CN101109027A - Method for producing ball iron with iron scale - Google Patents
Method for producing ball iron with iron scale Download PDFInfo
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- CN101109027A CN101109027A CNA2007101392787A CN200710139278A CN101109027A CN 101109027 A CN101109027 A CN 101109027A CN A2007101392787 A CNA2007101392787 A CN A2007101392787A CN 200710139278 A CN200710139278 A CN 200710139278A CN 101109027 A CN101109027 A CN 101109027A
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Abstract
The invention specifically relates to an approach to produce granular pig iron by oxide iron sheet which belongs to the metallurgical iron making technology field. The invention mainly solves the problem of recycling the waste oxide iron sheet to make steelmaking materials. The special points of the technology are described below: according to the weight unit, the materials are oxide iron sheet (65 per cent to 75 per cent in weight ratio), coal powder (18 per cent to 30 per cent), lime (4 per cent to 8 per cent) and binder (1 per cent to 12 per cent). The above materials are crushed, marbled, reduced and separated to produce finished granular pig iron. The invention is characterized in that: the production has high iron containing but low sulphur and other miscellaneous substances contained, therefore can be taken as the steelmaking material in replacement of waste steel or pig iron, alleviating the tension situation of steel making material lacking; effectively using the mass waste oxide iron sheet of the steel and iron enterprises, the invention turns the waste to the treasure and lowers the production cost greatly; the technical process is easy, the equipment cost is low and the realization is easy. As a newly developed and innovated and advanced technology, the invention is expected to become an important direction of iron steel manufacturing technology.
Description
Technical field
Utilize high temperature reduction to produce a kind of method of granulated iron after the present invention relates to a kind of non-blast furnace ironmaking method, particularly iron scale and coal dust mixing, belong to metallurgical ironmaking technology field.
Background technology
The steel scrap and the pig iron are one of main raw materials of modern converter steel-making, and the steel scrap and the pig iron shared ratio in the converter steel iron charge can be controlled in 0～30%.High-quality steel scrap resource is less at present, and price is higher, and the recovery rate of iron of ordinary scrap steel is lower, the general sulfur-bearing phosphorus of pig is higher, and price is also than higher, and the iron and steel starting material are day by day in short supply, price sharply raises up, and steel-making cost is sharp risen, and has limited STEELMAKING PRODUCTION.Therefore part iron enterprise attempts to adopt sponge iron or metal pelletizing to replace the steel scrap or the pig iron, but because the degree of metalization of sponge iron and metallized pellet is lower, cooling power is too big, join eat a large amount of sponge iron or metal pelletizing after, the molten steel heat is not enough, tapping temperature is lower, and the steel-making quantity of slag is big, causes the converter splash easily.The increase of sulphur content has also strengthened the burden of refining desulfuration in the while steel, makes not this method of pilot production of most iron and steel enterprises.On the other hand, the steel rolling process in iron and steel enterprise, can produce a large amount of iron scales every day, contains higher ferrous components in these iron scales, but owing to do not find effective recycling approach as yet, major part all is taken as offal treatment, causes waste of material.Because of the present circumstance, the development and use iron scale replaces the steel scrap or the pig iron as the converter steelmaking raw material, reduces the STEELMAKING PRODUCTION cost, is the problem that iron and steel enterprise's active demand solves.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method that can effectively utilize the steel rolling waste to produce the producing ball iron with iron scale of steelmaking feed.
The alleged problem of the present invention is solved by following technical scheme:
A kind of method of producing ball iron with iron scale, special feature are that it is made up of following step:
A. prepare burden: 65～75 parts of iron scales, 18～30 parts of coal dusts, 4～8 parts in lime, 1～12 part of binding agent are got by unit by weight, above-mentioned raw materials is crushed to granularity-100 order reaches more than 50%, add 5～15 parts of mixings of water;
B. make ball: the above-mentioned raw material that is mixed is made the spheroid of diameter 20～30mm, oven dry;
C. reduction: above-mentioned spheroid is put into stove, be rapidly heated to 1350～1480 ℃ constant temperature 8～12min, furnace cooling with 100～150 ℃/min;
D. sorting: the above-mentioned raw material of handling through reduction is obtained finished product granulated iron after fragmentation, magnetic separation, screening.
