CN104844023A - Method for manufacturing mine filling material by curing copper tailing using iron tailing - Google Patents
Method for manufacturing mine filling material by curing copper tailing using iron tailing Download PDFInfo
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- CN104844023A CN104844023A CN201510211899.6A CN201510211899A CN104844023A CN 104844023 A CN104844023 A CN 104844023A CN 201510211899 A CN201510211899 A CN 201510211899A CN 104844023 A CN104844023 A CN 104844023A
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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
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Abstract
The invention relates to a method for manufacturing a mine filling material by curing copper tailing using iron tailing. The method comprises the following steps: firstly selecting the iron tailing, the copper tailing and bauxite and drying and fining; preparing Na2CO3 and KOH powder into a mixed activator according to a mass ratio of 1:2-4 and grinding to be smaller than 200 meshes; mixing 20-30 parts by mass of fined iron tailing, 60-70 parts by mass of copper tailing, 2-8 parts by mass of bauxite and 2-8 parts by mass of mixed activator and uniformly stirring, placing the mixture in a furnace to calcine for 50-80 minutes under the condition of high temperature of 350-650 DEG C, cooling the mixture and then taking out at room temperature, adding water according to the liquid-solid mass ratio of 0.3-0.5:1 and uniformly stirring the mixture into slurry, and pouring into a mold to manufacture the filling material. Through the method, the compressive strength of a prepared test piece can reach 40.2 MPa, the heavy metal leaching toxicity meets the national standard GB5085.3-2007 'Identification standards for hazardous wastes-Identification for extraction toxicity'. By using the method, the comprehensive utilization added value of the iron tailing and the copper tailing is improved, the goaf filling cost is effectively reduced, and the mining region environment is improved.
Description
Technical field
The invention belongs to resource of tailings comprehensive utilization and refuse harmless treatment field, be specifically related to a kind of method utilizing iron tailing solidifying copper tailing to make Mine ventilator material.
Background technology
According to statistics, during 1949-2007, China's copper tailing quantity discharged adds up to 2,400,000,000 tons.During 2007-2011, it is 13.55 hundred million tons that copper tailing amounts to quantity discharged.After 2011, copper tailing discharges every year all more than 200,000,000 tons, and increases year by year.The discharge that annual copper tailing is a large amount of, brings many environmental problems.Wherein the most serious is heavy metal pollution problem, secondly also comprise the chemical agent used in ore dressing process remain in mine tailing and produce new source of pollution with some component generation chemical reaction, the surface water flowing through mine tailing stacking place dissolves some objectionable constituent in mine tailing and is carried transfer and causes wider pollution, tailings pollution region makes Polluted area expand under the effects such as oxidation, hydrolysis and weathering, mine tailing along river, lake stacks direct polluted-water, or the series of problems such as causing river course blocking that caves in.
Iron tailings is a kind of composite minerals raw material, is mainly that iron ore was roughly selected through screening, selected and remaining after scanning waste residue.It is except containing except a small amount of metal, and essential mineral consists of gangue mineral.According to incompletely statistics, the mineral products that current China finds have kind more than 150, and exploitation, foundation, operation more than 8000 mine, add up to produce mine tailing 59.7 hundred million tons.Wherein store up iron tailings amount unexpectedly up to tens00000000, account for nearly 1/3 of whole tailings impoundment total amount, annual discharge iron tailings is close to 300,000,000 tons and comprehensive utilization ratio is less than 20%.At present, along with the development of cement industry, continually developing of natural resources, traditional raw material can not meet the long-range demand with Sustainable development of cement, and seeking new starting material, to carry out alternative traditional material very urgent.Iron tailings is substantially identical with the chemical constitution of cement slurry, a kind of raw material of mine tailing as cement can be utilized in theory, can diffuse into the environment complete problem that iron tailings utilizes scope to solve iron tailings to bring, the diversity simultaneously also can enriching cement producting material is selected.
