CN103342491A - Iron tailing-based complex mineral admixture and preparation process thereof - Google Patents

Iron tailing-based complex mineral admixture and preparation process thereof Download PDF

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Publication number
CN103342491A
CN103342491A CN2013102895204A CN201310289520A CN103342491A CN 103342491 A CN103342491 A CN 103342491A CN 2013102895204 A CN2013102895204 A CN 2013102895204A CN 201310289520 A CN201310289520 A CN 201310289520A CN 103342491 A CN103342491 A CN 103342491A
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iron tailings
grinding
mineral admixture
iron
concrete
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CN103342491B (en
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李北星
陈梦义
王威
曾维
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention relates to an iron tailing-based complex mineral admixture and a preparation process thereof. The preparation process comprises the following steps of: respectively drying iron tailing sand, industrial waste slag and limestone till water content is not more than 1% for later use; adding gypsum to match with iron tailings, the industrial waste slag and the limestone after drying, then sending into a ball grinding machine to perform powder grinding, and adding grinding aids during the powder grinding process; and uniformly mixing the obtained iron tailing powder, industrial waste slag powder and limestone powder to obtain the iron tailing-based complex mineral admixture. The iron tailing-based complex mineral admixture disclosed by the invention has the beneficial effects that 1) the iron tailings are matched with other industrial waste slag, the admixture for concrete is prepared by simple mechanical fine grinding, and the performance is better; 2) the performance is good, and the iron tailing-based complex mineral admixture can be used for preparing the concrete with the strength grade of C50-C80; 3) a variety of industrial wastes are scientifically and effectively compounded, the activity and particle size synergy of each component against cement and the concrete can be fully exerted to enable the advantages of all the components to complement each other, and the over-superimposed effect is further realized; and 4) the production process is simple and conductive to industrial production, popularization and application.