The method of above-mentioned producing ball iron with iron scale, described raw material iron scale iron-holder 60～70%, coal powder fraction and fugitive constituent≤25%, lime contain calcium oxide 〉=60%, and described binding agent is water glass or wilkinite.
The method of above-mentioned producing ball iron with iron scale, described finished product granulated iron TFe 〉=90%, C≤4.5%, S:0.02～0.16%, Si≤0.5%, granularity 3～50mm.
The inventive method is main raw material with the iron scale, rational proportion reductive agent, slag former, binding agent equal size, and heat is to reduction temperature again after system ball, oven dry, and the postcooling that reduces is come out of the stove, and obtains can be used for the granular iron of steelmaking feed.These method characteristics are as follows: 1. its product granulated iron iron-holder height, sulfur-bearing and other impurity level are low, can be used as the converter steelmaking raw material substitution steel scrap or the pig iron, alleviate the situation of steelmaking feed anxiety; 2. effectively utilize a large amount of depleted iron scales of iron and steel enterprise, Fei Weibao is gathered materials on the spot, become to raw materials for production, reduces enterprise's production cost; 3. technology is simple, equipment input expense is low, be easy to realization.Based on These characteristics, the inventive method is as one of emerging, ground-breaking cutting edge technology, can overcome big, the shortcomings such as energy consumption is high, long flow path of blast furnace ironmaking investment effectively, adapt to the trend that modern steel enterprise constantly develops to densification, high efficiency, serialization, noble and unsullied purification and environmentally friendly direction better, be expected to become the important development direction of Iron and Steel Production technology.
Embodiment
The inventive method is a major ingredient with the iron scale, is equipped with coal dust and makees reductive agent, and lime is done sweetening agent and slag former, joins a certain amount of water glass or wilkinite again and makees binding agent and be mixed into piece, adopt the electrically heated reduction after, again through making granulated iron after fragmentation, magnetic separation, the screening.Be the high Fe contained and low sulfur content of assurance product, above-mentioned each ingredient requirement iron scale iron-holder 60～70%, coal powder fraction and fugitive constituent≤25%, lime contain calcium oxide 〉=60%, and described binding agent is selected water glass or wilkinite for use.
Below provide several specific embodiments:
Embodiment 1. unit by weight gets 70 parts of iron scales, 24 parts of coal dusts, 7 parts of lime, 2 parts of wilkinites, is crushed to granularity-100 purpose and reaches more than 50%, adds 5 parts of mixings of water.Make the ball of diameter 20～30mm size with shaped device, in baking oven, dry to constant weight.Above-mentioned spheroid is put into electric furnace, be rapidly heated to 1350 ℃, constant temperature 10 min, furnace cooling with 100 ℃/min.Through after fragmentation, magnetic separation, the screening slag iron being separated, obtain finished product granulated iron again.The granulated iron of producing reaches following index: TFe=90%, C=4.3%, S=0.026%, Si=0.33%, granularity 5～20mm.
Embodiment 2. unit by weight gets 75 parts of iron scales, 30 parts of coal dusts, 8 parts of lime, 6 parts of wilkinites, is crushed to granularity-100 purpose and reaches more than 50%, adds 15 parts of mixings of water.Make the ball of diameter 20～30mm size with shaped device, in baking oven, dry to constant weight.Above-mentioned spheroid is put into electric furnace, be rapidly heated to 1380 ℃ constant temperature 12min, furnace cooling with 120 ℃/min.Through after fragmentation, magnetic separation, the screening slag iron being separated, obtain finished product granulated iron again.The granulated iron of producing reaches following index: TFe=92%, C=4.0%, S=0.083%, Si=0.27%, granularity 20～50mm.
Embodiment 3. unit by weight gets 65 parts of iron scales, 18 parts of coal dusts, 4 parts of lime, 1 part of wilkinite, is crushed to granularity-100 purpose and reaches more than 50%, adds 10 parts of mixings of water.Make the ball of diameter 20～30mm size with shaped device, in baking oven, dry to constant weight.Above-mentioned spheroid is put into electric furnace, be rapidly heated to 1480 ℃ constant temperature 8min, furnace cooling with 150 ℃/min.Through after fragmentation, magnetic separation, the screening slag iron being separated, obtain finished product granulated iron again.The granulated iron of producing reaches following index: TFe=94%, C=2.7%, S=0.061%, Si=0.20%, granularity 10～40mm.
