CN101333102B - Sintered porous brick from skarn type magnetite tailings and method for preparing same - Google Patents
Sintered porous brick from skarn type magnetite tailings and method for preparing same Download PDFInfo
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- CN101333102B CN101333102B CN2008101387552A CN200810138755A CN101333102B CN 101333102 B CN101333102 B CN 101333102B CN 2008101387552 A CN2008101387552 A CN 2008101387552A CN 200810138755 A CN200810138755 A CN 200810138755A CN 101333102 B CN101333102 B CN 101333102B
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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
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention provides a porous brick made from skarn magnetite and coal gangue as materials through sintering and a preparation method thereof; the components of the porous brick comprise 75-85% of hedenbergite, 7-11% of forsterite, 3-5% of tricalcium aluminate, 1-3% of, free cristobalite, 1-3% of ferric sodium sulfate, and 2-4% of glass phase. The preparation method comprises the following steps: the skarn magnetite tailings and the coal gangue with the particle size less than 3mm are mixed together based on a 70-75:25-30 mass percentage, wherein, the particle size of the magnetite tailings is less than 0.5mm, and more than 67% of the magnetite tailings particle sizes are less than 0.074 mm; the average particle size of the magnetite tailings is 0.043-0.05mm, and the viscous size fraction content is not less than 15%; the plasticity index of the tailings is 8 to12; the mixture is staled for 12-24 hours; the staled mud is extruded through vacuum plastic extrusion to prepare the series porous brick adobe which is then dried to make the moisture content less than 2%; the dried adobe is fired for 26 to 28 hours at 1110-1160 DEG C so as to prepare the skarn magnetite tailings sintered porous brick. The compressive strength of the prepared porous brick is 20-35MPa; the appearance and performance of the product can meet the technical indicator requirements of high-class products in GB13544-2000.
Description
Technical field
The invention provides a kind of sintered porous brick from skarn type magnetite tailings and preparation method thereof, belong to sintered perforated brick fabricating technology field.
Background technology
Skarn type magnetite mine tailing is the mine waste residue after the exploitation of iron ore process, the ore dressing, and it mainly consists of mineral such as hedenbergite, calcite, iron forsterite, chlorite, mica, pyrite, sodium magnesium feldspar, and loss on ignition is less than 14%.
At present, domestic utilization research great majority to the type mine tailing rest on mine tailing and add cement, lime, make Dinas brickes, twoly exempt from brick or add clay and make on the level of vitrified brick.Because skarn type magnetite mine tailing calcic, magnesium are higher, contain a large amount of easy-weathering mineral such as chlorite simultaneously, alkali-aggregate reaction takes place in the goods of cementaceous, there is serious weathering problem simultaneously, so mine tailing adds cement, the resulting Dinas brickes of lime, two weather resistance of exempting from brick is very poor.If by high temperature sintering, make raw material generation solid state reaction, can solve the endurance issues of unburned goods.But because calcium, magnesium, the iron level height of such raw material are the firing temperature height (1150～1170 ℃) of feedstock production vitrified brick by mine tailing, sintering range has only 20 ℃, can't realize industrial production.Based on the existence of the problems referred to above and the influence of other factors, what also do not form at present the type mine tailing rationally utilizes technology, does not form corresponding industry, has caused the bulk deposition of mine tailing, bring serious potential safety hazard and environmental pollution, seriously restricted the Sustainable development of bargh.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can address the above problem, realize that the skarn type magnetite mine tailing of utilization of waste material prepares sintered perforated brick and preparation method thereof.Its technical scheme is:
A kind of sintered porous brick from skarn type magnetite tailings is characterized in that the main component of perforated brick is by mass percentage: hedenbergite 75～85%, forsterite 7～11%, tricalcium aluminate 3～5%, free cristobalite 1～3%, sodium sulfate iron 1～3%, glassy phase 2～4%.
A kind of method for preparing sintered porous brick from skarn type magnetite tailings, may further comprise the steps: (1) batching, (2) moulding, (3) drying, (4) sintering, it is characterized in that: in step (1), with skarn type magnetite mine tailing and granularity less than the 3mm coal gangue with 70～75: 25～30 mass percent mixes, wherein the granularity of mine tailing is less than 0.5mm, and the mine tailing granularity more than 67% is less than 0.074mm, the mean particle size of mine tailing is 0.043～0.05mm, its viscosity grain size content is not less than 15%, the mine tailing plasticity index is 8～12, mixes the back and makes old pug in old 12～24 hours; In the step (2) old good pug is extruded through vacuum plasticity, prepared serial perforated brick base substrate; Step (3) makes the water ratio of base substrate less than 2%; Base substrate in the step (4) that drying is good was fired 26～28 hours under 1110 ℃～1160 ℃ temperature, made sintered porous brick from skarn type magnetite tailings.
The described method for preparing sintered porous brick from skarn type magnetite tailings, skarn type magnetite mine tailing is that the skarn type magnetic iron ore reclaims the mud behind the valuable mineral through pulverizing, ore grinding, flotation, magnetic separation successively, by filter cake concentrated, the press filtration gained, its water content is 24%～26%.
The described method for preparing sintered porous brick from skarn type magnetite tailings, the essential mineral of skarn type magnetite mine tailing consist of hedenbergite, calcite, iron forsterite, chlorite, mica, pyrite, sodium magnesium feldspar etc., and loss on ignition is less than 14%.
Water accounts 16～20% in the old pug of preparation in the described method for preparing sintered porous brick from skarn type magnetite tailings, step (1), old pug plasticity index is 10～13.
The present invention compared with prior art has following advantage:
1, need not to add cement or lime, solidify the perforated brick of preparation like this through high temperature sintering, solved in original technology because of mine tailing adds cement, lime causes the very poor problems of durability of product such as the existing chlorite weathering of goods, alkali-aggregate reaction, serious scum;
2, with the coal gangue be batching, solved the problem that firing range is narrow, firing temperature is higher that calcium in original mine tailing, magnesium, iron level height cause, such mine tailing recycling is become a reality, reach economize the land resource, the purpose of mine tailing and two kinds of slag comprehensive utilizations of waste materials of coal gangue, environmental protection;
3, make perforated brick and have intensity height, performance is good, cost is low, product type can be regulated as requested characteristics, and production technique is simple, the yield rate height, the suitability for industrialized production of the materials for wall of suitable especially industrial civil building is the high-quality substitute products of clay brick and colliery wastes brick.
Embodiment
Embodiment 1
1. prepare burden: mine tailing is that the skarn type magnetic iron ore is successively through pulverizing, ore grinding, flotation, the mud behind the valuable mineral is reclaimed in magnetic separation, by concentrating, the filter cake of press filtration gained, its water content is 25%, the essential mineral that the essential mineral of mine tailing consists of skarn type magnetite mine tailing consists of hedenbergite, calcite, the iron forsterite, chlorite, mica, pyrite, sodium magnesium feldspar etc., loss on ignition is less than 14%, the granularity of mine tailing is less than 0.5mm, and the mine tailing granularity more than 67% is less than 0.074mm, the mean particle size of mine tailing is 0.043mm, its viscosity grain size content is 19%, the mine tailing plasticity index is 8, mine tailing and granularity are mixed less than the coal gangue of the 3mm mass percent with 70: 30, old 24 hours, promptly making the pug plasticity index was 13, water content is 20% old pug.
2. moulding: old good pug is extruded on vacuum extruder, and cutting obtains base substrate.
3. with body drying, make its water ratio less than 2%.
4. burn till: with dried base substrate under 1120 ℃～1160 ℃ the temperature, burn till under 28 hours the condition, making its main component of sintered perforated brick of the present invention is by mass percentage: hedenbergite 75%, forsterite 9%, tricalcium aluminate 5%, free cristobalite 3%, sodium sulfate iron 3%, glassy phase 4%.
Through check, the technical indicator of the product that makes is: mean compressive strength 33MPa, all the other indexs meet the requirement of GB 13544～2000 " sintered perforated brick " premium grads.
Embodiment 2:
1. prepare burden: mine tailing is that the skarn type magnetic iron ore is successively through pulverizing, ore grinding, flotation, the mud behind the valuable mineral is reclaimed in magnetic separation, by concentrating, the filter cake of press filtration gained, its water content is 25%, the essential mineral that the essential mineral of mine tailing consists of skarn type magnetite mine tailing consists of hedenbergite, calcite, the iron forsterite, chlorite, mica, pyrite, sodium magnesium feldspar etc., loss on ignition is less than 14%, the granularity of mine tailing is less than 0.5mm, and the mine tailing granularity more than 67% is less than 0.074mm, the mean particle size of mine tailing is 0.043mm, its viscosity grain size content is 19%, the mine tailing plasticity index is 8, mine tailing and granularity are mixed less than the coal gangue of the 3mm mass percent with 70: 30, old 24 hours, promptly making the pug plasticity index was 13, water content is 18% old pug.
2. moulding: old good pug is extruded on vacuum extruder, and cutting obtains base substrate.
3. with body drying, make its water ratio less than 2%.
4. burn till: with dried base substrate under 1110 ℃～1150 ℃ the temperature, burn till under 26 hours the condition, make sintered perforated brick of the present invention, its main component is by mass percentage: hedenbergite 80%, forsterite 8%, tricalcium aluminate 4%, free cristobalite 2%, sodium sulfate iron 2%, glassy phase 3%.
Through check, the technical indicator of the product that makes is: mean compressive strength 28MPa, all the other indexs meet the requirement of GB 13544～2000 " sintered perforated brick " premium grads.
Embodiment 3:
1. prepare burden: mine tailing is that the skarn type magnetic iron ore is successively through pulverizing, ore grinding, flotation, the mud behind the valuable mineral is reclaimed in magnetic separation, by concentrating, the filter cake of press filtration gained, its water content is 25%, the essential mineral that the essential mineral of mine tailing consists of skarn type magnetite mine tailing consists of hedenbergite, calcite, the iron forsterite, chlorite, mica, pyrite, sodium magnesium feldspar etc., loss on ignition is less than 14%, the granularity of mine tailing is less than 0.5mm, and the mine tailing granularity more than 67% is less than 0.074mm, the mean particle size of mine tailing is 0.043mm, its viscosity grain size content is 19%, the mine tailing plasticity index is 8, mine tailing and granularity are mixed less than the coal gangue of the 3mm mass percent with 75: 25, old 24 hours, promptly making the pug plasticity index was 13, water content is 17% old pug.
2. moulding: old good pug is extruded on vacuum extruder, and cutting obtains base substrate.
3. with body drying, make its water ratio less than 2%.
4. burn till: with dried base substrate under 1120 ℃～1150 ℃ the temperature, burn till under 26 hours the condition, make sintered perforated brick of the present invention, its main component is by mass percentage: hedenbergite 85%, forsterite 7%, tricalcium aluminate 3%, free cristobalite 1%, sodium sulfate iron 2%, glassy phase 2%.
Through check, the technical indicator of the product that makes is: mean compressive strength 23MPa, all the other indexs meet the requirement of GB 13544-000 " sintered perforated brick " premium grads.
Claims (5)
1. one kind is the perforated brick that raw material is made through sintering with skarn type magnetite and coal gangue, the composition that it is characterized in that perforated brick is by mass percentage: hedenbergite 75～85%, forsterite 7～11%, tricalcium aluminate 3～5%, free cristobalite 1～3%, sodium sulfate iron 1～3%, glassy phase 2～4%.
2. preparation method with skarn type magnetite and the coal gangue perforated brick that to be raw material make through sintering, may further comprise the steps: (1) batching, (2) moulding, (3) drying, (4) sintering, it is characterized in that: in step (1), with skarn type magnetite mine tailing and granularity less than the 3mm coal gangue with 70～75: 25～30 mass percent mixes, wherein the granularity of mine tailing is less than 0.5mm, and the mine tailing granularity more than 67% is less than 0.074mm, the mean particle size of mine tailing is 0.043～0.05mm, its viscosity grain size content is not less than 15%, the mine tailing plasticity index is 8～12, mixes the back and makes old pug in old 12～24 hours; In the step (2) old good pug is extruded through vacuum plasticity, prepared serial perforated brick base substrate; Step (3) makes the water ratio of base substrate less than 2%; Base substrate in the step (4) that drying is good was fired 26～28 hours under 1110 ℃～1160 ℃ temperature, made sintered porous brick from skarn type magnetite tailings.
As described in the claim 2 with the preparation method of skarn type magnetite and the coal gangue perforated brick that to be raw material make through sintering, it is characterized in that: skarn type magnetite mine tailing is that the skarn type magnetic iron ore reclaims the mud behind the valuable mineral through pulverizing, ore grinding, flotation, magnetic separation successively, by filter cake concentrated, the press filtration gained, its water content is 24%～26%.
As described in the claim 2 with the preparation method of skarn type magnetite and the coal gangue perforated brick that to be raw material make through sintering, it is characterized in that: the mineral composition of skarn type magnetite mine tailing is hedenbergite, calcite, iron forsterite, chlorite, mica, pyrite, sodium magnesium feldspar, and loss on ignition is less than 14%.
As described in the claim 2 with the preparation method of skarn type magnetite and the coal gangue perforated brick that to be raw material make through sintering, it is characterized in that: water accounts 16～20% in the old pug of preparation in the step (1), old pug plasticity index is 10～13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008101387552A CN101333102B (en) | 2008-07-31 | 2008-07-31 | Sintered porous brick from skarn type magnetite tailings and method for preparing same |
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| CN2008101387552A CN101333102B (en) | 2008-07-31 | 2008-07-31 | Sintered porous brick from skarn type magnetite tailings and method for preparing same |
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| CN101333102B true CN101333102B (en) | 2011-05-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390944B (en) * | 2011-07-29 | 2013-01-02 | 武汉理工大学 | Gradation design method of tailing autoclaved bricks |
| CN103265265B (en) * | 2013-04-25 | 2015-01-21 | 四川海吉尔环保科技开发有限公司 | Preparation methods of silicalite and industrial puffed silicalite |
| CN104803658A (en) * | 2015-04-27 | 2015-07-29 | 苏州统明机械有限公司 | Corrosion resistant ceramic and preparation method thereof |
| CN108117376B (en) * | 2017-12-29 | 2021-01-26 | 黑龙江省寒地建筑科学研究院 | Preparation method of sintered porous brick |
| CN109081677B (en) * | 2018-10-19 | 2020-04-24 | 景德镇陶瓷大学 | Antique brick body made of high-calcium-magnesium skarn type iron tailings and manufacturing method thereof |
| CN111018558A (en) * | 2019-11-12 | 2020-04-17 | 安徽省隆达建材科技有限公司 | Preparation method of small-aperture light foamed ceramic insulation board |
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Granted publication date: 20110504 Termination date: 20110731 |