Description

Iron tailings based composite mineral blending material and preparation technology thereof
Technical field
The invention belongs to building material technical field, particularly iron tailings recycling, concrete cement and the concrete of relating to is with iron tailings based composite mineral blending material and preparation technology thereof.
Background technology
Mine tailing has become the present quantum of output maximum of China, solid waste that comprehensive utilization ratio is minimum.According to incompletely statistics, China is owing to the mine tailing accumulation volume of cargo in storage that exploitation of mineral resources produces has surpassed 10,000,000,000 t, and at present just with the speed increment about 1,200,000,000 t/a, year fully utilizes quantity not sufficient 200,000,000 t.So low comprehensive utilization ratio is not only a kind of waste of resource, and composing environment grave danger.Domestic and international utilization to mine tailing; mainly comprise products such as producing cement, building sand, gas concrete, building block, non-burning brick, vitrified brick, ceramic wall and floor bricks, vitreous brick, permeable brick, devitrified glass, lagging material; but these added values of product are low, iron tailings utility value and economic benefit far away be effectively played.
Patent of invention CN101121579A " a kind of method of utilizing iron tailings to produce concrete active admixture " discloses a kind of magnetite quartzite sections mine tailing that utilizes and has substituted the method that part slag pulverized powder production coagulation coagulates native active admixture, the active admixture that this technology is produced has greater activity, but iron tailings wherein need be through becoming active admixture by the hydrothermal alternation reaction after the grinding pre-treatment again, alteration reaction process more complicated, be difficult to suitability for industrialized production and alteration agent wherein mainly by Sulfates, Nitrates, carbonate, inorganic salt are formulated in chloride salt and the villiaumite class etc. 14, and the existence of these materials has disadvantageous effect to concrete workability and weather resistance.
It is that main raw material prepares gelling material and is the method that fine aggregate prepares the high-strength structured material of fine concrete with the iron tailings with the iron tailings that patent of invention CN101182141A " a kind of method of utilizing iron tailings to prepare high-strength structured material " and patent of invention CN102658596A " a kind of method of utilizing flyash and iron tailings to prepare the high-strength concrete material " all disclose a kind of, though more than can largely dissolve iron tailings and save natural sandstone of two kinds of technology, but the preparation of iron tailings base iron tailings gelling material needs through three grades of gradient grindings, complicated process of preparation, suitability for industrialized production are difficult to realize.
Patent of invention CN101805139 " producing high performance concrete and compound method thereof with high silicon tailings " discloses a kind of tailings of high silicon iron and has prepared the method for high performance concrete as concrete admixture and alternative partial natural sands, this technology for iron tailings dissolve and concrete in the source of fine aggregate a kind of direction is provided.Yet, in recent years, highlighting day by day of poor, assorted along with China's metal mine resource, thin feature, grinding fineness has generally improved in ore dressing enterprise, and mostly mine tailing is regrinded in the process that remaining valuable component reclaims in to mine tailing, mine tailing meta particle diameter after causing selecting again is down to about 40 μ m by 200 μ m, and these meticulous mine tailings have not been suitable for building sand, and the feasibility that therefore iron tailings is substituted partial natural sands in this technology will be restricted.In addition, what relate in this technology is used for iron tailings to prepare composite blending material for concrete, and its maximum doping quantity in composite blend is 45%, and iron tailings is not high as the adulterant utilization ratio.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of iron tailings based composite mineral blending material and preparation method thereof at above-mentioned prior art, to improve the iron tailings utilization ratio.
The present invention solves the problems of the technologies described above the technical scheme that adopts: iron tailings base mineral admixture, include raw material iron tailings, industrial residue and Wingdale, described industrial residue is slag or phosphorus slag or slag or manganese slag, the shared massfraction of each raw material is: iron tailings 50%-70%, industrial residue 10%-40%, Wingdale 10%-30% also includes the gypsum of the 0%-5% that accounts for the raw material total mass and the grinding aid of 0%-0.05%.
Press such scheme, the shared massfraction of described each raw material is: iron tailings 50%-60%, and industrial residue 20%-30%, Wingdale 10%-20% also includes the gypsum of the 3%-5% that accounts for the raw material total mass and the grinding aid of 0.03%-0.05%.
Press such scheme, the fineness modulus of described iron tailings is that the following particle of 1.81,1.18mm has 94.6%, the mass percent meter.
The preparation technology of iron tailings base mineral admixture comprises the steps:
1) iron tailings sand, industrial residue, Wingdale are dried respectively to moisture≤1%, standby, described industrial residue is slag or phosphorus slag or slag or manganese slag, the shared massfraction of each raw material is: iron tailings 50%-70%, industrial residue 10%-40%, Wingdale 10%-30% also includes the gypsum of the 0%-5% that accounts for the raw material total mass and the grinding aid of 0%-0.05%;
2) the iron tailings sand after will drying is equipped with gypsum and sends into ball mill and carry out grinding, adds grinding aid in the grinding process;
3) industrial residue after will drying is equipped with gypsum and sends into ball mill and carry out grinding, adds grinding aid in the grinding process;
4) Wingdale after will drying is equipped with gypsum and sends into ball mill and carry out grinding, adds grinding aid in the grinding process;
5) with step 2), iron tailings powder, industrial residue powder, the limestone powder of step 3) and step 4) gained mix, and namely gets the iron tailings based composite mineral blending material.
Press such scheme, step 2) iron tailings sand milling to Blain specific surface is 400~800m 2/ kg.
Press such scheme, it is 400-600m that the step 3) industrial residue is milled to Blain specific surface 2/ kg.
Press such scheme, it is 400-800m that the step 4) Wingdale is milled to Blain specific surface 2/ kg.
The invention has the beneficial effects as follows:
1) application of iron tailings sand aspect cement concrete mainly is building sand, be used for cement mixture etc. after cement baking and the special chemistry of process or the thermal treatment, but the raising along with technique of preparing, the iron tailings of discharging is more and more thinner, the difficulty of using it for building sand improves, the present invention is equipped with other industrial residues through simple and mechanical levigate preparation concrete adulterant with iron tailings, and performance is preferable, for iron tailings especially particulate iron ore tailings resources utilization provides another kind of direction;
