CN1046140C - Sintering process for making cherry small ball by adding water soluble additives in iron concentrate - Google Patents
Sintering process for making cherry small ball by adding water soluble additives in iron concentrate Download PDFInfo
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- CN1046140C CN1046140C CN94110361A CN94110361A CN1046140C CN 1046140 C CN1046140 C CN 1046140C CN 94110361 A CN94110361 A CN 94110361A CN 94110361 A CN94110361 A CN 94110361A CN 1046140 C CN1046140 C CN 1046140C
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- iron ore
- borax
- ore concentrate
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- sintering
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Abstract
The present invention relates to a sintering process. The present invention is characterized in that water-soluble additives which can improve the granulating and balling performance of iron ore concentrates are provided and used for sintering the mixed material of the iron ore concentrates into cherry type pellets with low internal basicity and high external basicity. Besides quicklime and rich ore removal, the present invention still has the advantages of high material layer, high vertical sintering speed, high yield, high sintering ore grade, power and coal saving, high quality and low cost.
Description
The present invention relates to a kind of iron ore concentrate sintered processing method, especially a kind of sintering process for making cherry small ball by adding water soluble additives in iron concentrate.
The amount of allocating into of the iron ore concentrate that present SINTERING PRODUCTION, granularity are more and more thinner is more and more, causes mixture granulation balling-up difficulty, and size composition is bad, and bed permeability is poor, and it is more and more difficult to improve sintering technology and economic indicator.Japan's " flat 2-4658 patent " proposition " is burnt till pellet sintering process (HPS) ", and No. 5 sinter machines are implemented in the Steel tube Co., Ltd Fushan, and consequently productivity and sinter strength all do not have to improve.The Anshan iron and steel plant steel grinds " double-sphere sintering technology " that is proposed, and also has complex process, and to the ingredient requirement strictness, acid ball intensity difference is difficult to problems such as the thick bed of material, never implements.Ma Ganggang grinds " the iron ore concentrate prefabricated grain sintering process " that is proposed, and also because of its used binding agent is a wilkinite, has problems such as reducing agglomerate iron grade, downgrade and costs an arm and a leg not implement.Strengthen granulation, improve the bed of material and sintering technology and economic indicator, become anxious problem to be solved.
The purpose of this invention is to provide a kind of method of granulating, reach volume increase, improve the quality, cut down the consumption of energy, increase the purpose of benefit with the complete thin concentrate of reinforced by additive.
Content of the present invention is: when sintered material, from the ferric charge proportioning, weigh up earlier a part as acid material, remaining material is expected as alkalescence, again acid material list solely being caused diameter is 2.5～6 millimeters acid mother bulb, make it the outer alkalescence material that rolls then, the diameter with cherry formula structure of making inside and be low basicity, skin and be high basicity is 4～10 millimeters a bead, and in the water of the required adding of making cherry small ball, allocated the water-soluble additive that can improve iron ore concentrate granulation balling property into, carry out cloth igniting sintering at last.
Above dual alkalinity＜1.0 of said acid material, dual alkalinity＞1.5 of alkalescence material, the shared ratio of acid material is 10%～80%.In order to improve the intensity of solid-fuelled combustion conditions and agglomerate, solid fuel and the flux required sintering process all fit in the alkalescence material.
For ball is made in reinforcement, the present invention has allocated the water-soluble additive that can improve iron ore concentrate granulation balling property in the water of the required adding of making cherry small ball, these water-soluble additive have the organic binder bond of synthetic resins, Mierocrystalline cellulose or special preparation, the adapted amount of this class additive is 0.2%～0.0001% of a compound amount, using method is that earlier it to be diluted with water to concentration be 10%～0.01% the aqueous solution, sprays into and makes in the ball materials.These water-soluble additive also have borax or borax class iron ore concentrate granulation agent, and wherein the prescription of borax class iron ore concentrate granulation agent is:
(1) proportioning of borax and calcium chloride is 1: 6～10
(2) proportioning of borax and glycerine (or urea or sucrose) is 1: 0.5～5
(3) proportioning of borax and polyacrylamide (or organic binder bond of synthetic resins or Mierocrystalline cellulose or special preparation) is 1: 0.5～0.01;
The adapted amount of borax or borax class iron ore concentrate granulation agent is 0.2%～0.001% of a compound amount, using method be earlier with it with water dissolution and to be diluted to concentration be 10%～0.01% the aqueous solution, spray into again and make in the ball materials;
Borax or borax class iron ore concentrate granulation agent also can be used to strengthen the granulation balling-up of existing sintering raw mix or pelletizing usefulness iron ore concentrate.
