CN109877144A - The cement calcination raw material and its preparation process of a kind of alternative traditional quick lime and application - Google Patents
The cement calcination raw material and its preparation process of a kind of alternative traditional quick lime and application Download PDFInfo
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- CN109877144A CN109877144A CN201910304716.3A CN201910304716A CN109877144A CN 109877144 A CN109877144 A CN 109877144A CN 201910304716 A CN201910304716 A CN 201910304716A CN 109877144 A CN109877144 A CN 109877144A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The invention belongs to environmental technology field, cement calcination raw material and its preparation process and the application of a kind of alternative traditional quick lime are provided.The preparation process includes: (1) sub-material: carbonato resolution ratio be 90-95% high-temperature cement calcination raw material enter kiln before, extract 1-10% as standby material；(2) cooling: standby material first passes through cooling cyclone and carries out air to be cooled to temperature being 720-760 DEG C；Standby material, which subsequently enters powder flow heat regenerator, to carry out being water-cooled to temperature and obtains cement calcination raw material less than 120 DEG C；(3) stock up: cement calcination raw material then pass through transportation system and enter cement calcination raw material silo, spare.The preparation process takes the mode of similar formula of hitchhiking to obtain cement calcination raw material in cement production process；Preparation is convenient, and cost is relatively low.The alternative traditional quick lime of the cement calcination raw material is applied in the processing of pollutants such as acid soil, acid waste water, acid waste residue.
Description
Technical field
The invention belongs to environmental technology fields, specifically, the cement calcination for being related to a kind of alternative traditional quick lime is raw
Material and its preparation process and application.
Background technique
Since reform and opening-up, the development model of economic thick growth form brings great challenge, the warp of recent decades to environment
Ji development has paid very big cost to environment, must focus on the protection to ecological environment while developing the economy.Currently, China's ring
It is soil pollution, water pollution, solid waste pollution and atmosphere pollution etc. that classification is polluted in border.Wherein China is contained greatly
Amount acid soil needs to administer.Non-ferrous metal picks up in smelting and sulphuric acid process and has also discharged a large amount of acid waste waters, wherein containing
Poisonous and harmful heavy metallic ion causes serious pollution to water resource environment.In addition, non-ferrous metal discharges during picking up smelting
A large amount of acidity industrial residues, cause destruction to surrounding soil, water body and atmosphere.Above-mentioned a large amount of acid soil, spent acidic
Water, acid waste residue processing disposition are the key that current environmental pollution improvements, China.
The pollutants such as the acid soil of processing disposition both at home and abroad, acid waste water, acid waste residue at present, mainly use quick lime.
For example, number of patent application: CN201810725896.8 has been invented a kind of for handling the stabilisation of heavy-metal composite pollution soil
Medicament and method, the pH adjusting agent used in the stabilizer is quick lime.Number of patent application: CN201810307819.0, hair
One kind is illustrated for polluted bed mud heavy metals immobilization stabilizer and preparation method thereof, includes 18-25 parts of life stone in the stabilizer
Ash.Number of patent application: CN201810994511.8 has invented a kind of device systems for quicklime slaking.Number of patent application:
CN201310260888.8, a kind of method of harmless treatment electrolytic manganese residues, the major pharmaceutical agent of the harmless treatment are stone of making a living
Ash.In addition, quick lime is in addition to that can neutralize acid waste water, heavy metal ion in stable curing waste water and industrial residue, additionally it is possible to
As modifier modification industrial solid castoff, improves it and use activity.For example, number of patent application: CN201810051193.1,
Using electrolytic manganese residues as retarder prepare concrete method and concrete prepared therefrom, the modifying agent used in the patent is i.e.
For quick lime.Although quick lime is as industrially common alkaline material for handling disposition convention acidic pollutant.But due to life
The scale economy advantage of lime manufacturing is lower than cement industry, its manufacturing cost is caused to be in a high position.In addition, China's acid soil
Earth contaminated area is big, nonferrous smelting industry acid waste water containing heavy metal discharge amount is big, commercial acid slag and tailing heap storage are big,
Lead to the statuses such as quick lime dosage is big, treatment effeciency is low, higher cost.Therefore, it is badly in need of finding a kind of inexpensive, efficient, easy system
The novel alkaline material of standby and alternative traditional quick lime.
Summary of the invention
For deficiency above-mentioned in the prior art, the first object of the present invention is to provide a kind of alternative traditional quick lime
Cement calcination raw material preparation process, which takes under the premise of not influencing clinker main process and quality
A kind of clinker intermediate product, i.e. cement calcination raw material is prepared in the mode of similar formula of hitchhiking；Compared to the raw stone of tradition
The preparation of ash, the cement calcination raw material is convenient, and cost is relatively low.