Under normal circumstances, the casting resin that one ton of ore need backfill 0.25 ~ 0.4 cubic metre or more is often exploited in mine, and thus mine tailing backfill is considered to solve one of effective way that mine tailing excess piles up.At present, mine tailing filling technique is comparatively ripe.Application mine tailing filling mine worked-out section, not only significantly can reduce the mine tailing quantity of accumulation, reduces bargh's filling cost, but also can reduce the rate of dilution and the rate of loss of ore, and the problems simultaneously also making tailings discharging bring are solved.As can be seen from practice, mine tailing replaces traditional casting resin sandstone for large-area worked-out section, filling down-hole, not only solves the economical load that tailings discharging problem alleviates enterprise, and can obtain good economic benefit and social benefit.But at present in mine tailing packing technique; cost, the intensity of stopping composition and the filler problem such as Leaching of Heavy Metals under the local environment of worked-out section of filling restrains the development of this technique always, and finding effective means to address these problems is the key promoting mine tailing backfilling process mass-producing application.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method utilizing iron tailing solidifying copper tailing to make Mine ventilator material.
For achieving the above object, the invention provides following technical scheme:
Utilize iron tailing solidifying copper tailing to make a method for Mine ventilator material, comprise the following steps:
(1) iron tailings, copper tailing and bauxitic clay, is got and dry refinement;
(2), according to quality meter, get iron tailings 20 ~ 30 parts that step (1) obtains, copper tailing 60 ~ 70 parts, bauxitic clay 2 ~ 8 parts and mixing excitation agent 2 ~ 8 parts mixing, then by mixture high-temperature calcination 50 ~ 80min under 350 ~ 650 DEG C of conditions, after thing temperature to be mixed is reduced to room temperature (18 ~ 25 DEG C), add water with liquid-solid mass ratio 0.3 ~ 0.5:1 to mixture and stir into muddy, reenter molded block and form Mine ventilator material, described mixing excitation agent is Na
2cO
3with KOH powder with the mixing of mass ratio 1:2 ~ 4, granularity is less than 200 orders.
Further, iron tailings, copper tailing and bauxitic clay described in step (1) are dried to moisture and are less than 2%.
Further, the described refinement mode of step (1) adopts mechanical mill 1 ~ 3 hour.
Further, described in step (2), mixing excitation agent is Na
2cO
3mix with mass ratio 1:2 with KOH powder.
Further, described step (3) by mass, get iron tailings 20 parts that step (1) obtains, copper tailing 70 parts, bauxitic clay 2 parts and mixing excitation agent 8 parts mixing, then by mixture high-temperature calcination 60min under 500 ~ 650 DEG C of conditions, after thing temperature to be mixed is reduced to room temperature (18 ~ 25 DEG C), add water with liquid-solid mass ratio 0.4 ~ 0.5:1 to mixture and stir into muddy, reentering molded block and form Mine ventilator material.
Bauxitic clay is also known as alumina or bauxite, and main component is aluminum oxide, is the hydrated aluminum oxide containing impurity, is a kind of earthy mineral.White or canescence are brown Huang or light red because of iron content.
