CN103553392A - Preparation method of active admixture of copper tailings - Google Patents
Preparation method of active admixture of copper tailings Download PDFInfo
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- CN103553392A CN103553392A CN201310528611.9A CN201310528611A CN103553392A CN 103553392 A CN103553392 A CN 103553392A CN 201310528611 A CN201310528611 A CN 201310528611A CN 103553392 A CN103553392 A CN 103553392A
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- copper tailings
- cement
- copper
- mixed material
- tailings
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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
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Abstract
The invention discloses a preparation method of an active admixture of copper tailings, and relates to the technical field of processing of building materials. The preparation method is simple, less in energy consumption, and free of pollution. The method comprises the following steps: putting the copper tailings into a microwave thermal meter to irradiate for 2-4 minutes; putting the irradiated copper tailings into a mill and grinding for 5-15 minutes until the specific surface area is 420 m<2>/kg, so as to prepare the active admixture of the copper tailings; doping 10-30wt% of active admixture of the copper tailings and 4wt% of desulfurized gypsum in common portland cement; evenly mixing, so as to prepare the composite portland cement which achieves 52.5-level strength of the national standard. By implementing the method, the dosage of cement clinker is reduced; the strength grade of the cement is improved; the hydration heat of the cement is reduced; the sulfate attack resistance is enhanced; the problems of pile-up and pollution of the copper tailings are solved, so that the copper tailings are utilized as resources.
Description
Technical field
The present invention relates to a kind of material of construction processing technique field, particularly a kind of preparation method of copper tailings active mixed material.
Background technology
Along with adjustment and the expanding economy of national policy, Chinese architecture industry constantly strengthens the pulling function of national economy, has become national economy mainstay industry.Silicate cement, as one of three large basic materials of building industry, is the gelling material of current usage quantity maximum.Within 2012, China's cement output reaches 21.84 hundred million tons, but domestic approximately 64,300,000,000 tons of the Wingdale reserves of having verified will face exhausted crisis as the main raw material(s) of producing cement in 30 years.Therefore, cement mixture and the complementary gelling material of research, development of new environmental protection, reduce to a certain extent the consumption of cement clinker, to reduce resource, energy consumption, improve comprehensive utilization of resources rate, reduce the effective way of environmental pollution, to promoting resources circulation pattern, the road of walking Ecodevelopment is significant.Copper tailings is the Powdered waste residue producing in copper ore dressing technique, and according to statistics, 1 ton of copper of every production will produce 2.2 tons of copper tailings, and the volume of cargo in storage of China's copper tailings is about 2,500,000,000 tons at present.A large amount of copper tailings is not only piled up and is taken valuable land resources, and severe contamination air, water body and soil, becomes significant problem urgently to be resolved hurrily.At present, the utilization of copper tailings in cement, mainly concentrates on and is replaced part of clay raw material cement baking and be that blended material is applied in cement by copper tailings.The gordian technique being applied to copper tailings as blended material in cement is the lateral reactivity that how fully to excite copper tailings.Patent CN1267372C discloses a kind of method of utilizing copper mine tailing to prepare cement, adopts solidifying agent to mix with the ratio of 3:7 with copper mine tailing, and the 28 days ultimate compression strength of cement making is greater than 42.5MPa; Fu Jiangsheng etc., in " experimental study of Geopolymeric Cement Prepared by Tailings of Copper Ore " literary composition, have discussed and have adopted 620 ℃ of calcinings, insulation 2h method to process copper tailings, and its pozzolanic activity is improved; Tang Da is high in " applied research of copper mine tailing in manufacture of cement " literary composition, has narrated the test by external excitation agent copper tailings activity.The method that high-temperature calcination copper tailings is prepared active mixed material exists energy consumption large, and can produce the problem of secondary pollution, and the activation effect of copper tailings is poor; The method of chemi-excitation, pharmaceutical chemicals price used is higher, and during use, processing requirement is high, and has the problems such as irregular that stir.
Summary of the invention
The object of the invention is to overcome above deficiency, a kind of preparation method of copper tailings active mixed material be provided, preparation process power consumption less, environment friendly and pollution-free, tooling cost is lower, active Si in the copper tailings active mixed material of making
4+, Al
3+content is high, not containing the objectionable constituent that affect cement, has reduced the consumption of cement clinker, has improved strength of cement grade, reduces hydration heat of cement, strengthens sulphate-corrosion resistance energy.
