CN103031430A - Method for making sintering bed charge by returning mine at high mixture ratio - Google Patents
Method for making sintering bed charge by returning mine at high mixture ratio Download PDFInfo
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- CN103031430A CN103031430A CN2011103031949A CN201110303194A CN103031430A CN 103031430 A CN103031430 A CN 103031430A CN 2011103031949 A CN2011103031949 A CN 2011103031949A CN 201110303194 A CN201110303194 A CN 201110303194A CN 103031430 A CN103031430 A CN 103031430A
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Abstract
The invention discloses a method for making a sintering bed charge by returning mine at a high mixture ratio. The method comprises the following steps of: mixing 50-75 percent by mass of sintering return mine serving as a major raw material with 10-35 percent by mass of high-grade fine particle iron-containing material, 5-20 percent by mass of iron-containing sludge and 5-10 percent by mass of bonding agent, and stirring; pressing a mixture into blocks on a ball press; and drying and baking to obtain the sintering bed charge. The high-grade fine particle iron-containing material is one or more of sheet iron, steel scale and high-grade concentrate fines, and the content of the material of which the granularity is less than 0.074 millimeters is over 85 percent. The bonding agent consists of 25-55 percent by weight of bentonite and 45-75 percent by weight of starch. The sintering productivity rises, the fuel consumption in a sintering procedure is lowered, and the production cost is reduced.
Description
Technical field
The invention belongs to the iron-smelting raw material production technical field, relate to the production technology of agglomerate, particularly relate to and a kind ofly adopt high mixture ratio to return mine to make the method for agglomerate grate-layer material.
Background technology
In ironmaking production, returning mine is the undersized product after the screening in the whole grain of the sintering process, and it is comprised of short grained agglomerate and a part of insufficiently burnt raw material.Its size range is 0～5mm, because its granularity is little, can have a strong impact on the ventilation property of blast furnace, so usually return the sintering plant production of again preparing burden, and the suitable amount of allocating into of returning mine can be improved the ventilation property of the agglomerate bed of material, promote the generation of low melting point liquid phase and improve desulfurization degree, so in conventional at present pellet agglomerate batching, the weight percent of returning mine is generally 10%～30%.
In the research of returning mine was used, Chinese patent CN02114055.3 had announced the method for a kind of ion dust mud contaning and sinter return fine recycling.Content is to return mine as ball, it and ion dust mud contaning is stirred, and utilize moisture in the ion dust mud contaning, makes small sintering ore roll ion dust mud contaning and waste material powder outward and forms the compound that granularity is moderate, Gong the sintering plant of uniform ingredients recycles.Chinese patent CN90109395.5 has announced the core balls nodulizing manufacture method of returning mine, and content is that pellet screening is directly participated in batching, and pelletizing is produced pellet.
And in the research of sintering bed material, Chinese patent CN95116471.6 has announced a kind of technique, is primarily characterized in that to adopt lime as grate-layer material, not only saves agglomerate, can also produce lime.Chinese patent CN01108718.8 has announced a kind of manufacture method of hearth layer ball of sintered ore, its step comprises gets the raw material that ironworks dedusting mud 20%～30%, ironworks blast furnace dust 10%～20%, chemical plant sulfate slag 50%～60%, iron ore extract powder 10%～20%, wedding agent 8%～12% make iron content 〉=50%, sulfur-bearing≤1% by weight, after the mixed rolling of machinery, be pressed at pressing machine
Ball, seasoning 1～2 day namely obtains hearth layer ball of sintered ore for iron-smelting.Chinese patent CN01145342.7 has announced a kind of limonite method as grate-layer material in producing the pellet agglomerate method, is primarily characterized in that to adopt limonite to replace the finished product agglomerate as grate-layer material.
In the SINTERING PRODUCTION of routine, the production of grate-layer material and the utilization of returning mine still have the following disadvantages at present:
(1) returns mine and be not utilized effectively, can only again enter batching, need to consume the energy, cause the waste of resource and the energy.
