CN104402279A - Preparation technology of tailing ultrafine powder used in cement mixture and concrete admixture - Google Patents
Preparation technology of tailing ultrafine powder used in cement mixture and concrete admixture Download PDFInfo
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- CN104402279A CN104402279A CN201410573044.3A CN201410573044A CN104402279A CN 104402279 A CN104402279 A CN 104402279A CN 201410573044 A CN201410573044 A CN 201410573044A CN 104402279 A CN104402279 A CN 104402279A
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
A preparation technology of tailing ultrafine powder used in cement mixture and concrete admixture includes multi metal tailing compounding, high humidity material conveying, anti blocking feeding, grinding, activator adding, waste heat reutilization, and product storage; and is characterized in that: the compounding control index comprises less than or equal to 12% of water content, less than 3.5% of SO2, and less than or equal to 1.4% of methylene blue value; the anti blocking feeding is performed by using process gas for loosening and a three grate sieve for filtering; a roller-type vertical mill integrating grinding, drying and powder selection in a whole is used; an activator atomization device is arranged at position of 0.5m from an outlet of the vertical mill, the atomized particle size is controlled in 10-30 mum; the waste heat reutilization is arranged at position of 2m from an outlet of an induced draft fan, and when the reutilization rate reaches 50%-60%, 30%-35% of heat consumption cost is saved. The beneficial effects are that: the large dosage comprehensive utilization of tailings can be realized, the problem that high humidity materials are difficult to feed in the process of preparing the tailings into building materials can be solved, the activator utilization efficiency is improved, and the purposes of recycling of low grade waste heat in the mill vertical system, energy saving, emission reduction, and reduction of cost can be realized.
Description
Technical field
The invention belongs to metal tailings technical field of comprehensive utilization, particularly a kind of mine tailing ultra-fine micropowder technology of preparing being used as cement mixture and concrete admixture.
Background technology
Cement and concrete are as one of current topmost civil engineering material, play an important role in economic construction, but cement and the non-renewable resource of a large amount of Wingdale, clay, coal etc. of concrete need of production consumption, discharge the CO of tons of simultaneously
2, SO
2, NO
xin waste gas and dust, resource consumption, the problem such as energy consumption and environmental pollution of its production process are very outstanding.
Mining, ore dressing can produce a large amount of metal tailings, according to statistics, the existing Tailings Dam of China 12655, wherein third-class above large-capacity tailing reservoirs is 533,12122, the small-sized storehouses such as four, five, and tailings impoundment total amount is more than 14,000,000,000 tons, and increasing year by year, storing up of a large amount of mine tailing, not only contaminate environment, destruction ecology, land occupation, waste resource, and there is serious potential safety hazard.The comprehensive utilization of mine tailing is Mine Sustainable Development and the important channel fundamentally administering mine environment, has positive meaning to storage, the fundamentally harm of elimination metal tailings reducing metal tailings.
In existing public technology, cement mixture is related to the comprehensive utilization of metal tailings and there are following two kinds of modes concrete admixture aspect: a kind of is replace part sal raw material as the method for batching of producing cement clinker using metal tailings, as patent of invention CN1657466A " process for calcining cement clinker of silicon dioxide activity adjustment in copper, Pb-Zn tailings ", patent of invention CN1067421A " utilizing copper tailing to produce cement clinker ", its parenchymalia has saved part of clay resource now; Another kind is that metal tailings mixes according to certain weight ratio with gypsum, cement clinker etc., mine tailing is made through grinding, drying and processing, use as active addition of cement, as patent of invention CN1616372A " portland cement of industrial tailing ", disclose a kind of industrial tailings cement technology, it be according to the cement clinker of certainweight proportioning, gypsum and the magnesia mine tailing of treated calcium carry out mixing ovendry power be milled to 80 μm, tail over≤3% to make, the mine tailing specific surface area that this technique is made by above-mentioned standard generally only has 300 ~ 350m
2/ kg, use active low as cement mixture, in cement, directly make its usage quantity of blended material lower than 5%, and required mine tailing is confined to the magnesia mine tailing of calcium, other metal tailings then do not relate to.Patent of invention CN102557497A " a kind of method of preparing high-dosage cement active mixed material from metal tailings ", disclose a kind of mine tailing active addition of cement preparation method, it mixes with metal tailings according to the poly carboxylic acid Alcohol amine type polymer activator of certainweight proportioning, gypsum, and grinding becomes specific surface area to be 400 ~ 800m
2the mine tailing of/kg, use as cement mixture, when usage quantity is within 30%, sand-cement slurry 28d ultimate compression strength and resistance to compression activity index all reach its performance requriements used, and this technology can realize the large dosage comprehensive utilization of mine tailing, but preparation process needs to consume a certain amount of gypsum, certain requirement is had to the mineral composition of mine tailing, prepare energy consumption higher, production cost is higher, and constant product quality is poor simultaneously.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, there is provided a kind of mine tailing ultra-fine micropowder technology of preparing being used as cement mixture and concrete admixture, to reduce the consumption of resource non-renewable to Wingdale, clay, coal etc. in cement and concrete production process and to reduce the environmental problem of corresponding generation.
