CN110451823A - The technique and portland cement of portland cement are prepared using carbide slag and mine tailings - Google Patents
The technique and portland cement of portland cement are prepared using carbide slag and mine tailings Download PDFInfo
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- CN110451823A CN110451823A CN201910681949.5A CN201910681949A CN110451823A CN 110451823 A CN110451823 A CN 110451823A CN 201910681949 A CN201910681949 A CN 201910681949A CN 110451823 A CN110451823 A CN 110451823A
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- Prior art keywords
- carbide slag
- portland cement
- mine tailings
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- calcined
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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
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
- C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses the technique that portland cement is prepared using carbide slag and mine tailings and corresponding portland cements, the following steps are included: 1) carbide slag is sent into drying machine drying to moisture less than 1.5%, dewatered carbide slag main component is Ca (OH)2Powder；2) 0.55~0.75 part of carbide slag drying, 0.045~0.065 part of aluminium ash, 0.15~0.30 part of mine tailings, 0.02-0.04 ferro-controlling raw material are sent to raw mill grinding by proportioning machine and belted electronic balance and moisture is made less than 1.5% raw meal powder by ratio of weight and the number of copies；3) calcined by rotary kiln is sent into after being homogenized raw meal powder；4) after having calcined, calcined siccative ball is cooling by cooler；5) after the siccative ball in step 4) has cooled down, siccative ball after cooling is added to the gypsum of 5.0%-8.0%, 12.0%-30.0% mixing material is sent into ball mill and carries out grinding, and different brackets portland cement is made.On the one hand the present invention improves and take resource reutilization, another aspect also solves the problems, such as that life, property and ecology seriously threaten caused by waste is stored up for a long time.
Description
Technical field
The present invention relates to recovery and reuse of waste field, refer in particular to prepare portland cement using carbide slag and mine tailings
Technique and corresponding portland cement.
Background technique
Carbide slag, calcium carbide hydrolysis obtain acetylene gas after with calcium hydroxide waste residue as main component.Acetylene (C2H2) be
One of the important source material of basic organic synthesis industry, with calcium carbide (CaC2) it is raw material, add the technique letter of water (wet process) production acetylene
It is single mature, larger specific gravity is accounted in China at present.1t calcium carbide adds water to produce more than 300 kg acetylene gas, while generating 10t solid content about
12% industrial wastes, is commonly called as carbide slag slurries.Acetylene is the primary raw material for producing polyvinyl chloride (PVC).By knowhow, every life
It produces 1t PVC product and consumes calcium carbide 1.5-1.6t, while every t calcium carbide generates 1.2t carbide slag (butt), carbide slag water content is pressed
90% meter, then every production 1t PVC product, is discharged carbide slag slurries about 20t.It can be seen that the yield of carbide slag slurries is significantly super
The yield of PVC is crossed.Carbide slag is further dehydrated, and moisture content still reaches 40%-50%, is in starchiness, in transit easily
Leakage pollution road surface, long-term accumulation not only occupies a large amount of soils, and has serious corrosion function to soil.Only technically
Seek to break through, seek new Processing tecchnics, turn waste into wealth and efficiently use calcium carbide waste slag, can not only bring good economic benefit,
Environmental benefit and social benefit, and be able to achieve and turn waste into wealth.
Calcium carbide hydrolysis obtains acetylene and the reaction of generation carbide slag is as follows:
CaC2+2H2O ﹦ C2H2+Ca(OH)2+ 127.3KJ/ gram molecule
Its carbide slag Main chemical component are as follows:
| Project | Ca(OH)2 | MgO | Fe2O3 | SiO3 | H2 | Burn vector |
| Ratio (%) | 85.0-90.0 | 0.55-1.75 | 8.2-10.3 | 0.46-1.4 | 3.38-11 | 1.0-3.0 |
The solid waste that mine tailings source tailing refers to mining, is discharged in ore dressing process, retains metal, nonmetallic valuable mine
Object is a kind of compound material rich in substances such as silicate, carbonate, has secondary resource and environmental pollution double grading.
It causes serious environmental problem and huge security risk, but it is substantially a kind of poor, thin, miscellaneous mineral resources, is utilized
Having got well is resource, is exactly many " time bombs " if stockpiling, protecting bad not using being waste material
Its Main chemical component are as follows:
| Project | CaO | MgO | Fe2O3 | Al2O3 | SiO2 | Burn vector |
| Ratio (%) | 8.35-20.5 | 0.55-1.65 | 10.5-26.3 | 1.2-6.0 | 35.6-61.2 | 3.5-4.2 |
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of work for preparing portland cement using waste carbide slag and mine tailings
Skill and corresponding portland cement, on the one hand improve waste and recycle, and on the other hand also solve waste and store up cause for a long time
Life, property and ecology seriously threaten problem.