The technical solution adopted for the present invention to solve the technical problems is: a kind of preparation method of copper tailings active mixed material, comprises the steps:
(1) by copper tailings drying treatment;
(2) dried copper tailings in step (1) is put into microwave thermal technology instrument, irradiation 2min～4min;
(3) by step (2), the copper tailings after microwave exposure is put into grinding machine, and grinding 5min～15min controls grinding to specific surface area 380～450m
2/ kg, obtains copper tailings active mixed material.
In silicate cement, mix the desulfurated plaster of 10wt%～30wt% copper tailings active mixed material and 4wt%, mix more than the composite Portland cement 28d intensity making reaches 52.5MPa.Described desulfurated plaster main component is CaSO
42H
2o, fineness is 1250 orders.
The invention has the beneficial effects as follows: method that the present invention prepares copper tailings active mixed material is simple, production operation process is easy, and power consumption is few, environment friendly and pollution-free, has fully activated the activity of copper tailings, active Si in copper tailings active mixed material
4+, Al
3+content is high.The cement processing by the method, has reduced the consumption of cement clinker, has improved strength of cement grade, has reduced hydration heat of cement, has strengthened sulphate-corrosion resistance energy.By enforcement of the present invention, effectively solved the problem of storing up of copper tailings, reduced environmental pollution, make its recycling.
Embodiment
First the present invention provides a kind of preparation method of copper tailings active mixed material, and active copper tailings blended material can be used as cement mixture, and concrete steps are as follows:
(1) by copper tailings drying treatment;
(2) dried copper tailings in step (1) is put into microwave thermal technology instrument, irradiation 2min～4min;
(3) by step (2), the copper tailings after microwave exposure is put into grinding machine, and grinding 5min～15min controls grinding to specific surface area 380～450m
2/ kg, obtains copper tailings active mixed material.
In ordinary Portland cement, mix the desulfurated plaster of 10wt%～30wt% copper tailings active mixed material and 4wt%, mix the composite Portland cement making and reach 52.5 grades of strength grades of GB.
Below embodiments of the invention:
Embodiment 1
Copper tailings is put into microwave thermal technology instrument, after irradiation 3min, put into ball mill and be milled to specific surface area 420m
2/ kg; Obtain this routine copper tailings active mixed material.With copper tailings active mixed material 10 weight parts, silicate cement 86 weight parts and desulfurated plaster 4 weight parts, mix, make complex cement; By GB175-2007, test its performance, 3d and 28d ultimate compression strength are respectively 52.0MPa and 80.2MPa.With copper tailings active mixed material, be immersed in the NaOH of 1mol/L, detect Si
4+, Al
3+stripping quantity is respectively 49.3mg/g and 54.7mg/g.
Embodiment 2
Copper tailings is put into microwave thermal technology instrument, after irradiation 2.5min, put into ball mill grinding to specific surface area 420m
2/ kg; Obtain this routine copper tailings active mixed material.With copper tailings active mixed material 10 weight parts, silicate cement 86 weight parts and desulfurated plaster 4 weight parts, mix, make complex cement; By GB175-2007, test its performance, 3d and 28d ultimate compression strength are respectively 64.0MPa and 82.0MPa.With copper tailings active mixed material, be immersed in the NaOH of 1mol/L, detect Si
4+, Al
3+stripping quantity is respectively 47.3mg/g and 53.7mg/g.
Embodiment 3
Copper tailings is put into microwave thermal technology instrument, after irradiation 2min, put into ball mill grinding to specific surface area 420m
2/ kg; Obtain this routine copper tailings active mixed material.With copper tailings active mixed material 10 weight parts, silicate cement 86 weight parts and desulfurated plaster 4 weight parts, mix, make complex cement; By GB175-2007, test its performance, 3d and 28d ultimate compression strength are respectively 61.5MPa and 80.2MPa.With copper tailings active mixed material, be immersed in the NaOH of 1mol/L, detect Si
4+, Al
3+stripping quantity is respectively 41.8mg/g and 51.0mg/g.
Embodiment 4
Copper tailings is put into microwave thermal technology instrument, after irradiation 3min, put into ball mill grinding to specific surface area 420m
2/ kg; Obtain this routine copper tailings active mixed material.With copper tailings active mixed material 30 weight parts, silicate cement 66 weight parts and desulfurated plaster 4 weight parts, mix, make complex cement; By GB175-2007, test its performance, 3d and 28d ultimate compression strength are respectively 39.5MPa and 64.2MPa.With copper tailings active mixed material, be immersed in the NaOH of 1mol/L, detect Si
4+, Al
3+stripping quantity is respectively 49.3mg/g and 54.7mg/g.
