CN103553392B - Preparation method of active admixture of copper tailings - Google Patents
Preparation method of active admixture of copper tailings Download PDFInfo
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- CN103553392B CN103553392B CN201310528611.9A CN201310528611A CN103553392B CN 103553392 B CN103553392 B CN 103553392B CN 201310528611 A CN201310528611 A CN 201310528611A CN 103553392 B CN103553392 B CN 103553392B
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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
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, the pulling function of Chinese architectural trade to national economy constantly strengthens, and has become national economy mainstay industry.Silicate cement, as one of the three large basic materials of building industry, is the maximum gelling material of current usage quantity.Within 2012, China's cement output reaches 21.84 hundred million tons, but has domesticly verified Wingdale reserves about 64,300,000,000 tons, will face exhausted crisis as the main raw material(s) producing cement in 30 years.Therefore, the cement mixture of research, development of new environmental protection and complementary gelling material, reduce the consumption of cement clinker to a certain extent, reduce resource, energy consumption, improve comprehensive resource utilization rate, reduce the effective way of environmental pollution, to popularization resources circulation pattern, the road walking Ecodevelopment is significant.Copper tailings is the Powdered waste residue produced in copper ore dressing technique, and according to statistics, often produce 1 ton of copper by generation 2.2 tons of copper tailings, the volume of cargo in storage of current China copper tailings is about 2,500,000,000 tons.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 lateral reactivity how fully exciting copper tailings using copper tailings as the gordian technique that blended material is applied in cement.Patent CN1267372C discloses a kind of method utilizing copper tailing to prepare cement, and adopt solidifying agent to mix with the ratio of 3:7 with copper tailing, obtained cement 28 days ultimate compression strength is greater than 42.5MPa; Fu Jiangsheng etc., in " experimental study of Geopolymeric Cement Prepared by Tailings of Copper Ore " literary composition, discuss employing 620 DEG C calcining, insulation 2h method process copper tailings, its pozzolanic activity are improved; Tang Da is high in " applied research of copper tailing in manufacture of cement " literary composition, describes the test by external excitation agent copper tailings activity.There is energy consumption greatly in the method that high-temperature calcination copper tailings prepares active mixed material, 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 the problems such as irregular are stirred in existence.
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 made
4+, Al
3+content is high, not containing the objectionable constituent affecting cement, decreases the consumption of cement clinker, improves 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) copper tailings dried in step (1) is put into microwave thermal technology instrument, irradiation 2min ~ 4min;
(3) the copper tailings of step (2) after microwave exposure is put into grinding machine, grinding 5min ~ 15min, control grinding to specific surface area 380 ~ 450m
2/ kg, namely obtains copper tailings active mixed material.
In silicate cement, mix the desulfurated plaster of 10wt% ~ 30wt% copper tailings active mixed material and 4wt%, mix obtained composite Portland cement 28d intensity and reach more than 52.5MPa.Described desulfurated plaster main component is CaSO
42H
2o, fineness is 1250 orders.
The invention has the beneficial effects as follows: the present invention prepares that the method for copper tailings active mixed material is simple, production operation process is easy, and power consumption is few, environment friendly and pollution-free, fully have activated the activity of copper tailings, active Si in copper tailings active mixed material
4+, Al
3+content is high.By the cement that the method processes, decrease the consumption of cement clinker, improve strength of cement grade, reduce hydration heat of cement, enhance sulphate-corrosion resistance energy.By enforcement of the present invention, what efficiently solve copper tailings stores up problem, decreases environmental pollution, makes its recycling.
Embodiment
The present invention provide firstly a kind of preparation method of copper tailings active mixed material, and namely active copper tailings blended material can be used as cement mixture, and concrete steps are as follows:
(1) by copper tailings drying treatment;
(2) copper tailings dried in step (1) is put into microwave thermal technology instrument, irradiation 2min ~ 4min;
(3) the copper tailings of step (2) after microwave exposure is put into grinding machine, grinding 5min ~ 15min, control grinding to specific surface area 380 ~ 450m
2/ kg, namely 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 obtained composite Portland cement and reach GB 52.5 grades of strength grades.
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.Mix with copper tailings active mixed material 10 weight part, silicate cement 86 weight part and desulfurated plaster 4 weight part, make complex cement; Test its performance by GB175-2007,3d and 28d ultimate compression strength is respectively 52.0MPa and 80.2MPa.Be immersed in the NaOH of 1mol/L with copper tailings active mixed material, 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.Mix with copper tailings active mixed material 10 weight part, silicate cement 86 weight part and desulfurated plaster 4 weight part, make complex cement; Test its performance by GB175-2007,3d and 28d ultimate compression strength is respectively 64.0MPa and 82.0MPa.Be immersed in the NaOH of 1mol/L with copper tailings active mixed material, 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.Mix with copper tailings active mixed material 10 weight part, silicate cement 86 weight part and desulfurated plaster 4 weight part, make complex cement; Test its performance by GB175-2007,3d and 28d ultimate compression strength is respectively 61.5MPa and 80.2MPa.Be immersed in the NaOH of 1mol/L with copper tailings active mixed material, 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.Mix with copper tailings active mixed material 30 weight part, silicate cement 66 weight part and desulfurated plaster 4 weight part, make complex cement; Test its performance by GB175-2007,3d and 28d ultimate compression strength is respectively 39.5MPa and 64.2MPa.Be immersed in the NaOH of 1mol/L with copper tailings active mixed material, 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.Mix with copper tailings active mixed material 30 weight part, silicate cement 66 weight part and desulfurated plaster 4 weight part, make complex cement; Test its performance by GB175-2007,3d and 28d ultimate compression strength is respectively 46.6MPa and 69.6MPa.Be immersed in the NaOH of 1mol/L with copper tailings active mixed material, 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.Mix with copper tailings active mixed material 30 weight part, silicate cement 66 weight part and desulfurated plaster 4 weight part, make complex cement; Test its performance by GB175-2007,3d and 28d ultimate compression strength is respectively 42.8MPa and 62.1MPa.Be immersed in the NaOH of 1mol/L with copper tailings active mixed material, detect Si
4+, Al
3+stripping quantity is respectively 41.8mg/g and 51.0mg/g.
Claims (1)
1. a preparation method for copper tailings active mixed material, is characterized in that: described copper tailings active mixed material by the Powdered waste residue produced in copper ore dressing technique by drying treatment, microwave exposure, make through grinding machine grinding; Comprise the steps:
(1) by copper tailings drying treatment;
(2) copper tailings dried in step (1) is put into microwave thermal technology instrument, irradiation 2min ~ 4min;
(3) the copper tailings of step (2) after microwave exposure is put into grinding machine, grinding 5min ~ 15min, controlling its specific surface area is 380 ~ 450m
2/ kg, namely obtains copper tailings active mixed material.
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| CN103553392B true CN103553392B (en) | 2015-07-15 |
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Families Citing this family (3)
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| 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 |
|---|
| 微波活化煤矸石反应活性及胶凝性能;张长森 等;《环境工程学报》;20130831;第7卷(第8期);第3170-3174页 * |
| 铜尾渣在水泥混凝土中资源化利用研究进展;周婷婷 等;《混凝土》;20130627(第284期);第55-57,61页 * |
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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 |
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