A kind of mine tailing ultra-fine micropowder technology of preparing being used as cement mixture and concrete admixture of the present invention, its technique comprises: the composite system of multi-metal tailings, large humidity material-transporting system, the large anti-blocking feed system of humidity material, grinding system, exciting agent add-on system, residual heat reutilizing system, product stock system.
1) the composite system of multi-metal tailings: according to composite Con trolling index water ratio≤12% of mine tailing, sulfur trioxide content 53.5%, the requirement of methylene blue number≤1.4%, according to each single mine tailing detected result, carries out composite and homogenizing to multi-metal tailings.
2) large humidity material-transporting system: enter large humidity material-transporting system through composite system multi-metal tailings, this system comprises endless belt conveyor and tramp iron separator, for preventing metal block from entering in mill, endless belt conveyor arranges the deironing of cydariform tramp iron separator.
3) large humidity material anti-clogging plug feed system: enter large humidity material anti-clogging plug feed system through delivery system multi-metal tailings, this system comprises feeding and three grades of sieved filters of castor, feeding adopts process gas to loosen antiplugging apparatus, three grades of castor sieved filter square hole footpaths are respectively 8cm × 8cm, 4cm × 4cm, 2cm × 2cm, and system efficiently solves large humidity material feeding difficulty or ease blockage problem.
4) grinding system: enter grinding system through feed system multi-metal tailings, the employing of this grinding system integrates grinding, dries, selects the roller type vertical mill of powder, through the tailing micro-powder of grinding, carry out drying and selecting powder under the hot gas flow effect that centrifugal blower and hotblast stove produce, specific surface area is 480 ~ 550m
2qualified fine powder between/kg, enter bagroom by air conveyer flume and gather dust, specific surface area is less than 480m
2the meal of/kg returns grinding device and repeats grinding.By controlling the operating parameter of powder separating machine, centrifugal blower, realizing specific surface area is 480m
2the fine powder of/more than kg and specific surface area are 480m
2the meal of/below kg is separated, and controlling grinding device entrance hot air temperature is 250 ~ 350 DEG C, and powder separating machine outlet hot stream temperature is 80 ~ 100 DEG C, powder separating machine outlet material water ratio≤1%.
5) exciting agent add-on system: the exciting agent that the qualified micro mist selected through grinding system sprays with exciting agent add-on system before entering bagroom mixes, wherein exciting agent addition manner adopts atomization to add, point of addition is arranged on air conveyer flume apart from roller type vertical mill outlet 0.5m place, atomized particle size controls at 10 ~ 30 μm, addition is 0.1% ~ 0.15% of tailing micro-powder quality, and system effectively improves exciting agent performance and reaches 3% ~ 5%.
6) residual heat reutilizing system: bag collection is separated 85 ~ 95 DEG C of low temperature hot blasts that carry produced and is drawn by induced draft fan, partially recycled recycling, part enters air through chimney.Waste heat recovery taking-up place is arranged on apart from induced draft fan outlet 2m place, and the waste heat of reuse returns hotblast stove outlet aid distributing pipe, when residual heat recovery rate reaches 50% ~ 60% after adsorption dewatering drying, hear rate cost savings 30% ~ 35%, reach heat recovery, energy-saving and emission-reduction, the object reduced costs.
7) product stock system: the product after bag collection, is delivered to product stock storehouse, and metering is sold.
