CN109467322A - A kind of carbide slag produces the production technology of quick lime - Google Patents
A kind of carbide slag produces the production technology of quick lime Download PDFInfo
- Publication number
- CN109467322A CN109467322A CN201811500614.0A CN201811500614A CN109467322A CN 109467322 A CN109467322 A CN 109467322A CN 201811500614 A CN201811500614 A CN 201811500614A CN 109467322 A CN109467322 A CN 109467322A
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- China
- Prior art keywords
- carbide slag
- quick lime
- carbide
- calcium
- sent
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- 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.)
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Classifications
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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
-
- 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
- C04B2/02—Lime
Abstract
A kind of carbide slag produces the production technology of quick lime, and the technological process of production is as follows: 1, carbide slag cleans.The use of calcium carbide is raw material, acetylene gas is produced by dry acetylene generator, the carbide slag water content of generation is 3%-50% or so.Using the separation method of the removal of impurities such as selection by winnowing or vibration screening, the impurity such as magnesium, aluminium, silicon, the iron in carbide slag are removed.2, carbide slag is calcined.By high-temperature calcination equipment, the calcium hydroxide in carbide slag is sintered into calcium oxide, is sent into and is calcined in main furnace through screw feeder, calcining and decomposing, becomes quick lime at high temperature.3, quick lime pressure ball.By dry powder ball press, quick lime powder is suppressed into balling-up.Remarkable result of the invention are as follows: convert high value added product for carbide slag, turn waste into wealth, substantially reduce buying and the transportation cost of raw material, improve Business Economic Benefit.
Description
Technical field
The invention belongs to solid waste process field field, in particular to a kind of carbide slag produces the production work of quick lime
Skill.
Technical background
Carbide slag is that the solid product generated after acetylene occurs for calcium carbide hydrolysis, belongs to industrial residue, main component is hydroxide
Calcium [Ca (OH) 2], can be used for preparing calcium hydroxide desulfurizing agent, roadbed material and construction material.Currently, the country there is no carbide slag to follow
Ring is using as the technique of calcium carbide raw materials for production, and in addition to cement, power plant desulfurization are used up sub-fraction, majority becomes solid waste.Largely
Carbide slag not only without generating economic value, become pollution sources instead, carbide slag consumes a large amount of people in storage and transportation, treatment process
Power material resources, occupy environmental carrying capacity, become a big weakness of calcium carbide industry.On the other hand, raw material limestone is increasingly in short supply, causes
The production of quick lime is also gradually limited.The factor of these two aspects, so that can the reuse of carbide slag become calcium carbide industry and continue to send out
One of the project the most urgent of exhibition.
Summary of the invention
The purpose of the present invention is directed to shortcoming of the existing carbide slag as solid waste generation environment pollution problem, provides
Turn waste into wealth and produces the production technology of quick lime with carbide slag.
Quick lime can fuse into calcium carbide when impurities melt in furnace of calcium carbide as calcium carbide raw materials for production, to drop
The quality of low calcium carbide in addition, impurity consumes electric energy in fusing, and improves the unit power consumption of product, therefore calcium carbide production is to original
The specification of quality of material has very strict requirement.
Contain SiO in carbide slag2、Al2O3、Fe2O3, the impurity such as MgO, quick lime is converted for carbide slag by high-temperature calcination
During this, above-mentioned impurity can also remain in quick lime therewith, therefore the purification separation of carbide slag is good for production quality
Good quick lime is particularly important.
Various impurity in quick lime, it is larger to calcium carbide production harm with magnesia.Mainly magnesia melts in furnace
Area is reduced to rapidly magnesium metal, and molten bath in furnace of calcium carbide is made to form a high temperature reduction area, and magnesium metal escapes in a gaseous form,
A portion is chemically reacted with the CO gas generated in furnace, generates magnesia, it is an exothermic reaction, this
The high temperature that a side reaction heat release is formed can be such that the hard shell of furnace charge melt tank edge is destroyed, and cause to melt calcium carbide fluid to external diffusion,
It is directly contacted with furnace wall, is easy to burn out furnace wall refractory brick, finally destroys furnace shell.
Purpose technical solution is as follows to realize the present invention:
A kind of carbide slag produces the production technology of quick lime, and the technological process of production is as follows:
1, carbide slag cleans
The use of calcium carbide is raw material, acetylene gas is produced by dry acetylene generator, the carbide slag water content of generation is 3%-50%
Left and right.Using the separation method of the removal of impurities such as selection by winnowing or vibration screening, the impurity such as magnesium, aluminium, silicon, the iron in carbide slag are removed.
2, carbide slag is calcined
By high-temperature calcination equipment, the calcium hydroxide in carbide slag is sintered into calcium oxide, calcium oxide content and critical impurities contain
Amount can meet the requirement of calcium carbide production.Carbide slag raw material is sent into through screw feeder and is calcined in main furnace, at high temperature calcining point
Solution, becomes quick lime.Product is sent into quick lime warehouse, empties after tail gas clean-up.
3, quick lime pressure ball
By dry powder ball press, quick lime powder is suppressed into balling-up.It is sent into lime ball storehouse, or is directly sent according to calcium carbide charging proportion
Enter furnace of calcium carbide to be produced.
Remarkable result of the invention are as follows: 1) alleviate limestone resource pressure, lime stone mineral products increasingly in short supply are formed and are protected
Shield；2) in today of Environmental Protection Situation growing tension, it is significantly reduced pollution of the carbide slag to surrounding enviroment；3) carbide slag is converted
For high value added product, turn waste into wealth, substantially reduces buying and the transportation cost of raw material, improve Business Economic Benefit.
Specific embodiment
A specific embodiment of the invention is further illustrated by embodiment.
Embodiment one
Dry method carbide slag produces quick lime technique:
1, carbide slag cleans
The use of calcium carbide is raw material, acetylene gas is produced by dry acetylene generator, the carbide slag water content of generation is 3%-50%
Left and right.Using the separation method of the removal of impurities such as selection by winnowing or vibration screening, the impurity such as magnesium, aluminium, silicon, the iron in carbide slag are removed.
Dry acetylene sludge is sent into V-type powder concentrator and is sorted, and after the sorting of V-type powder concentrator, fine powder enters with air-flow
High-efficient powder concentrator；After high-efficient powder concentrator sorts, qualified feed powder enters cyclone cylinder, then is sent by conveyer, bucket elevator
Qualified carbide slag library.
2, carbide slag is calcined
By the calcination system of complete set, the calcium hydroxide in carbide slag is sintered into calcium oxide completely, calcium oxide content and
Purity and Active pharmaceutical needed for activity must meet calcium carbide production.
The activity of lime refers to that lime generates the respond of reaction process in calcium carbide, and the activity of lime is higher, in electricity
The burn-off rate that stone generates in reaction process is faster, and chemical reaction ability is stronger.The principal element for determining Activity of Lime is it
Crystal grain diameter and the porosity in physical property, it is closely related with calcination temperature and calcination time.Carbide slag calcine technology is with life
The quick lime product of output purity and activity degree qualification is target.
Carbide slag raw material is sent into through screw feeder and is calcined in main furnace, calcining and decomposing, becomes quick lime at high temperature.It produces
Object is sent into quick lime warehouse, empties after tail gas clean-up.
3, quick lime pressure ball
Calcium carbide production quick lime used, generally requires partial size between 8-70mm.The quick lime obtained by calcining carbide slag,
Partial size, which is not inconsistent, is incorporated into furnace requirement, therefore, calcium lime powder is pressed into meet it is into furnace particle size, hard on an equal basis with primary lime block
The quick lime pelletizing of degree.
By dry powder ball press, quick lime powder is suppressed into balling-up.It is sent into lime ball storehouse, or straight according to calcium carbide charging proportion
It picks and is produced into furnace of calcium carbide.
Main physical and chemical index after 1 quick lime pressure ball of table
| Parameter name | Numerical value |
| Calcium oxide (CaO), % | ≥92 |
| Breakage rate (100m transmission range), % | ≤3 |
| Compression strength, MPa | ≥1.0 |
| Heatproof crash test, DEG C | ≥900 |
By carbide slag removal of impurities, three carbide slag calcining, quick lime pressure ball processes, carbide slag is processed into and can be used for calcium carbide life
The lime ball of production, to achieve the purpose that carbide slag is recycled.
Embodiment two
Wet process carbide slag produces quick lime technique:
1, wet process carbide slag cleans
The use of calcium carbide is raw material, acetylene gas is produced by wet process acetylene generator, the carbide slag slurries water content of generation is 85-
95% or so.By carbide slag slurry by cyclone hydraulic separators, vibrating screen, wherein entrained solid impurity is removed.Initial gross separation it
Afterwards, it is sent into refining spearation device, complexing agent and reducing agent is added, into the slurries of refining spearation device further to remove wherein
The harmful ions such as Mg, Al, Fe.
By the carbide slag slurries of refining spearation device by filter remove about 55-60% moisture after, be sent into preheating furnace in into
One step drying removing moisture, while generating some vapor；It steams (water content≤2%) after most of moisture, is sent into calcination process.
2, carbide slag is calcined
By the high temperature calciner such as rotary kiln or calcining furnace, the calcium hydroxide in carbide slag is sintered into calcium oxide, oxygen completely
The content for changing calcium content and critical impurities can meet the requirement that calcium carbide produces.
The activity of lime refers to that lime generates the respond of reaction process in calcium carbide, and the activity of lime is higher, in electricity
The burn-off rate that stone generates in reaction process is faster, and chemical reaction ability is stronger.The principal element for determining Activity of Lime is it
Crystal grain diameter and the porosity in physical property, it is closely related with calcination temperature and calcination time.Carbide slag calcine technology is with life
The quick lime product of output purity and activity degree qualification is target.
Carbide slag raw material is sent into through screw feeder and is calcined in main furnace, calcining and decomposing, becomes quick lime at high temperature.It produces
Object is sent into quick lime warehouse, empties after tail gas clean-up.
3, quick lime pressure ball
Calcium carbide production quick lime used, generally requires partial size between 8-70mm.The quick lime obtained by calcining carbide slag,
Partial size, which is not inconsistent, is incorporated into furnace requirement, therefore, calcium lime powder is pressed into meet it is into furnace particle size, hard on an equal basis with primary lime block
The quick lime pelletizing of degree.
By dry powder ball press, quick lime powder is suppressed into balling-up.It is sent into lime ball storehouse, or straight according to calcium carbide charging proportion
It picks and is produced into furnace of calcium carbide.
Main physical and chemical index after 2 quick lime pressure ball of table
| Parameter name | Numerical value |
| Calcium oxide (CaO), % | ≥92 |
| Breakage rate (100m transmission range), % | ≤3 |
| Compression strength, MPa | ≥1.0 |
| Heatproof crash test, DEG C | ≥900 |
By carbide slag removal of impurities, three carbide slag calcining, quick lime pressure ball processes, carbide slag is processed into and can be used for calcium carbide life
The lime ball of production, to achieve the purpose that carbide slag is recycled.
After wet process carbide slag is by removal of impurities, calcining, the quick lime of production is able to satisfy the raw materials requirement of calcium carbide production.Carbide slag
After 700-1200 DEG C of different temperatures section is calcined, the quick lime of production can satisfy the ingredient requirement of calcium carbide production.
By the quick lime of limestone calcination, impurity Mg content therein, usually in 1.0-1.5% or so；And in carbide slag
The basic < 1.0% of the content of impurity Mg.
Using carbide slag as raw material, the processes such as removal of impurities, calcining, molding are combined, the quick lime produced can be used as calcium carbide
Raw materials for production.
Claims (2)
1. the production technology that a kind of carbide slag produces quick lime, which is characterized in that the technological process of production is as follows:
1) carbide slag cleans: the use of calcium carbide being raw material, produces acetylene gas by dry acetylene generator, the carbide slag of generation contains
Water is 3%-50% or so.Using the separation method of the removal of impurities such as selection by winnowing or vibration screening, magnesium, the aluminium, silicon, iron in carbide slag are removed
Equal impurity；
2) carbide slag is calcined: by high-temperature calcination equipment, the calcium hydroxide in carbide slag being sintered into calcium oxide, calcium oxide content
And critical impurities content can meet the requirement of calcium carbide production.Carbide slag raw material is sent into through screw feeder and is calcined in main furnace,
Calcining and decomposing under high temperature, becomes quick lime.Product is sent into quick lime warehouse, empties after tail gas clean-up；
3) by dry powder ball press, quick lime powder quick lime pressure ball: is suppressed into balling-up.It is sent into lime ball storehouse, or according to calcium carbide
Charging proportion is sent directly into furnace of calcium carbide and is produced.
