CN100368334C - Production process of sintered brick with iron tail ore as material - Google Patents
Production process of sintered brick with iron tail ore as material Download PDFInfo
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- CN100368334C CN100368334C CNB2005100271593A CN200510027159A CN100368334C CN 100368334 C CN100368334 C CN 100368334C CN B2005100271593 A CNB2005100271593 A CN B2005100271593A CN 200510027159 A CN200510027159 A CN 200510027159A CN 100368334 C CN100368334 C CN 100368334C
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- iron 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 present invention relates to sintered brick production, and is especially production process of sintered brick with iron tail ore as material and capable of eliminating environmental pollution caused by iron tail ore. The production process includes the following steps: dewatering iron tail ore as material to water content of 10-20 wt%, stoving, stirring, ageing, extruding to form adobe; drying adobe at 80-100 deg.c to water content below 2 wt%, roasting in oxidizing atmosphere at 950-1100 deg.c, preferably 1000-1050 deg.c. The production process is especially suitable for producing sintered brick with iron tail ore as material.
Description
Technical field: the production method that the present invention relates to a kind of vitrified brick, being particularly related to a kind of is the method for raw material production vitrified brick with the iron tailings, the present invention has solved the problem of complex utilization of metallurgy industry mine iron tailings for building material industry provides a large amount of vitrified brick raw materials.
Background technology: for a long time, it is the raw material production vitrified brick that China's building material industry adopts clay, brick sintering plant all is built up in wide rural area the earth, thereby cause the sector mass-type foundation weakness, equipment is backward, tempo is slow, production efficiency is low, not only occupied a large amount of soils, damaged a large amount of farmlands, the technical progress of the sector has also been brought very big influence.The general mineral composition of unselected clay vitrified brick is: Fe
2O
32～9%, CaO0.5～8%, MgO0.4～2%, SiO
240～70%, Al
2O
316～40%, TiO
20.5 SO～3%,
20.1～2.5%, loss on ignition 1.5～3.3%.In order to economize the land resource, improve the ecological environment, improve the national economy operating mass, building materials department of country deepens constantly the materials for wall reform, regulation forbids producing, using and selling solid clay brick from June 30th, 2003, and advocates and use industrial waste development building material.In recent years; along with the raising of country to environment protection, soil utilization requirement, the raw material of some instead of clay appears in succession, as: with industrial wastes such as coal gangue, flyash is the raw material production vitrified brick; with shale is raw material production vitrified brick etc., and the performance of its product all is better than clay brick.The general mineral composition of coal ash sintering brick is: Fe
2O
32～10%, CaO0～15%, MgO0～5%, SiO
255～65%, Al
2O
310～20%, TiO
20.5 SO～3%,
30～3%, loss on ignition 3～15%.
Mine tailing is the solid waste in the production process of mine, and the mine tailing in most of mines is stored up in the mine tailing storehouse does not obtain development and use, and they have taken a large amount of land resources, and ecotope has also been caused certain influence, have become big public hazards.Mine tailing can be divided into metal tailings and nonmetal mine tailing, and metal tailings can be divided into many types again, as: iron tailings, copper mine tailing etc.Iron and steel can not change in considerable time from now on as the base mateiral of national economy and social development.With regard to iron tailings, it is the solid waste that iron mine beneficiation is produced, and China is the big country of steel production and consumption, the annual a large amount of iron ore of consumption that needs, therefore the iron tailings amount of discharging is also quite big, not only economic benefit is huge to fully utilize these iron tailings, and can eliminate environmental pollution.Because the iron tailings moiety is more, sintering temperature is difficult to control, is the relevant criterion that the vitrified brick quality product of raw material production is difficult to reach vitrified brick with the iron tailings.At present, the utilization of China's iron tailings still rests on the level of producing non-burning brick and concrete segment such as lawn brick, paving tile.
Summary of the invention: the object of the present invention is to provide a kind of is the method for raw material production vitrified brick with the iron tailings, and solving is raw material production vitrified brick quality product technical problem not up to standard with the iron tailings at present.Technical scheme of the present invention is: with the iron tailings is the method for raw material production vitrified brick, may further comprise the steps: raw material dehydration, oven dry, stirring, ageing, be squeezed into base, brick bat drying, roasting, cooling and obtain finished product.Raw material is the particulate iron tailings, water content after the raw material dehydration is 10～20%, the temperature of brick bat drying is 80～100 ℃, dry back adobe water content is controlled at below 2%, roasting is carried out under oxidizing atmosphere, maturing temperature is 950～1100 ℃, and preferred 1000～1050 ℃, soaking time is 4～6 hours, in the roasting temperature-rise period 500～600 ℃, heating-up time was controlled at 4～5 hours, and during this period, sulfurous iron ore and spathic iron ore are decomposed to form exothermic peak, produce the loss of 6～8% thermogravimetrics, 750～890 ℃, the heating-up time was controlled at 160～180 minutes, and rhombspar and calcite produce endothermic reaction during this period.