For deficiency above-mentioned in the prior art, the second object of the present invention is to provide a kind of alternative traditional quick lime
Cement calcination raw material, cost is relatively low for the cement calcination raw material, it is alternative tradition quick lime be applied to acid soil, spent acidic
In the processing disposition of the pollutants such as water, acid waste residue.
For deficiency above-mentioned in the prior art, the third object of the present invention is to provide a kind of alternative traditional quick lime
Cement calcination raw material applied in environmental pollution improvement, and excellent regulation effect can be obtained.
In order to achieve the above object, the solution that the present invention uses is:
A kind of preparation process of the cement calcination raw material of alternative traditional quick lime, comprising: (1) sub-material: in contained carbonic acid
The resolution ratio of salt is before the high-temperature cement calcination raw material of 90-95% enter kiln, and the 1-10% for extracting high-temperature cement calcination raw material amount makees
For standby material；(2) cooling: standby material first passes through cooling cyclone and carries out the spare material temperature that air is cooling, and cooling cyclone exports
Degree is 720-760 DEG C；Standby material, which subsequently enters powder flow heat regenerator and be water-cooled to temperature and obtain cement less than 120 DEG C, to burn
Burn raw material；(3) stock up: cement calcination raw material then pass through transportation system and enter cement calcination raw material silo, spare.
A kind of cement calcination raw material of alternative traditional quick lime, are obtained using above-mentioned preparation process.
A kind of application of cement calcination raw material of above-mentioned alternative traditional quick lime in environmental pollution improvement.
The beneficial effects of the present invention are:
(1) preparation process of the cement calcination raw material of this kind provided by the invention alternative traditional quick lime；It is raw in cement
At in the process, under the premise of not influencing clinker main process and quality, the mode of similar formula of hitchhiking is taken to be prepared
A kind of clinker intermediate product, i.e. cement calcination raw material；Compared to traditional quick lime, preparing for the cement calcination raw material is simple
It is convenient.It does not need new addressing to found the factory, technical grade quick lime price is at 500-600 yuan/ton at present, through cost accounting, cement calcination
The price of raw material is can be controlled within 250-300 member, and price advantage is more obvious.
(2) the cement calcination raw material of this kind provided by the invention alternative traditional quick lime, are derived from cement and generated
Intermediate product in journey, raw material resources are abundant；The obtained cement calcination raw material category of the preparation method provided through the invention
In high alkalinity material, wherein CaO content reaches 65% or more；And porosity and looseness shape is presented in cement calcination raw material, grain diameter is
100-300nm, large specific surface area, activity are high；After high temperature sintering, containing active high calcium salt, aluminate, magnesium salts, silicate
There is active site abundant Deng, these alkaline nanometer materials, can neutralize a large amount of hydrogen ions, and there is stronger absorption to stablize and consolidate
Change heavy metal ability.
(3) the cement calcination raw material of this kind provided by the invention alternative traditional quick lime, alternative tradition quick lime are answered
For in the processing disposition of the pollutants such as acid soil, acid waste water, acid waste residue.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The preparation process of the cement calcination raw material of traditional quick lime alternative to one kind provided in an embodiment of the present invention below
It is specifically described.
Common clinker manufacturing process includes:
(1) according to parts by weight, by 80-90 parts of lime stone, 10-15 parts of siliceous raw material and 1-5 parts of irony school
Positive raw material is mixed and dried grinding and obtains fecula material；Raw meal powder is after pneumatic homognization, into cement kiln suspended preheater and dore furnace
System (lower abbreviation preheating decomposition furnace system).
(2) just enter when the preheaters at different levels in the preheated decomposition furnace system of raw meal powder are dry is warming up to 800 DEG C or so
In its dore furnace, in dore furnace, the carbonate in lime stone in raw meal powder is (with CaCO3Based on, a small amount of MgCO3) height occurs
Temperature is decomposed, and when resolution ratio reaches 90-95%, after the final stage preheater in preheated decomposition furnace system carries out material gas separation, is obtained
To the high temperature sintering raw material for entering before kiln, 840-860 DEG C of material temperature.It should be noted that the detection method of carbonate decomposition rate is
Existing manufacture of cement routine Routine methods.Feeder pipe in the preheated decomposition furnace system of high temperature sintering raw material (is called in the following text and " is entered under kiln
Expects pipe ") enter cement rotary kiln generation solid phase and sintering reaction, form clinker.
It should be noted that the cement calcination raw material prepared by the present invention that can substitute traditional quick lime are raw in clinker
During production, under the premise of not influencing its main process and quality, hitchhiked being prepared of formula by dedicated unit.