(2) in SINTERING PRODUCTION, the dosage of returning mine too much can cause and actually enter the stove agglomerate and reduce, and the utilization ratio of agglomerate reduces.
(3) utilize the finished product agglomerate as grate-layer material, both wasted resource, reduced again production efficiency, the agglomerate production cost is improved.
Summary of the invention
For the deficiencies in the prior art, the present invention can provide a kind of sinter return fine that utilizes in a large number to be main raw material, makes and can substitute the briquetting of finished product agglomerate as the method for sintering bed material.
For addressing the above problem, technical scheme of the present invention is:
A kind of method that adopts high mixture ratio to return mine to make the sintering bed material, comprise with sinter return fine as main raw material, by following quality percentage composition proportioning itself and higher-grade particulate iron-bearing auxiliary material, iron containing sludge and binding agent are carried out mix and blend, sinter return fine 50%～75%, higher-grade particulate iron-bearing auxiliary material 10%～35%, iron containing sludge 5%～20%, binding agent 5%～10%, compound is briquetting on ball press, and again drying roasting namely obtains the sintering bed material.
Higher-grade particulate iron-bearing auxiliary material is one or more of iron sheet, iron scale, higher-grade fine ore, and granularity＜0.074mm accounts for more than 85%.
Binding agent is be by weight percentage 25%～55% wilkinite and 45%～75% starch.
Effect of the present invention is:
(1) avoided telling a part of finished product agglomerate from the finished product screen sub-system and done grate-layer material, thereby productivity of sinter is risen, the sintering circuit fuel consumption reduces, and reduces production costs;
(2) make accumulation return mine and the byproduct of some Steel Plant is utilized effectively, can energy-saving and emission-reduction, boost productivity.
Embodiment
The present invention is further described below in conjunction with embodiment:
Embodiment 1
Various raw materials are prepared burden by following mass percent proportioning: sinter return fine 50%, particulate iron scale are 35%, iron containing sludge 5%, wilkinite and starch 10%.To return mine, iron containing sludge, particulate iron scale, wilkinite and starch (by weight percentage 55% wilkinite and 45% starch) mixes.Compound is put into the roller ball press again and carried out briquetting, the briquetting specification is 15mm * 15mm * 30mm, dries at last roasting.Gained briquetting after testing grade TFe is that 56%, FeO is 6.70%, and low temperature reduction degradation index after the briquetting drying (less than 0.5mm) is 5.44%.
Embodiment 2
Various raw materials are prepared burden by following mass percent proportioning: sinter return fine 60%, particulate iron scale and iron sheet are 20%, iron containing sludge 15%, wilkinite and starch 5%.To return mine, iron containing sludge, particulate iron scale and iron sheet, wilkinite and starch (by weight percentage 40% wilkinite and 60% starch) mixes.Compound is put into the roller ball press again and carried out briquetting, the briquetting specification is 15mm * 15mm * 30mm, dries at last roasting.Gained briquetting after testing grade TFe is that 55.2%, FeO is 7.90%, and low temperature reduction degradation index after the briquetting drying (less than 0.5mm) is 8.56%.
Embodiment 3
Various raw materials are prepared burden by following mass percent proportioning: sinter return fine 75%, particulate iron scale, iron sheet and higher-grade fine ore are 15%, iron containing sludge 5%, wilkinite and starch 5%.To return mine, iron containing sludge, particulate iron scale, iron sheet and higher-grade fine ore, wilkinite and starch (by weight percentage 25% wilkinite and 75% starch) mixes.Compound is put into the roller ball press again and carried out briquetting, the briquetting specification is 15mm * 15mm * 30mm, dries at last roasting.Gained briquetting after testing grade TFe is that 54%, FeO is 9.60%, and low temperature reduction degradation index after the briquetting drying (less than 0.5mm) is 9.34%.