The invention has the beneficial effects as follows: 1. China is the big country of iron ore production and consumption, the iron tailings amount of annual discharging is huge in the production process of mine, these mine tailings are all stored up in the mine tailing storehouse and have been taken a large amount of mountain regions, reservoir, farmland, village, farmland to the downstream have constituted huge threat, in the past for many years in produced a lot of geologic hazards, discharge of wastewater in the mine tailing storehouse has caused very big harm to river, soil, has destroyed geographic ecotope.Fully utilize these iron tailings and help protecting national resources, help protecting ecology and physical environment, help improving mine technology level and economic benefit.2. adopt iron tailings to produce vitrified brick, also provide thinking for other metal, nonmetal comprehensive utilization of tailing not only for the iron tailings comprehensive utilization provides approach.3. iron tailings is used for producing vitrified brick and provides sufficient resources for building material industry vitrified brick raw material, and the technical progress that promotes building material industry brick and tile industry is had crucial meaning.Adopt the iron tailings instead of clay produce vitrified brick to protect farmland, the conservation of nature environment has important effect equally.
Embodiment: embodiment 1, raw material select the iron tailings of meishan iron mine for use, mineral composition, material properties and the size-grade distribution of chemical examination and analysis iron tailings.The mineral composition of plum mountain iron tailings is as follows: Fe
2O
313～18%, CaO7～14%, MgO1.5～4%, SiO
220～40%, Al
2O
33～12%, SO
20.1～2.5%, loss on ignition 10～20%.The present invention does not have special requirement for the raw material of iron tailings, adopts filtering equipment that the iron tailings ore pulp is dewatered, and makes tailings concentration bring up to 80% by 25%; After the processes such as drying, stirring, ageing, be adobes such as solid brick for building, perforated brick, hollow brick with the raw material extrusion molding; After processes such as brick bat drying, roasting, cooling, produce the finished bricks for building of meeting the need of market.
When the brick bat drying bake out temperature reached 90 ℃, the adobe water ratio was reduced to and enters the roasting stage below 2%; To sintering kiln without limits, to combustion system also without limits, when maturing temperature reached 500～600 ℃, sulfurous iron ore and spathic iron ore were decomposed to form exothermic peak under oxidizing atmosphere, produce the loss of 6～8% thermogravimetrics, be controlled at 4 hours in this temperature range heating-up time; When maturing temperature reached 750～830 ℃, rhombspar and calcite produced endothermic reaction and require heat-up rate to slow down, and this temperature range heating-up time is 160 minutes; When maturing temperature reached 960 ℃ of insulations after 6 hours, be cooled to normal temperature gradually and can produce qualified vitrified brick goods.Remove the technology of above detailed description, other brickmaking technologies all adopt common process.
Quality product is carried out GB/T5101-1998 " ordinary fired brick ", GB13544 " sintered perforated brick ", GB13545-2003 " hollow brick and holllow building block ", carries out GB6566-2001 " the radioactive material nucleic is limited the quantity of " simultaneously.Sintered article is carried out detections such as ultimate compression strength, folding strength, endurance quality according to above standard-required; The ultimate compression strength detected result: solid brick is 13.3MPa, and perforated brick is 13.0MPa; The endurance quality detected result: water-intake rate is 21.8%, and the solid brick rate of weight loss is 0.55%, and the perforated brick rate of weight loss is 0.98%; Radioassay result is: the internal radiation index is 0.4, and standard is≤1.0, and the external radiation exposure index is 0.5, and standard is≤1.3, and detected result all meets above-mentioned standard.
Embodiment 2, and tailings concentration brings up to 85% by 30%, and when the brick bat drying bake out temperature reached 95 ℃, the adobe water ratio was reduced to and enters the roasting stage below 2%; Time between the roasting heating zone 500～600 ℃ the time was controlled at 4.5 hours, and the time between the roasting heating zone 750～830 ℃ the time was controlled at 170 minutes, when maturing temperature reaches 1030 ℃, was incubated 5 hours, and all the other are identical with embodiment 1.
Embodiment 3, and tailings concentration brings up to 90% by 45%, and when the brick bat drying bake out temperature reached 100 ℃, the adobe water ratio was reduced to and enters the roasting stage below 2%; Time between the roasting heating zone 500～600 ℃ the time was controlled at 5 hours, and the time between the roasting heating zone 750～830 ℃ the time was controlled at 180 minutes, when maturing temperature reaches 1050 ℃, was incubated 4 hours, and all the other are identical with embodiment 1.
