CN104630455A - Manganese mineral powder sintering process - Google Patents
Manganese mineral powder sintering process Download PDFInfo
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- CN104630455A CN104630455A CN201510064538.3A CN201510064538A CN104630455A CN 104630455 A CN104630455 A CN 104630455A CN 201510064538 A CN201510064538 A CN 201510064538A CN 104630455 A CN104630455 A CN 104630455A
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- sintering
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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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- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a manganese mineral powder sintering process which comprises the following steps: (1) finely grinding mineral powder: taking manganese mineral powder, adding 5-7wt% of aqueous macromolecules, 15-25% of furfural residues, 0.4-0.6% of gallic acid and 15-25% of coal ash, uniformly mixing and finely grinding; (2) preparing spherulite; and (3) sintering: coating a fuel on the surface of the spherulite, filling into a sintering machine, and distributing materials, wherein the material bed is 600-700mm high, an atomizing and spraying device used in the distributing step of the sintering machine adds water into the sintering mixture, a small water distribution amount is adopted for middle and upper distribution of the bed of the mixture of the sintering machine and the water content is 5-6% and a large water distribution amount is adopted for lower distribution of the bed of material and the water content is 7-8%; and drying, preheating, igniting and sintering to prepare hot sintering ores, and cooling, crushing and sieving the hot sintering ores to obtain finished product sintering ores. The manganese mineral powder sintering process disclosed by the invention is simple in process method. The reaction temperature is reduced by grinding the manganese mineral powder and activating the manganese mineral powder. In the sintering step, a soaking method is adopted, so that the sintering strength and the sintered ore output are improved, and the solid fuel consumption is saved.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, particularly relate to a kind of manganese mineral powder sintering process.
Background technology
Furnace charge refers to the ore and other catalytic materials that add smelting furnace, and iron ore, steel billet, the pig iron, iron and steel scrap, breeze, coking coal, iron alloy all belong to furnace charge.Manganese mineral powder is the one of furnace charge, and China's manganese resource is poor, and manganese ore grade is on the low side, and foreign matter content is high, and ore structures is complicated, the shortcomings such as disseminated grain size is thin, therefore must make higher-grade sintering block through floating and enriching, sintering.Manganese mineral powder agglomeration comprises pressure group, sintering and pelletizing three kinds of techniques, current manganese mineral powder sintering process, there is solid fuel consumption high, the problem that sinter strength is poor, yield poorly, in manganese mineral powder fine grinding operation, manganese mineral powder grindability is very poor, and fine particle is the group of connecing easily, needs to consume a large amount of energy and production time in grinding process, and in sintering circuit, after bed of material surface ignition, along with the process of sintering, the heat that in compound, solid fuel ignition produces shifts from bed of material top lower portion, material layer temperature presents the trend progressively improved from top to bottom, the auto accumulation heat effect of fuel concentrated combustion and sintering ore bed, more down temperature is higher to make the bed of material, heat is more, thermal zone wider, therefore sintering process is an anisothermal process, and the quality of thickness to sintering process and quality product of top temperature travelling speed in sinter bed and zone of combustion has a great impact, after such as the bed of material thickens, solid fuel consumption reduces relatively, the sintering top bed of material causes sinter strength to be deteriorated because of shortage of heat, decrease in yield, finished product agglomerate heterogeneity, production system sinter return rate increases, worsen sintering process conditions etc.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of manganese mineral powder sintering process is provided, processing method is simple, easy to operate, by fine grinding manganese mineral powder and refined manganese dioxide breeze, reduce its temperature of reaction, in sintering circuit, adopt soaking method, improve sinter strength and Sintering Yield, save solid fuel consumption.
