CN1718781A - Production method of iron ore agglomerate - Google Patents
Production method of iron ore agglomerate Download PDFInfo
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- CN1718781A CN1718781A CN 200510043719 CN200510043719A CN1718781A CN 1718781 A CN1718781 A CN 1718781A CN 200510043719 CN200510043719 CN 200510043719 CN 200510043719 A CN200510043719 A CN 200510043719A CN 1718781 A CN1718781 A CN 1718781A
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Abstract
A process for preparing the pellets of iron ore includes such steps as proportionally mixing iron ore powder, coke powder or coal powder, flux and adhesive, stirring, palletizing, and baking at 100-600 deg.C by the gas containing CO2 (at least 15%). It features that its content of fixed carbon is 8-18%.
Description
Technical field
The present invention relates to the Iron and Steel Production method, is a kind of production method of iron ore agglomerate.
Background technology
The production method of the iron-smelting raw material agglomerate of widespread use at present is generally: the different mixing equipment batch mixing of employing after powdered iron ore and the binder formulation, moistening mill or not moistening the mill back adopts balling disc or drum pelletizer rolling to make ball, or adopt extrusion machine extruding agglomeration, adopt palletizing shaft furnace or grate kiln or belt type roasting machine to dryout then and high-temperature melting is made iron-smelting raw material for the iron-smelting blast furnace use.In recent years, have to be reported in the iron ore raw material coke powder or the coal dust that add 5% below and to produce pelletizing, warp makes coal dust or coke powder play the effect of heat-generating agent in calcining kiln greater than 1000 ℃ temperature roasting, and the finished product agglomerate after firing is substantially free of carbon.Other has report to adopt to be lower than 15% the smart powder of iron to allocate cement and coal dust or coke powder into to form cooled agglomerated pellet.All there is some deficiency in these methods: energy consumption is big, and production efficiency is low, and the slag making sweetening effectiveness is not good enough etc.
Summary of the invention
The objective of the invention is, a kind of production method of iron ore agglomerate is provided, it can reach under the various technical requirements prerequisites of stipulating among the ministerial standard YB/T005-91, reduces energy consumption, enhance productivity, and easy slag making desulfurization etc.
The present invention for achieving the above object, be achieved through the following technical solutions: a kind of production method of iron ore agglomerate, the weight part of agglomerate material is: powdered iron ore 65-80 part, coke powder or coal dust 10-20 part, flux 5-15 part and binding agent 2-8 part, with above-mentioned mixing of materials evenly after, adopt pelletizer to roll and make ball or adopt punching press, extrusion equipment to force to make ball, form agglomerate, then agglomerate is inserted in the drying plant and under 100-600 ℃ of temperature, to adopt the gas drying that contains at least 15% gas concentration lwevel, form iron ore agglomerate.Described flux is Wingdale, and the desired gas temperature is 500-600 ℃ in the drying plant.Described flux is unslaked lime, and the desired gas temperature is 100-300 ℃ in the drying plant.Described binding agent is a water glass.What the granularity 5mm of described material powdered iron ore was following is at least 80%, and the granularity of flux and binding agent is at least 70% more than 200 orders.With mixing of materials evenly after, adopt damp mill fine grinding compound, make ball then.
The advantage of the inventive method is: because characteristics such as the component of used agglomerate material and bake out temperatures, make agglomerate that the present invention makes without high-temperature roasting, employing low-temperature flue gas oven dry, coal dust or coke powder still are retained in the agglomerate, make to contain fixed carbon in the agglomerate product can to reach the 8-18% assistant right; Product of the present invention can reach the various technical requirementss of stipulating among the ministerial standard YB/T005-91, the agglomerate resistance to compression be not less than 1500 newton/, tumbler index (+6.3mm) be not less than 86%, ferrous grade is not less than 45%; Product of the present invention is used to smelt iron, make steel the raw material of stove, is about 30% than prior art energy efficient, and at high temperature iron ore agglomerate itself has the autoreduction of ferriferous oxide, is easy to the slag making desulfurization, enhances productivity about 20% etc.Iron-bearing mineral is 65-80% in the finished product agglomerate, fixed carbon 8-18%, and containing lime carbonate is 7-15%.
Embodiment
Embodiment 1, material each component: 5 kilograms of 65 kilograms of powdered iron ore, 20 kilograms of coal dusts, 10 kilograms in unslaked lime stone and wilkinites, after adopting drum mixer to be mixed the above-mentioned material, adopt balling disc to make ball, form agglomerate, then agglomerate is inserted in the drying plant, under 500 ℃ of temperature, adopt the gas drying that contains at least 15% gas concentration lwevel to form the agglomerate product.
Embodiment 2, material each component: get and contain 80 kilograms of 80% 200 order granularity powdered iron ore, 10 kilograms of coke powders, 5 kilograms of 5 kilograms of unslaked limes and water glass, after adopting machine,massing to be mixed the above-mentioned material, adopt drum pelletizer to roll and make ball formation agglomerate, then agglomerate is inserted in the dryer, under 100 ℃ of temperature, adopt the gas drying that contains at least 15% gas concentration lwevel to form the agglomerate product.