In order to solve the above technical problem, the present invention provides the works that portland cement is prepared using carbide slag and mine tailings
Skill, comprising the following steps:
1) carbide slag is sent into drying machine drying to moisture less than 1.5%, dewatered carbide slag main component is Ca
(OH)2Powder；
2) by ratio of weight and the number of copies by 0.55~0.75 part of carbide slag drying, 0.045~0.065 part aluminium ash, 0.15~
0.30 part of mine tailings, 0.02-0.04 ferro-controlling raw material are sent to raw mill grinding with belted electronic balance by proportioning machine and are made
Moisture is less than 1.5% raw meal powder；
3) calcined by rotary kiln is sent into after being homogenized raw meal powder；
4) after having calcined, calcined siccative ball is cooling by cooler；
5) after the siccative ball in step 4) has cooled down, siccative ball after cooling is added to the gypsum of 5.0%-8.0%,
12.0%-30.0% mixing material is sent into ball mill and carries out grinding, and different brackets portland cement is made.
Further, dewatered carbide slag CaO content is 62.0%-65.7% in step 1).
Further, each raw material in step 2) is calculated according to proportion, and three rate values control respectively: KH is controlled in 0.88-
0.92, SM control is controlled in 2.1-2.5, IM in 1.3-1.5.
Further, calcination time is 25~45min in step 3), until the temperature of mixture reaches 1350~1450
DEG C, the 3 days compression strength of clinker by calcining is 32-35MPa, and 28 days compression strength is 53-57MPa.
Further, siccative ball by cooler is cooled to 80 DEG C or less in step 4).
Further, step 3) sprays into coal ash to rotary kiln by coal injection device, and the amount of participating in of the coal ash is 3.0~
5.0%.
Further, the amount of participating in of the coal ash is 4.57%.
The portland cement prepared using carbide slag and mine tailings, the raw material including following weight percent:
0.55~0.75 part of carbide slag drying
0.045~0.065 part of aluminium ash；
0.15~0.30 part of mine tailings；
0.02-0.04 parts of ferro-controlling raw material；
Gypsum 5.0%-8.0%'s；
Mixing material 15.0%-30.0%；
The preparation of portland cement is carried out according to above-mentioned preparation process.
Compared with prior art, the beneficial effects of the present invention are: preparation process proposed by the present invention is simple, can will be electric
Rock ballast, aluminium ash, mine tailings, correction material mixed calcining have so that portland cement is made and eliminate solid waste, effectively protect
The local graceful natural ecology living environment of shield；Accelerate utilization of the recycling of renewable resources, turns waste into wealth, turn harm into good, pollution administration,
The advantages that improving environment, releasing occupied land resource.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without any creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is the artwork for the technique that embodiment prepares portland cement using carbide slag and mine tailings.
Specific embodiment
With reference to the accompanying drawings and examples, further description of the specific embodiments of the present invention.Following embodiment is only
For clearly illustrating technical solution of the present invention, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, a kind of technique for preparing portland cement using carbide slag and mine tailings, comprising the following steps: first
Carbide slag is first sent into drying machine drying to moisture less than 1.5%, dewatered carbide slag main component is Ca (OH)2Powder,
The CaO content in carbide slag is 62.0%-65.7% at this time.Then by ratio of weight and the number of copies by 0.55~0.75 part of carbide slag,
Calcium carbide, 0.045~0.065 part of aluminium ash, 0.15~0.3 part of mine tailings, 0.02-0.04 ferro-controlling raw material are namely dried,
It is calculated according to proportion, carries out electronic proportioning, control three rate value difference KH controls in 2.1-2.5, IM in 0.88-0.92, SM
Control is sent to raw mill by proportioning machine and belted electronic balance and carries out raw grinding, moisture is made and is less than in 1.3-1.5
1.5% raw meal powder.It is sent into calcined by rotary kiln after raw meal powder is homogenized, calcines 25~45min, until the temperature of mixture reaches
1350~1450 DEG C；3 days compression strength of clinker by calcining is 32-35MPa, and 28 days compression strength is 53-57MPa.Calcining
While, the coal that is provided by fuel stockyard carries out after coal grinder sequence through coal injection device to carrying out coal powder injection, coal ash in rotary kiln
The amount of participating in be 3.0~5.0%.After having calcined, by the siccative ball by cooler carry out clinker cooling, be cooled to 80 DEG C with
Under；Heat when can cool down herein to cooler is collected, and carries out cogeneration or conduct by the heat of collection
The drying heat source of carbide slag is delivered to dryer and is recycled as grinding heat source；After siccative ball has cooled down, by the siccative
The gypsum of 5.0%-8.0% is added in ball, 12.0%-30.0% mixing material is sent into ball mill together and carries out finished product mill, is made not
Ad eundem portland cement, classification storage.
