CN1162020A - Method for adhering solid fuel onto granulated sintered mixed material - Google Patents
Method for adhering solid fuel onto granulated sintered mixed material Download PDFInfo
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- CN1162020A CN1162020A CN 96102842 CN96102842A CN1162020A CN 1162020 A CN1162020 A CN 1162020A CN 96102842 CN96102842 CN 96102842 CN 96102842 A CN96102842 A CN 96102842A CN 1162020 A CN1162020 A CN 1162020A
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Abstract
This invention is a compounding method for outer adhered solid fuel on sintered mixture after it is formed into nodule. It features that iron-contained raw material, cold and hot returned ore, fluxing agent and additive for nadulization are first compounded according to a certain proportion, mixed by adding water in the mixter, then nodulized on a nodulizer, a certain quantity of solid fuel is mixed with the modulized mixture. This invention raises the strength of sintered ore, lowers the FeO content in sintered ore, and has low fuel consumption and low residual C content.
Description
The invention belongs to ironmaking agglomerate feedstock production technical field.
As everyone knows, the content of sintering mine FeO is subjected to the restriction of atmosphere in the bed of material in the sintering process, and for reducing FeO content in the agglomerate, many enterprises and research unit have made extensive work.The compound preparation method that generally adopts is earlier with iron-bearing material at present, flux, fuel, lime, after the batching of returning mine according to a certain ratio, add water and mix the back granulation, cloth on sinter machine then, igniting, sintering, cooling, screening obtains the finished product agglomerate after handling, since fuel earlier with granulation again after iron-bearing material mixes, most of solid fuel (coke powder or coal dust) is by thin breeze encirclement, makes the combustion conditions of fuel on sinter machine in the compound after the granulation relatively poor, selective oxidation atmosphere a little less than, cause iron protoxide higher, unburnt residual C amount is higher in the agglomerate, has reduced the intensity of agglomerate.The described sintering process of Chinese patent CN1025749C is with a part of coal dust and iron content compound, thin fine ore, fine ore, additive is returned mine, lime and a spot of fuel etc. mix the back and granulate, join a part of coal dust outward then, make solid fuel with addition of improvement has been arranged, but still exist complex manufacturing, residual C height of uncombusted and sinter strength are low in the agglomerate, the shortcoming that burnup is high.
The purpose of this invention is to provide a kind of sinter mixture adhering solid fuel onto granulated method.This method can be improved the combustion conditions of fuel on pallet in the sinter mixture, overcomes the high shortcoming of the residual C of uncombusted in the agglomerate, improves sinter strength, reduces FeO content and fuel consumption.
Major programme of the present invention is: with iron-bearing material, cold and hotly return mine, flux, granulation is with additive batching according to a certain ratio earlier, the batching back adds water and mixes in mixing machine, on pelletizer, granulate then, the compound after the granulation again with a certain amount of solid fuel, mix as coal dust or coke powder.Its proportioning is (weight %): iron-bearing material 55～80%, flux 3～15%, additive 3～10% cold and hotly returns mine 10～36%, the solid-fuelled amount of allocating into is: in coal dust or the coke powder any one or more 3～5%, pelletizing moisture content is 6.5～9%.
Flux can be in unslaked lime, slaked lime or the razor stone ashes any one or more, granularity≤1mm.
Additive can be in lime or the rhombspar any one or more, granularity≤3mm.
Cold and hot granularity≤the 5mm that returns mine accounts for more than 85%.
Iron-bearing material can adopt iron ore concentrate and iron-containing waste materials in iron and steel plant, and its proportioning (weight %) is: iron ore concentrate 65～100%, iron-containing waste materials in iron and steel plant 0～35%.
Iron ore concentrate granularity≤0.08mm accounts for more than 40%, and iron-containing waste materials in iron and steel plant granularity≤5mm accounts for more than 90%.
Iron-containing waste materials in iron and steel plant be in returning mine under blast furnace dedusting ash, sintering dust separation ash, sintering dust mud, the attached dirt ash of converter, the attached dirt ash of electric furnace, iron scale, slag or the blast furnace groove any one or more.Wherein the slag granularity is less than 5mm, and the water content of iron-containing waste materials in iron and steel plant is less than 35%.
The present invention compared with prior art has following advantage: the fuel amount of allocating into is regulated more flexible, and it is little to lag behind, and has improved the condition of fuel combustion on the sintering pallet, reduces fuel consumption, and FeO content is low in the agglomerate, and residual C content is low, and the intensity of agglomerate improves.
The invention process is in 24m
2On the belt vacuum fan, by the proportioning raw materials of above-mentioned technical process and table 1, table 2 is the sintering process and the technical indicator contrast of the embodiment of the invention and traditional method.