The present invention adopts following technical scheme to achieve these goals:
A kind of manganese mineral powder sintering process, comprises the following steps:
(1) breeze fine grinding: get manganese mineral powder, add the aqueous high molecular of its weight 5-7%, the furfural dregs of 15-25%, the gallic acid of 0.4-0.6%, the flyash of 15-25%, mix, then carry out fine grinding, what fine grinding was less than 0.074mm to granularity is greater than 60%;
(2) spherolite is prepared: the compound getting step (1) fine grinding, add the solvent of the described caking agent of compound weight 1.5-3.0%, the fuel of 4.5-6.5% and 8.5-10.5%, Homogeneous phase mixing, add water-wet, control pelletizing moisture 8.0-8.5%, then by pelletizer pelletizing, spherolite Task-size Controlling is at 5-10mm;
(3) sinter: the pellet surface of step (2) gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 600-700mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 5-6%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 7-8%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains finished product agglomerate.
Furfural dregs described in step (1) take corn cob as the residue waste residue that raw material sulphuric acid method produces furfural.
Caking agent described in step (2) is made up of the component of following weight percent: manganate 10-50%, Sodium salts humic acids 5-40%, polyacrylamide 10-40%, starch 5-20%.
Fuel described in step (2) is one or both in coke powder, hard coal.
Solvent described in step (2) is the one in unslaked lime, Wingdale.
In pelletizer balling process described in step (2), Balling time is 10-15min, and shatter strength of green pellet is greater than 4 times/0.5m, and ultimate compression strength is greater than 10N/, and burst temperature is higher than 300 DEG C.
Described in step (3), drying temperature is 400-450 DEG C, and dry negative pressure is 5-6KPa, and time of drying is 5-8min, and described ignition temperature is 1100-1200 DEG C, and igniting negative pressure is 5-6KPa.
Compared with the prior art, beneficial effect of the present invention is as follows:
(1) manganese mineral powder sintering process of the present invention, processing method is simple, easy to operate, by fine grinding manganese mineral powder and refined manganese dioxide breeze, reduce its temperature of reaction, in sintering circuit, adopt soaking method, improve sinter strength and Sintering Yield, save solid fuel consumption.
(2) manganese mineral powder is first carried out fine grinding process by the present invention, with regard to manganese ore fine fraction content and specific surface area, improve its balling property, connect agent by interpolation again and improve green ball strength and thermostability, divided by pellet forming process and fuel and add technique, improve the ventilation property of the bed of material on sinter machine, improve the combustion conditions of fuel, the advantage of pelletizing process and sintering process is combined, sintering ore deposit is by solid phase consolidation and liquid phase is bonding combines, the consolidation in intensified-sintered ore deposit, therefore, sinter strength and output increase substantially, and energy consumption obviously reduces.
(3) the present invention adds the breeze additives such as aqueous high molecular, furfural dregs, gallic acid and flyash in the manganese mineral powder fine grinding stage, has significant grinding-aid effect, effectively excites breeze active, reduces its temperature of reaction.
(4) the present invention is in sintering circuit, by adopting uniform heating process, in stub bar, bottom, the uniform atomized water of surface sprinkling before roasting, improve the bulk density of compound in sinter bed, improve solid fuel and hot gas flow conduction efficiency, solve that material layer lower part auto accumulation heat temperature in deep bed sintering is too high, fuel and water dispenser ratio are difficult to uniform temperature in sintering top shortage of heat and the bed of material, make manganese mineral powder soaking, improve the seed output and quality of agglomerate, save solid fuel consumption.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but the present invention is not limited only to these embodiments, and under the prerequisite not departing from present inventive concept, any improvement done all drops within protection scope of the present invention.
Embodiment 1:
A kind of manganese mineral powder sintering process, comprises the following steps:
(1) breeze fine grinding: get manganese mineral powder, add the aqueous high molecular of its weight 5%, 15% furfural dregs, the gallic acid of 0.4%, the flyash of 25%, mix, then carry out fine grinding, what fine grinding was less than 0.074mm to granularity is greater than 60%;
(2) spherolite is prepared: the compound getting step (1) fine grinding, add the described caking agent of compound weight 1.5%, the coke powder of 4.5% and 8.5% unslaked lime, Homogeneous phase mixing, add water-wet, control pelletizing moisture 8.0-8.5%, then by pelletizer pelletizing, spherolite Task-size Controlling is at 5mm; Described caking agent is made up of the component of following weight percent: manganate 10%, Sodium salts humic acids 40%, polyacrylamide 40%, starch 10%; In described pelletizer balling process, Balling time is 10min, shatter strength of green pellet 5 times/0.5m, ultimate compression strength 15N/, burst temperature 500 DEG C.
