CN101745641A - Method for grinding refined block iron by semi-autogenous grinding way - Google Patents
Method for grinding refined block iron by semi-autogenous grinding way Download PDFInfo
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- CN101745641A CN101745641A CN200810229928A CN200810229928A CN101745641A CN 101745641 A CN101745641 A CN 101745641A CN 200810229928 A CN200810229928 A CN 200810229928A CN 200810229928 A CN200810229928 A CN 200810229928A CN 101745641 A CN101745641 A CN 101745641A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 188
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 91
- 238000000227 grinding Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 12
- 230000001788 irregular Effects 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 7
- 239000012736 aqueous medium Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 abstract description 13
- 229910000831 Steel Inorganic materials 0.000 abstract description 11
- 239000010959 steel Substances 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 5
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 abstract 2
- 239000000203 mixture Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明涉及一种半自磨方式磨制精块铁的方法，该方法是利用粒铁本身具有不规则的粒度且比重较大的特点，用粒铁代替磨内的部分研磨体，使磨内研磨体的填充系数达到3.0-4.5％，磨内水介质的使用量为入磨物料的1-1.5倍。本发明克服了现有技术中的不足，为提高精块铁的产率、提高精块铁的粒度，提供一种半自磨方式磨制精块铁的方法。该方法基于精块铁的生产过程是将粒铁中钢渣去除的过程。因此，采用比重较大的粒铁作为部分研磨体，利用研磨体与粒铁或粒铁与粒铁之间相互碰撞、磨擦，使粒铁中钢渣去除而变为精块铁的方法。该方法可使精块铁产率提高，含水量降低。The invention relates to a method for grinding fine lump iron in a semi-self-grinding mode. The method utilizes the characteristics of irregular particle size and large specific gravity of granular iron, and uses granular iron to replace part of the grinding body in the mill, so that the The filling factor of the grinding body reaches 3.0-4.5%, and the amount of water medium used in the mill is 1-1.5 times that of the grinding material. The invention overcomes the deficiencies in the prior art, and provides a semi-self-grinding method for grinding refined lump iron in order to increase the yield of fine lump iron and increase the granularity of fine lump iron. The method is based on the process of removing steel slag from granular iron in the production process of refined lump iron. Therefore, use granular iron with a large specific gravity as part of the grinding body, and use the collision and friction between the grinding body and the granular iron or the granular iron and the granular iron to remove the steel slag in the granular iron and turn it into refined lump iron. The method can increase the yield of refined lump iron and reduce the water content.
Description
Technical field
The present invention relates to a kind of method that grinds refined block iron.
Background technology
Can form slag behind the smelting iron and steel, granulated iron in the slag is the mixture of iron and other bits, and recyclable raw material as steel-making ironmaking is along with development of science and technology, requirement to the smelting iron and steel quality is more and more higher, and the purity of iron can't satisfy smelting requirements in the granulated iron.Existing grinder, abrasive body weight is big, grinds granulated iron with this grinder, and the quality of product refined block iron and output are not high.
When adopting ∮ 3.2 * 6.0m wet type grid grinding machine to grind slag product granulated iron usually, granularity 10～the 50mm of granulated iron, full iron grade 55%, milling medium is the abrasive body of ∮ 120mm (single ball heavily is 7.5kg) 35 tons of steel balls and ∮ 80mm (single ball heavily is 2.5kg) 12.5 tons of two kinds of gratings of steel ball, and the activity coefficient of abrasive body is 40% in the mill.The refined block iron that when grinding granulated iron under water state is arranged, hour material loading amount is 20t, process all be sheet, granularity less than 20mm, productive rate 20%, all iron content greater than 93%, smart iron particle size is less than 2mm, productive rate 38%, all iron content 55%.The all iron content of the refined block iron product that promptly grinds out is qualified, but granularity is little, moisture is greater than 20%, and promptly the productive rate low water content is big; And smart iron powder all iron content is qualified but productive rate is higher relatively.
Summary of the invention
The present invention has overcome deficiency of the prior art, is the productive rate that improves refined block iron, the granularity that improves refined block iron, and a kind of method of grinding refined block iron by semi-autogenous grinding way is provided.This method is the process that slag in the granulated iron is removed based on the production process of refined block iron.Therefore, adopt the bigger granulated iron of proportion, utilize between abrasive body and granulated iron or granulated iron and the granulated iron and collide mutually, rub, make slag removal in the granulated iron and become the method for refined block iron as the part abrasive body.This method can make the refined block iron productive rate improve, and water content reduces.
In order to address the above problem, the present invention by the following technical solutions:
The method of grinding refined block iron by semi-autogenous grinding way, it is characterized in that, this method is to utilize granulated iron itself to have irregular granularity and the bigger characteristics of proportion, replace the interior part abrasive body of mill with granulated iron, make the activity coefficient of abrasive body in the mill reach 3.0-4.5%, the use amount of the interior aqueous medium of mill is 1-1.5 a times of mill feed material.