The invention has the beneficial effects as follows with discarded metal tailings as raw material prepares cement mixture and concrete admixture, its preparation process solves the difficult problem of large humidity material feeding, improve exciting agent utilising efficiency, achieve the heat recovery of vertical mill system middle-low grade, energy-saving and emission-reduction are accomplished, the object reduced costs.In addition, this invention removes mine tailing and pile up the environmental problem brought, mine tailing ultra-fine micropowder product can reduce the consumption of resource non-renewable to Wingdale, clay, coal etc. in cement and concrete production process and reduce the environmental problem of corresponding generation simultaneously.Therefore, the present invention, having considerable economic benefit simultaneously, also has very high social environment benefit.
Accompanying drawing explanation
Fig. 1 is a kind of process flow diagram being used as the mine tailing ultra-fine micropowder technology of preparing of cement mixture and concrete admixture of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1 and embodiment, the present invention is described in detail.
A kind of mine tailing ultra-fine micropowder technology of preparing being used as cement mixture and concrete admixture, its technique comprises, the composite system of multi-metal tailings, large humidity material-transporting system, the large anti-blocking feed system of humidity material, grinding system, exciting agent add-on system, residual heat reutilizing system, product stock system, concrete steps are as follows:
1) the composite system of multi-metal tailings: according to composite Con trolling index water ratio≤12% of mine tailing, sulfur trioxide content≤3.5%, the requirement of methylene blue number≤1.4%, according to single mine tailing detected result, carries out composite and homogenizing to multi-metal tailings.
2) large humidity material-transporting system: enter large humidity material-transporting system through composite system multi-metal tailings, this system comprises endless belt conveyor and tramp iron separator, for preventing metal block from entering in mill, endless belt conveyor arranges the deironing of cydariform tramp iron separator.
3) large humidity material anti-clogging plug feed system: enter large humidity material anti-clogging plug feed system through delivery system multi-metal tailings, this system comprises feeding and three grades of sieved filters of castor, feeding adopts process gas to loosen antiplugging apparatus, and three grades of castor sieved filter square hole footpaths are respectively 8cm × 8cm, 4cm × 4cm, 2cm × 2cm.
4) grinding system: enter grinding system through feed system multi-metal tailings, this system grinding adopts and integrates the roller type vertical mill that powder is selected in grinding oven dry, through the tailing micro-powder of grinding, enter under the hot gas flow effect that centrifugal blower and hotblast stove produce and dry and select powder, specific surface area is 480 ~ 550m
2qualified fine powder between/kg, enter bagroom by air conveyer flume and gather dust, specific surface area is less than 480m
2the meal of/kg returns grinding device and repeats grinding.Realizing specific surface area by the operating parameter of control powder separating machine, centrifugal blower is 480m
2the fine powder of/more than kg and specific surface area are 400m
2the meal of/below kg is separated, and controlling grinding device entrance hot stream temperature is 250 ~ 350 DEG C, and powder separating machine outlet hot stream temperature is 80 ~ 100 DEG C, powder separating machine outlet material water ratio≤1%.
5) exciting agent add-on system: the exciting agent that the qualified micro mist selected through grinding system sprays with exciting agent add-on system before entering bagroom mixes, wherein exciting agent addition manner adopts atomization to add, point of addition is arranged on air conveyer flume apart from roller type vertical mill outlet 0.5m place, atomized particle size controls at 10 ~ 30 μm, addition is 0.1% ~ 0.15% of tailing micro-powder quality, and system effectively improves exciting agent performance and reaches 3% ~ 5%.
6) residual heat reutilizing system: bag collection is separated 85 ~ 95 DEG C of low temperature hot blasts that carry produced and is drawn by induced draft fan, partially recycled recycling, part enters air through chimney.Waste heat recovery taking-up place is arranged on apart from induced draft fan outlet 2m place, and the waste heat of reuse returns hotblast stove outlet aid distributing pipe, when residual heat recovery rate reaches 50% ~ 60% after adsorption dewatering drying, hear rate cost savings 30% ~ 35%, reach heat recovery, energy-saving and emission-reduction, the object reduced costs.
7) product stock system: the product after bag collection, is delivered to product stock storehouse, and metering is sold.