The proportioning raw materials of table 1. embodiment of the invention (weight %):
| Raw material | Iron ore concentrate | Unslaked lime | Cold and hot returning mine | Lime | Coal dust | Green-ball moisture content |
| Proportioning | ???58 | ???8 | ????23 | ???7.2 | ???3.8 | ????8 |
Table 2. embodiment of the invention and traditional method contrast
| The described technology of this patent | Traditional technology | |
| Ignition time branch | ???????2 | ??????2 |
| Ignition temperature ℃ | ??????1050 | ?????1050 |
| Gas consumption M 3/ t agglomerate | ??????64.2 | ?????69.7 |
| Bed thickness mm | ??????500 | ?????500 |
| Hot returning ore rate % | ??????18 | ?????23 |
| Solid fuel consumption Kg/t | ??????60.2 | ?????68.7 |
| Sintered ore rotary drum strength (ISO) % | ??????67 | ?????63 |
| FeO content % in the agglomerate | ??????10.3 | ?????13.2 |
| Residual C amount % in the agglomerate | ??????0.2 | ?????0.4 |
Claims (4)
1. sinter mixture adhering solid fuel onto granulated method, it is characterized in that earlier iron-bearing material, cold and hot returning mine, flux, granulation is pressed a proportion ingredient earlier with additive, in mixing machine, add water subsequently and mix, and after granulating on the pelletizer, more a certain amount of solid fuel is mixed with compound after the granulation.
2. the method for claim 1 is characterized in that said batching proportioning is (weight %): iron-bearing material 55～80%, and flux 3～15%, additive 3～10% cold and hotly returns mine 10～36%, solid fuel 3～5%.
3. method as claimed in claim 2, it is characterized in that said solid fuel be in coal dust or the coke powder any one or more, said flux is unslaked lime, in slaked lime or the razor stone ashes any one or more, additive be in lime or the rhombspar any one or more.
4. method as claimed in claim 1 or 2 is characterized in that said iron-bearing material is iron ore concentrate and iron-containing waste materials in iron and steel plant, and its proportioning is (weight %): iron ore concentrate 65～100%, iron-containing waste materials in iron and steel plant 0～35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102842 CN1162020A (en) | 1996-04-09 | 1996-04-09 | Method for adhering solid fuel onto granulated sintered mixed material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96102842 CN1162020A (en) | 1996-04-09 | 1996-04-09 | Method for adhering solid fuel onto granulated sintered mixed material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1162020A true CN1162020A (en) | 1997-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96102842 Pending CN1162020A (en) | 1996-04-09 | 1996-04-09 | Method for adhering solid fuel onto granulated sintered mixed material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162020A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736147B (en) * | 2009-11-13 | 2011-06-29 | 山西太钢不锈钢股份有限公司 | Compound sintering method for powdery iron-containing waste mini-pellets |
| CN103498046A (en) * | 2013-10-30 | 2014-01-08 | 中冶北方（大连）工程技术有限公司 | Process for mixing materials and making external-rolled coal through sintering machine |
| CN104694741A (en) * | 2015-03-26 | 2015-06-10 | 安徽工业大学 | New method for synchronously controlling pollutant emissions in sintering process on basis of layered material preparation and distribution |
| CN106282542A (en) * | 2015-05-13 | 2017-01-04 | 上海梅山钢铁股份有限公司 | A kind of collaborative discharge-reducing method of sintering process multiple pollutant |
| CN110358911A (en) * | 2019-08-14 | 2019-10-22 | 临沂玫德庚辰金属材料有限公司 | A kind of sinter production extra fuel technique |
-
1996
- 1996-04-09 CN CN 96102842 patent/CN1162020A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101736147B (en) * | 2009-11-13 | 2011-06-29 | 山西太钢不锈钢股份有限公司 | Compound sintering method for powdery iron-containing waste mini-pellets |
| CN103498046A (en) * | 2013-10-30 | 2014-01-08 | 中冶北方（大连）工程技术有限公司 | Process for mixing materials and making external-rolled coal through sintering machine |
| CN104694741A (en) * | 2015-03-26 | 2015-06-10 | 安徽工业大学 | New method for synchronously controlling pollutant emissions in sintering process on basis of layered material preparation and distribution |
| CN106282542A (en) * | 2015-05-13 | 2017-01-04 | 上海梅山钢铁股份有限公司 | A kind of collaborative discharge-reducing method of sintering process multiple pollutant |
| CN106282542B (en) * | 2015-05-13 | 2017-12-19 | 上海梅山钢铁股份有限公司 | A kind of collaboration discharge-reducing method of sintering process multiple pollutant |
| CN110358911A (en) * | 2019-08-14 | 2019-10-22 | 临沂玫德庚辰金属材料有限公司 | A kind of sinter production extra fuel technique |
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