Claims (3)
1. with the iron tailings method of raw material production vitrified brick, may further comprise the steps: raw material dehydration, oven dry, stirring, ageing, be squeezed into base, brick bat drying, roasting, cooling and obtain finished product, it is characterized in that: raw material is the particulate iron tailings, water content after the raw material dehydration is 10～20%, the temperature of brick bat drying is 80～100 ℃, and dry back adobe water content is controlled at below 2%, and roasting is carried out under oxidizing atmosphere, maturing temperature is 950～1100 ℃, and soaking time is 4～6 hours.
2. according to claim 1 is the method for raw material production vitrified brick with the iron tailings, it is characterized in that: maturing temperature is 1000～1050 ℃.
3. according to claim 1 is the method for raw material production vitrified brick with the iron tailings, it is characterized in that: in the roasting temperature-rise period 500～600 ℃, the heating-up time was controlled at 4～5 hours, and 750～890 ℃, the heating-up time was controlled at 160～180 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100271593A CN100368334C (en) | 2005-06-27 | 2005-06-27 | Production process of sintered brick with iron tail ore as material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100271593A CN100368334C (en) | 2005-06-27 | 2005-06-27 | Production process of sintered brick with iron tail ore as material |
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|---|---|
| CN1887770A CN1887770A (en) | 2007-01-03 |
| CN100368334C true CN100368334C (en) | 2008-02-13 |
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| CNB2005100271593A Expired - Fee Related CN100368334C (en) | 2005-06-27 | 2005-06-27 | Production process of sintered brick with iron tail ore as material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713233B (en) * | 2009-10-30 | 2011-06-29 | 武汉理工大学 | Preparation method of porous brick |
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| CN100422116C (en) * | 2007-05-31 | 2008-10-01 | 郑州祥通耐火陶瓷有限公司 | Casting material for carbon gyration calcining kiln confected by gold tailings |
| CN100422117C (en) * | 2007-05-31 | 2008-10-01 | 郑州祥通耐火陶瓷有限公司 | Gas permeable brick for producing carbon baking furnace flame path wall by gold tailings and iron tailings |
| CN101602614B (en) * | 2009-06-30 | 2012-02-01 | 西安建筑科技大学 | Light heat-insulation wall material and preparation method |
| CN102642241A (en) * | 2012-05-07 | 2012-08-22 | 王梅农 | Comprehensive treatment of soil containing much waste |
| CN103819173B (en) * | 2014-02-14 | 2015-08-05 | 浙江建设职业技术学院 | A kind of method utilizing iron ore waste residue produced sintering brick |
| CN104261714A (en) * | 2014-09-12 | 2015-01-07 | 中节能六合天融环保科技有限公司 | Method for preparing tailing ultrafine powder by compounding many kinds of metal tailings |
| CN104844156A (en) * | 2015-04-27 | 2015-08-19 | 英德市奥胜新材料有限责任公司 | Preparation method for fired brick |
| CN108166697A (en) * | 2018-01-08 | 2018-06-15 | 北京工业大学 | A kind of method that one step sintering of iron tailings prepares heat insulation decoration integrated plate |
| CN111087225B (en) * | 2019-03-14 | 2023-06-20 | 西安煤科动力科技有限公司 | Sintered brick and preparation method thereof |
| CN111606687A (en) * | 2020-05-20 | 2020-09-01 | 南京福翊铭环保新材料有限公司 | Tailing dewatering and mining method for sintered brick raw material |
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| CN1263064A (en) * | 1999-02-11 | 2000-08-16 | 东北大学钎具开发研究中心 | Production method of waste slag hollow brick for mining industry |
| CN1548398A (en) * | 2003-05-14 | 2004-11-24 | 王文会 | Production process of high-strength wall and floor tile |
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2005
- 2005-06-27 CN CNB2005100271593A patent/CN100368334C/en not_active Expired - Fee Related
Patent Citations (3)
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|---|---|---|---|---|
| US5465547A (en) * | 1992-04-30 | 1995-11-14 | Jakel; Karl W. | Lightweight cementitious roofing |
| CN1263064A (en) * | 1999-02-11 | 2000-08-16 | 东北大学钎具开发研究中心 | Production method of waste slag hollow brick for mining industry |
| CN1548398A (en) * | 2003-05-14 | 2004-11-24 | 王文会 | Production process of high-strength wall and floor tile |
Non-Patent Citations (1)
| Title |
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| 铁矿尾矿制砖烧成性能的研究. 田玉梅等.硅酸盐通报，第6期. 2004 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101713233B (en) * | 2009-10-30 | 2011-06-29 | 武汉理工大学 | Preparation method of porous brick |
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| CN1887770A (en) | 2007-01-03 |
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Granted publication date: 20080213 Termination date: 20160627 |