The material composition analysis of the present embodiment is as shown in table 1.
Table 1. prepares portland cement primary raw material constituent analysis
Burdening calculation is carried out to each raw material below according to the preparation process of the present embodiment, and entire technical process is tested
Point counting analysis.
The Industrial Analysis of coal and coal ash is as shown in table 2.
The Industrial Analysis of 2. coal of table and coal ash
Calculate coal ash incorporation
GA=(q*Ay*S)/(Qy) * 100) (S is dust settling rate)
=(3350*28.56*100)/(20930*100)
=4.57%
Burdening calculation: Ca (OH) in carbide slag2It is 62.0%-65.7%, raw meal proportioning rate value that content, which is converted to CaO content,
It is set as KH=0.91, SM=2.10, IM=1.40.
If ∑=97.5%
Then Fe2O3=∑/((2.8KH+1) (IM+1) SM+2.65IM+1.35)
=3.5%
Al2O3=IM*Fe2O3=4.9%
SiO2=SM (Al2O3+Fe2O3)=21.84%
CaO=∑-(SiO2+Al2O3+Fe2O3)=67.26%
The chemical analysis such as table 3 of raw material, clinker.
The chemical composition analysis of 3. raw material of table, clinker
It should be noted that free calcium is 2.0% meter.
Checking computations rate value is formed by the clinker of calculating
KH=(C-1.65*A-0.35F)/2.8S=0.887
SM=S/ (A+F)=2.16
IM=A/F=1.32
Acquired results KH, IM are slightly lower compared with requiring, and silicon rate is slightly higher, but very close to required value, can match by this
Material is produced.
Clinker mineral:
C3S=3.80 (3KH-2) SiO2=56.39
C2S=8.60 (1-KH) SiO2=21.81
C3A=2.65 (Al2O3-0.64Fe2O3=8.48
C4AF=3.04Fe2O=12.98
It is 21.46%. mineral total amount according to 75 ﹪ of C3S+C2S > is 78.22%, C3A+C4AF summation in calculating clinker
99.68 ﹪ meet the condition of portland cement production greater than the requirement of portland cement mineral total amount 95.0%.In conclusion
The preparation process of the present embodiment, can be by clay-slag/soda waste mud slag, aluminium ash, mine tailings, correction material mixed calcining silicon is made
Acid salt cement.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. the technique for preparing portland cement using carbide slag and mine tailings, it is characterised in that: the following steps are included:
1) carbide slag is sent into drying machine drying to moisture less than 1.5%, dewatered carbide slag main component is Ca (OH)2Powder
Body；
2) by ratio of weight and the number of copies by 0.55~0.75 part of carbide slag drying, 0.045~0.065 part of aluminium ash, 0.15~0.30
Part mine tailings, 0.02-0.04 ferro-controlling raw material, are sent to raw mill grinding by proportioning machine and belted electronic balance and moisture are made
Less than 1.5% raw meal powder；
3) calcined by rotary kiln is sent into after being homogenized raw meal powder；
4) after having calcined, calcined siccative ball is cooling by cooler；
5) after the siccative ball in step 4) has cooled down, siccative ball after cooling is added to the gypsum of 5.0%-8.0%, 12.0%-
30.0% mixing material is sent into ball mill and carries out grinding, and different brackets portland cement is made.
2. the technique according to claim 1 for preparing portland cement using carbide slag and mine tailings, it is characterised in that: step
It is rapid 1) in dewatered carbide slag CaO content be 62.0%-65.7%.
3. the technique according to claim 1 for preparing portland cement using carbide slag and mine tailings, it is characterised in that: step
It is rapid 2) in each raw material calculated according to proportion, three rate values control respectively: KH control is controlled in 0.88-0.92, SM in 2.1-
2.5, IM controls are in 1.3-1.5.
4. the technique according to claim 1 for preparing portland cement using carbide slag and mine tailings, it is characterised in that: step
It is rapid 3) in calcination time be 25~45min, until the temperature of mixture reaches 1350~1450 DEG C, the clinker by calcining 3 days
Compression strength is 32-35MPa, and 28 days compression strength is 53-57MPa.
