CN104926161B - A kind of method that cement replacement is formed based on the tailings by roller slag - Google Patents
A kind of method that cement replacement is formed based on the tailings by roller slag Download PDFInfo
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- CN104926161B CN104926161B CN201510141852.7A CN201510141852A CN104926161B CN 104926161 B CN104926161 B CN 104926161B CN 201510141852 A CN201510141852 A CN 201510141852A CN 104926161 B CN104926161 B CN 104926161B
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- tailings
- slag
- iron
- cement replacement
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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
- 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
Abstract
The invention belongs to technical field of resource comprehensive utilization, more particularly to a kind of method that cement replacement is formed based on tailings by roller slag.The goal of the invention of the present invention is to provide a kind of handling process of roller slag tailings, so as to as cement replacement, participate in the preparation of concrete.By being dried, being crushed, being classified to tailings, iron removaling, grinding, re-grading, the again means such as iron removaling, micro mist is produced using roller slag tailings, most slag is not only digested, there is good social benefit, and enterprise is set to have preferable economic benefit, the zero-emission of slag is realized, the pollution of environment is avoided and avoids causing space waste.According to the statistics of inventor, 40 ~ 45 tons of micro mist is produced per hour per table apparatus.
Description
Technical field
The invention belongs to technical field of resource comprehensive utilization, and water is formed based on roller slag tailings more particularly to one kind
The method of mud substitute.
Background technology
Roller slag tailings is waste caused by steel-making, and national output of steel in 2010 reaches 600,000,000 t, produces the t of slag 78,000,000
(being calculated by 13% yield), tailings is after magnetic separation is processed, and discharge steel tailings reaches 40,000,000 t, and tailings utilization rate is relatively low, greatly
Part is all unprocessed directly to stack.Pollution not only is produced to surrounding enviroment, while causes ample resources to waste, is seriously constrained
The recycling economy development of steel mill.
The property such as the chemical composition and structure of tailings and the hydraulicity is used for high-strength concrete for it and provides possibility.Incorporation
Appropriate treated tailings micro mist substitution part of cement, the workability of concrete can be improved, moreover it is possible to improve the cause of its structure
Density and mechanical strength.
Tailings is handled, formation meets concrete requirement, can be to meet each steel mill's need as the product of cement substitute
, development of non-steel industry, to realize that resource maximally utilizes, developed the effective way of building trade.It can also create simultaneously considerable
Economic benefit, to recycling industries and clean production, realize that steel mill is sustainable, it is significant to develop in a healthy way.
The content of the invention
The goal of the invention of the present invention is to provide a kind of handling process of roller slag tailings, so as to as cement
Substitute, participate in the preparation of concrete.
In order to realize this goal of the invention, cement replacement is formed based on we disclosing a kind of tailings by roller slag
Method, comprise the following steps：
（1）By roller slag tailings and gypsum according to mass ratio 95:5 mixing, material is delivered to 2# by 1# belt feeders after mixing
Belt feeder；
（2）Material on 2# belt feeders is delivered to 1# gas flow sizing machines after 1# tramp iron separator iron removalings by 1# elevators；（3）
Material forms fine grained and coarse granule, wherein fine grained is introduced by induced-draught fan after 1# gas flow sizing machines are tentatively dried and are classified
Cyclone cylinder is gathered dust, and coarse granule then enters flow stabilizing weighing cabin；
（4）Coarse granule enters roll squeezer through flow stabilizing weighing cabin, and 1# air current classifyings are delivered to by 1# elevators after progress roll-in
Classification is dried in machine；
（5）The fine grained that 1# gas flow sizing machine secondary sortings go out introduces cyclone cylinder by induced-draught fan and gathered dust, and coarse granule is defeated
Deliver to 3# belt feeders, the coarse granule on 3# belt feeders is back to flow stabilizing weighing cabin after 2# tramp iron separators carry out iron removaling, and through current stabilization
Weighing cabin again returns to roll squeezer and extruded；
（6）The fine grained that 1# gas flow sizing machines sub-elect is brought into after cyclone cylinder is collected by wind-force and removed through 3# tramp iron separators
Iron；
（7）Slag micro powder tube mill system is sent into by air inclined chute after the further iron removaling of fine grained after iron removaling, passed through
Being fully ground for tube mill, ultimately forms micro mist；
（8）It is qualified micro mist to coordinate air inclined chute to concentrate micro mist by bag-type dust equipment；
（9）The micro mist repeat step of not up to qualified micro mist standard（7）~（8）, it is qualified micro mist until obtaining product.