(3) sinter: the pellet surface of step (2) gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 600mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 5%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 7%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains finished product agglomerate, described drying temperature is 4000 DEG C, and dry negative pressure is 5KPa, and time of drying is 5min, described ignition temperature is 1100 DEG C, and igniting negative pressure is 5KPa.
The sintering index of the present embodiment 1 is: agglomerate yield rate 88.5%, and sinter quality is 3.23t/m
2.h, barrate strength is 86.56%, and solid fuel consumption is 60.08kg/t.
Embodiment 2:
A kind of manganese mineral powder sintering process, comprises the following steps:
(1) breeze fine grinding: get manganese mineral powder, add the aqueous high molecular of its weight 6%, 20% furfural dregs, the gallic acid of 0.5%, the flyash of 20%, mix, then carry out fine grinding, what fine grinding was less than 0.074mm to granularity is greater than 60%; Described furfural dregs take corn cob as the residue waste residue that raw material sulphuric acid method produces furfural.
(2) spherolite is prepared: the compound getting step (1) fine grinding, add the described caking agent of compound weight 2.0%, the hard coal of 5.5% and 9.5% Wingdale, Homogeneous phase mixing, add water-wet, control pelletizing moisture 8.3%, then by pelletizer pelletizing, spherolite Task-size Controlling is at 10mm; Described caking agent is made up of the component of following weight percent: manganate 30%, Sodium salts humic acids 20%, polyacrylamide 30%, starch 20%.In described pelletizer balling process, Balling time is 13min, shatter strength of green pellet 6 times/0.5m, ultimate compression strength 16N/, burst temperature 600 DEG C.
(3) sinter: the pellet surface of step (2) gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 650mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 6%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 8%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains finished product agglomerate.Described drying temperature is 430 DEG C, and dry negative pressure is 6KPa, and time of drying is 6min, and described ignition temperature is 1150 DEG C, and igniting negative pressure is 6KPa.
The sintering index of the present embodiment 2 is: agglomerate yield rate 90.02%, and sinter quality is 3.92t/m
2.h, barrate strength is 89.68%, and solid fuel consumption is 60.03kg/t.
Embodiment 3:
A kind of manganese mineral powder sintering process, comprises the following steps:
(1) breeze fine grinding: get manganese mineral powder, add the aqueous high molecular of its weight 7%, 25% furfural dregs, the gallic acid of 0.6%, the flyash of 15%, mix, then carry out fine grinding, what fine grinding was less than 0.074mm to granularity is greater than 60%;
(2) spherolite is prepared: the compound getting step (1) fine grinding, add the described caking agent of compound weight 3.0%, the coke powder of 6.5% and 10.5% Wingdale, Homogeneous phase mixing, add water-wet, control pelletizing moisture 8.5%, then by pelletizer pelletizing, spherolite Task-size Controlling is at 10mm; Caking agent described in step (2) is made up of the component of following weight percent: manganate 50%, Sodium salts humic acids 20%, polyacrylamide 10%, starch 20%; In described pelletizer balling process, Balling time is 15min, shatter strength of green pellet 8 times/0.5m, ultimate compression strength 15N/, burst temperature 500 DEG C.
(3) sinter: the pellet surface of step (2) gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 700mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 6%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 7%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains finished product agglomerate, described drying temperature is 450 DEG C, and dry negative pressure is 6KPa, and time of drying is 8min, and described ignition temperature is 1200 DEG C, and igniting negative pressure is 5KPa.
The sintering index of the present embodiment 3 is: agglomerate yield rate 89.02%, and sinter quality is 3.88t/m
2.h, barrate strength is 85.89%, and solid fuel consumption is 62.02kg/t.