2) adulterant commonly used is many based on slag, flyash, silicon ash, limestone powder etc. in cement and the concrete, but because of resource-constrained, and slag, silicon ash cost is higher, need other well behaved mineral admixtures of research badly and be used for concrete, the iron tailings based composite mineral blending material of the present invention's preparation, functional, can be used for preparing the concrete that strength grade is C50-C80, for cement concrete provides a kind of novel mineral admixture, can remedy existing cement and concrete and use the rare and not enough of adulterant.
3) scientificlly and effectively that multiple trade waste is compound, give full play to each component to cement and concrete activity and granularity synergy, make it to have complementary advantages, bring super synergistic effect.Be that the iron tailings activity is extremely low, its fine grinding is used as the content that adulterant can increase ultrafine powder in cement and the concrete, bring into play its micro-aggregate filling effect, thereby improve concrete pore structure; Wingdale can increase cement and concrete early strength with its fine grinding as adulterant; Industrial residues such as slag or phosphorus slag or slag or manganese slag can increase cement and concrete later strength with its fine grinding as adulterant.In addition, industrial residue such as iron tailings, slag or phosphorus slag or slag or manganese slag and Wingdale are mixed to different fineness by grinding can optimize the mixture particle grating, makes it reach closestpacking.Therefore, the iron tailings based composite mineral blending material that the present invention makes not only obtains complementation from chemically reactive, and also obtains complementation on grain composition, thereby has improved the use properties of this adulterant, and what make it higher proportion is used for cement and concrete production;
4) the present invention adopts earlier the prepared iron tailings based composite mineral blending material of grinding remix stirring separately, be conducive to the control of each component material fineness, grain composition and the adjustment of prescription, production technique is simple, and it is main raw material that the present invention adopts industrial residue, cost is low, is conducive to suitability for industrialized production and applies.
Description of drawings
Fig. 1 is preparation technology's schema that the present invention prepares the iron tailings based composite mineral blending material.
Embodiment
For a better understanding of the present invention, further illustrate content of the present invention below in conjunction with embodiment, content not only is confined to the following examples.
Be used for cement and concrete iron tailings based composite mineral blending material, specific surface area and quality percentage composition behind each component grinding see Table 1:
The prescription of table 1 iron tailings based composite mineral blending material
Grinding aid is massfraction 〉=75%(purity in the present embodiment) trolamine.
Iron tailings based composite mineral blending material preparation technology of the present invention is as follows:
Earlier iron tailings sand, phosphorus slag, Wingdale are dried respectively to moisture≤1%, the fineness modulus of described iron tailings is that the following particle of 1.81,1.18mm has 94.6%, the mass percent meter.Iron tailings sand after will drying then, phosphorus slag, Wingdale are sent into ball mill respectively and are carried out grinding, are milled to table 1 Blain specific surface respectively, and iron tailings sand, phosphorus slag, Wingdale add trolamine and gypsum respectively in grinding process.At last levigate iron tailings powder, phosphorus slag powder, limestone powder are mixed according to table 1 proportioning raw materials, namely get the iron tailings based composite mineral blending material.
Table 2 is the activity index of each composition material of iron tailings based composite mineral blending material.
Each composition material activity index of table 2 iron tailings based composite mineral blending material
Gained sample in the table 1 is detected with reference to the technical requirements among the JG/T317-2011 " concrete with granulation granulation electric furnace phosphoric slag powder "; it the results are shown in Table 3, and wherein activity index substitutes the standard cement mortar strength of 30% cement and the ratio of benchmark cement mortar strength for the iron tailings based composite mineral blending material.
Table 3 iron tailings base mineral admixture technical feature detected result
As shown in Table 3, the iron tailings base mineral admixture that the present invention makes meets the standard-required of JG/T317-2011, and the iron tailings base mineral admixture that the present invention makes has higher anti-folding activity index, is very beneficial for the raising of concrete flexural strength.
Table 4 is the reactivity coefficient of each iron tailings based composite mineral blending material.Wherein the iron tailings based composite mineral blending material activity index that makes for the present invention of reactivity coefficient and same materials are formed the ratio of the numerical value after each raw material activity index weighted mean down, if reactivity coefficient〉1, then each component of iron tailings base mineral admixture has the super synergistic effect of performance.
Table 4 iron tailings based composite mineral blending material reactivity coefficient
As shown in Table 4, the iron tailings based composite mineral blending material that makes of the present invention has the super synergistic effect of performance.
It is prefabricated to be with the 8 iron tailings base composite blends of embodiment in the table 1 that example preparation C60 concrete is used for railroad sleeper, its test proportioning and the results are shown in Table 5.Wherein water-cement ratio is 0.26, and sand coarse aggregate ratio is 34%, and cement adopts the new PO52.5 ordinary Portland cement of China, and admixture is poly carboxylic acid series water reducer, and rubble grating 5~20mm, sand fineness modulus are 2.8.Conservation system be behind the concrete formation at 20 ℃ of quiet 3h that stop, be with mould maintenance in 55 ℃ of steam (intensification 3h---constant temperature 3h---lower the temperature 3h) then, the intact back form removal of maintenance places the standard curing room maintenance to regulation length of time again.
Table 5 sleeper C60 concrete proportioning and test-results
Be example preparation C80 pump concrete with the 8 iron tailings based composite mineral blending materials of embodiment in the table 1, its test proportioning and the results are shown in Table 6.Wherein water cement ratio is 0.23, and sand coarse aggregate ratio is 38%, and cement adopts the new PO52.5 ordinary Portland cement of China, and admixture is poly carboxylic acid series water reducer, and rubble grating 5~20mm, sand fineness modulus are 2.8.After conservation system was concrete formation 1d form removal, maintenance was to stipulating the length of time in standard curing room.
Table 6 pumping C80 concrete proportioning and test-results
Show that from above-mentioned test situation the iron tailings based composite mineral blending material activity that the present invention makes is higher, can be used for the high-strength concrete preparation.During iron tailings base composite blend equivalent substitution cement 30% that the present invention makes, it is prefabricated to can be used for the C60 concrete sleeper, and equivalent substitution cement 20%~40% o'clock can make C80~C65 pump concrete.

