CN105603179A - Process for granulating, shaping and sintering phosphate powder - Google Patents
Process for granulating, shaping and sintering phosphate powder Download PDFInfo
- Publication number
- CN105603179A CN105603179A CN201610025533.4A CN201610025533A CN105603179A CN 105603179 A CN105603179 A CN 105603179A CN 201610025533 A CN201610025533 A CN 201610025533A CN 105603179 A CN105603179 A CN 105603179A
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- China
- Prior art keywords
- phosphate powder
- phosphate
- phosphate rock
- ground phosphate
- pelletizing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a process for granulating, shaping and sintering phosphate powder. The process includes carrying out crushing, sieving, drying and homogenizing pre-treatment on phosphate to obtain the phosphate powder; feeding the phosphate powder into a ball mill and grinding the phosphate powder until the grain sizes of the phosphate powder are smaller than or equal to 1 mm; adhering the phosphate powder by the aid of adhesive; coating a layer of fuel on the surface of the obtain phosphate powder; feeding the phosphate powder into a chain grate type roasting machine and roasting the phosphate powder; feeding the phosphate powder into a chain grate type cooling machine and cooling, crushing and sieving the phosphate powder to obtain phosphate pellets with the grain sizes of 10-20 mm. Compared with the prior art, the process has the advantages that shortcomings in the prior art can be overcome by the aid of the process, methods of the process are simple, and the process is convenient to implement; the phosphate powder is finely ground and activated, and accordingly the reaction temperature of the phosphate powder can be lowered; tail gas of phosphorus furnaces is utilized, the phosphate pellets are produced by the aid of the unique roasting and air cooling process, accordingly, solid fuel consumption can be reduced, and phosphate resources can be efficiently and comprehensively utilized.
Description
Technical field
The present invention relates to cast steel processing technique field, specifically a kind of ground phosphate rock granulating and forming burnsKnot technique.
Background technology
Furnace charge refers to ore and other catalysis materials of adding smelting furnace, iron ore, steel billet, lifeIron, scrap iron and steel, breeze, coking coal, ferroalloy all belong to furnace charge. Ground phosphate rock is the one of furnace charge,China's phosphate rock resource is very abundant, but most be all difficult to directly be utilized in, low-grade heightThe calcareous phosphorite of magnesium weathering type, in ore, phosphorus ore composition granule is thin, and embedding cloth is tight, must be through flotationEnrichment, sintering are made high-grade phosphorus ore agglomerate. Current ground phosphate rock sintering process, exists solidFluid fuel consumes high, the problem that sinter strength is poor, yield poorly, and in ground phosphate rock fine grinding operation,Ground phosphate rock grindability is very poor, and fine grained is the group of connecing easily, needs to consume a large amount of energy in grinding processAnd the production time; And in sintering circuit, after bed of material surface ignition, along with entering of sinteringJourney, the heat that in compound, solid fuel ignition produces shifts to bottom from bed of material top, the bed of materialTemperature presents from top to bottom the trend progressively improving, fuel concentrated combustion and sintering ore bed fromMoving accumulation of heat effect, more down temperature is higher, heat is more, high temperate zone is wider to make the bed of material, because ofThis sintering process is an anisothermal process, and maximum temperature migration velocity in sinter bed andThe thickness of combustion zone has a great impact the quality of sintering process and product quality, such as the bed of materialAfter thickening, solid fuel consumption reduces relatively, and the sintering top bed of material causes because of shortage of heatSinter strength variation, decrease in yield, finished product sintering deposit heterogeneity, production system back powder rateIncrease, worsen sintering process conditions etc.
Summary of the invention
The present invention aims to provide a kind of ground phosphate rock granulating and forming sintering process, has overcome prior artDeficiency, process is simple, easy to operate, by fine grinding ground phosphate rock and activating phosphorite powder,Reduce its reaction temperature, in sintering circuit, adopt soaking method, improve sinter strength and burningKnot mineral products amount, saves solid fuel consumption.
