CN104098280A - Low-grade magnesite light roasting technology - Google Patents
Low-grade magnesite light roasting technology Download PDFInfo
- Publication number
- CN104098280A CN104098280A CN201310126563.0A CN201310126563A CN104098280A CN 104098280 A CN104098280 A CN 104098280A CN 201310126563 A CN201310126563 A CN 201310126563A CN 104098280 A CN104098280 A CN 104098280A
- Authority
- CN
- China
- Prior art keywords
- concentrate
- low
- light
- magnesium
- grade magnesite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention relates to a light roasting technology of magnesite and especially relates to a low-grade magnesite light roasting technology. The technology includes following steps: (1) crushing and grinding low-grade magnesite until powder in -200 meshes accounts for 65-75%; performing a reverse-flotation desilication process and then performing a direct-flotation magnesium-extracting process to obtain magnesium concentrate ore pulp; (2) dehydrating the magnesium concentrate ore pulp to obtain concentrate filter cake; (3) drying the concentrate filter cake; (4) grinding the dried concentrate to obtain concentrate powder with particle size being not more than 0.5mm; and (5) calcining the grinded concentrate powder in a calcinator to obtain light-roasted magnesium. The technology is advantaged in that a problem that a gas-phase suspension calcinator, a fluidized flash calcinator and a cyclic calcinator, which are high-efficiently and energy-saving, are not available due to adhesion of agents in concentration of magnesite is completely solved, thereby enabling industrial production to be carried out successfully.
Description
Technical field
The present invention relates to the light-burned technique of a kind of magnesite, relate in particular to the light-burned technique of a kind of low-grade magnesite.
Background technology
The magnesite that the '30s starts to develop from last century is produced the electrosmelted magnesite clinker that magnesite clinker was further developed to the 1970s and 1980s in last century, is all directly to use raw ore direct production.The grade of the powder that the chemical composition of raw ore has determined to produce, sand, goods.Development due to high-temperature technology, grade to magnesia raw material, particularly chemical purity has proposed more and more higher requirement, in order to meet these requirements, Mining procedure has been proposed to the requirement of higher finished ore, for producing high-quality electrosmelted magnesite clinker and magnesite clinker, adopt method for floating to process magnesite, through flotation, more low-grade magnesite raw ore can be purified, to meet, produce the requirement of high-quality refractory materials to raw material.Generally adopt floatation process anyway to process low-grade magnesite, reverse flotation carries out desiliconization, and direct flotation is carried magnesium.
Development and requirement along with magnesite refractory production kind, the consumption of the low-grade magnesia of original direct employing giobertite production reheating is fewer and feweri, middle-grade sand, high purity sand be occuping market, and this just makes the production of magnesia can not directly use the former stone of magnesite again, must use light-burned MgO powder.Traditional light-burned MgO powder is produced and is all adopted " reverberatory furnace ", but reverberatory furnace is produced, light-burned MgO powder exists that energy consumption is high, roasting quality is poor, seriously polluted exceeding standard and many drawbacks such as ore utilization ratio is low.Under the requirement reducing discharging at national energy-saving, technique and equipment that reverberatory furnace is produced light-burned MgO powder will step down from the stage of history.The gas suspension calcination stove, fluidization flash roaster and the roasting Al of circulating roaster institute (OH) that are widely used at present alumina industry
3material properties and MgCO
3material properties comparatively approaching, and maturing temperature is also very close with the desired maturing temperature of light-burned MgO powder, have that hear rate is low, production environment is friendly, level of automation is high, single device production capacity is high and take up an area the series of advantages such as little, patent 201010124844.9 " a kind of light burning system for magnesite and light-burned method " just proposes to adopt above-mentioned type of furnace light-calcined magnesite.The process of low-grade magnesite direct flotation purification magnesium adopts saponified fat acids flotation reagent, and this medicament has certain viscosity, on the magnesium concentrate after choosing, has certain enrichment, causes and cannot carry out gas suspension calcination or fluosolids roasting.
Summary of the invention
The present invention is for addressing the above problem, the light-burned technique of a kind of low-grade magnesite and equipment are provided, the magnesium concentrate roasting in gas suspension calcination stove, fluidization flash roaster and circulating roaster smoothly that low-grade magnesite is obtained after flotation, produces qualified magnesia unslacked product.
