CN110282886A - A kind of technique and portland cement preparing portland cement using solid waste - Google Patents
A kind of technique and portland cement preparing portland cement using solid waste Download PDFInfo
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- CN110282886A CN110282886A CN201910694465.4A CN201910694465A CN110282886A CN 110282886 A CN110282886 A CN 110282886A CN 201910694465 A CN201910694465 A CN 201910694465A CN 110282886 A CN110282886 A CN 110282886A
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- Prior art keywords
- portland cement
- solid waste
- calcined
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- ball
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- 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
-
- 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)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses it is a kind of using solid waste prepare portland cement technique and corresponding portland cement, the following steps are included: 1) be sent to raw mill grinding by 0.60~0.80 part of clay-slag or soda waste mud slag, 0.050~0.07 part of aluminium ash, 0.2~0.25 part of mine tailings, 0.02-0.04 ferro-controlling raw material by ratio of weight and the number of copies by proportioning machine and belted electronic balance and moisture be made less than 1.5% raw meal powder；2) calcined by rotary kiln is sent into after being homogenized raw meal powder；3) after having calcined, calcined siccative ball is cooling by cooler；4) after the siccative ball in step 3) has cooled down, siccative ball after cooling is added to the gypsum of 5.0%-7.0%, 15.0%-29.0% mixing material is sent into ball mill and carries out grinding, and different brackets portland cement is made.The present invention prepare portland cement technique and corresponding portland cement, on the one hand improve 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 fields, refer in particular to one or more of solid waste and prepare silicate cement
The technique of mud and corresponding portland cement.
Background technique
There are two types of white clay sources, first is that during soda manufacture, with can generate a large amount of waste liquid, waste liquid in ammonia-soda process alkaline
The alkaline residue generated after filters pressing is commonly called as clay-slag or soda waste mud slag.Black liquor is generated in another paper-making pulping production process to return through alkali
After receiving technical treatment, lime is added in green liquor and carries out causticizing reaction, obtains the sediment of white, as white clay.Paper white sludge
It reacts as follows:
Na2CO3+CaO+H2O=2NaOH+CaCO3↓
Its Main chemical component are as follows:
Generate 6,000,000 tons or more white clays every year according to national statistics, many white clays are stacked naturally or filled, and air certainly will be increased
In dust content, or cause soil and groundwater environmental pollution.Therefore, the processing problem of white clay restricts always soda industry
Further develop with pulping and paper-making, a great problem for needing us to be dedicated to capturing.
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:
According to statistics, 15.3 ten thousand, the existing mine in China, Tailings Dam 12655；2011 15.81 hundred million tons of end of the year mineral products outputs,
Reach within 2012 1600000000 tons, is then further increased to 16.5 hundred million tons within 2013；It is expected that 2015 year end tailing quantitys in stock are up to 17,000,000,000
Ton or more, barren rock volume of cargo in storage is increasing to society, ecology, economic harm up to 46,000,000,000 tons or more.China's tailing is stacked
At least 20,000,000 mu or more of land occupation, will also be continuously increased, many Tailings Dams exceed the time limit or excess load uses, " danger library, sick library,
Three Bian Ku, crown library " to surrounding area life, property and ecology throughout causing to seriously threaten.
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 clay-slag and mine tailings
On the one hand skill and corresponding portland cement improve and takes resource reutilization, on the other hand also solution waste is stored 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 a kind of works that portland cement is prepared using solid waste
Skill, comprising the following steps:
1) by ratio of weight and the number of copies by 0.60~0.80 part of clay-slag or soda waste mud slag, 0.050~0.07 part of aluminium ash,
0.2~0.25 part of mine tailings, 0.02-0.04 ferro-controlling raw material are sent to raw mill powder by proportioning machine and belted electronic balance
Moisture is milled into less than 1.5% raw meal powder；
2) calcined by rotary kiln is sent into after being homogenized raw meal powder；
3) after having calcined, calcined siccative ball is cooling by cooler；
4) after the siccative ball in step 3) has cooled down, siccative ball after cooling is added to the gypsum of 5.0%-7.0%,
15.0%-29.0% mixing material is sent into ball mill and carries out grinding, and different brackets portland cement is made.
Further, each raw material in step 1) is calculated according to proportion, and three rate values control respectively: KH is controlled in 0.89-
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 2), until the temperature of mixture reaches 1350~1450
℃。
Further, siccative ball by cooler is cooled to 80 DEG C or less in step 3).
Further, step 2) sprays into coal ash to rotary kiln by coal injection device, and the amount of participating in of coal ash is 3.0~
5.0%.
Further, the amount of participating in of coal ash is 4.75%.
It is a kind of using solid waste prepare portland cement, the raw material including following weight percent: clay-slag and
0.60~0.80 part of the one or two of soda waste mud slag；
0.050~0.07 part of aluminium ash；
0.2~0.25 part of mine tailings；
0.02-0.04 parts of ferro-controlling raw material；
Gypsum 5.0%-7.0%'s；
Mixing material 15.0%-29.0%；
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 white
Body refuse/soda waste mud slag, aluminium ash, mine tailings, correction material mixed calcining have so that portland cement is made and eliminate solid waste
Object effectively protects local graceful natural ecology living environment；Accelerate utilization of the recycling of renewable resources, turn waste into wealth, changing evil is
The advantages that benefit, pollution administration improves environment, releases 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 solid waste.
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 solid waste, comprising the following steps: by weight
Portion rate grey, 0.2~0.25 part of tailing by 0.60~0.80 part of clay-slag or soda waste mud slag, 0.050~0.07 part of aluminium
Slag, 0.02-0.04 ferro-controlling raw material are calculated according to proportion, carry out electronic proportioning, and three rate value difference KH controls is made to exist
0.89-0.92, SM control are sent to raw mill in 1.3-1.5, by proportioning machine and belted electronic balance in 2.1-2.5, IM control
Raw grinding is carried out, moisture is made less than 1.5% raw meal powder.It is sent into calcined by rotary kiln after raw meal powder is homogenized, calcining 25~
45min, until the temperature of mixture reaches 1350~1450 DEG C；While calcining, coal is carried out by the coal that fuel stockyard provides
Passing through coal injection device after grinder sequence is 3.0~5.0% to coal powder injection, the amount of participating in of coal ash is carried out in rotary kiln.After having calcined, by this
Siccative ball carries out clinker cooling by cooler, is cooled to 80 DEG C or less；Heat when can be cooled down herein to cooler
It is collected, cogeneration is carried out by the heat of collection or is delivered to dryer as grinding heat source；After siccative ball has cooled down,
The gypsum of 5.0%-7.0% will be added in the siccative ball, 15.0%-29.0% mixing material is sent into ball mill together and carries out finished product
Different brackets portland cement, classification storage is made in mill.
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 with white clay CaO value 51.9 below according to the preparation process of the present embodiment, and right
Entire technical process carries out check analysis.Each material proportion data such as table 2:
Each material composition matches data when 2. white clay CaO value 51.9 of table
The Industrial Analysis of coal and coal ash is as shown in table 3:
The Industrial Analysis of 3. coal of table and coal ash
Calculate coal ash incorporation
GA=(q*Ay*S)/(Qy) * 100) (S is dust settling rate)
=(3350*29.56*100)/(20840*100)
=4.75%
Burdening calculation: raw meal proportioning rate value is set as KH=0.89 ± 0.1, SM=2.30 ± 0.1, IM=1.40 ± 0.1
If ∑=97.5%
Then Fe2O3=∑/((2.8KH+1) (IM+1) SM+2.65IM+1.35)
=4.0%
Al2O3=IM*Fe2O3=5.6%
SiO2=SM (Al2O3+Fe2O3)=22.08%
CaO=∑-(SiO2+Al2O3+Fe2O3)=65.82%
The chemical analysis such as table 4 of raw material, clinker.
The chemical composition analysis of 4. raw material of table, clinker
| Title | Match ratio | Loss on ignition | SiO2 | Al2O3 | Fe2O3 | CaO |
| Raw material | 100 | 38.2 | 13.9 | 2.6 | 2.40 | 43.14 |
| Calcination raw material | 20.24 | 4.16 | 3.84 | 69.0 | ||
| Calcination raw material | 96.0 | 19.43 | 3.99 | 3.69 | 66.24 | |
| Coal ash | 4.75 | 2.59 | 1.63 | 0.21 | 0.21 | |
| Clinker | 100 | 22.02 | 5.62 | 3.90 | 66.45 |
It should be noted that free calcium is 1.5% meter.
Checking computations rate value is formed by the clinker of calculating
KH=(C-1.65*A-0.35F)/2.8S=0.905
SM=S/ (A+F)=2.31
IM=A/F=1.44
Acquired results KH, IM, SM can be produced in the present embodiment setting range by this ingredient.
Clinker mineral:
C3S=3.80 (3KH-2) SiO2=59.82
C2S=8.60 (1-KH) SiO2=17.99
C3A=2.65 (Al2O3-0.64Fe2O3=8.27
C4AF=3.04Fe2O=11.86
It is 21.46% according to 75 ﹪ of C3S+C2S > is 77.81%, C3A+C4AF summation in calculating clinker.Mineral total amount
97.94 ﹪ meet the condition of cement portland cement production greater than the requirement of portland cement mineral total amount 95.0%.To sum up
It is described, the preparation process of the present embodiment, can by clay-slag/soda waste mud slag, aluminium ash, mine tailings, correction material mixed calcining with
Portland cement is made.
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 (7)
1. a kind of technique for preparing portland cement using solid waste, it is characterised in that: the following steps are included:
1) by ratio of weight and the number of copies by 0.60~0.80 part of clay-slag or soda waste mud slag, 0.050~0.07 part of aluminium ash, 0.2~
0.25 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；
2) calcined by rotary kiln is sent into after being homogenized raw meal powder；
3) after having calcined, calcined siccative ball is cooling by cooler；
4) after the siccative ball in step 3) has cooled down, siccative ball after cooling is added to the gypsum of 5.0%-7.0%, 15.0%-
29.0% 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 solid waste, it is characterised in that: step 1)
In each raw material calculated according to proportion, three rate values control respectively: KH control is controlled in 0.89-0.92, SM in 2.1-2.5, IM
Control is in 1.3-1.5.
3. the technique according to claim 1 for preparing portland cement using solid waste, it is characterised in that: step 2)
Middle calcination time is 25~45min, until the temperature of mixture reaches 1350~1450 DEG C.
4. the technique according to claim 1 for preparing portland cement using solid waste, it is characterised in that: step 3)
Middle siccative ball is cooled to 80 DEG C or less by cooler.
5. the technique according to claim 1 for preparing portland cement using solid waste, it is characterised in that: step 2)
Coal ash is sprayed into rotary kiln by coal injection device, the amount of participating in of the coal ash is 3.0~5.0%.
6. the technique according to claim 5 for preparing portland cement using solid waste, it is characterised in that: the coal
The amount of participating in of ash is 4.75%.
7. a kind of portland cement prepared using solid waste, which is characterized in that the raw material including following weight percent:
0.60~0.80 part of one or two of clay-slag and soda waste mud slag；
0.050~0.07 part of aluminium ash；
0.2~0.25 part of mine tailings；
0.02-0.04 parts of ferro-controlling raw material；
Gypsum 5.0%-7.0%'s；
Mixing material 15.0%-29.0%；
According to claim 1, the preparation process to any one of 6 carries out the preparation of portland cement.
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| CN202111239454.0A CN113860765A (en) | 2019-07-30 | 2019-07-30 | Method for preparing portland cement by utilizing solid waste |
| CN201910694465.4A CN110282886A (en) | 2019-07-30 | 2019-07-30 | A kind of technique and portland cement preparing portland cement using solid waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114920474A (en) * | 2022-04-21 | 2022-08-19 | 山东大学 | Method for preparing new mineral system high-temperature cement by using aluminum ash and carbide slag |
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| EP1487754B1 (en) * | 2002-03-28 | 2006-04-26 | Council of Scientific and Industrial Research | Process for manufacture of high iron hydraulic cement clinker |
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2019
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- 2019-07-30 CN CN201910694465.4A patent/CN110282886A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114920474A (en) * | 2022-04-21 | 2022-08-19 | 山东大学 | Method for preparing new mineral system high-temperature cement by using aluminum ash and carbide slag |
| CN114920474B (en) * | 2022-04-21 | 2022-11-29 | 山东大学 | Method for preparing new mineral system high-temperature cement by using aluminum ash and carbide slag |
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| CN113860765A (en) | 2021-12-31 |
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Effective date of registration: 20210730 Address after: 365000 No. 303, building 79, Xubi second village, Meilie District, Sanming City, Fujian Province Applicant after: Sanming microcrystalline New Material Technology Co.,Ltd. Address before: 200000 Room 301, third floor, building 1, 3279 Sanlu highway, Minhang District, Shanghai (Hill 5 / 6, block 481, Pujiang town) Applicant before: TONGNAN (SHANGHAI) ENVIRONMENTAL PROTECTIVE MATERIALS Co.,Ltd. |
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Application publication date: 20190927 |