The present invention compares with existing sintering technology, has following advantage:
1, it is difficult that it has solved complete thin concentrate granulation, implements thick bed of material difficulty, problems such as sintering difficulty.
2, can cancel unslaked lime, the cancellation rich ore carries out sintering, and economic and technical norms still can be improved.Can increase production 30%, agglomerate economize on electricity 6kwh per ton, the 10kg that economizes on coal improves grade of sinter 0.15%, and iron protoxide reduces by 3%, and reductibility improves 7%, and tumbler index improves 6%, and powder reduces by 8%, and unit cost reduces by 3～10 yuan.
3, the present invention not only is suitable for newly-built sintering plant, is more suitable in the technological transformation to existing sintering plant.Its modification scheme is simple, and the construction time is short, less investment, and instant effect, it is big to produce economic benefit.
Embodiment: if the water-soluble additive of selecting for use is a borax class iron ore concentrate granulation agent, usage quantity is 0.02% of a compound amount, and proportioning belt per minute material loading amount 2.0t wherein contains iron ore concentrate 1.3t.Then: 1. batching: from iron ore concentrate, weigh up 0.8t (account for total stuff amount 40%) and send into acid material feeding system, rest materials 1.2t (iron ore concentrate 0.5t wherein, flux, return mine and solid fuel 0.7t altogether) is sent into alkalescence material feeding system.2. the additive preparation aqueous solution: get borax class iron ore concentrate granulation agent 0.0004t, pour the dose out powders groove into, being dissolved in water and being diluted to concentration is 2.0% the aqueous solution (adding water 0.0196t altogether).3. material is handled: acidity material drying (or adding forever) to its moisture is lower than the best makes ball moisture one percentage point; Simultaneously also the alkalescence material is added the water mixing, its moisture also is lower than the best and makes ball moisture one percentage point.4. make acid mother bulb: the acidity material is sent into balling disc, spray into above-mentioned aqueous solution 0.008t simultaneously, produce diameter and be 2.5～6 millimeters acid mother bulb.5. making cherry small ball: the acid mother bulb of the 0.8t that will make is sent into drum pelletizer together with 1.2t alkalescence material, spray into the above-mentioned aqueous solution of 0.012t simultaneously, in drum pelletizer, acid mother bulb is outer to be rolled the alkalescence material and grows up, and produces diameter at last and be 4～10 millimeters the bead with cherry formula structure.The amount of allocating into of the additive aqueous solution can be controlled by liquid meter.6. the cherry small ball cloth that will make to pallet, the sintering of lighting a fire.
Claims (4)
1, a kind of application additive is made cherry formula bead to the iron ore concentrate compound and is carried out agglomerating technology, it is characterized in that weighing up a certain proportion of ferric charge earlier when batching expects as acidity, remaining material is expected as alkalescence, again acid material list solely being caused diameter is 2.5～6 millimeters acid mother bulb, make it the outer alkalescence material that rolls then, making inside is low basicity, skin is that the diameter with cherry formula structure of high basicity is 4～10 millimeters a bead, and in the water of the required adding of making cherry small ball, allocated the water-soluble additive that can improve iron ore concentrate granulation balling property into, carry out cloth igniting sintering at last.
2, technology according to claim 1, dual alkalinity＜1.0 that it is characterized in that said acid material, dual alkalinity＞1.5 of alkalescence material, the shared ratio of acid material is 10%～80%, solid fuel that sintering process is required and flux all fit in the alkalescence material.
3, technology according to claim 1, it is characterized in that the said water-soluble additive that can improve iron ore concentrate granulation balling property is a synthetic resins, or the organic binder bond of Mierocrystalline cellulose or special preparation, its adapted amount is 0.2%～0.0001% of a compound amount, using method is that earlier it to be diluted with water to concentration be 10%～0.01% the aqueous solution, sprays into and makes in the ball materials.
4, the described technology of root a tree name claim 1 is characterized in that the said water-soluble additive that can improve iron ore concentrate granulation balling property is borax or borax class iron ore concentrate granulation agent, and wherein the prescription of borax class iron ore concentrate granulation agent is:
(1) proportioning of borax and calcium chloride is 1: 6～10.
(2) borax and glycerine or with urea or with the proportioning of sucrose all be 1: 0.5～5;
(3) borax and polyacrylamide or with Mierocrystalline cellulose with synthetic resins or with the proportioning of the organic binder bond of special preparation all be 1: 0.01～0.5;
The adapted amount of borax or borax class iron ore concentrate granulation agent is 0.2%～0.001% of a compound amount, using method be earlier with it with water dissolution and to be diluted to concentration be 10%～0.01% the aqueous solution, spray into again and make in the ball materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94110361A CN1046140C (en) | 1994-07-06 | 1994-07-06 | Sintering process for making cherry small ball by adding water soluble additives in iron concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94110361A CN1046140C (en) | 1994-07-06 | 1994-07-06 | Sintering process for making cherry small ball by adding water soluble additives in iron concentrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1114689A CN1114689A (en) | 1996-01-10 |
| CN1046140C true CN1046140C (en) | 1999-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94110361A Expired - Fee Related CN1046140C (en) | 1994-07-06 | 1994-07-06 | Sintering process for making cherry small ball by adding water soluble additives in iron concentrate |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103882224B (en) * | 2014-04-02 | 2016-01-06 | 四川金广实业（集团）股份有限公司 | A kind of manifold type sintering method of low-grade laterite nickel ore |
| CN106040088A (en) * | 2016-05-26 | 2016-10-26 | 佛山市唯格瓷砖有限责任公司 | Drying-method granulation process for improving particle strength |
| CN106755978A (en) * | 2016-11-15 | 2017-05-31 | 江苏省冶金设计院有限公司 | A kind of method and system of control laterite nickel ore pellets reduction swellability |
| CN106702147A (en) * | 2016-11-15 | 2017-05-24 | 江苏省冶金设计院有限公司 | Method and system for reducing reduction degradation of vanadium-titanium magnet pellets |
| CN106636623A (en) * | 2016-11-15 | 2017-05-10 | 江苏省冶金设计院有限公司 | Method for increasing reduction degree of ferrochromium pellet ore and special system for method |
| CN106591567A (en) * | 2016-11-15 | 2017-04-26 | 江苏省冶金设计院有限公司 | Method for restraining and reducing reduction degradation of iron sand pellets and system special for method for restraining and reducing reduction degradation of iron sand pellets |
| CN108796212A (en) * | 2017-04-28 | 2018-11-13 | 上海梅山钢铁股份有限公司 | A kind of method of the compound fine iron breeze production sinter of self-fluxing nature |
| CN110317948B (en) * | 2018-03-30 | 2021-05-07 | 上海梅山钢铁股份有限公司 | Sintering method of meishan iron ore concentrate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138020A (en) * | 1983-12-26 | 1985-07-22 | Nippon Steel Corp | Production of raw material to be sintered |
| CN1042188A (en) * | 1988-10-27 | 1990-05-16 | 冶金工业部钢铁研究总院 | Geminus temperature control sintering method |
| CN1044828A (en) * | 1989-02-13 | 1990-08-22 | 日本钢管株式会社 | Make the method for agglomerates of sintered pellets |
| BR9203748A (en) * | 1992-09-25 | 1993-04-20 | Siderurgica Nacional Sa | IRON MINING SUPERFINES SINTERIZATION PROCESS |
-
1994
- 1994-07-06 CN CN94110361A patent/CN1046140C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60138020A (en) * | 1983-12-26 | 1985-07-22 | Nippon Steel Corp | Production of raw material to be sintered |
| CN1042188A (en) * | 1988-10-27 | 1990-05-16 | 冶金工业部钢铁研究总院 | Geminus temperature control sintering method |
| CN1044828A (en) * | 1989-02-13 | 1990-08-22 | 日本钢管株式会社 | Make the method for agglomerates of sintered pellets |
| BR9203748A (en) * | 1992-09-25 | 1993-04-20 | Siderurgica Nacional Sa | IRON MINING SUPERFINES SINTERIZATION PROCESS |
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| Publication number | Publication date |
|---|---|
| CN1114689A (en) | 1996-01-10 |
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