The light-burned technique of a kind of low-grade magnesite of the present invention for achieving the above object, comprise the following steps: (1) is broken and grind by low-grade magnesite, grinds into-200 order 65-75%, first carries out Counterfloatating desiliconization, carry out again direct flotation purification magnesium, obtain magnesium concentrate pulp; (2) magnesium concentrate pulp dewaters, and obtains concentrate filter cake; (3) concentrate filter cake is dried; (4) dry concentrate grinds, the fine ore of wear into≤0.5mm; (5) fine ore after mill is sent into stoving oven roasting, obtain magnesia unslacked.
Described fragmentation adopts a kind of of jaw crusher or cone crusher.
Described grinding adopts the combination of ball mill and grading machine to grind.
Described flotation adopts a kind of in flotation cell or flotation column.
Described magnesium essence mine dehydration adopts a kind of in subsider, horizontal belt filter, vertical-disk filter, horizontal table filter, revolving-leaf type filter or plate-and-frame filter press.
Described concentrate filter cake making beating adopts strong stirring tank.
The spraying of described concentrate filter cake slurry is dry adopts a kind of in pressure spray dryer or centrifugal spray dryer.
Described fine ore stoving oven adopts a kind of in gas suspension calcination stove, fluidization flash roaster or circulating roaster.
Advantageous effect of the present invention: the present invention has thoroughly solved magnesite concentrate selection because medicament adheres to the cause problem that can not use energy-efficient gas suspension calcination stove, fluidization flash roaster and circulating roaster, can carry out industrial production smoothly.
Accompanying drawing explanation
Fig. 1 is schema of the present invention.
Embodiment
embodiment 1
Adopt jaw crusher to carry out fragmentation low-grade magnesite, adopt ball mill and grading machine combination to grind to-200 orders 70%, adopt flotation cell first to carry out Counterfloatating desiliconization, then carry out direct flotation purification magnesium, obtain magnesium concentrate pulp; Magnesium concentrate pulp adopts subsider to dewater, and obtains concentrate filter cake; Concentrate filter cake adopts tray drier to dry; Dry concentrate adopts dry ball to grind, the fine ore of wear into≤0.5mm; Fine ore after mill is sent into the roasting of gas suspension calcination stove, obtain magnesia unslacked.
embodiment 2
Adopt cone crusher to carry out fragmentation low-grade magnesite, adopt ball mill and grading machine combination to grind to-200 orders 70%, adopt flotation column first to carry out Counterfloatating desiliconization, then carry out direct flotation purification magnesium, obtain magnesium concentrate pulp; Magnesium concentrate pulp adopts horizontal belt filter to dewater, and obtains concentrate filter cake; Concentrate filter cake adopts compartment dryer to dry; Dry concentrate adopts Raymond mill to grind, the fine ore of wear into≤0.5mm; Fine ore after mill is sent into the roasting of gas suspension calcination stove, obtain magnesia unslacked.
embodiment 3
Adopt jaw crusher to carry out fragmentation low-grade magnesite, adopt ball mill and grading machine combination to grind to-200 orders 68%, adopt in flotation cell and first carry out Counterfloatating desiliconization, then carry out direct flotation purification magnesium, obtain magnesium concentrate pulp; Magnesium concentrate pulp adopts vertical-disk filter to dewater, and obtains concentrate filter cake; Concentrate filter cake adopts helicoid screw dryer to dry; Dry concentrate adopts that air swept mill grinds, the fine ore of wear into≤0.5mm; Fine ore after mill is sent into fluidized roaster roasting, obtain magnesia unslacked.
embodiment 4
Adopt jaw crusher to carry out fragmentation low-grade magnesite, adopt ball mill and grading machine combination to grind to-200 orders 65%, adopt flotation cell first to carry out Counterfloatating desiliconization, then carry out direct flotation purification magnesium, obtain magnesium concentrate pulp; Magnesium concentrate pulp adopts horizontal table filter to dewater, and obtains concentrate filter cake; Concentrate filter cake adopts tray drier to dry; Dry concentrate adopts Vertical Mill to grind, the fine ore of wear into≤0.5mm; Fine ore after mill is sent into circulating roaster roasting, obtain magnesia unslacked.