The invention provides following technical scheme:
A kind of ground phosphate rock granulating and forming sintering process, comprises the following steps:
(1) by phosphorus ore after fragmentation, screening, oven dry and homogenizing pretreatment, make moisture and containAmount is the ground phosphate rock of 8%-10%, granularity≤10mm, then ground phosphate rock is sent into ball mill, levigateTo granularity be≤1mm, then get ground phosphate rock, add solid weight 3-5% aqueous high molecular,The flyash of the furfural dregs of 10-20%, the gallic acid of 0.3-0.5%, 10-20%, mixesEvenly, then carry out fine grinding to 0.05-0.07mm, specific area 1300-1400cm2/g；
(2) prepare spherolite: get the compound of step (1) fine grinding, add described compound weightThe bentonite bonding agent of amount 1.3-1.5%, the fuel of 5.0-5.5%, evenly mix, and adds waterWetting, ground phosphate rock is bondd mutually, control pelletizing moisture 8.0-8.5%, then pass through pelletizingMachine pelletizing, spherolite granularity is controlled at 10-20mm;
(3) sintering: the pellet surface of step (2) gained is wrapped to one deck fuel, pack chain intoComb formula burning machine, passes into phosphorus furnace exhaust gas, and at 850-950 DEG C of roasting temperature, the time is 20-30Minute, then enter cooling, the broken and screening of chain grate cooler, cool finally by airTo below 100 DEG C, making granularity is the phosphorus ore pelletizing of 10-20mm.
In pelletizer pelletizing process described in described step (2), the pelletizing time is8-15min, shatter strength of green pellet is greater than 4 times/0.5m, and compression strength is greater than 12N/, quick-friedSplit temperature higher than 280 DEG C.
Fuel described in described step (3) is one or both in coke powder, anthracite.
Compared with the prior art, beneficial effect of the present invention: the present invention has overcome prior artDeficiency, process is simple, easy to operate, by fine grinding ground phosphate rock and activating phosphorite powder,Reduce its reaction temperature, utilize phosphorus furnace exhaust gas, adopt unique roasting and air process for cooling,Produce phosphorus ore pelletizing, not only save solid fuel consumption, and realized phosphate rock resourceHigh-efficiency comprehensive utilization.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearlyChu, intactly description, obviously, described embodiment is only the present invention's part embodiment,Instead of whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the artNot making the every other embodiment obtaining under creative work prerequisite, all belong to thisThe scope of bright protection.
A kind of ground phosphate rock granulating and forming sintering process, comprises the following steps:
(1) by phosphorus ore after fragmentation, screening, oven dry and homogenizing pretreatment, make moisture and containAmount is the ground phosphate rock of 8%-10%, granularity≤10mm, then ground phosphate rock is sent into ball mill, levigateTo granularity be≤1mm, then get ground phosphate rock, add solid weight 3-5% aqueous high molecular,The flyash of the furfural dregs of 10-20%, the gallic acid of 0.3-0.5%, 10-20%, mixesEvenly, then carry out fine grinding to 0.05-0.07mm, specific area 1300-1400cm2/g；
(2) prepare spherolite: get the compound of step (1) fine grinding, add described compound weightThe bentonite bonding agent of amount 1.3-1.5%, the fuel of 5.0-5.5%, evenly mix, and adds waterWetting, ground phosphate rock is bondd mutually, control pelletizing moisture 8.0-8.5%, then pass through pelletizingMachine pelletizing, spherolite granularity is controlled at 10-20mm;
(3) sintering: the pellet surface of step (2) gained is wrapped to one deck fuel, pack chain intoComb formula burning machine, passes into phosphorus furnace exhaust gas, and at 850-950 DEG C of roasting temperature, the time is 20-30Minute, then enter cooling, the broken and screening of chain grate cooler, cool finally by airTo below 100 DEG C, making granularity is the phosphorus ore pelletizing of 10-20mm.
In pelletizer pelletizing process described in described step (2), the pelletizing time is8-15min, shatter strength of green pellet is greater than 4 times/0.5m, and compression strength is greater than 12N/, quick-friedSplit temperature higher than 280 DEG C.
Fuel described in described step (3) is one or both in coke powder, anthracite.
To those skilled in the art, obviously the invention is not restricted to described example embodimentDetails, and in the situation that not deviating from spirit of the present invention or essential characteristic, can be with itHis concrete form is realized the present invention. Therefore, no matter from which point, all should be by embodimentRegard exemplary as, and be nonrestrictive, scope of the present invention is by claimsInstead of described explanation limits, be therefore intended to by drop on claim the implication that is equal to important document andAll changes in scope are included in the present invention. In addition, although should be appreciated that this descriptionDescribed according to embodiment, but be not that each embodiment only comprises an independently technologyScheme, this narrating mode of description is only for clarity sake, those skilled in the art shouldAs a whole when description is done, the technical scheme in each embodiment also can be through suitable groupClose, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. a ground phosphate rock granulating and forming sintering process, is characterized in that, comprises the following steps:
(1) by phosphorus ore after fragmentation, screening, oven dry and homogenizing pretreatment, make moisture and containAmount is the ground phosphate rock of 8%-10%, granularity≤10mm, then ground phosphate rock is sent into ball mill, levigateTo granularity be≤1mm, then get ground phosphate rock, add solid weight 3-5% aqueous high molecular,The flyash of the furfural dregs of 10-20%, the gallic acid of 0.3-0.5%, 10-20%, mixesEvenly, then carry out fine grinding to 0.05-0.07mm, specific area 1300-1400cm2/g；
(2) prepare spherolite: get the compound of step (1) fine grinding, add described compound weightThe bentonite bonding agent of amount 1.3-1.5%, the fuel of 5.0-5.5%, evenly mix, and adds waterWetting, ground phosphate rock is bondd mutually, control pelletizing moisture 8.0-8.5%, then pass through pelletizingMachine pelletizing, spherolite granularity is controlled at 10-20mm;
(3) sintering: the pellet surface of step (2) gained is wrapped to one deck fuel, pack chain intoComb formula burning machine, passes into phosphorus furnace exhaust gas, and at 850-950 DEG C of roasting temperature, the time is 20-30Minute, then enter cooling, the broken and screening of chain grate cooler, cool finally by airTo below 100 DEG C, making granularity is the phosphorus ore pelletizing of 10-20mm.
2. a kind of ground phosphate rock granulating and forming sintering process according to claim 1, itsBe characterised in that: in the pelletizer pelletizing process described in described step (2), the pelletizing time is8-15min, shatter strength of green pellet is greater than 4 times/0.5m, and compression strength is greater than 12N/, quick-friedSplit temperature higher than 280 DEG C.
3. a kind of ground phosphate rock granulating and forming sintering process according to claim 1, itsBe characterised in that: the fuel described in described step (3) is the one in coke powder, anthraciteOr two kinds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610025533.4A CN105603179A (en) | 2016-01-13 | 2016-01-13 | Process for granulating, shaping and sintering phosphate powder |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610025533.4A CN105603179A (en) | 2016-01-13 | 2016-01-13 | Process for granulating, shaping and sintering phosphate powder |
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| CN105603179A true CN105603179A (en) | 2016-05-25 |
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| CN201610025533.4A Pending CN105603179A (en) | 2016-01-13 | 2016-01-13 | Process for granulating, shaping and sintering phosphate powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114516773A (en) * | 2022-03-01 | 2022-05-20 | 郑州大学 | Method for granulating powdered rock phosphate |
| EP3986845A4 (en) * | 2020-08-24 | 2023-08-09 | ICL Europe Cooperatief U.A. | A granule of polyhalite and phosphate rock and a compaction process for the production thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104261363A (en) * | 2014-09-24 | 2015-01-07 | 云南天安化工有限公司 | Method for granulating, molding and calcining ground phosphorite |
| CN104630454A (en) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | Ground phosphorite sintering technique |
| CN104630452A (en) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | Sintering method for preparing boron ore powder |
-
2016
- 2016-01-13 CN CN201610025533.4A patent/CN105603179A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104261363A (en) * | 2014-09-24 | 2015-01-07 | 云南天安化工有限公司 | Method for granulating, molding and calcining ground phosphorite |
| CN104630454A (en) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | Ground phosphorite sintering technique |
| CN104630452A (en) * | 2015-02-06 | 2015-05-20 | 铜陵百荣新型材料铸件有限公司 | Sintering method for preparing boron ore powder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3986845A4 (en) * | 2020-08-24 | 2023-08-09 | ICL Europe Cooperatief U.A. | A granule of polyhalite and phosphate rock and a compaction process for the production thereof |
| US12049432B2 (en) | 2020-08-24 | 2024-07-30 | Icl Europe Cooperatief U.A. | Granule of polyhalite and phosphate rock and a compaction process for the production thereof |
| CN114516773A (en) * | 2022-03-01 | 2022-05-20 | 郑州大学 | Method for granulating powdered rock phosphate |
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Application publication date: 20160525 |