CN1560286A - Preparation method for making block of dust mud of smelting steel by high pressure and cold solidifing - Google Patents
Preparation method for making block of dust mud of smelting steel by high pressure and cold solidifing Download PDFInfo
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- CN1560286A CN1560286A CNA2004100061548A CN200410006154A CN1560286A CN 1560286 A CN1560286 A CN 1560286A CN A2004100061548 A CNA2004100061548 A CN A2004100061548A CN 200410006154 A CN200410006154 A CN 200410006154A CN 1560286 A CN1560286 A CN 1560286A
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Abstract
The invention relates to a method of preparing high-pressure cold-agglomerating blocks of steel-making dust and mud, drying the dust and mud with water content greater than 8% in a roller-type drier, then naturally cooling in a drag bar conveyer to make the water content reduced to 5-8%, where the temperature is not higher than 80 deg.C, and then batching different varieties of dust and mud by an electronic computer; stirring the raw materials by a blender, adding in binding agent and rolling, stirring again by the blender, extruding and making blocks on an extruder, and making the bulk density of the block up to 3.5-3.6 g/ cu cm; feeding the semifinished high-pressure blocks onto the drier to dry by hot air, so as to make the water content in the dried finished product not more than 2%; putting in storeroom and storing. The invention can make all the dust and mud into blocks, the amount of mixed-in binding agent is low, the iron-contain grade of the product is high, the strength is high and the water content is low, saving resources and beneficial to environmental protection.
Description
Technical field
The present invention relates to a kind of steel making dust slime comprehensive utilization of solid scraps method, the preparation method of the fixed agglomeration of particularly a kind of steel making dust slime cold high pressure.
Background technology
At present, converter steelmaking is extensively adopted in China's steel-making, converter steelmaking output has accounted for more than 80% of the whole output of steels of China, and wet dust removal (OG method) is adopted in converter steelmaking more, and a kind of waste of the converter dust of handling with the wet dust removal method is the dirt mud (often claiming OG method mud) of converter dust-removing.Contain iron, calcium oxide, magnesium oxide etc. in the converter steelmaking dirt mud, it is a kind of iron-containing waste that the value utilized is arranged.But in converter steelmaking dirt mud, because the water content height, granularity is thinner, and it is difficult to recycle, and often causes the pollution to the steelworks environment.
At present, steel making dust slime is mainly as agglomerating batching, but can only utilize wherein a part seldom, and major part goes out of use.According to reports, also have now and in steel making dust slime, add other industry dry powder dirt, with cement, cement clinker, lime, wilkinite etc. is binding agent, on general balling disk (-sc) or briquetting press, be shaped, cause agglomerate by seasoning or artificial maintenance, its shortcoming is that this agglomerate intensity is low, and ferrous grade descends manyly in the agglomerate, influences final product quality.
Summary of the invention
The objective of the invention is to improve the shortcoming of prior art and a kind of preparation method who all utilizes the fixed agglomeration of cold high pressure of steel making dust slime is provided, so that a kind of intensity height, iron-holder agglomerate how to be provided, in order to as the refrigerant, slag former of steel-making, substitute imported iron ore stone or, solve the environmental pollution of converter steelmaking factory for medium and small blast furnace provides iron-smelting raw material.
For achieving the above object, the present invention takes following technical scheme, sees also shown in Figure 1.