embodiment 5
Adopt jaw crusher to carry out fragmentation low-grade magnesite, adopt ball mill and grading machine combination to grind to-200 orders 72%, adopt flotation cell first to carry out Counterfloatating desiliconization, then carry out direct flotation purification magnesium, obtain magnesium concentrate pulp; Magnesium concentrate pulp adopts revolving-leaf type filter to dewater, and obtains concentrate filter cake; Concentrate filter cake adopts helicoid screw dryer to dry; Dry concentrate adopts that air swept mill grinds, the fine ore of wear into≤0.5mm; Fine ore after mill is sent into the roasting of gas suspension calcination stove, obtain magnesia unslacked.
embodiment 6
Adopt jaw crusher to carry out fragmentation low-grade magnesite, adopt ball mill and grading machine combination to grind to-200 orders 75%, adopt flotation cell first to carry out Counterfloatating desiliconization, then carry out direct flotation purification magnesium, obtain magnesium concentrate pulp; Magnesium concentrate pulp adopts plate-and-frame filter press to dewater, and obtains concentrate filter cake; Concentrate filter cake adopts helicoid screw dryer to dry; Dry concentrate adopts that air swept mill grinds, the fine ore of wear into≤0.5mm; Fine ore after mill is sent into the roasting of gas suspension calcination stove, obtain magnesia unslacked.
Claims (8)
1. the light-burned technique of low-grade magnesite, comprises the following steps:
(1) low-grade magnesite is broken and grind, grind into-200 order 65-75%, first carry out Counterfloatating desiliconization, then carry out direct flotation purification magnesium, obtain magnesium concentrate pulp;
(2) magnesium concentrate pulp dewaters, and obtains concentrate filter cake;
(3) concentrate filter cake is dried;
(4) dry concentrate grinds, the fine ore of wear into≤0.5mm;
(5) fine ore after mill is sent into stoving oven roasting, obtain magnesia unslacked.
2. the light-burned technique of a kind of low-grade magnesite according to claim 1, is characterized in that described fragmentation adopts a kind of of jaw crusher or cone crusher.
3. the light-burned technique of a kind of low-grade magnesite according to claim 1, is characterized in that described grinding adopts the combination of ball mill and grading machine to grind.
4. the light-burned technique of a kind of low-grade magnesite according to claim 1, is characterized in that described flotation adopts a kind of in flotation cell or flotation column.
5. the light-burned technique of a kind of low-grade magnesite according to claim 1, is characterized in that described magnesium essence mine dehydration adopts a kind of in subsider, horizontal belt filter, vertical-disk filter, horizontal table filter, revolving-leaf type filter or plate-and-frame filter press.
6. the light-burned technique of a kind of low-grade magnesite according to claim 1, is characterized in that described concentrate filter cake making beating adopts strong stirring tank.
7. the light-burned technique of a kind of low-grade magnesite according to claim 1, is characterized in that described concentrate filter cake slurry spraying is dry to adopt a kind of in pressure spray dryer or centrifugal spray dryer.
8. the light-burned technique of a kind of low-grade magnesite according to claim 1, is characterized in that described fine ore stoving oven adopts a kind of in gas suspension calcination stove, fluidization flash roaster or circulating roaster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310126563.0A CN104098280A (en) | 2013-04-12 | 2013-04-12 | Low-grade magnesite light roasting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310126563.0A CN104098280A (en) | 2013-04-12 | 2013-04-12 | Low-grade magnesite light roasting technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104098280A true CN104098280A (en) | 2014-10-15 |
Family
ID=51666869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310126563.0A Pending CN104098280A (en) | 2013-04-12 | 2013-04-12 | Low-grade magnesite light roasting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104098280A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109206024A (en) * | 2018-11-30 | 2019-01-15 | 嘉晨集团有限公司 | A kind of preparation method producing highly-purity magnesite using low-grade magnesite as raw material |
| CN112250323A (en) * | 2020-10-14 | 2021-01-22 | 沈阳化工大学 | Method for preparing sintered magnesia from powdery magnesite by one-step method |
