CN105714105A - High-temperature sintering technology for nickel mineral powder - Google Patents
High-temperature sintering technology for nickel mineral powder Download PDFInfo
- Publication number
- CN105714105A CN105714105A CN201610108824.XA CN201610108824A CN105714105A CN 105714105 A CN105714105 A CN 105714105A CN 201610108824 A CN201610108824 A CN 201610108824A CN 105714105 A CN105714105 A CN 105714105A
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- China
- Prior art keywords
- sintering
- powder
- nickel minerals
- mineral powder
- temperature
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Classifications
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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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
-
- 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
Abstract
The invention discloses a high-temperature sintering technology for nickel mineral powder. The nickel mineral powder is composed of raw materials including, by weight percent, 35%-50% of the nickel mineral powder, 8%-10% of carbon powder, 10%-15% of iron powder, 0.6%-3% of a bonding agent, 3%-5% of fuel and 8%-15% of a fluxing agent. Compared with the prior art, the high-temperature sintering technology has the beneficial effects that a sintering method for the nickel mineral powder is simple in technological method and convenient to operate, additives such as waterborne macromolecules, furfural residues and coal ash are added in the fine grinding stage of the nickel mineral powder, an obvious grinding assisting effect is achieved, the activity of the mineral powder is effectively excited, and the reaction temperature of the mineral powder is reduced. Meanwhile, a segmented heating method is adopted in the high-temperature sintering process, the strength of sintered ore is improved, the yield of the sintered ore is increased, and consumption of solid fuel is reduced.
Description
Technical field
The present invention relates to sintering mineral powder technical field, specifically a kind of nickel minerals powder high temperature sintering work
Skill.
Background technology
Furnace charge refers to add Ore and other catalysis materials of smelting furnace, iron ore, steel billet, life
Ferrum, scrap iron and steel, breeze, coking coal, ferroalloy broadly fall into furnace charge.Nickel minerals powder is the one of furnace charge,
, there is solid fuel consumption high in the current method preparing nickel minerals powder, sinter strength is poor, one-tenth
Ball performance is low, breathability does not reaches the problem that blast furnace application requires, yields poorly, thin at nickel minerals powder
In grinder sequence, nickel minerals powder grindability is very poor, the fine grained easily group of connecing, and needs to consume in grinding process
Substantial amounts of energy and production time；And in sintering circuit, after bed of material surface ignition, with
Sintering process, in compound solid fuel ignition produce heat from bed of material top to bottom
Transfer, material layer temperature presents the trend stepped up from top to bottom, fuel concentrated combustion and burning
The auto accumulation heat effect of knot ore bed so that the bed of material the most down temperature is the highest, heat is the most, high temperature
Band is the widest, and therefore sintering process is an anisothermal process, and the maximum temperature in sinter bed
The thickness of migration velocity and combustion zone has the biggest shadow to the quality of sintering process and product quality
Ringing, after such as the bed of material thickens, solid fuel consumption reduces relatively, and the sintering top bed of material is because of warm
Amount is not enough and causes sinter strength to be deteriorated, decrease in yield, and finished product sintering deposit heterogeneity is raw
Product system sinter return rate increases, and deteriorates sintering process conditions etc..
Summary of the invention
It is desirable to provide a kind of nickel minerals powder high-sintering process.
The present invention provides following technical scheme:
A kind of nickel minerals powder high-sintering process, it is to comprise the following raw materials by weight percent:
Nickel minerals powder 35-50%, carbon dust 8-10%, iron powder 10-15%, binding agent 0.6-3%, combustion
Material 3-5% and flux 8-15%.
A kind of nickel minerals powder high-sintering process, comprises the following steps:
(1) breeze fine grinding: weigh nickel minerals powder, add its weight 5-7% aqueous high molecular,
The furfural dregs of 15-25%, the flyash of 16-24%, mix homogeneously, then carry out fine grinding to grain
Degree is less than 0.06mm, specific surface area 1400-1500cm2/g；
(2) spherolite is prepared: take the compound of step (1) fine grinding, add described weight percent
The carbon dust 8-10% of ratio, iron powder 10-15%, binding agent 0.6-3% and flux 8-15%, all
Even mixing, adds water-wet, controls pelletizing moisture 6.0-7.5%, then by pelletizer pelletizing,
Spherolite Task-size Controlling is at 8-12mm；
(3) sintering: the pellet surface of step (2) gained wraps a grate firing material, loads and burns
In knot machine, high temperature sintering of lighting a fire after drying, preheating makes heat sinter, heat sinter
Through supercooling, broken and screening, obtain finished product sintering deposit.