At first, water content is carried out drying treatment greater than 8% steel making dust slime in rotating drum type drying machine, send chain mat machine then to and carry out naturally cooling, make its water content reduce to 5～8%; Temperature is not more than 80 ℃;
Secondly, with the steel making dust slime of cooled different ferrous grades, the robot calculator batching is carried out in the requirement of its ferrous grade according to agglomerate; Because steel grade, process for making and equipment difference that each steelworks is produced, ferrous grade also has difference in the steel making dust slime of its generation, for guaranteeing that clumps quality needs, and can be mixed the steel making dust slime of different ferrous grades, to reach the requirement of agglomerate to its ferrous grade;
The 3rd goes on foot, and confected materials stirs with stirrer earlier, puts into wheel roller adding binding agent then and rolls, and stirs through stirrer again, and the mixing of three roads is stirred, in order to improve the agglomeration performance of material;
Described caking agent can be the combination of polyvinyl formal, silica flour, spent pulping liquor or wherein any two kinds of caking agents;
The proportioning of steel making dust slime raw material and caking agent is 100: 1-3;
In the 4th step, carry out high-pressure molding; On extrusion machine, push agglomeration, the long-pending density of diplomatic corps's block reaches 3.5-3.6 gram/cubic centimetre;
The 5th step, carry out the finished product oven dry, the work in-process of high pressure agglomeration are delivered to and are used hot-air seasoning on the conveyor dryer, and described hot blast is the composite ventilated of Recycle design, makes agglomerate dried finished product water content be not more than 2%;
In the 6th step, after the finished product drying treatment, it is standby to deliver in the stockyard storage.
Steel making dust slime raw material and agglomerate finished product will be dried processing, and the waste gas of its oven dry is drawn by exhaust blower, after habitual dust-removal system is handled, reach the discharging standards discharging.Described habitual dust-removal system is that equipment such as water-bath, tornado dust collector, sack cleaner are formed.
The inventive method can all be made agglomerate with the steel making dust slime that steelworks is discharged, and its binder amount of allocating into is few, the ferrous grade height of product, and the intensity height, water content is low, alternative imported iron ore stone; Economize on resources, environmental, can accomplish the steel making dust slime zero release.
Description of drawings
Fig. 1 represents the inventive method schema
Embodiment
See also shown in Figure 1ly, the inventive method is as follows; At first, be that 35% steel making dust slime carries out drying treatment in rotating drum type drying machine with water content, send chain mat machine then to and carry out naturally cooling, make its water content reduce to 7%; Temperature is 80 ℃;
Secondly, with the steel making dust slime of cooled different ferrous grades, the robot calculator batching is carried out in the requirement of its ferrous grade according to agglomerate;
In the 3rd step, confected materials stirs with stirrer earlier, puts into wheel roller adding binding agent then and rolls, and stirs through stirrer again, and in order to improve the agglomeration performance of material, described caking agent is polyvinyl formal and spent pulping liquor; The usage ratio of its polyvinyl formal and spent pulping liquor is 2: 1;
The proportioning of steel making dust slime raw material and caking agent is 100: 1.5;
In the 4th step, carry out high-pressure molding; On extrusion machine, push agglomeration, the long-pending density of diplomatic corps's block is 3.5-3.6 gram/cubic centimetre;
The 5th step, carry out the finished product oven dry, the work in-process of high pressure agglomeration are delivered to and are used hot-air seasoning on the conveyor dryer, and described hot blast is the composite ventilated of Recycle design, and making the dried finished product water content is 2%;
In the 6th step, after the finished product drying treatment, it is standby that conveyor is delivered in the stockyard storage.
Steel making dust slime raw material and agglomerate finished product will be dried processing, and the waste gas of its oven dry is drawn by exhaust blower, after habitual dust-removal system is handled, reach the discharging standards discharging.Described habitual dust-removal system is that equipment such as water-bath, tornado dust collector, sack cleaner are formed.
Once with 500 tons of steel making dust slime tests, the main chemical of its raw material was as follows for present embodiment:
Iron-holder 40-45% silica 1 2-15% calcium oxide 15-20%
Sulphur 0.1-0.12% phosphorus 0.028% water 40%
Its agglomerate chemical ingredients and physical performance index are as follows:
Agglomerate main chemical compositions: iron-holder 52.16% silica 1 .62% calcium oxide 16.85%
Sulphur 0.12% phosphorus 0.028%
The agglomerate physicals: physical dimension is oval spherical, 40 millimeters 20 millimeters; Outward appearance is complete smooth, and situation is better; Product intensity 1500-2000 newton/.During hot strength meets, small furnace uses standard.