| CN113772970A (en) * | 2021-09-01 | 2021-12-10 | 鞍钢集团北京研究院有限公司 | Method for preparing magnesium oxide by using magnesite |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994011304A1 (en) * | 1992-11-12 | 1994-05-26 | Deloro Magnesite Venture Fund | Process for removing metal impurities from calcined magnesite |
| CN1792940A (en) * | 2005-11-18 | 2006-06-28 | 东北大学 | Process for prepering active magnesium oxide |
| CN1994580A (en) * | 2006-12-27 | 2007-07-11 | 沈阳铝镁设计研究院 | Silicon removing process for dressing low-grade magnesite |
| CN102190449A (en) * | 2010-03-16 | 2011-09-21 | 沈阳铝镁设计研究院有限公司 | Light burning system and method of magnesite |
| CN102515213A (en) * | 2011-12-19 | 2012-06-27 | 北京科技大学 | Integrated utilization method of low grade magnesite |
-
2013
- 2013-04-12 CN CN201310126563.0A patent/CN104098280A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994011304A1 (en) * | 1992-11-12 | 1994-05-26 | Deloro Magnesite Venture Fund | Process for removing metal impurities from calcined magnesite |
| CN1792940A (en) * | 2005-11-18 | 2006-06-28 | 东北大学 | Process for prepering active magnesium oxide |
| CN1994580A (en) * | 2006-12-27 | 2007-07-11 | 沈阳铝镁设计研究院 | Silicon removing process for dressing low-grade magnesite |
| CN102190449A (en) * | 2010-03-16 | 2011-09-21 | 沈阳铝镁设计研究院有限公司 | Light burning system and method of magnesite |
| CN102515213A (en) * | 2011-12-19 | 2012-06-27 | 北京科技大学 | Integrated utilization method of low grade magnesite |
Non-Patent Citations (1)
| Title |
|---|
| 石建军等: "中国菱镁矿选矿现状分析", 《轻金属》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109206024A (en) * | 2018-11-30 | 2019-01-15 | 嘉晨集团有限公司 | A kind of preparation method producing highly-purity magnesite using low-grade magnesite as raw material |
| CN112250323A (en) * | 2020-10-14 | 2021-01-22 | 沈阳化工大学 | Method for preparing sintered magnesia from powdery magnesite by one-step method |
| CN113772970A (en) * | 2021-09-01 | 2021-12-10 | 鞍钢集团北京研究院有限公司 | Method for preparing magnesium oxide by using magnesite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106587116B (en) | A kind of method for extracting lithium carbonate and aluminium hydroxide using lepidolite and flyash | |
| CN107324670B (en) | Device for producing high-activity magnesium oxide by utilizing magnesite tailings | |
| CN103332718B (en) | A kind of preparation method of ultra-fine, low sodium Alpha-alumina micro mist | |
| CN102976644B (en) | Moderate-heat silicate cement clinker and production method thereof | |
| CN109279615B (en) | A kind of preparation method of the high whiteness calcination of talc of low cost | |
| CN102351441A (en) | Method for producing dead-burned magnesia through one-step calcination of magnesite tailings | |
| CN106186737B (en) | A kind of method of the environmental-friendly light-burned good quality magnesium oxide of magnesite concentrate | |
| CN103232253B (en) | Method for producing homogenous refractory raw material by utilizing medium or low grade bauxite ore | |
| CN109437607A (en) | A kind of preparation method of high-density sintered magnesia | |
| CN103351013A (en) | Method for producing aluminum oxide by sintering process | |
| CN106186740B (en) | A method of utilizing one one-step baking highly-purity magnesite of magnesite concentrate | |
| CN103951448A (en) | Micro-expansive brick for carbon anode baking furnace and preparation method thereof | |
| CN104098280A (en) | Low-grade magnesite light roasting technology | |
| CN104072161B (en) | After a kind of magnesite choosing, mine tailing prepares the method for calcium magnesia sand | |
| CN102976640B (en) | Method for preparing high-quality calcium magnesia by superhigh-temperature calcination | |
| CN109182760A (en) | The method of calcification tailings in vanadium extraction recycling vanadium extraction | |
| CN104098279A (en) | Low-grade magnesite light burning technology | |
| CN1323757A (en) | Superfine burnt kaolin production process | |
| CN101746791A (en) | Dry sintering method for aluminum oxide clinker | |
| CN101913892B (en) | Method for producing homogenized alumina | |
| KR101256807B1 (en) | the limestone forming materials using waste lime powder and a method of therof | |
| CN113800544B (en) | Method and system for preparing high Bai Gaochun aluminum hydroxide by utilizing solid waste | |
| CN107793132A (en) | Ceramic Tiles based on ceramic polished slag and preparation method thereof | |
| CN108455970A (en) | A kind of technique using the double-deck sintering spray gun shaft furnace production highly-purity magnesite | |
| CN104003691A (en) | Method for producing sintered bricks through high-water-content aluminum oxide mill tailings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141015 |