained, then mixture is sent into press and is suppressed, obtains lime stone idiosome.Lime stone idiosome is square, lime stone
It is respectively arranged with through-hole on three groups of parallel surfaces of idiosome.
The lime stone idiosome of preparation feeding tunnel oven is first preheated to 650-750 DEG C, is again heated to 1100-1120 DEG C of progress
It fires to get 64.5kg lime, the volume of wherein lime stone idiosome accounts for the 88% of kiln body volume.
Entire sintering procedure is about 2.2h, and the firing time is significantly shorter than conventional method.Meanwhile it relative to conventional method, adopting
It is capable of the dosage of effectively save coal with the present invention, significantly reduces production cost and energy consumption.
Claims (7)
1. a kind of fast energy-saving preparation method of lime, which is characterized in that include the following steps：
(1) limestone fines are prepared：Lime stone is crushed into powder, limestone fines are obtained, it is spare；
(2) additive is prepared：Coal dust, binder and water are taken respectively, and coal dust, binder, water are uniformly mixed to get additive,
The mass ratio of the coal dust, binder and water is 5：3-4：7 or 2.5：0：4；
(3) lime stone idiosome is prepared：The additive that limestone fines prepared by step (1) are prepared with step (2) is stirred
Uniformly, mixture is obtained, mixture is sent into moulding press and is pressed into lime stone idiosome, the limestone fines and additive
Mass ratio is 8-20：0.5-1.5 is provided with through-hole on the lime stone idiosome；
(4) it fires：The lime stone idiosome prepared in step (3) is sent into kiln body and is fired, firing temperature is 920-1180 DEG C, i.e.,
Product is obtained, the volume of the lime stone idiosome accounts for the 70%-95% of kiln body volume.
2. lime according to claim 1 and preparation method thereof, which is characterized in that in the step (1), by agstone
It is broken, limestone fines are obtained, the grain size of limestone fines is 0.01-3mm.
3. lime according to claim 1 and preparation method thereof, which is characterized in that in the step (2), binder is viscous
It is one or more in soil, glass powder, calcium hydroxide.
4. according to any lime and preparation method thereof of claim 1-3, which is characterized in that in the step (3), lime
Stone idiosome is cuboid or cylinder.
5. lime according to claim 4 and preparation method thereof, which is characterized in that in the step (3), lime stone idiosome
For square.
6. the lime and preparation method thereof according to claim 1-5, which is characterized in that in the step (4), first by step
(3) the lime stone idiosome prepared in is sent into kiln body and is preheated to 600-800 DEG C, is again heated to 920-1180 DEG C and is fired, i.e.,
Obtain product.
7. the lime and preparation method thereof according to claim 1-5, which is characterized in that in the step (4), the kiln body
For one kind in shaft kiln, annular kiln, tunnel oven, rotary kiln.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810521881.XA CN108373274A (en) | 2018-05-28 | 2018-05-28 | A kind of fast energy-saving preparation method of lime |
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| CN201810521881.XA CN108373274A (en) | 2018-05-28 | 2018-05-28 | A kind of fast energy-saving preparation method of lime |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109320104A (en) * | 2018-11-14 | 2019-02-12 | 遵义古匡坝建材有限责任公司 | A kind of energy-efficient production technology and its production method of quick lime |
| CN109320105A (en) * | 2018-11-14 | 2019-02-12 | 遵义古匡坝建材有限责任公司 | A kind of fast energy-saving preparation method of limestone fines production lime |
| CN110128035A (en) * | 2019-05-23 | 2019-08-16 | 江苏华冶钙业有限公司 | High-purity calcium oxide preparation process and its Preparation equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073204A (en) * | 2013-02-19 | 2013-05-01 | 唐杰 | Energy-saving preparation method for calcium oxide |
-
2018
- 2018-05-28 CN CN201810521881.XA patent/CN108373274A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073204A (en) * | 2013-02-19 | 2013-05-01 | 唐杰 | Energy-saving preparation method for calcium oxide |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109320104A (en) * | 2018-11-14 | 2019-02-12 | 遵义古匡坝建材有限责任公司 | A kind of energy-efficient production technology and its production method of quick lime |
| CN109320105A (en) * | 2018-11-14 | 2019-02-12 | 遵义古匡坝建材有限责任公司 | A kind of fast energy-saving preparation method of limestone fines production lime |
| CN110128035A (en) * | 2019-05-23 | 2019-08-16 | 江苏华冶钙业有限公司 | High-purity calcium oxide preparation process and its Preparation equipment |
| CN110128035B (en) * | 2019-05-23 | 2021-07-16 | 江苏华冶钙业有限公司 | Preparation process and preparation equipment of high-purity calcium oxide |
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Application publication date: 20180807 |