1. this method is that to utilize granulated iron itself to belong to Morse hardness be that 8 steel and Morse hardness are the mixture that 2 slag bonds together mutually, and granulated iron has irregular granularity and the bigger characteristics of proportion.Replace part abrasive body in the mill with granulated iron, the slag of ball surface is collided mutually at abrasive body and granulated iron, become flexible in the process of lapping until all coming off, thereby improve its ferrous grade.In the mill use amount of aqueous medium be mill feed material 1-1.5 doubly, because of abrasive body and granulated iron collide mutually, grind, the composition volume of iron reduces in the granulated iron, the composition of slag is loosening, thereby peels off slag formation refined block iron through the impulse force of water.
2. the grinding body gradation method is in this method: big abrasive body diameter is 2～3 times of raw material granulated iron diameter, and granulated iron replaces less abrasive body, and the activity coefficient of abrasive body is 3.0-4.5%.Treat the big abrasive body of particle diameter mill hour, will it not pick out, directly replenish the big abrasive body of particle diameter.
3. the use amount of grinding interior aqueous medium is 1-1.5 a times of mill feed material, looks into abrasive particle abrasive grit degree and selects ratio of water to material (the big ratio of water to material of granularity is little, otherwise so suitable).After granulated iron and abrasive body collided mutually, grind, the iron content part was because of the high volume of hardness can reduce, the slag inclusion part is loosening because of hardness Xiao Yi in the granulated iron.Under the momentum effect of water,, granulated iron forms refined block iron thereby peeling off slag.
Compared with prior art, the invention has the beneficial effects as follows:
1, granulated iron is ground into granularity 10～50mm and granularity and account for finished weight 15%, full iron grade greater than 90% refined block iron less than 20mm.
2. replace the interior part abrasive body of mill with granulated iron, alleviated mill load, mill output is brought up to 45～50t/h from 20t/h.The moisture content that goes out to grind refined block iron is less than 10%.
The specific embodiment
Be described in detail technical scheme of the present invention below by the specific embodiment.
Embodiment 1
The method of grinding refined block iron by semi-autogenous grinding way, this method adopts ∮ 3.2 * 6.0m wet type grid grinding machine that granulated iron is ground, replacing the diameter in the mill with granulated iron is the abrasive body steel ball of Φ 80mm, the heavy 2.5Kg of single ball, make the diameter that uses in the mill be 12.5 tons of the abrasive body steel balls of Φ 120mm, the heavy 7.5Kg of single ball, the activity coefficient of abrasive body is 3.52% in the mill, and the use amount of the interior aqueous medium of mill is 1.2 times of mill feed material.Hour material loading amount is that (full iron grade 55.0%, granularity are 10～50mm) to granulated iron 45t, produce refined block iron 14t, full iron grade 90.56%, moisture content 9.3%, granularity are 2t less than 20mm weight, produce smart iron powder 10t, full iron grade 55.56%, promptly the refined block iron productive rate is 32%, smart iron powder productive rate is 23.0%.
Embodiment 2
The method of grinding refined block iron by semi-autogenous grinding way, this method adopts ∮ 3.2 * 6.0m wet type grid grinding machine that granulated iron is ground, replacing the diameter in the mill with granulated iron is the abrasive body steel ball of Φ 80mm, the heavy 2.5Kg of single ball, make the diameter that uses in the mill be 13.5 tons of the abrasive body steel balls of Φ 120mm, the heavy 7.5Kg of single ball, the activity coefficient of abrasive body is 4.0% in the mill, and the use amount of the interior aqueous medium of mill is 1.5 times of mill feed material.Hour material loading amount is that (full iron grade 53.5%, granularity are 10～50mm) to 48t, produce refined block iron 17t, full iron grade 91.23%, moisture content 9.6%, granularity are 2t less than 20mm weight, produce smart iron powder 11t, full iron grade 55.78%, promptly the refined block iron productive rate is 36.0%, smart iron powder productive rate is 23.0%.
Claims (1)
1. the method for grinding refined block iron by semi-autogenous grinding way.It is characterized in that, this method is to utilize granulated iron itself to have irregular granularity and the bigger characteristics of proportion, replace grinding interior part abrasive body with granulated iron, make the activity coefficient of abrasive body in the mill reach 3.0-4.5%, the use amount of the interior aqueous medium of mill is 1-1.5 a times of mill feed material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810229928A CN101745641A (en) | 2008-12-19 | 2008-12-19 | Method for grinding refined block iron by semi-autogenous grinding way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810229928A CN101745641A (en) | 2008-12-19 | 2008-12-19 | Method for grinding refined block iron by semi-autogenous grinding way |
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| Publication Number | Publication Date |
|---|---|
| CN101745641A true CN101745641A (en) | 2010-06-23 |
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| CN200810229928A Pending CN101745641A (en) | 2008-12-19 | 2008-12-19 | Method for grinding refined block iron by semi-autogenous grinding way |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230820A (en) * | 2013-05-08 | 2013-08-07 | 醴陵市金山电瓷制造有限公司 | Method for ball milling of electric porcelain raw material |
-
2008
- 2008-12-19 CN CN200810229928A patent/CN101745641A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103230820A (en) * | 2013-05-08 | 2013-08-07 | 醴陵市金山电瓷制造有限公司 | Method for ball milling of electric porcelain raw material |
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Application publication date: 20100623 |