The preparation process of the cement calcination raw material of the alternative traditional quick lime of one kind provided in this embodiment includes:
(1) sub-material: material distributing valve is installed in the feeding point for entering kiln feeder pipe, by the material-distributing action of material distributing valve, is realized above-mentioned
Carbonato resolution ratio be 90-95% the extracting section for entering kiln high temperature sintering raw material, extracted amount be into kiln high temperature burn
The 1-10% of raw material total amount is burnt as standby material.
Specifically, the extraction of different proportion high temperature sintering raw material can be realized by adjusting material distributing valve spool position.Sub-material
By the extracted amount of the corresponding mark display different proportion of dial, withdrawal ratio can be according to market or project need for valve core position
It is adjusted.
(2) cooling: it is air-cooled that the standby material of extraction first passes through cooling cyclone progress.In the present embodiment, cooling cyclone
Air intake vent correspond to outside air, air outlet (center air-exhausting duct) docks kiln tail cogeneration SP boiler, by kiln tail waste heat
The system negative pressure to generate electricity in SP boiler realizes that the suspension air of high temperature sintering raw material is cooling.The spare material temperature of cooling cyclone outlet
Degree is 720-760 DEG C, and standby material, which subsequently enters powder flow heat regenerator and be water-cooled to temperature and obtain cement less than 120 DEG C, to burn
Burn raw material.The soft water for condensed 30-40 DEG C of the cogeneration unit lack of gas that water during water is cooling uses for cement industry, one
Produce 5000T clinker professional standard production line daily, circulation soft water amount is about 5-6T per hour.The cement calcination raw material are
It close to room temperature, is readily transported and is used with industry, and can directly substitute the novel alkaline material of traditional quick lime.
(3) stock up: the cement calcination raw material enter cement calcination raw material silo by transportation system, then again by such as cement
It dissipates the Conventional transports devices such as ash vehicle and enters the environmentally friendly application field such as fixed-end forces.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
Present embodiments provide a kind of preparation process of the cement calcination raw material of alternative traditional quick lime, comprising:
(1) sub-material: in the normal productive process of cement plant, sampled detection enters the carbonic acid of kiln high-temperature cement calcination raw material
Salt resolution ratio is 91%, and temperature is 845 DEG C, and the preparation process mass for meeting the cement calcination raw material of alternative traditional quick lime is wanted
It asks.Material distributing valve spool position is adjusted to the position of dial 5, realizes the extraction into kiln high-temperature cement calcination raw material total amount 5%.
(2) cooling: standby material first passes through cooling cyclone and carries out air cooling, out the standby material of the outlet of cooling cyclone
Temperature is 745 DEG C, and standby material subsequently enters powder flow heat regenerator and carries out water cooling, most afterwards through three in powder flow heat regenerator
Block changes the cooling cement calcination raw material for obtaining temperature and being 110 DEG C of thermal module heat exchange.
(3) it stocks up: and then enter cement calcination raw material silo through the transportation systems such as bucket elevator and belt conveyor, then
The Conventional transports devices such as grey vehicle are dissipated by such as cement again and enter the environmentally friendly application field such as fixed-end forces.
Embodiment 2
Present embodiments provide a kind of preparation process of the cement calcination raw material of alternative traditional quick lime, comprising:
(1) sub-material: in the normal productive process of cement plant, sampled detection enters the carbonic acid of kiln high-temperature cement calcination raw material
Salt resolution ratio is 93%, and temperature is 856 DEG C, and the preparation process mass for meeting the cement calcination raw material of alternative traditional quick lime is wanted
It asks.Material distributing valve spool position is adjusted to the position of dial 10, realizes the extraction into kiln high-temperature cement calcination raw material total amount 10%.
(2) cooling: standby material first passes through cooling cyclone and carries out air cooling, out the standby material of the outlet of cooling cyclone
Temperature is 760 DEG C, and standby material subsequently enters powder flow heat regenerator and carries out water cooling, most afterwards through three in powder flow heat regenerator
Block changes the cooling cement calcination raw material for obtaining temperature and being 120 DEG C of thermal module heat exchange.
(3) it stocks up: and then enter cement calcination raw material silo through the transportation systems such as bucket elevator and belt conveyor, then
The Conventional transports devices such as grey vehicle are dissipated by such as cement again and enter the environmentally friendly application field such as fixed-end forces.