Embodiment 2
See also shown in Figure 1ly, the inventive method is as follows; At first, be that 30% steel making dust slime carries out drying treatment with water content in the cartridge type dryer, send chain mat machine then to and carry out naturally cooling, make its water content reduce to 5%; Temperature is 80 ℃;
Secondly, with cooled different varieties steel making dust slime, the robot calculator batching is carried out in the requirement of its ferrous grade according to agglomerate;
Go into binding agent and roll, stir through stirrer, in order to improve the agglomeration performance of material, described caking agent is spent pulping liquor and polyvinyl formal, and its usage ratio is 1: 1;
The proportioning of steel making dust slime raw material and caking agent is 100: 3;
In the 4th step, carry out high-pressure molding; On extrusion machine, push agglomeration, making the caking volume density is 3.5-3.6 gram/cubic centimetre;
In the 3rd step, confected materials stirs with stirrer earlier, puts into wheel roller then and adds for the 5th step, carry out the finished product oven dry, the work in-process of high pressure agglomeration are delivered to and are used hot-air seasoning on the conveyor dryer, described hot blast is the composite ventilated of Recycle design, and making the dried finished product water content is 2%;
In the 6th step, after the finished product drying treatment, it is standby to deliver in the stockyard storage through conveyor.
Steel making dust slime raw material and agglomerate finished product will be dried processing, and the waste gas of its oven dry is discharged by exhaust blower, after commonly using the dust-removal system processing, reach the discharging standards discharging.The described dust-removal system of commonly using is that equipment such as water-bath, tornado dust collector, sack cleaner are formed.
Embodiment 3
See also shown in Figure 1ly, the inventive method is as follows; At first, be that 40% steel making dust slime carries out drying treatment with water content in the cartridge type dryer, send chain mat machine then to and carry out naturally cooling, make its water content reduce to 8%; Temperature is 80 ℃;
Secondly, with cooled different varieties steel making dust slime, the robot calculator batching is carried out in the requirement of its ferrous grade according to agglomerate;
In the 3rd step, confected materials stirs with stirrer earlier, puts into wheel roller adding binding agent then and rolls, stir through stirrer again, in order to improve the agglomeration performance of material, described caking agent is spent pulping liquor and polyvinyl formal and silica flour, and its usage ratio is 1: 1;
The proportioning of steel making dust slime raw material and caking agent is 100: 2;
In the 4th step, carry out high-pressure molding; On extrusion machine, push agglomeration, making the caking volume density is 3.5-3.6 gram/cubic centimetre;
The 5th step, carry out the finished product oven dry, the work in-process of high pressure agglomeration are delivered to and are used hot-air seasoning on the conveyor dryer, and described hot blast is the composite ventilated of Recycle design, and making the dried finished product water content is 2%;
In the 6th step, after the finished product drying treatment, it is standby to deliver in the stockyard storage through conveyor.
Steel making dust slime raw material and agglomerate finished product will be dried processing, and the waste gas of its oven dry is drawn by exhaust blower, after habitual dust-removal system is handled, reach the discharging standards discharging.Described habitual dust-removal system is that equipment such as water-bath, tornado dust collector, sack cleaner are formed.
Claims (3)
1, the preparation method of the fixed agglomeration of a kind of steel making dust slime cold high pressure is characterized in that:
At first, water content is carried out drying treatment greater than 8% steel making dust slime in rotating drum type drying machine, send chain mat machine then to and carry out naturally cooling, make its water content reduce to 5～8%; Temperature is not more than 80 ℃;
Secondly, with cooled different varieties steel making dust slime, the robot calculator batching is carried out in the requirement of its ferrous grade according to agglomerate;
The 3rd goes on foot, and confected materials stirs with stirrer earlier, puts into wheel roller adding binding agent then and rolls, and stirs through stirrer again, and the mixing of three roads is stirred, and the proportioning of steel making dust slime raw material and caking agent is 100: 1-3;
The 4th step, carry out high-pressure molding, on extrusion machine, push agglomeration, making the caking volume density is 3.5-3.6 gram/cubic centimetre.;
The 5th step, carry out the finished product oven dry, the work in-process of high pressure agglomeration are delivered to and are used hot-air seasoning on the conveyor dryer, make the dried finished product water content be not more than 2%;
In the 6th step, after the finished product drying treatment, it is standby to deliver in the stockyard storage.