Fuel in described step (2) is one or both in coke powder, anthracite.
In pelletizer balling process in described step (2), Balling time is 15-18min,
Shatter strength of green pellet is more than 6 times/0.5m, and comprcssive strength is more than 8N/, and burst temperature is higher than
350℃。
Described flux is at least one in quick lime, limestone, slaked lime, dolomite, grain
Degree is less than 6mm.
In described step (3), high temperature sintering is divided into three phases: first stage temperature is 900-950
DEG C, warm-up time is 30-50min；Second stage temperature is 1000-1300 DEG C, warm-up time
For 100-120min；Phase III temperature is 900-1200 DEG C, and warm-up time is 60-80min.
Compared with the prior art, beneficial effects of the present invention: the sintering side of the nickel minerals powder of the present invention
Method, process is simple, easy to operate, by adding aqueous high score in the nickel minerals powder fine grinding stage
The additives such as son, furfural dregs and flyash, have significant grinding-aid effect, effectively excite breeze
Activity, reduces its reaction temperature, uses zone heating method in high temperature sintering operation simultaneously,
Improve sinter strength and Sintering Yield, save solid fuel consumption.
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 clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the present invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into this
The scope of bright protection.
1 one kinds of nickel minerals powder high-sintering process of embodiment, it is by the raw material of following percentage by weight
Composition: nickel minerals powder 45%, carbon dust 9%, iron powder 12%, binding agent 2%, fuel 4% and
Flux 12%.
A kind of nickel minerals powder high-sintering process, comprises the following steps:
(1) breeze fine grinding: weigh nickel minerals powder, add its weight 5-7% aqueous high molecular,
The furfural dregs of 15-25%, the flyash of 16-24%, mix homogeneously, then carry out fine grinding to grain
Degree is less than 0.06mm, specific surface area 1400-1500cm2/g；
(2) spherolite is prepared: take the compound of step (1) fine grinding, add described weight percent
The carbon dust 8-10% of ratio, iron powder 10-15%, binding agent 0.6-3% and flux 8-15%, all
Even mixing, adds water-wet, controls pelletizing moisture 6.0-7.5%, then by pelletizer pelletizing,
Spherolite Task-size Controlling is at 8-12mm；
(3) sintering: the pellet surface of step (2) gained wraps a grate firing material, loads and burns
In knot machine, high temperature sintering of lighting a fire after drying, preheating makes heat sinter, heat sinter
Through supercooling, broken and screening, obtain finished product sintering deposit.
Fuel in described step (2) is one or both in coke powder, anthracite.
In pelletizer balling process in described step (2), Balling time is 15-18min,
Shatter strength of green pellet is more than 6 times/0.5m, and comprcssive strength is more than 8N/, and burst temperature is higher than
350℃。
Described flux is at least one in quick lime, limestone, slaked lime, dolomite, grain
Degree is less than 6mm.
In described step (3), high temperature sintering is divided into three phases: first stage temperature is 900-950
DEG C, warm-up time is 30-50min；Second stage temperature is 1000-1300 DEG C, warm-up time
For 100-120min；Phase III temperature is 900-1200 DEG C, and warm-up time is 60-80min.
2 one kinds of nickel minerals powder high-sintering process of embodiment, it is by the raw material of following percentage by weight
Composition: nickel minerals powder 35%, carbon dust 8%, iron powder 10%, binding agent 0.6%, fuel 3%
With flux 8%.