Beneficial effect of the present invention is: the character that (1) the present invention uses iron tailings substantially identical with the chemical constitution of cement slurry, high temperature alkali fuse activation method is adopted to make it form a kind of High Performance Cementitious Material, also the copper tailing of mixing has been carried out effectively fixing in gelling material forming process, adequately achieved iron tailings and use with cooperating of copper tailing; (2) the test specimen uniaxial compressive strength that prepared by the present invention's application iron tailing solidifying copper tailing can reach 40.2MPa, and Leaching Heavy Metals meets standard GB/T 5085.3-2007 " Hazardous wastes judging standard leaching characteristic identification "; (3) the present invention is easy and simple to handle, and feasibility is strong, reduces Filling mine-out area cost, has saved natural resources and energy resources, also improves the value of iron tailings and copper tailings comprehensive utilization to a certain extent.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is the schema utilizing iron tailing solidifying copper tailing to make Mine ventilator material;
Fig. 2 is the impact on the uniaxial compressive strength of made test specimen of different milling time, calcining temperature and liquid-solid ratio;
Fig. 3 is the impact on the copper Leaching of made test specimen of different milling time, calcining temperature and liquid-solid ratio.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
The mensuration of the embodiment 1 different mass made test piece intensity of part blending ratio and Leaching
Iron tailings, copper tailing and bauxitic clay constant temperature drying are less than 2% to moisture, by dry after mine tailing mechanical grinding 2 hours and sieve, by Na
2cO
3mix with mass ratio 1:2 with KOH powder, make mixing excitation agent, and mixing excitation agent is ground to is less than 200 orders, in mass parts, get iron tailings respectively, copper tailing, mixing excitation agent and bauxitic clay (20 parts, 70 parts, 2 parts, 8 parts), (30 parts, 60 parts, 8 parts, 2 parts), (25 parts, 65 parts, 5 parts, 5 parts), (23 parts, 67 parts, 4 parts, 6 parts), (27 parts, 63 parts, 6 parts, 4 parts) 5 groups and stir, the compound sample often organized to be placed in stove high-temperature calcination 60min under 500 DEG C of conditions, be down to after room temperature until in-furnace temperature after having calcined, take out the mixture after activation, add water with liquid-solid mass ratio 0.4:1 to mixture and stir into muddy, carry out into mould solidification clamp dog again, form removal temperature 25 DEG C, maintenance 28 days is carried out under relative humidity more than 90% condition, preparation process is as Fig. 1.By GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) ", compressive strength determination is carried out to test specimen block, carry out Cu Leaching mensuration by HJ/T299-2007 " solid waste-Leaching leaching method-sulfonitric method " to test specimen block, Leaching of Heavy Metals concentration is carried out measuring according to GB5085.3-2007 " Hazardous wastes judging standard leaching characteristic identification " and is judged.Record data are in table 1.
The uniaxial compressive strength of made test specimen and Leaching Heavy Metals value under table 1 different mixing proportion
As seen from Table 1, test specimen 28 days uniaxial compressive strengths obtained under above-mentioned various blending ratio are all greater than 20Mpa, and corresponding Leaching Heavy Metals is all lower than GB5085.3-2007 Hazardous wastes discriminant value.
Embodiment 2 compares the made test piece intensity of mixing excitation agent of preparation and the mensuration of Leaching with different mass
Iron tailings, copper tailing and bauxitic clay constant temperature drying are less than 2% to moisture, by dry after mine tailing mechanical grinding 2 hours and sieve, by Na
2cO
3with KOH powder with mass ratio 1:2, 1:3, 1:4 mixes, make mixing excitation agent respectively, and mixing excitation agent is ground to is less than 200 orders, with 3 kinds of mixing excitation agents of preparation, again in mass parts, get iron tailings respectively, copper tailing, mixing excitation agent and bauxitic clay 20 parts, 70 parts, 2 parts, 8 parts and stir, the compound sample often organized to be placed in stove high-temperature calcination 60min under 500 DEG C of conditions, be down to after room temperature until in-furnace temperature after having calcined, take out the mixture after activation, add water with liquid-solid mass ratio 0.4:1 to mixture and stir into muddy, carry out into mould solidification clamp dog again, form removal temperature 25 DEG C, maintenance 28 days is carried out under relative humidity more than 90% condition, preparation process is as Fig. 1.By GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) ", compressive strength determination is carried out to test specimen block, carry out Cu Leaching mensuration by HJ/T299-2007 " solid waste-Leaching leaching method-sulfonitric method " to test specimen block, Leaching of Heavy Metals concentration is carried out measuring according to GB5085.3-2007 " Hazardous wastes judging standard leaching characteristic identification " and is judged.Record data are in table 2.
Table 2 is with the uniaxial compressive strength of different mass test specimen more made than the mixing excitation agent of preparation and Leaching Heavy Metals value
As seen from Table 2, under three set conditions, test specimen 28 days uniaxial compressive strengths are all greater than 30Mpa, and corresponding Leaching Heavy Metals is all lower than GB5085.3-2007 Hazardous wastes discriminant value.