Claims (7)

1. iron tailings base mineral admixture, include raw material iron tailings, industrial residue and Wingdale, described industrial residue is slag or phosphorus slag or slag or manganese slag, the shared massfraction of each raw material is: iron tailings 50%-70%, industrial residue 10%-40%, Wingdale 10%-30% also includes the gypsum of the 0%-5% that accounts for the raw material total mass and the grinding aid of 0%-0.05%.
2. iron tailings base mineral admixture according to claim 1, it is characterized in that the shared massfraction of described each raw material is: iron tailings 50%-60%, industrial residue 20%-30%, Wingdale 10%-20% also includes the gypsum of the 3%-5% that accounts for the raw material total mass and the grinding aid of 0.03%-0.05%.
3. iron tailings base mineral admixture according to claim 1, the fineness modulus that it is characterized in that described iron tailings are that the following particle of 1.81,1.18mm has 94.6%, the mass percent meter.
4. the preparation technology of the described iron tailings base of claim 1 mineral admixture comprises the steps:
1) iron tailings, industrial residue, Wingdale are dried respectively to moisture≤1%, standby, described industrial residue is slag or phosphorus slag or slag or manganese slag, the shared massfraction of each raw material is: iron tailings 50%-70%, industrial residue 10%-40%, Wingdale 10%-30% also includes the gypsum of the 0%-5% that accounts for the raw material total mass and the grinding aid of 0%-0.05%;
2) the iron tailings sand after will drying is equipped with gypsum and sends into ball mill and carry out grinding, adds grinding aid in the grinding process;
3) industrial residue after will drying is equipped with gypsum and sends into ball mill and carry out grinding, adds grinding aid in the grinding process;
4) Wingdale after will drying is equipped with gypsum and sends into ball mill and carry out grinding, adds grinding aid in the grinding process;
5) with step 2), iron tailings powder, industrial residue powder, the limestone powder of step 3) and step 4) gained mix, and namely gets the iron tailings based composite mineral blending material.
5. the preparation technology of iron tailings base mineral admixture according to claim 4 is characterized in that step 2) iron tailings sand milling to Blain specific surface is 400~800m 2/ kg.
6. the preparation technology of iron tailings base mineral admixture according to claim 4 is characterized in that it is 400-600m that the step 3) industrial residue is milled to Blain specific surface 2/ kg.
7. the preparation technology of iron tailings base mineral admixture according to claim 4 is characterized in that it is 400-800m that the step 4) Wingdale is milled to Blain specific surface 2/ kg.
CN201310289520.4A 2013-07-10 2013-07-10 Iron tailings based composite mineral blending material and preparation technology thereof Expired - Fee Related CN103342491B (en)