Embodiment 3
Present embodiments provide a kind of preparation process of the cement calcination raw material of alternative traditional quick lime, comprising:
(1) sub-material: in the normal productive process of cement plant, sampled detection enters the carbonic acid of kiln high-temperature cement calcination raw material
Salt resolution ratio is 92%, and temperature is 850 DEG C, and the preparation process mass for meeting the cement calcination raw material of alternative traditional quick lime is wanted
It asks.Material distributing valve spool position is adjusted to the position of dial 6, realizes the extraction into kiln high-temperature cement calcination raw material total amount 6%.
(2) cooling: standby material first passes through cooling cyclone and carries out air cooling, out the standby material of the outlet of cooling cyclone
Temperature is 745 DEG C, and standby material subsequently enters powder flow heat regenerator and carries out water cooling, most afterwards through three in powder flow heat regenerator
Block changes the cooling cement calcination raw material for obtaining temperature and being 118 DEG C of thermal module heat exchange.
(3) it stocks up: and then enter cement calcination raw material silo through the transportation systems such as bucket elevator and belt conveyor, then
The Conventional transports devices such as grey vehicle are dissipated by such as cement again and enter the environmentally friendly application field such as fixed-end forces.
Experimental example 1
Electrolytic manganese residues stable curing is tested using the cement calcination raw material that embodiment 1 provides:
Electrolytic manganese residues are that a kind of acid industrial solid that filters pressing workshop emits in electrolytic manganese metal production process is discarded
Object (pH=5.0-6.5) easily pollutes environment wherein containing a large amount of manganese and ammonia nitrogen.
Wherein ammonia nitrogen concentration is 1563mg/L, manganese ion concentration 3102mg/L in electrolytic manganese residues in this experimental example.Step
It is as follows:
(1) electrolytic manganese residues and cement calcination raw material are according to electrolytic manganese residues: cement calcination raw material=10:1.5 (dry electrolytic manganese residues
10kg: cement calcination raw material 1.5kg) it is uniformly mixed；
(2) slurry (dry electrolytic manganese residues and cement calcination is made according to solid-to-liquid ratio=1:0.5 in the mixture in step (1)
Green stock mixture: water=11.5kg:5.8L), it stores up 20 days；
(3) step (2) mixed material is conveyed into the stockpiling of stockpiling ground or is used for other utilization；After stockpiling in 5 days, to electrolysis
Manganese slag leaching test is it is found that ammonia nitrogen concentration is 6.5mg/L, manganese ion concentration 0.82mg/L in electrolytic manganese residues leachate；It leaches
Manganese and ammonia nitrogen concentration are lower than " integrated wastewater discharge standard GB8978-1996 "-ammonia nitrogen (25mg/L), manganese (2mg/L) country in liquid
First discharge standard.
Experimental example 2:
The cement calcination raw material provided using embodiment 2 leach harmless treatment disposition experiment to ardealite:
Ardealite is a kind of acid industrial solid castoff (pH=that filters pressing workshop emits after sulfuric acid leaching phosphorus ore
2.0-3.5), wherein containing soluble phosphate and fluorine ion, environment is easily polluted.
Wherein phosphate concentration is 867mg/L, fluorinion concentration 185mg/L in ardealite in this experimental example.Step is such as
Under:
(1) ardealite and cement calcination raw material are according to electrolytic manganese residues: cement calcination raw material=10:1 (dry ardealite 10kg:
Cement calcination raw material 1kg) uniformly mixed；
(2) slurry (dry electrolytic manganese residues and cement calcination is made according to solid-to-liquid ratio=1:0.5 in the mixture in step (1)
Green stock mixture: water=11kg:5.5L), it stores up 10 days；
(3) step (2) mixed material is conveyed into the stockpiling of stockpiling ground or is used for other utilization；After stockpiling in 10 days, to phosphorus
Gypsum leaching test is it is found that phosphate concentration is 11.2mg/L, fluorinion concentration 7.8mg/L in ardealite leachate；It leaches
Fluorine ion, phosphate concn meet " the discharge standard GB 15580-1995 in Phosphate Fertilizer Industry pollution discharge standard "-in liquid
Fluorine (15mg/L), phosphate (20mg/L) standard.
Experimental example 3:
Ammonia nitrogen waste water stripping is tested using the cement calcination raw material cement calcination raw material that embodiment 3 provides:
Electrolytic manganese metal enterprise gives off a large amount of ammonia nitrogen waste waters containing manganese.