Qualified micro mist and slag micropowder, land plaster and other admixtures are mixed to form slag gelling material, can conduct
Ordinary portland cement uses, and has the advantages that wear-resisting, aquation heat is small, saline-alkaline corrosion-resistant, cheap.
Preferably, 160~170m of fine grained specific surface area that the 1# gas flow sizing machines sub-elect2/kg。
Meanwhile we further define the step（7）Obtained 450 ± 10m of micro mist specific surface area2/ kg, moisture content≤
0.5%th, iron-holder≤1%.
As further preferably, the magnetisable material of our open collection 2# tramp iron separators recovery, this material can conduct
Product slag steel grit uses.
Meanwhile we are still further preferably, the magnetisable material of 3# tramp iron separators recovery is collected, this material can be used as product
Slag comminuted steel shot uses.
After technical scheme disclosed in this invention, the processing of roller slag tailings can be formed cement replacement, simultaneously
Tail metal in the dreg is fully reclaimed, forms byproduct slag steel grit and slag comminuted steel shot with economic value.
Micro mist is produced using roller slag tailings, most slag has not only been digested, has had good social benefit, and make
There is preferable economic benefit in enterprise, realizes the zero-emission of slag, avoids the pollution of environment and avoids causing space waste.Root
According to the statistics of inventor, 40 ~ 45 tons of micro mist is produced per hour per table apparatus.
Brief description of the drawings
Fig. 1 is processing unit schematic diagram.
Embodiment
As shown in figure 1, the method for cement replacement is formed based on a kind of tailings by roller slag disclosed by the invention, including
Following steps：
（1）By roller slag tailings and gypsum according to mass ratio 95:5 mixing, material is delivered to 2# by 1# belt feeders after mixing
Belt feeder；
（2）Material on 2# belt feeders is delivered to 1# gas flow sizing machines 5 after 1# tramp iron separator iron removalings by 1# elevators 4；
（3）Material forms fine grained and coarse granule, wherein fine grained is by induced-draught fan 7 after 1# gas flow sizing machines 5 are tentatively dried and are classified
Introduce cyclone cylinder 6 to be gathered dust, coarse granule then enters flow stabilizing weighing cabin 2；
（4）Coarse granule enters roll squeezer 3 through flow stabilizing weighing cabin 2, and 1# air-flows point are delivered to by 1# elevators 4 after progress roll-in
Classification is dried in level machine 5；
（5）The fine grained that 1# gas flow sizing machine secondary sortings go out introduces cyclone cylinder 6 by induced-draught fan 7 and gathered dust, coarse granule
It is delivered to 3# belt feeders, the coarse granule on 3# belt feeders is back to flow stabilizing weighing cabin 2 after 2# tramp iron separators carry out iron removaling, and through steady
Stream weighing cabin 2 again returns to roll squeezer 3 and extruded；
（6）The fine grained that 1# gas flow sizing machines 5 sub-elect is brought into after cyclone cylinder 6 is collected by wind-force and removed through 3# tramp iron separators
Iron；
（7）Slag micro powder tube mill system 9 is sent into by air inclined chute 13 after the further iron removaling of fine grained after iron removaling, led to
Being fully ground for tube mill is crossed, ultimately forms micro mist；
（8）It is qualified micro mist to coordinate air inclined chute 13 to concentrate micro mist by bag-type dust equipment 12；
（9）The micro mist of not up to qualified micro mist standard passes through the repeat step of 2# elevators 15（7）~（8）, until obtaining product
It is qualified micro mist.