Embodiment 5
Copper tailings is put into microwave thermal technology instrument, after irradiation 2.5min, put into ball mill grinding to specific surface area 420m
2/ kg; Obtain this routine copper tailings active mixed material.With copper tailings active mixed material 30 weight parts, silicate cement 66 weight parts and desulfurated plaster 4 weight parts, mix, make complex cement; By GB175-2007, test its performance, 3d and 28d ultimate compression strength are respectively 46.6MPa and 69.6MPa.With copper tailings active mixed material, be immersed in the NaOH of 1mol/L, detect Si
4+, Al
3+stripping quantity is respectively 47.3mg/g and 53.7mg/g.
Embodiment 6
Copper tailings is put into microwave thermal technology instrument, after irradiation 2min, put into ball mill grinding to specific surface area 420m
2/ kg; Obtain this routine copper tailings active mixed material.With copper tailings active mixed material 30 weight parts, silicate cement 66 weight parts and desulfurated plaster 4 weight parts, mix, make complex cement; By GB175-2007, test its performance, 3d and 28d ultimate compression strength are respectively 42.8MPa and 62.1MPa.With copper tailings active mixed material, be immersed in the NaOH of 1mol/L, detect Si
4+, Al
3+stripping quantity is respectively 41.8mg/g and 51.0mg/g.
Claims (2)
1. a preparation method for copper tailings active mixed material, is characterized in that: the Powdered waste residue that described copper tailings active mixed material produces in copper ore dressing technique is by drying treatment, microwave exposure, make through grinding machine grinding.
2. the preparation method of a kind of copper tailings active mixed material according to claim 1, is characterized in that: comprise the steps:
(1) by copper tailings drying treatment;
(2) dried copper tailings in step (1) is put into microwave thermal technology instrument, irradiation 2min～4min;
(3) by step (2), the copper tailings after microwave exposure is put into grinding machine, grinding 5min～15min, and controlling its specific surface area is 380～450m
2/ kg, obtains copper tailings active mixed material.
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| CN103553392B CN103553392B (en) | 2015-07-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107244865A (en) * | 2017-06-05 | 2017-10-13 | 山东龙泉管道工程股份有限公司 | High-strength concrete using fines molybdic tailing and barren rock and preparation method thereof |
| CN111116130A (en) * | 2019-12-24 | 2020-05-08 | 江阴硕人节能环保科技有限公司 | Plant growing concrete and preparation method thereof |
| CN113149500A (en) * | 2021-01-13 | 2021-07-23 | 东北大学 | Iron tailing activation mode and multi-solid waste iron tailing concrete |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264441A (en) * | 2008-05-09 | 2008-09-17 | 成都信息工程学院 | Modified steel scoria adsorbent and preparation thereof |
| CN101787431A (en) * | 2010-02-02 | 2010-07-28 | 昆明理工大学 | Method for preparing acid-soluble titanium slag by high titanium slag through microwave irradiation |
-
2013
- 2013-10-25 CN CN201310528611.9A patent/CN103553392B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264441A (en) * | 2008-05-09 | 2008-09-17 | 成都信息工程学院 | Modified steel scoria adsorbent and preparation thereof |
| CN101787431A (en) * | 2010-02-02 | 2010-07-28 | 昆明理工大学 | Method for preparing acid-soluble titanium slag by high titanium slag through microwave irradiation |
Non-Patent Citations (2)
| Title |
|---|
| 周婷婷 等: "铜尾渣在水泥混凝土中资源化利用研究进展", 《混凝土》, no. 284, 27 June 2013 (2013-06-27) * |
| 张长森 等: "微波活化煤矸石反应活性及胶凝性能", 《环境工程学报》, vol. 7, no. 8, 31 August 2013 (2013-08-31), pages 3170 - 3174 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107244865A (en) * | 2017-06-05 | 2017-10-13 | 山东龙泉管道工程股份有限公司 | High-strength concrete using fines molybdic tailing and barren rock and preparation method thereof |
| CN111116130A (en) * | 2019-12-24 | 2020-05-08 | 江阴硕人节能环保科技有限公司 | Plant growing concrete and preparation method thereof |
| CN113149500A (en) * | 2021-01-13 | 2021-07-23 | 东北大学 | Iron tailing activation mode and multi-solid waste iron tailing concrete |
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| CN103553392B (en) | 2015-07-15 |
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Effective date of registration: 20170421 Address after: 224053 Jiangsu province Yancheng City Tinghu District Xinyang Street three Ying Village six group No. 99 (7) Patentee after: YANCHENG JINKAI NEW BUILDING MATERIAL TECHNOLOGY CO., LTD. Address before: 224051 School of materials engineering, Yancheng Institute Of Technology, Yingbin Road, Jiangsu, Yancheng City 9, China Patentee before: Yangcheng Institute of Technology |