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Cited By (21)

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CN103819218A (en) * 2014-01-07 2014-05-28 平泉金盛科技发展有限公司 Method for producing aerated concrete block from iron tailings
CN104030593A (en) * 2014-05-30 2014-09-10 山东众森科技股份有限公司 Steel slag/limestone composite admixture for concrete and preparation method thereof
CN104030594A (en) * 2014-05-30 2014-09-10 山东众森科技股份有限公司 Nickel slag and manganese slag concrete compound admixture and preparation method thereof
CN104072046A (en) * 2014-05-30 2014-10-01 山东众森科技股份有限公司 Industrial integrated product of cement and concrete and method for realizing industrial integration of cement and concrete
CN104402335A (en) * 2014-11-14 2015-03-11 中国建筑材料科学研究总院 High-strength concrete employing magnetized reduced roasted iron-beneficiation tailings as admixture
CN105293964A (en) * 2015-12-03 2016-02-03 山东中粉建材股份有限公司 Composite admixture capable of improving durability of ordinary concrete and preparation method of composite admixture
CN105293957A (en) * 2015-12-03 2016-02-03 山东中粉建材股份有限公司 Concrete gel material and preparation method thereof
CN105293965A (en) * 2015-12-03 2016-02-03 山东中粉建材股份有限公司 High-performance concrete composite admixture and preparation method thereof
CN105366975A (en) * 2015-11-30 2016-03-02 武汉天意成再生资源有限公司 Non-calcinated solid waste high-activity mineral admixture and preparation method therefor
CN105948643A (en) * 2016-04-29 2016-09-21 山东众森节能材料有限公司 Stone flour concrete composite admixture and preparation method thereof
CN106869401A (en) * 2017-03-29 2017-06-20 河北建筑工程学院 A kind of iron tailing concrete normal concrete combination beam and its construction method
CN107010861A (en) * 2017-05-03 2017-08-04 张铁军 A kind of multi-functional compound mixing material and its preparation technology and application
CN107032646A (en) * 2017-04-20 2017-08-11 金圆水泥股份有限公司 A kind of utilization cement kiln synergic processing coal tar slag, waste active carbon, slag, the method for iron tailings
CN109678405A (en) * 2019-01-23 2019-04-26 林瑞云 A kind of tailing base special concrete and preparation method thereof
CN110372247A (en) * 2019-08-27 2019-10-25 江苏金木土科技有限公司 A kind of concrete admixture and preparation method thereof based on iron tailings powder
CN110885203A (en) * 2019-11-20 2020-03-17 北京建筑材料科学研究总院有限公司 Composite mineral admixture and preparation method thereof
CN111072325A (en) * 2019-12-19 2020-04-28 江苏盐砼新材料科技有限公司 Easy-flowing type composite mineral admixture, preparation method thereof and mortar prepared by adopting admixture
CN111187010A (en) * 2020-01-10 2020-05-22 安徽马钢嘉华新型建材有限公司 Novel clinker-free high-performance low-cost composite cementing material
CN111298908A (en) * 2019-12-27 2020-06-19 江苏融达新材料股份有限公司 Production process for mixing and grinding steel slag, lithium slag, furnace slag and stone powder
CN112094061A (en) * 2020-09-16 2020-12-18 张延年 Iron tailing based concrete admixture and preparation method thereof
CN112125557A (en) * 2020-09-25 2020-12-25 张延年 Iron-containing tailing multi-solid waste coupling admixture and preparation method thereof

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CN111298908A (en) * 2019-12-27 2020-06-19 江苏融达新材料股份有限公司 Production process for mixing and grinding steel slag, lithium slag, furnace slag and stone powder
CN111187010A (en) * 2020-01-10 2020-05-22 安徽马钢嘉华新型建材有限公司 Novel clinker-free high-performance low-cost composite cementing material
CN112094061A (en) * 2020-09-16 2020-12-18 张延年 Iron tailing based concrete admixture and preparation method thereof
CN112125557A (en) * 2020-09-25 2020-12-25 张延年 Iron-containing tailing multi-solid waste coupling admixture and preparation method thereof

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