Embodiment 3, material each component: 70 kilograms of powdered iron ore, 12 kilograms of coal dusts, 15 kilograms in Wingdale, 3 kilograms of water glass, adopt pressing equipment to force to make ball above-mentioned material, form agglomerate, then agglomerate is inserted in the drying plant, under 600 ℃ of temperature, adopt the gas drying contain at least 15% gas concentration lwevel to form the agglomerate product.
Embodiment 4, material each component: get and contain 85% 200 75 kilograms of order granularity powdered iron ore, 12 kilograms of coke powders, the above granularity of 200 orders reaches 2 kilograms of 11 kilograms of at least 70% unslaked limes and water glass, adopt machine,massing to mix above-mentioned material, after adopting damp mill fine grinding compound again, adopt the rolling pelletizer to make ball and form agglomerate, agglomerate is inserted under 300 ℃ of temperature, adopt the gas drying that contains 70% gas concentration lwevel to form the agglomerate product in the drying plant.
Embodiment 5, material each component: get and contain 8 kilograms of 95% 65 kilograms of above granularity powdered iron ore of 200 orders, 20 kilograms of coal dusts, 7 kilograms in Wingdale and water glass, after adopting drum mixer to mix the above-mentioned material, adopt extrusion machine to force to make ball, form agglomerate, then agglomerate is inserted under 550 ℃ of temperature, to adopt in the drying plant and contain at least 15% gas concentration lwevel gas drying, the formation iron ore agglomerate.
Iron-bearing mineral is 65-80% in the made the finished product agglomerate of the foregoing description, fixed carbon 8-18%, and containing lime carbonate is 7-15%.Various devices such as balling equipment described in the inventive method, drying plant, stirrer are known technology.Granularity in the inventive method after the mixing of materials is thin as far as possible, and the above quantity of 200 orders preferably reaches more than 60%, and the quantity more than granularity 200 orders of coal dust or coke powder, flux and binding agent is greater than more than 70% being the best.The product particle size that the inventive method is produced is generally 10-40mm.
Claims (6)
1, a kind of production method of iron ore agglomerate, it is characterized in that: the weight part of agglomerate material is: powdered iron ore 65-80 part, coke powder or coal dust 10-20 part, flux 5-15 part and binding agent 2-8 part, with above-mentioned mixing of materials evenly after, adopt pelletizer to roll and make ball or adopt punching press, extrusion equipment to force to make ball, form agglomerate, then agglomerate is inserted in the drying plant and under 100-600 ℃ of temperature, to adopt the gas drying that contains at least 15% gas concentration lwevel, form iron ore agglomerate.
2, a kind of production method of iron ore agglomerate according to claim 1, it is characterized in that: described flux is Wingdale, the desired gas temperature is 500-600 ℃ in the drying plant.
3, a kind of production method of iron ore agglomerate according to claim 1, it is characterized in that: described flux is unslaked lime, the desired gas temperature is 100-300 ℃ in the drying plant.
4, a kind of production method of iron ore agglomerate according to claim 1, it is characterized in that: described binding agent is a water glass.
5, according to claim 1,2,3 or 4 described a kind of production method of iron ore agglomerate, it is characterized in that: what the granularity 5mm of described material powdered iron ore was following is at least 80%, and the granularity of flux and binding agent is at least 70% more than 200 orders.
6, a kind of production method of iron ore agglomerate according to claim 1 is characterized in that: with mixing of materials evenly after, adopt damp mill fine grinding compound, make ball then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510043719 CN1718781A (en) | 2005-06-08 | 2005-06-08 | Production method of iron ore agglomerate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510043719 CN1718781A (en) | 2005-06-08 | 2005-06-08 | Production method of iron ore agglomerate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1718781A true CN1718781A (en) | 2006-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200510043719 Pending CN1718781A (en) | 2005-06-08 | 2005-06-08 | Production method of iron ore agglomerate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102666886A (en) * | 2009-11-17 | 2012-09-12 | 淡水河谷公司 | Ore fine agglomerate to be used in sintering process and production process of ore fines agglomerate |
| WO2023015765A1 (en) * | 2021-08-07 | 2023-02-16 | 湘潭炜达机电制造有限公司 | Iron ore powder briquetting method and an extrusion molding die |
-
2005
- 2005-06-08 CN CN 200510043719 patent/CN1718781A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102666886A (en) * | 2009-11-17 | 2012-09-12 | 淡水河谷公司 | Ore fine agglomerate to be used in sintering process and production process of ore fines agglomerate |
| WO2023015765A1 (en) * | 2021-08-07 | 2023-02-16 | 湘潭炜达机电制造有限公司 | Iron ore powder briquetting method and an extrusion molding die |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |