CN103031430B - 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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- CN103031430B CN103031430B CN201110303194.9A CN201110303194A CN103031430B CN 103031430 B CN103031430 B CN 103031430B CN 201110303194 A CN201110303194 A CN 201110303194A CN 103031430 B CN103031430 B CN 103031430B
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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 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 manufacture the method for agglomerate grate-layer material.
Background technology
In ironmaking production, returning mine is sinter the undersized product in whole grain process after screening, and it is made up of short grained agglomerate and the insufficiently burnt raw material of a part.Its size range is 0 ~ 5mm, because its granularity is little, the ventilation property of blast furnace can be had a strong impact on, again to prepare burden production so usually return sintering plant, and the suitable amount of allocating into of returning mine can improve the ventilation property of the agglomerate bed of material, promote the generation of low melting point liquid phase and improve desulfurization degree, so in pellet agglomerate conventional at present batching, the weight percent of returning mine is generally 10% ~ 30%.
In the research of returning mine uses, Chinese patent CN02114055.3 discloses a kind of method that ion dust mud contaning and sinter return fine recycle.Content to be returned mine as ball, it and ion dust mud contaning to be stirred, and utilize the moisture in ion dust mud contaning, makes to roll outside small sintering ore ion dust mud contaning and waste powder and the granularity that formed is moderate, the compound of Gong the sintering plant of uniform ingredients recycling.Chinese patent CN90109395.5 discloses core balls nodulizing manufacture method of returning mine, and content is that pellet screening is directly participated in batching, and pelletizing produces pellet.
And in the research of sintering bed material, Chinese patent CN95116471.6 discloses a kind of technique, be primarily characterized in that and adopt lime as grate-layer material, not only save agglomerate, can also lime be produced.Chinese patent CN01108718.8 discloses a kind of manufacture method of hearth layer ball of sintered ore, its step comprise get ironworks dedusting mud 20% ~ 30% by weight, raw material that ironworks blast furnace dust 10% ~ 20%, chemical plant sulfate slag 50% ~ 60%, iron ore extract powder 10% ~ 20%, bonding agent 8% ~ 12% make iron content>=50%, sulfur-bearing≤1%, after the mixed rolling of machinery, pressing machine is pressed into
ball, seasoning 1 ~ 2 day, namely obtains hearth layer ball of sintered ore for iron-smelting.Chinese patent CN01145342.7 discloses a kind of limonite and is producing the method as grate-layer material in pellet agglomerate method, is primarily characterized in that and adopts limonite to replace finished product agglomerate as grate-layer material.
At present in the SINTERING PRODUCTION of routine, the production of grate-layer material and the utilization of returning mine, still have the following disadvantages:
(1) return mine and be not utilized effectively, back into batching, can only need to consume the energy, cause the waste of resource and the energy.
(2) in SINTERING PRODUCTION, dosage of returning mine too much can cause actual enter stove agglomerate reduce, the utilization ratio of agglomerate reduces.
(3) utilize finished product agglomerate as grate-layer material, both wasted resource, and again reduced production efficiency, agglomerate production cost is improved.
Summary of the invention
For the deficiencies in the prior art, the present invention can provide one to utilize sinter return fine for main raw material in a large number, and manufacture can substitute the method for briquetting as sintering bed material of finished product agglomerate.
For solving the problem, technical scheme of the present invention is:
A kind of adopt high mixture ratio return mine manufacture sintering bed material method, comprise using sinter return fine as main raw material, by following mass percentage 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, then drying roasting, namely obtains sintering bed material.
Higher-grade particulate iron-bearing auxiliary material be iron sheet, iron scale, higher-grade fine ore one or more, granularity < 0.074mm accounts for more than 85%.
What binding agent was is by weight percentage 25% ~ 55% wilkinite and 45% ~ 75% starch.
Effect of the present invention is:
(1) avoid and from finished product screen sub-system, separate a part of finished product agglomerate do grate-layer material, thus make productivity of sinter increase, sintering circuit fuel consumption reduces, and reduces production cost;
(2) make accumulation return mine and the byproduct of some Steel Plant is utilized effectively, can energy-saving and emission-reduction, boost productivity.
Embodiment
Below in conjunction with embodiment, the present invention is further described:
Embodiment 1
Prepared burden by following mass percent proportioning by various raw material: sinter return fine 50%, particulate iron scale is 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) will be uniformly mixed.Compound is put into roller ball press again and carry out briquetting, briquetting specification is 15mm × 15mm × 30mm, finally carries out oven dry roasting.Grade TFe is 56%, FeO to gained briquetting is after testing 6.70%, and after briquetting drying, low temperature reduction degradation index (being less than 0.5mm) is 5.44%.
Embodiment 2
Prepared burden by following mass percent proportioning by various raw material: 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) will be uniformly mixed.Compound is put into roller ball press again and carry out briquetting, briquetting specification is 15mm × 15mm × 30mm, finally carries out oven dry roasting.Grade TFe is 55.2%, FeO to gained briquetting is after testing 7.90%, and after briquetting drying, low temperature reduction degradation index (being less than 0.5mm) is 8.56%.
Embodiment 3
Prepared burden by following mass percent proportioning by various raw material: 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) will be uniformly mixed.Compound is put into roller ball press again and carry out briquetting, briquetting specification is 15mm × 15mm × 30mm, finally carries out oven dry roasting.Grade TFe is 54%, FeO to gained briquetting is after testing 9.60%, and after briquetting drying, low temperature reduction degradation index (being less than 0.5mm) is 9.34%.
Claims (1)
1. one kind adopt high mixture ratio return mine manufacture sintering bed material method, comprise using sinter return fine as main raw material, by following mass percentage proportioning by itself and higher-grade particulate iron-bearing auxiliary material, iron containing sludge and binding agent carry out mix and blend, sinter return fine 60% ~ 75%, higher-grade particulate iron-bearing auxiliary material 10% ~ 20%, iron containing sludge 5% ~ 20%, binding agent 5% ~ 10%, compound is briquetting on ball press, drying roasting again, namely obtain sintering bed material, described higher-grade particulate iron-bearing auxiliary material is iron sheet, iron scale, one or more of higher-grade fine ore, granularity < 0.074mm accounts for more than 85%, described binding agent is be the wilkinite of 25% ~ 55% and the starch of 45% ~ 75% by weight percentage.
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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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| 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 CN103031430A (en) | 2013-04-10 |
| CN103031430B true 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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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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 |
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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 |
|---|
| 烧结冷返矿与转炉尘泥混合配用实践;庞勇;《柳钢科技》;19960315;第14页3.4转炉尘泥对烧结矿燃烧速度的影响，3.5转炉尘泥对烧结矿强度的影响 * |
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