In drawing, the side of induced-draught fan 7 is additionally provided with the dust-precipitator 8 with another induced-draught fan 10, is produced during micro mist is handled
Raw dust collection processing, induced-draught fan 11 are that bag-type dust equipment 12 provides wind-force.Induced-draught fan 14 coordinates air inclined chute 13 to make
With for the offer wind-force of air inclined chute 13.
Step（2）Middle 1# tramp iron separators field strength is adjustable, can carry out flexible modulation according to the change of material properties；Step
（4）The specification of middle roll squeezer：HFCG140-80 roll squeezers, high pressure roller mill design work pressure value are 16MPa, also can be according to rolling
Cylinder slag tailings property uses operating on low voltage mode, reduces the abrasion of roll surface；Step（5）2# tramp iron separators, it is adjustable High-Field
Strong tramp iron separator；Step（7）Middle slag micro powder tube mill system, tube mill specification are 3.5 × 14.5m of Φ, it can be ensured that material is ground
Fully, qualified ratio surface material is reached；Step（8）Middle air inclined chute is air conveyer flume, from air flume failure
Rate is relatively low, and powder carry is more smoothly.
The tramp iron separator used in the present invention is mainly handled material in a manner of scanning, so as to effectively control in micro mist
The content standard of iron.
The magnetic material of 2# tramp iron separators recovery is slag steel grit, and slag steel grit can be used as metal charge to return to production line and carry out circulation profit
With, the full Iron grade of slag steel grit in 85-90%, yield is up to 6-7.5%.
3# tramp iron separators carry out iron removaling again, reclaim a part of magnetic material i.e. slag comminuted steel shot, slag comminuted steel shot can return as metal charge
Retrogradation producing line is recycled, and the full Iron grade of slag comminuted steel shot is in 65-70%, and yield is up to 10-15%.
Described raw material preparation system, slag, gypsum etc. is measured by electronic scale, by slag：Gypsum quality is than 95%：5%
Gas flow sizing machine is fed through elevator after ratio dispensing, iron removaling, enters flow stabilizing weighing cabin above roll squeezer after preliminary drying.
Described drying system, drying system thermal source use boiling type hot-blast stove, and heat force intensity and the thermal efficiency are high；Hot-blast stove
Clinker is spiked into slag at the same time as quality raw materials and carries out grinding, do not produce extra waste residue；It is only to dry hot blast stove system
Vertical building is in mill room front end.
The slag micro powder tube mill system, it is preferred to use Hefei Cement Research Design Institute's HFCG140-80 roll squeezers+
The cement grinding system with roller process of HFV2000 gas flow sizing machine+Φ 3.5 × 14.5m slag micro powders tube mill composition.
450 ± the 10m of micro mist specific surface area obtained by the present invention2/ kg, moisture content≤0.5%, iron-holder≤1%.