2. the production technology that carbide slag according to claim 1 produces quick lime, which is characterized in that also while including with wet
Method carbide slag is that raw material produces quick lime technique: where the removal of impurities of wet process carbide slag is raw material using calcium carbide, passes through wet process acetylene
Generating device produces acetylene gas, by the carbide slag slurry of the aqueous > 80% of generation, is separated, is removed by the modes such as being centrifuged, vibrating
Solid impurity therein.After initial gross separation, be sent into refining spearation device and additive simultaneously be added, further remove Mg, Al, Fe etc. from
Son；After the carbide slag slurries of refining spearation device are by filtering, then drying removing most of moisture, it is sent into carbide slag calcination process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811500614.0A CN109467322A (en) | 2018-12-10 | 2018-12-10 | A kind of carbide slag produces the production technology of quick lime |
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| CN201811500614.0A CN109467322A (en) | 2018-12-10 | 2018-12-10 | A kind of carbide slag produces the production technology of quick lime |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759371A (en) * | 2019-12-04 | 2020-02-07 | 新疆国峰嘉和环保科技有限公司 | Method for preparing calcium oxide by purifying and recycling carbide slag |
| CN111204788A (en) * | 2020-02-17 | 2020-05-29 | 浙江天蓝环保技术股份有限公司 | Process and system for preparing high-strength blocky active lime from carbide slag |
| CN111717916A (en) * | 2020-06-03 | 2020-09-29 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing calcium carbide raw material active calcium oxide by using wet-process calcium carbide slag |
| CN111717929A (en) * | 2020-07-10 | 2020-09-29 | 沈阳鑫博工业技术股份有限公司 | Carbide slag comprehensive utilization device and method |
| CN112408445A (en) * | 2020-12-08 | 2021-02-26 | 山东泰和水处理科技股份有限公司 | Calcium oxide production device and production method |
| CN113087002A (en) * | 2021-04-02 | 2021-07-09 | 沈阳东大东科干燥煅烧工程技术有限公司 | Method and system for preparing calcium oxide balls from carbide slag |
| CN113461345A (en) * | 2021-07-23 | 2021-10-01 | 沈阳鑫博工业技术股份有限公司 | Device and method for producing lime for calcium carbide by roasting calcium carbide slag and forming |
| CN113750952A (en) * | 2021-10-13 | 2021-12-07 | 昆明理工大学 | Adsorbing material for removing carbonyl sulfide and preparation method thereof |
| CN117843258A (en) * | 2024-03-07 | 2024-04-09 | 陕西金泰化学科技集团有限公司 | Calcium oxide calcining process and system by carbide slag carbonization |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927699A (en) * | 2017-03-09 | 2017-07-07 | 王光建 | A kind of method that utilization carbide slag prepares calcium carbide lime |
| CN108046302A (en) * | 2017-11-28 | 2018-05-18 | 新疆国峰嘉和环保科技有限公司 | A kind of method that carbide slag produces high-purity white lime |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927699A (en) * | 2017-03-09 | 2017-07-07 | 王光建 | A kind of method that utilization carbide slag prepares calcium carbide lime |
| CN108046302A (en) * | 2017-11-28 | 2018-05-18 | 新疆国峰嘉和环保科技有限公司 | A kind of method that carbide slag produces high-purity white lime |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759371A (en) * | 2019-12-04 | 2020-02-07 | 新疆国峰嘉和环保科技有限公司 | Method for preparing calcium oxide by purifying and recycling carbide slag |
| CN111204788A (en) * | 2020-02-17 | 2020-05-29 | 浙江天蓝环保技术股份有限公司 | Process and system for preparing high-strength blocky active lime from carbide slag |
| CN111717916A (en) * | 2020-06-03 | 2020-09-29 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing calcium carbide raw material active calcium oxide by using wet-process calcium carbide slag |
| CN111717916B (en) * | 2020-06-03 | 2024-04-12 | 新疆中泰创安环境科技股份有限公司 | Method and device for producing active calcium oxide as calcium carbide raw material by wet method calcium carbide slag |
| CN111717929A (en) * | 2020-07-10 | 2020-09-29 | 沈阳鑫博工业技术股份有限公司 | Carbide slag comprehensive utilization device and method |
| CN112408445A (en) * | 2020-12-08 | 2021-02-26 | 山东泰和水处理科技股份有限公司 | Calcium oxide production device and production method |
| CN113087002A (en) * | 2021-04-02 | 2021-07-09 | 沈阳东大东科干燥煅烧工程技术有限公司 | Method and system for preparing calcium oxide balls from carbide slag |
| CN113461345A (en) * | 2021-07-23 | 2021-10-01 | 沈阳鑫博工业技术股份有限公司 | Device and method for producing lime for calcium carbide by roasting calcium carbide slag and forming |
| CN113750952A (en) * | 2021-10-13 | 2021-12-07 | 昆明理工大学 | Adsorbing material for removing carbonyl sulfide and preparation method thereof |
| CN117843258A (en) * | 2024-03-07 | 2024-04-09 | 陕西金泰化学科技集团有限公司 | Calcium oxide calcining process and system by carbide slag carbonization |
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