Claims (7)
1. a manganese mineral powder sintering process, is characterized in that: comprise the following steps:
(1) breeze fine grinding: get manganese mineral powder, add the aqueous high molecular of its weight 5-7%, the furfural dregs of 15-25%, the gallic acid of 0.4-0.6%, the flyash of 15-25%, mix, then carry out fine grinding, what fine grinding was less than 0.074mm to granularity is greater than 60%;
(2) spherolite is prepared: the compound getting step (1) fine grinding, add the solvent of the described caking agent of compound weight 1.5-3.0%, the fuel of 4.5-6.5% and 8.5-10.5%, Homogeneous phase mixing, add water-wet, control pelletizing moisture 8.0-8.5%, then by pelletizer pelletizing, spherolite Task-size Controlling is at 5-10mm;
(3) sinter: the pellet surface of step (2) gained is wrapped one deck fuel, load sinter machine, cloth, bed of material floor height is 600-700mm, use atomizing sprayer for sinter mixture is with addition of moisture in described sintering machine distributing operation, described atomizing sprayer comprises the multiple atomizers be arranged in sinter machine, atomizer is arranged on the different positions in cloth short transverse, atomizer is communicated with water source by water-supply line, water-supply line is provided with water control valve, on sinter machine in the compound bed of material, top cloth adopts little water distribution quantity, moisture is 5-6%, the lower part cloth of the bed of material adopts large water distribution quantity, moisture is 7-8%, sintering of lighting a fire after super-dry, preheating again makes heat sinter, and heat sinter, through overcooling, fragmentation and screening, obtains finished product agglomerate.
2. manganese mineral powder sintering process according to claim 1, is characterized in that: the furfural dregs described in step (1) take corn cob as the residue waste residue that raw material sulphuric acid method produces furfural.
3. manganese mineral powder sintering process according to claim 1, is characterized in that: the caking agent described in step (2) is made up of the component of following weight percent: manganate 10-50%, Sodium salts humic acids 5-40%, polyacrylamide 10-40%, starch 5-20%.
4. manganese mineral powder sintering process according to claim 1, is characterized in that: the fuel described in step (2) is one or both in coke powder, hard coal.
5. manganese mineral powder sintering process according to claim 1, is characterized in that: the solvent described in step (2) is the one in unslaked lime, Wingdale.
6. manganese mineral powder sintering process according to claim 1, it is characterized in that: in the pelletizer balling process described in step (2), Balling time is 10-15min, and shatter strength of green pellet is greater than 4 times/0.5m, ultimate compression strength is greater than 10N/, and burst temperature is higher than 300 DEG C.
7. manganese mineral powder sintering process according to claim 1, it is characterized in that: described in step (3), drying temperature is 400-450 DEG C, dry negative pressure is 5-6KPa, and time of drying is 5-8min, described ignition temperature is 1100-1200 DEG C, and igniting negative pressure is 5-6KPa.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273575A (en) * | 1978-03-31 | 1981-06-16 | Mineracoes Brasileiras Reunidas S.A. | Process for transforming fines of iron or manganese into raw-material for sintering |
| CN102899482A (en) * | 2012-10-09 | 2013-01-30 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN102965077A (en) * | 2012-11-23 | 2013-03-13 | 东南大学 | Powdered ore additive |
| CN103014326A (en) * | 2012-12-28 | 2013-04-03 | 长沙矿冶研究院有限责任公司 | Sintering process of manganese ore powder |
-
2015
- 2015-02-06 CN CN201510064538.3A patent/CN104630455A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273575A (en) * | 1978-03-31 | 1981-06-16 | Mineracoes Brasileiras Reunidas S.A. | Process for transforming fines of iron or manganese into raw-material for sintering |
| CN102899482A (en) * | 2012-10-09 | 2013-01-30 | 李兴文 | Isothermal sintering process of iron ore powder |
| CN102965077A (en) * | 2012-11-23 | 2013-03-13 | 东南大学 | Powdered ore additive |
| CN103014326A (en) * | 2012-12-28 | 2013-04-03 | 长沙矿冶研究院有限责任公司 | Sintering process of manganese ore powder |
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Application publication date: 20150520 |