Claims (3)
1. one kind is used as the mine tailing ultra-fine micropowder technology of preparing of cement mixture and concrete admixture, comprise the composite system of multi-metal tailings, large humidity material-transporting system, the large anti-blocking feed system of humidity material, grinding system, exciting agent add-on system, residual heat reutilizing system, product stock system, it is characterized in that, composite Con trolling index is water ratio≤12%, SO
2≤ 3.5%, methylene blue number≤1.4%; Employing process gas is loosened, three grades of anti-blocking feedings of the sieved filter of castor; Employing integrates grinding, dries, selects the roller type vertical mill of powder; Exciting agent atomisation unit is arranged on Vertical Mill outlet 0.5m place, and atomized particle size controls at 10 ~ 30 μm, and addition is 0.1% ~ 0.15% of tailing micro-powder quality; Residual heat recovery is arranged on apart from induced draft fan outlet 2m place, and the waste heat of reuse returns hotblast stove outlet aid distributing pipe after adsorption dewatering drying.
2. a kind of mine tailing ultra-fine micropowder technology of preparing being used as cement mixture and concrete admixture according to claim 1, it is characterized in that, three grades of castor sieved filter square hole footpaths of described large humidity material anti-clogging plug feed system are respectively 8cm × 8cm, 4cm × 4cm, 2cm × 2cm.
3. a kind of mine tailing ultra-fine micropowder technology of preparing being used as cement mixture and concrete admixture according to claim 1, it is characterized in that, the tailing micro-powder of described grinding system, enter under the hot gas flow effect that centrifugal blower and hotblast stove produce and dry and select powder, specific surface area is 480 ~ 550m
2qualified fine powder between/kg, enter bagroom by air conveyer flume and gather dust, specific surface area is less than 480m
2the meal of/kg returns grinding device and repeats grinding; Realizing specific surface area by the operating parameter of control powder separating machine, centrifugal blower is 480m
2the fine powder of/more than kg and specific surface area are 480m
2the meal of/below kg is separated, and controlling grinding device entrance hot stream temperature is 250 ~ 350 DEG C, and powder separating machine outlet hot stream temperature is 80 ~ 100 DEG C, powder separating machine outlet material water ratio≤1%.
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| CN201410573044.3A CN104402279A (en) | 2014-10-24 | 2014-10-24 | Preparation technology of tailing ultrafine powder used in cement mixture and concrete admixture |
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| CN201410573044.3A CN104402279A (en) | 2014-10-24 | 2014-10-24 | Preparation technology of tailing ultrafine powder used in cement mixture and concrete admixture |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105217987A (en) * | 2015-09-04 | 2016-01-06 | 郭心岭 | The complex slag utilizing electric arc furnace restored slag and flyash to produce and preparation technology thereof |
| CN106031895A (en) * | 2015-03-17 | 2016-10-19 | 四平市昊平建材科技有限公司 | Silver mine tailings ultra-fine activated fine powder and preparation technology thereof |
| CN107673644A (en) * | 2017-11-02 | 2018-02-09 | 福建源鑫环保科技有限公司 | A kind of Vertical Mill mineral admixture production line |
| CN108855941A (en) * | 2018-07-26 | 2018-11-23 | 郑州沃特节能科技股份有限公司 | A kind of steel slag micro mist using steel plant's waste heat flue gas selects powder system |
| CN110395956A (en) * | 2019-08-15 | 2019-11-01 | 天津机电职业技术学院 | A kind of building mortar iron tailings micro mist mortar dry powder and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106031895A (en) * | 2015-03-17 | 2016-10-19 | 四平市昊平建材科技有限公司 | Silver mine tailings ultra-fine activated fine powder and preparation technology thereof |
| CN105217987A (en) * | 2015-09-04 | 2016-01-06 | 郭心岭 | The complex slag utilizing electric arc furnace restored slag and flyash to produce and preparation technology thereof |
| CN107673644A (en) * | 2017-11-02 | 2018-02-09 | 福建源鑫环保科技有限公司 | A kind of Vertical Mill mineral admixture production line |
| CN108855941A (en) * | 2018-07-26 | 2018-11-23 | 郑州沃特节能科技股份有限公司 | A kind of steel slag micro mist using steel plant's waste heat flue gas selects powder system |
| CN110395956A (en) * | 2019-08-15 | 2019-11-01 | 天津机电职业技术学院 | A kind of building mortar iron tailings micro mist mortar dry powder and preparation method thereof |
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Application publication date: 20150311 |