The orthogonal experiment of test specimen is prepared under embodiment 3 different technology conditions
The present embodiment by orthogonal test, inquires into the impact on made test specimen uniaxial compressive strength and Leaching Heavy Metals of mine tailing milling time, calcining temperature and liquid-solid ratio.Iron tailings, cupric sulfide mine tailing and bauxitic clay constant temperature drying are less than 2% to moisture, and the mine tailing after drying is carried out mechanical mill and sieves, and milling time is set to 1h, 2h and 3h respectively.Na2CO3 and KOH powder is mixed with mass ratio 1:4, makes mixing excitation agent, and mixing excitation agent is ground to is less than 200 orders.Again in mass parts, get respectively iron tailings, copper tailing, mixing excitation agent and bauxitic clay 20 parts, 70 parts, 2 parts, 8 parts and stir, be placed in stove by compound sample and calcine, calcining temperature is set to 350 DEG C, 500 DEG C and 650 DEG C respectively, and calcination time is 60min.Calcine and waited after in-furnace temperature is down to room temperature afterwards, taken out the mixture after activation.With liquid-solid ratio 0.3,0.4 and 0.5, water and mixture are carried out being mixed into muddy respectively, then carry out into mould solidification clamp dog, form removal temperature 25 DEG C, carry out maintenance 28 days under relative humidity more than 90% condition, preparation process is as Fig. 1.By GB/T17671-1999 " Test method for strength of hydraulic cement mortar (ISO method) ", compressive strength determination is carried out to test specimen block, carry out Cu Leaching mensuration by HJ/T299-2007 " solid waste-Leaching leaching method-sulfonitric method " to test specimen block, Leaching of Heavy Metals concentration is carried out measuring according to GB5085.3-2007 " Hazardous wastes judging standard leaching characteristic identification " and is judged.Record data are in table 3.
Table 3 orthogonal test scheme and test-results
As seen from Table 3, in nine groups of tests, test specimen 28 days uniaxial compressive strength Schwellenwerts are 26.7Mpa, meet the requirement of mine tailing fill process all far away, uniaxial compressive strength maximum value is 40.2, higher than the intensity than general cement cementitious test specimen, in all experimental group, the Leaching value of corresponding each metallic element, all lower than GB5085.3-2007 Hazardous wastes discriminant value.
Fig. 2 and Fig. 3 is respectively and calculates each factor of obtaining to the impact of test specimen uniaxial compressive strength and copper Leaching by the result of table 3.From result in figure, under same empirical factor condition, milling time get 2 ~ 3 hours, calcining temperature get 500 DEG C ~ 650 DEG C and liquid-solid ratio gets 0.4 ~ 0.5 time, made test specimen uniaxial compressive strength is comparatively strong and copper Leaching is lower.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (5)
1. utilize iron tailing solidifying copper tailing to make a method for Mine ventilator material, it is characterized in that, comprise the following steps:
(1) iron tailings, copper tailing and bauxitic clay, is got and dry refinement;
(2), according to quality meter, get iron tailings 20 ~ 30 parts that step (1) obtains, copper tailing 60 ~ 70 parts, bauxitic clay 2 ~ 8 parts and mixing excitation agent 2 ~ 8 parts mixing, then by mixture high-temperature calcination 50 ~ 80min under 350 ~ 650 DEG C of conditions, after thing temperature to be mixed is reduced to 18 ~ 25 DEG C, add water with liquid-solid mass ratio 0.3 ~ 0.5:1 to mixture and stir into muddy, reenter molded block and form Mine ventilator material, described mixing excitation agent is Na
2cO
3with KOH powder with the mixing of mass ratio 1:2 ~ 4, granularity is less than 200 orders.
2. utilize iron tailing solidifying copper tailing to make the method for Mine ventilator material according to claim 1, it is characterized in that: iron tailings, copper tailing and bauxitic clay described in step (1) are dried to moisture and are less than 2%.
3. utilize iron tailing solidifying copper tailing to make the method for Mine ventilator material according to claim 1, it is characterized in that: the described refinement mode of step (1) adopts mechanical mill 1 ~ 3 hour.
4. utilize iron tailing solidifying copper tailing to make the method for Mine ventilator material according to claim 1, it is characterized in that: described in step (2), mixing excitation agent is Na
2cO
3mix with mass ratio 1:2 with KOH powder.