Ammonia nitrogen concentration is 432mg/L, manganese ion concentration 204mg/L in waste water in this experimental example.Steps are as follows: using cement
Calcination raw material adjust Electrolytic Manganese Wastewater pH to 12.5-13.0, and in temperature 60 C, gas liquid ratio is under conditions of 300:1, stripping reaction
4h, escaping gas are absorbed using dilute sulfuric acid, and ammonia nitrogen concentration is lower than 25mg/L, manganese ion concentration 1.2mg/ in waste water after stripping
L.Harmless treatment is carried out to manganese in electrolytic manganese residues and ammonia nitrogen using cement calcination raw material, manganese and ammonia nitrogen concentration are lower than in leachate
" integrated wastewater discharge standard GB8978-1996 "-ammonia nitrogen (25mg/L), manganese (2mg/L) national grade one discharge standard.
Binding experiment example 1-3 explanation, can be completely instead of tradition by cement calcination raw material provided in an embodiment of the present invention
Quick lime is for the acid contaminants harmless treatments such as acid waste residue, ammonia nitrogen waste water disposition.
In conclusion the preparation process of the cement calcination raw material using alternative traditional quick lime provided by the invention, it should
Preparation process takes the mode of similar formula of hitchhiking to be prepared one under the premise of not influencing clinker main process and quality
Kind clinker intermediate product, i.e. cement calcination raw material；Compared to traditional quick lime, the preparation of the cement calcination raw material is convenient,
Cost is relatively low.Using the cement calcination raw material of alternative traditional quick lime provided by the invention, the cement calcination raw material cost compared with
Low, alternative tradition quick lime is applied in the processing disposition of the pollutants such as acid soil, acid waste water, acid waste residue, and energy
Enough obtain excellent regulation effect.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of preparation process of the cement calcination raw material of alternative traditional quick lime, it is characterised in that: include:
(1) sub-material: carbonato resolution ratio be 90-95% high-temperature cement calcination raw material enter kiln before, extract the height
The 1-10% of warm water mud calcination raw material amount is as standby material；
(2) cooling: the standby material first passes through cooling cyclone and carries out air cooling, and the cooling cyclone exports described standby
Materials temperature is 720-760 DEG C；The standby material subsequently enters powder flow heat regenerator and be water-cooled to temperature less than 120 DEG C
Obtain the cement calcination raw material；
(3) stock up: the cement calcination raw material then pass through transportation system and enter cement calcination raw material silo, spare.
2. the preparation process of the cement calcination raw material of alternative traditional quick lime according to claim 1, it is characterised in that:
The temperature of the high temperature sintering raw material is 840-860 DEG C.
3. the preparation process of the cement calcination raw material of alternative traditional quick lime according to claim 1, it is characterised in that:
Step (1) is realized by installing material distributing valve in the feeding point for entering kiln feeder pipe.
4. the preparation process of the cement calcination raw material of alternative traditional quick lime according to claim 1, it is characterised in that:
In step (2), the air intake vent of the cooling cyclone corresponds to outside air, and the air outlet of the cooling cyclone docks more than kiln tail
Hot electricity generation boiler, the suspension to realize the high temperature sintering raw material using the system negative pressure in the kiln tail boiler of power generation by waste heat are empty
Air cooling.
5. the preparation process of the cement calcination raw material of alternative traditional quick lime according to claim 1, it is characterised in that:
In step (2), the water in the water cooling is the soft of condensed 30-40 DEG C of the cogeneration unit lack of gas that cement industry uses
Water.
6. a kind of cement calcination raw material of alternative traditional quick lime, it is characterised in that: use claim 1-5 any one institute
The preparation process of the cement calcination raw material for the alternative traditional quick lime stated is prepared.
7. a kind of cement calcination raw material answering in environmental pollution improvement of alternative traditional quick lime as claimed in claim 6
With.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112404096A (en) * | 2020-10-26 | 2021-02-26 | 贵州大学 | Treatment method for removing ammonia by fixing manganese in electrolytic manganese slag |
| CN115041253A (en) * | 2022-06-01 | 2022-09-13 | 成都进达科技有限公司 | Raw material coal-saving auxiliary agent for cement clinker firing process and preparation method thereof |
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| CN109231858A (en) * | 2018-11-14 | 2019-01-18 | 四川海沛环保科技有限公司 | A kind of pretreatment of electrolytic manganese residues and the innoxious and application technology as the second resource that concrete is combined with composite admixture is made |
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| US20100178624A1 (en) * | 2008-02-19 | 2010-07-15 | Srivats Srinivasachar | Method of Manufacturing Carbon-Rich Product and Co-Products |
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| CN112404096A (en) * | 2020-10-26 | 2021-02-26 | 贵州大学 | Treatment method for removing ammonia by fixing manganese in electrolytic manganese slag |
| CN115041253A (en) * | 2022-06-01 | 2022-09-13 | 成都进达科技有限公司 | Raw material coal-saving auxiliary agent for cement clinker firing process and preparation method thereof |
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Application publication date: 20190614 |