Claims (3)
1. method that adopts high mixture ratio to return mine to make the sintering bed material, comprise with sinter return fine as main raw material, by following quality percentage composition proportioning itself and higher-grade particulate iron-bearing auxiliary material, iron containing sludge and binding agent are carried out mix and blend, sinter return fine 50%～75%, higher-grade particulate iron-bearing auxiliary material 10%～35%, iron containing sludge 5%～20%, binding agent 5%～10%, compound is briquetting on ball press, and again drying roasting namely obtains the sintering bed material.
2. described employing high mixture ratio is returned mine and is made the method for sintering bed material according to claim 1, it is characterized in that described higher-grade particulate iron-bearing auxiliary material is one or more of iron sheet, iron scale, higher-grade fine ore, and granularity＜0.074mm accounts for more than 85%.
3. employing high mixture ratio according to claim 1 is returned mine and is made the method for sintering bed material, it is characterized in that described binding agent is for being by weight percentage 25%～55% wilkinite and 45%～75% starch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110303194.9A CN103031430B (en) | 2011-09-29 | 2011-09-29 | Method for making sintering bed charge by returning mine at high mixture ratio |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110303194.9A CN103031430B (en) | 2011-09-29 | 2011-09-29 | Method for making sintering bed charge by returning mine at high mixture ratio |
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| CN103031430A true CN103031430A (en) | 2013-04-10 |
| CN103031430B CN103031430B (en) | 2015-03-11 |
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| CN201110303194.9A Active CN103031430B (en) | 2011-09-29 | 2011-09-29 | Method for making sintering bed charge by returning mine at high mixture ratio |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468939A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Cold press palletizing bonding agent and preparation method thereof |
| CN103820636A (en) * | 2014-03-05 | 2014-05-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for increasing yield of titanium-type agglomerate schreyerite |
| CN106755985A (en) * | 2016-12-20 | 2017-05-31 | 江苏省冶金设计院有限公司 | The composite dry powder binding agent and iron powder forming method of iron powder shaping |
| CN114015869A (en) * | 2021-10-27 | 2022-02-08 | 重庆臻焱节能环保科技有限公司 | Cold-pressed ball production process based on sintering return ores |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385255A (en) * | 2002-04-15 | 2002-12-18 | 湘潭钢铁集团有限公司 | Iron-containing mud and sintered return mine reuse method |
| CN1621541A (en) * | 2004-12-14 | 2005-06-01 | 白俊卿 | Process for preparing pellet from high-grade ironstone by using direct dry method |
-
2011
- 2011-09-29 CN CN201110303194.9A patent/CN103031430B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385255A (en) * | 2002-04-15 | 2002-12-18 | 湘潭钢铁集团有限公司 | Iron-containing mud and sintered return mine reuse method |
| CN1621541A (en) * | 2004-12-14 | 2005-06-01 | 白俊卿 | Process for preparing pellet from high-grade ironstone by using direct dry method |
Non-Patent Citations (1)
| Title |
|---|
| 庞勇: "烧结冷返矿与转炉尘泥混合配用实践", 《柳钢科技》, 15 March 1996 (1996-03-15) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468939A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Cold press palletizing bonding agent and preparation method thereof |
| CN103468939B (en) * | 2013-09-06 | 2016-02-24 | 鞍钢股份有限公司 | A kind of coal-pressing ball and preparation method thereof |
| CN103820636A (en) * | 2014-03-05 | 2014-05-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for increasing yield of titanium-type agglomerate schreyerite |
| CN106755985A (en) * | 2016-12-20 | 2017-05-31 | 江苏省冶金设计院有限公司 | The composite dry powder binding agent and iron powder forming method of iron powder shaping |
| CN114015869A (en) * | 2021-10-27 | 2022-02-08 | 重庆臻焱节能环保科技有限公司 | Cold-pressed ball production process based on sintering return ores |
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| CN103031430B (en) | 2015-03-11 |
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