Claims (4)
1. the method for cement replacement is formed based on a kind of tailings by roller slag, it is characterized in that, methods described includes following step
Suddenly：（1）By roller slag tailings and gypsum according to mass ratio 95:5 mixing, material is delivered to 2# belts by 1# belt feeders after mixing
Machine；（2）Material on 2# belt feeders is delivered to 1# gas flow sizing machines after 1# tramp iron separator iron removalings by 1# elevators；
（3）Material forms fine grained and coarse granule, wherein fine grained is by air draught after 1# gas flow sizing machines are tentatively dried and are classified
Power traction enters cyclone cylinder and gathered dust, and coarse granule then enters flow stabilizing weighing cabin；
（4）Coarse granule enters roll squeezer through flow stabilizing weighing cabin, and being delivered to 1# gas flow sizing machines by 1# elevators after progress roll-in enters
Row dry classification；
（5）The fine grained that 1# gas flow sizing machine secondary sortings go out introduces cyclone cylinder by induced-draught fan and gathered dust, and coarse granule is delivered to
3# belt feeders, the coarse granule on 3# belt feeders are back to flow stabilizing weighing cabin after 2# tramp iron separators carry out iron removaling, and through flow stabilizing weighing
Storehouse again returns to roll squeezer and extruded；
（6）The fine grained that 1# gas flow sizing machines sub-elect is brought into after cyclone cylinder is collected by wind-force and carries out iron removaling through 3# tramp iron separators；
（7）Slag micro powder tube mill system is sent into by air inclined chute after the further iron removaling of fine grained after iron removaling, ground by pipe
Machine is fully ground, and ultimately forms 450 ± 10m of specific surface area2/ kg, moisture content≤0.5%, the micro mist of iron-holder≤1%；
（8）It is Product-level cement replacement to coordinate air inclined chute to concentrate micro mist by bag-type dust equipment；
（9）The not up to micro mist repeat step of Product-level cement replacement standard（7）~（8）, it is Product-level until obtaining product
Cement replacement；Wherein tramp iron separator is mainly handled material in a manner of scanning.
2. the method for cement replacement is formed based on the tailings according to claim 1 by roller slag, it is characterized in that, it is described
160~170m of fine grained specific surface area that 1# gas flow sizing machines sub-elect2/kg。
3. the method for cement replacement is formed based on the tailings according to claim 1 by roller slag, it is characterized in that, collect
The magnetisable material of 2# tramp iron separators recovery.
4. the method for cement replacement is formed based on the tailings according to claim 1 by roller slag, it is characterized in that, collect
The magnetisable material of 3# tramp iron separators recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510141852.7A CN104926161B (en) | 2015-03-30 | 2015-03-30 | A kind of method that cement replacement is formed based on the tailings by roller slag |
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|---|---|---|---|
| CN201510141852.7A CN104926161B (en) | 2015-03-30 | 2015-03-30 | A kind of method that cement replacement is formed based on the tailings by roller slag |
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| CN104926161A CN104926161A (en) | 2015-09-23 |
| CN104926161B true CN104926161B (en) | 2017-12-15 |
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| CN110773298A (en) * | 2019-10-23 | 2020-02-11 | 迁安威盛固废环保实业有限公司 | Staged grinding method for slag micro powder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544480A (en) * | 2009-04-28 | 2009-09-30 | 莱芜钢铁集团有限公司 | Admixture of active powder of ball milling steel slag tailing slurry and application thereof in preparing concrete |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544480A (en) * | 2009-04-28 | 2009-09-30 | 莱芜钢铁集团有限公司 | Admixture of active powder of ball milling steel slag tailing slurry and application thereof in preparing concrete |
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Effective date of registration: 20201029 Address after: 210039 new building, Zhonghua Gate, Yuhuatai District, Jiangsu, Nanjing Patentee after: NANJING MEIBAO NEW PATTERN BUILD MATERIAL Co.,Ltd. Address before: 210039 new building, Zhonghua Gate, Yuhuatai District, Jiangsu, Nanjing Patentee before: NANJING MEISHAN METALLURGY DEVELOPMENT Co.,Ltd. Patentee before: NANJING MEISHAN STEEL SLAG TREATMENT Co.,Ltd. Patentee before: Shanghai Meishan Iron & steel Co.,Ltd. |
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Address after: 210039 new building, Zhonghua Gate, Yuhuatai District, Jiangsu, Nanjing Patentee after: Baowu huanke Nanjing resources utilization Co.,Ltd. Address before: 210039 new building, Zhonghua Gate, Yuhuatai District, Jiangsu, Nanjing Patentee before: NANJING MEIBAO NEW PATTERN BUILD MATERIAL Co.,Ltd. |
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