A kind of nickel minerals powder high-sintering process, comprises the following steps:
(1) breeze fine grinding: weigh nickel minerals powder, add its weight 5-7% aqueous high molecular,
The furfural dregs of 15-25%, the flyash of 16-24%, mix homogeneously, then carry out fine grinding to grain
Degree is less than 0.06mm, specific surface area 1400-1500cm2/g；
(2) spherolite is prepared: take the compound of step (1) fine grinding, add described weight percent
The carbon dust 8-10% of ratio, iron powder 10-15%, binding agent 0.6-3% and flux 8-15%, all
Even mixing, adds water-wet, controls pelletizing moisture 6.0-7.5%, then by pelletizer pelletizing,
Spherolite Task-size Controlling is at 8-12mm；
(3) sintering: the pellet surface of step (2) gained wraps a grate firing material, loads and burns
In knot machine, high temperature sintering of lighting a fire after drying, preheating makes heat sinter, heat sinter
Through supercooling, broken and screening, obtain finished product sintering deposit.
Fuel in described step (2) is one or both in coke powder, anthracite.
In pelletizer balling process in described step (2), Balling time is 15-18min,
Shatter strength of green pellet is more than 6 times/0.5m, and comprcssive strength is more than 8N/, and burst temperature is higher than
350℃。
Described flux is at least one in quick lime, limestone, slaked lime, dolomite, grain
Degree is less than 6mm.
In described step (3), high temperature sintering is divided into three phases: first stage temperature is 900-950
DEG C, warm-up time is 30-50min；Second stage temperature is 1000-1300 DEG C, warm-up time
For 100-120min；Phase III temperature is 900-1200 DEG C, and warm-up time is 60-80min.
3 one kinds of nickel minerals powder high-sintering process of embodiment, it is by the raw material of following percentage by weight
Composition: nickel minerals powder 50%, carbon dust 10%, iron powder 15%, binding agent 3%, fuel 5%
With flux 15%.
A kind of nickel minerals powder high-sintering process, comprises the following steps:
(1) breeze fine grinding: weigh nickel minerals powder, add its weight 5-7% aqueous high molecular,
The furfural dregs of 15-25%, the flyash of 16-24%, mix homogeneously, then carry out fine grinding to grain
Degree is less than 0.06mm, specific surface area 1400-1500cm2/g；
(2) spherolite is prepared: take the compound of step (1) fine grinding, add described weight percent
The carbon dust 8-10% of ratio, iron powder 10-15%, binding agent 0.6-3% and flux 8-15%, all
Even mixing, adds water-wet, controls pelletizing moisture 6.0-7.5%, then by pelletizer pelletizing,
Spherolite Task-size Controlling is at 8-12mm；
(3) sintering: the pellet surface of step (2) gained wraps a grate firing material, loads and burns
In knot machine, high temperature sintering of lighting a fire after drying, preheating makes heat sinter, heat sinter
Through supercooling, broken and screening, obtain finished product sintering deposit.
Fuel in described step (2) is one or both in coke powder, anthracite.
In pelletizer balling process in described step (2), Balling time is 15-18min,
Shatter strength of green pellet is more than 6 times/0.5m, and comprcssive strength is more than 8N/, and burst temperature is higher than
350℃。
Described flux is at least one in quick lime, limestone, slaked lime, dolomite, grain
Degree is less than 6mm.
In described step (3), high temperature sintering is divided into three phases: first stage temperature is 900-950
DEG C, warm-up time is 30-50min；Second stage temperature is 1000-1300 DEG C, warm-up time
For 100-120min；Phase III temperature is 900-1200 DEG C, and warm-up time is 60-80min.
It is obvious to a person skilled in the art that the invention is not restricted to described one exemplary embodiment
Details, and without departing from the spirit or essential characteristics of the present invention, it is possible to it
His concrete form realizes the present invention.Therefore, no matter from the point of view of which point, all should be by embodiment
Regarding exemplary as, and be nonrestrictive, the scope of the present invention is by claims
Rather than described explanation limit, it is intended that by fall claim equivalency implication and
In the range of all changes include in the present invention.Although moreover, it will be appreciated that this specification
It is been described by according to embodiment, but the most each embodiment only comprises an independent technology
Scheme, this narrating mode of description is only for clarity sake, and those skilled in the art should
When using description as an entirety, the technical scheme in each embodiment can also be through suitable group
Close, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (6)
1. a nickel minerals powder high-sintering process, it is characterised in that it is by following weight hundred
The raw material composition of proportion by subtraction: nickel minerals powder 35-50%, carbon dust 8-10%, iron powder 10-15%, viscous
Knot agent 0.6-3%, fuel 3-5% and flux 8-15%.