5. utilize iron tailing solidifying copper tailing to make the method for Mine ventilator material according to claim 1, it is characterized in that: described step (3) by mass, get iron tailings 20 parts that step (1) obtains, copper tailing 70 parts, bauxitic clay 2 parts and mixing excitation agent 8 parts mixing, then by mixture high-temperature calcination 60min under 500 ~ 650 DEG C of conditions, after thing temperature to be mixed is reduced to 18 ~ 25 DEG C, add water with liquid-solid mass ratio 0.4 ~ 0.5:1 to mixture and stir into muddy, reentering molded block and form Mine ventilator material.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105198346A (en) * | 2015-09-14 | 2015-12-30 | 宿州市金鼎安全技术股份有限公司 | Inorganic filling material |
| CN111485940A (en) * | 2020-03-25 | 2020-08-04 | 桂林理工大学 | Method for backfilling and reclaiming mining pits by using slime and red mud generated by bauxite ore dressing and smelting |
| CN111574082A (en) * | 2020-05-15 | 2020-08-25 | 三明学院 | Preparation method of single-component geopolymer cement |
| CN111995276A (en) * | 2020-09-05 | 2020-11-27 | 昆明理工大学 | Method for solidifying heavy metal in copper tailings by using industrial waste carbide slag and kaolin |
| CN113200688A (en) * | 2021-04-14 | 2021-08-03 | 河南省宜居建材科技有限公司 | Method for preparing cementing material based on comprehensive tailings |
| CN115160015A (en) * | 2022-06-30 | 2022-10-11 | 武钢资源集团程潮矿业有限公司 | Low-silicon iron tailing high-strength ceramsite and preparation method thereof |
| CN116217164A (en) * | 2023-01-10 | 2023-06-06 | 青岛理工大学 | Iron tailing curing agent and use method thereof |
| CN116217195A (en) * | 2022-12-22 | 2023-06-06 | 北京科技大学 | Solid waste-based wet spraying concrete and preparation method and application thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105198346A (en) * | 2015-09-14 | 2015-12-30 | 宿州市金鼎安全技术股份有限公司 | Inorganic filling material |
| CN111485940A (en) * | 2020-03-25 | 2020-08-04 | 桂林理工大学 | Method for backfilling and reclaiming mining pits by using slime and red mud generated by bauxite ore dressing and smelting |
| CN111485940B (en) * | 2020-03-25 | 2021-09-24 | 桂林理工大学 | Method for backfilling and reclaiming mining pits by using slime and red mud generated by bauxite ore dressing and smelting |
| CN111574082A (en) * | 2020-05-15 | 2020-08-25 | 三明学院 | Preparation method of single-component geopolymer cement |
| CN111574082B (en) * | 2020-05-15 | 2022-03-01 | 三明学院 | Preparation method of single-component geopolymer cement |
| CN111995276A (en) * | 2020-09-05 | 2020-11-27 | 昆明理工大学 | Method for solidifying heavy metal in copper tailings by using industrial waste carbide slag and kaolin |
| CN111995276B (en) * | 2020-09-05 | 2021-11-02 | 昆明理工大学 | Method for solidifying heavy metal in copper tailings by using industrial waste carbide slag and kaolin |
| CN113200688A (en) * | 2021-04-14 | 2021-08-03 | 河南省宜居建材科技有限公司 | Method for preparing cementing material based on comprehensive tailings |
| CN115160015A (en) * | 2022-06-30 | 2022-10-11 | 武钢资源集团程潮矿业有限公司 | Low-silicon iron tailing high-strength ceramsite and preparation method thereof |
| CN115160015B (en) * | 2022-06-30 | 2023-09-29 | 武钢资源集团程潮矿业有限公司 | Low-silicon iron tailing high-strength ceramsite and preparation method thereof |
| CN116217195A (en) * | 2022-12-22 | 2023-06-06 | 北京科技大学 | Solid waste-based wet spraying concrete and preparation method and application thereof |
| CN116217164A (en) * | 2023-01-10 | 2023-06-06 | 青岛理工大学 | Iron tailing curing agent and use method thereof |
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| CN104844023B (en) | 2016-08-24 |
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