2, the preparation method of the fixed agglomeration of a kind of steel making dust slime cold high pressure according to claim 1 is characterized in that: described caking agent is the combination of polyvinyl formal, silica flour, spent pulping liquor or wherein any two kinds of caking agents.
3, the preparation method of the fixed agglomeration of a kind of steel making dust slime cold high pressure according to claim 1 is characterized in that: described steel making dust slime raw material and agglomerate finished product will be dried processing, and the waste gas of its oven dry is drawn by exhaust blower, discharges after dust removal process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410006154 CN1244708C (en) | 2004-03-04 | 2004-03-04 | Preparation method for making block of dust mud of smelting steel by high pressure and cold solidifing |
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| CN 200410006154 CN1244708C (en) | 2004-03-04 | 2004-03-04 | Preparation method for making block of dust mud of smelting steel by high pressure and cold solidifing |
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| CN1560286A true CN1560286A (en) | 2005-01-05 |
| CN1244708C CN1244708C (en) | 2006-03-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140016A (en) * | 2011-02-21 | 2011-08-03 | 重庆大学 | High-temperature liquid material granulation and heat recovery system |
| CN102002583B (en) * | 2009-09-03 | 2012-07-25 | 西南科技大学 | Palletizing method of iron ore powder |
| CN102766497A (en) * | 2012-06-28 | 2012-11-07 | 北京国能普华环保工程技术有限公司 | Lignite semi-coke powder shaping device |
| CN102925675A (en) * | 2011-07-27 | 2013-02-13 | 宝钢集团有限公司 | Method for recovering sludge from smelting ironmaking |
| CN103627896A (en) * | 2013-11-28 | 2014-03-12 | 四川省川威集团有限公司 | Production method for production of metallurgical dust slime balls |
| CN110295282A (en) * | 2019-07-24 | 2019-10-01 | 深圳市中金岭南有色金属股份有限公司 | A kind of blast furnace returning charge briquetting technique |
-
2004
- 2004-03-04 CN CN 200410006154 patent/CN1244708C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002583B (en) * | 2009-09-03 | 2012-07-25 | 西南科技大学 | Palletizing method of iron ore powder |
| CN102140016A (en) * | 2011-02-21 | 2011-08-03 | 重庆大学 | High-temperature liquid material granulation and heat recovery system |
| CN102925675A (en) * | 2011-07-27 | 2013-02-13 | 宝钢集团有限公司 | Method for recovering sludge from smelting ironmaking |
| CN102925675B (en) * | 2011-07-27 | 2014-04-30 | 宝钢集团有限公司 | Method for recovering sludge from smelting ironmaking |
| CN102766497A (en) * | 2012-06-28 | 2012-11-07 | 北京国能普华环保工程技术有限公司 | Lignite semi-coke powder shaping device |
| CN103627896A (en) * | 2013-11-28 | 2014-03-12 | 四川省川威集团有限公司 | Production method for production of metallurgical dust slime balls |
| CN110295282A (en) * | 2019-07-24 | 2019-10-01 | 深圳市中金岭南有色金属股份有限公司 | A kind of blast furnace returning charge briquetting technique |
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| Publication number | Publication date |
|---|---|
| CN1244708C (en) | 2006-03-08 |
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Owner name: BEIJING KEMELLON TECHNOLOGY DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: BEIJING JINSHENGYOU METALLURGY NEW TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20090417 |
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Effective date of registration: 20090417 Address after: 503A, F, Rome garden, 18 Hui Xin West Street, Beijing, Chaoyang District Patentee after: Beijing Kemei long Technology Development Co. Ltd. Address before: Room E-1201, Rome garden, 18 Huixin West Street, Beijing, Chaoyang District Patentee before: Jinshengyou Metallurgy New Technology Development Co., Ltd., Beijing |
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Granted publication date: 20060308 Termination date: 20120304 |