A kind of nickel minerals powder high-sintering process the most according to claim 1, its feature exists
In, comprise the following steps:
(1) breeze fine grinding: weigh nickel minerals powder, add its weight 5-7% aqueous high molecular,
The furfural dregs of 15-25%, the flyash of 16-24%, mix homogeneously, then carry out fine grinding to grain
Degree is less than 0.06mm, specific surface area 1400-1500cm2/g；
(2) spherolite is prepared: take the compound of step (1) fine grinding, add described weight percent
The carbon dust 8-10% of ratio, iron powder 10-15%, binding agent 0.6-3% and flux 8-15%, all
Even mixing, adds water-wet, controls pelletizing moisture 6.0-7.5%, then by pelletizer pelletizing,
Spherolite Task-size Controlling is at 8-12mm；
(3) sintering: the pellet surface of step (2) gained wraps a grate firing material, loads and burns
In knot machine, high temperature sintering of lighting a fire after drying, preheating makes heat sinter, heat sinter
Through supercooling, broken and screening, obtain finished product sintering deposit.
A kind of nickel minerals powder high-sintering process the most according to claim 1, its feature exists
In: the fuel in described step (2) is one or both in coke powder, anthracite.
A kind of nickel minerals powder high-sintering process the most according to claim 1, its feature exists
In: in the pelletizer balling process in described step (2), Balling time is 15-18min,
Shatter strength of green pellet is more than 6 times/0.5m, and comprcssive strength is more than 8N/, and burst temperature is higher than
350℃。
A kind of nickel minerals powder high-sintering process the most according to claim 1, its feature exists
In: described flux is at least one in quick lime, limestone, slaked lime, dolomite, grain
Degree is less than 6mm.
A kind of nickel minerals powder high-sintering process the most according to claim 1, its feature exists
In: in described step (3), high temperature sintering is divided into three phases: first stage temperature is 900-950
DEG C, warm-up time is 30-50min；Second stage temperature is 1000-1300 DEG C, warm-up time
For 100-120min；Phase III temperature is 900-1200 DEG C, and warm-up time is 60-80min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610108824.XA CN105714105A (en) | 2016-02-26 | 2016-02-26 | High-temperature sintering technology for nickel mineral powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610108824.XA CN105714105A (en) | 2016-02-26 | 2016-02-26 | High-temperature sintering technology for nickel mineral powder |
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| CN105714105A true CN105714105A (en) | 2016-06-29 |
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| CN201610108824.XA Pending CN105714105A (en) | 2016-02-26 | 2016-02-26 | High-temperature sintering technology for nickel mineral powder |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090249921A1 (en) * | 2008-02-08 | 2009-10-08 | Vale Inco Limited | Process for production of nickel and cobalt using metal hydroxide, metal oxide and/or metal carbonate |
| CN101705356A (en) * | 2009-12-07 | 2010-05-12 | 中南大学 | Sintering technology of ferrochrome mineral powder |
| CN102643997A (en) * | 2012-04-09 | 2012-08-22 | 北京神雾环境能源科技集团股份有限公司 | Laterite-nickel ore processing method for efficiently recovering nickel resources |
| 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 |
| CN104630460A (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 iron ore powder |
-
2016
- 2016-02-26 CN CN201610108824.XA patent/CN105714105A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090249921A1 (en) * | 2008-02-08 | 2009-10-08 | Vale Inco Limited | Process for production of nickel and cobalt using metal hydroxide, metal oxide and/or metal carbonate |
| CN101705356A (en) * | 2009-12-07 | 2010-05-12 | 中南大学 | Sintering technology of ferrochrome mineral powder |
| CN102643997A (en) * | 2012-04-09 | 2012-08-22 | 北京神雾环境能源科技集团股份有限公司 | Laterite-nickel ore processing method for efficiently recovering nickel resources |
| 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 |
| CN104630460A (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 iron ore powder |
Non-Patent Citations (1)
| Title |
|---|
| 那树人: "《炼铁工艺学》", 30 September 2014, 冶金工业出版社 * |
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