5. the technique according to claim 1 for preparing portland cement using carbide slag and mine tailings, it is characterised in that: step
It is rapid 4) in siccative ball by cooler be cooled to 80 DEG C or less.
6. the technique according to claim 1 for preparing portland cement using carbide slag and mine tailings, it is characterised in that: step
Rapid 3) to spray into coal ash to rotary kiln by coal injection device, the amount of participating in of the coal ash is 3.0~5.0%.
7. the technique according to claim 6 for preparing portland cement using carbide slag and mine tailings, it is characterised in that: institute
The amount of participating in for stating coal ash is 4.57%.
8. the portland cement prepared using carbide slag and mine tailings, which is characterized in that the raw material including following weight percent:
0.55~0.75 part of carbide slag drying
0.045~0.065 part of aluminium ash；
0.15~0.30 part of mine tailings；
0.02-0.04 parts of ferro-controlling raw material；
Gypsum 5.0%-8.0%'s；
Mixing material 15.0%-30.0%；
Preparation process according to any one of claims 1 to 7 carries out the preparation of portland cement.
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| CN201910681949.5A CN110451823B (en) | 2019-07-26 | 2019-07-26 | Process for preparing portland cement by using carbide slag and tailing slag and portland cement |
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| CN201910681949.5A CN110451823B (en) | 2019-07-26 | 2019-07-26 | Process for preparing portland cement by using carbide slag and tailing slag and portland cement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111153612A (en) * | 2020-01-03 | 2020-05-15 | 陕西北元化工集团股份有限公司 | Industrial waste residue low-heat portland cement and preparation method thereof |
| CN111499232A (en) * | 2020-05-08 | 2020-08-07 | 张延年 | Large-mixing-amount industrial solid waste composite Portland cement and preparation method thereof |
| CN112125544A (en) * | 2020-09-25 | 2020-12-25 | 张延年 | Multi-solid waste coupling portland cement and preparation method thereof |
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| JP2001146455A (en) * | 1999-11-15 | 2001-05-29 | Taiheiyo Cement Corp | Hydraulic composition |
| CN108314340A (en) * | 2018-04-09 | 2018-07-24 | 河南理工大学 | It is a kind of using tailing as sulphoaluminate cement clinker of raw material and preparation method thereof |
| CN108516709A (en) * | 2018-04-09 | 2018-09-11 | 河南理工大学 | It is a kind of using Pb-Zn tailings as sulphoaluminate cement clinker of raw material and preparation method thereof |
| CN109053006A (en) * | 2018-10-24 | 2018-12-21 | 河南理工大学 | It is a kind of using Tungsten tailing as sulphoaluminate cement clinker of raw material and preparation method thereof |
| CN109293260A (en) * | 2018-10-24 | 2019-02-01 | 河南理工大学 | It is a kind of using copper tailing as sulphoaluminate cement clinker of raw material and preparation method thereof |
| CN109320110A (en) * | 2018-10-24 | 2019-02-12 | 河南理工大学 | It is a kind of using sulphur tailing as sulphoaluminate cement clinker of raw material and preparation method thereof |
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2019
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| JP2001146455A (en) * | 1999-11-15 | 2001-05-29 | Taiheiyo Cement Corp | Hydraulic composition |
| CN108314340A (en) * | 2018-04-09 | 2018-07-24 | 河南理工大学 | It is a kind of using tailing as sulphoaluminate cement clinker of raw material and preparation method thereof |
| CN108516709A (en) * | 2018-04-09 | 2018-09-11 | 河南理工大学 | It is a kind of using Pb-Zn tailings as sulphoaluminate cement clinker of raw material and preparation method thereof |
| CN109053006A (en) * | 2018-10-24 | 2018-12-21 | 河南理工大学 | It is a kind of using Tungsten tailing as sulphoaluminate cement clinker of raw material and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111153612A (en) * | 2020-01-03 | 2020-05-15 | 陕西北元化工集团股份有限公司 | Industrial waste residue low-heat portland cement and preparation method thereof |
| CN111499232A (en) * | 2020-05-08 | 2020-08-07 | 张延年 | Large-mixing-amount industrial solid waste composite Portland cement and preparation method thereof |
| CN112125544A (en) * | 2020-09-25 | 2020-12-25 | 张延年 | Multi-solid waste coupling portland cement and preparation method thereof |
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| CN110451823B (en) | 2022-02-18 |
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