Embodiment 4. unit by weight gets 75 parts of iron scales, 30 parts of coal dusts, 6 parts of lime, 12 parts of water glass, is crushed to granularity-100 purpose and reaches more than 50%, adds 8 parts of mixings of water.Make the ball of diameter 20mm size with shaped device, in baking oven, dry to constant weight.Above-mentioned spheroid is put into electric furnace, be rapidly heated to 1400 ℃ constant temperature 12min, furnace cooling with 130 ℃/min.Through after fragmentation, magnetic separation, the screening slag iron being separated, obtain finished product granulated iron again.The granulated iron of producing reaches following index: TFe=93%, C=4.0%, S=0.065%, Si=0.15%, granularity 20～50mm.
Claims (3)
1. the method for a producing ball iron with iron scale is characterized in that, it is made up of following step;
A. batching: by weight unit get 65～75 parts of iron scales, 18～30 parts of coal dusts, 4～8 parts in lime, 1～12 part of binding agent, above-mentioned raw materials is crushed to granularity-100 order reaches more than 50%, add 5～15 parts of mixings of water;
B. make ball: the above-mentioned raw material that is mixed is made the spheroid of diameter 20～30mm, oven dry;
C. reduction: above-mentioned spheroid is put into stove, be rapidly heated to 1350～1480 ℃ constant temperature 8～12min, furnace cooling with 100～150 ℃/min;
D. sorting: the above-mentioned raw material of handling through reduction is obtained finished product granulated iron after fragmentation, magnetic separation, screening.
2. the method for producing ball iron with iron scale according to claim 1 is characterized in that: described raw material iron scale iron-holder 60～70%, and coal powder fraction and fugitive constituent≤25%, lime contain calcium oxide 〉=60%, and described binding agent is water glass or wilkinite.
3. the method for producing ball iron with iron scale according to claim 1 and 2 is characterized in that: described finished product granulated iron TFe 〉=90%, C≤4.5%, S:0.02～0.16%, Si≤0.5%, granularity 3～50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101392787A CN101109027A (en) | 2007-08-24 | 2007-08-24 | Method for producing ball iron with iron scale |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101392787A CN101109027A (en) | 2007-08-24 | 2007-08-24 | Method for producing ball iron with iron scale |
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| CN101109027A true CN101109027A (en) | 2008-01-23 |
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| CNA2007101392787A Pending CN101109027A (en) | 2007-08-24 | 2007-08-24 | Method for producing ball iron with iron scale |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220445A (en) * | 2011-05-27 | 2011-10-19 | 吴道洪 | Iron-making method by direct reduction-grinding separation treatment of iron oxide scale through rotary hearth furnace |
| CN102352421A (en) * | 2011-09-28 | 2012-02-15 | 钢铁研究总院 | Process for smelting industrial pure iron with converter waste slag ball iron |
| CN105400952A (en) * | 2015-11-07 | 2016-03-16 | 衡南扬钢冶金技术有限公司 | Preparation method for furnace burden briquets or pellets or blocks applied to ironmaking |
| CN109735714A (en) * | 2019-01-30 | 2019-05-10 | 鲍君杰 | A kind of processing method of stainless steel oxidation skin |
| CN111154972A (en) * | 2020-01-21 | 2020-05-15 | 鞍钢股份有限公司 | Preparation method of spherical granular iron for steelmaking |
| CN111154971A (en) * | 2020-01-17 | 2020-05-15 | 山东泰山钢铁集团有限公司 | Pellet kiln coating particle for sintering ingredients and preparation method thereof |
| CN112981095A (en) * | 2021-02-08 | 2021-06-18 | 山西太钢不锈钢股份有限公司 | Iron scale ball pressing process |
| CN114107779A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Manufacturing method of ultrathin hot-rolled wide strip steel |
-
2007
- 2007-08-24 CN CNA2007101392787A patent/CN101109027A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220445A (en) * | 2011-05-27 | 2011-10-19 | 吴道洪 | Iron-making method by direct reduction-grinding separation treatment of iron oxide scale through rotary hearth furnace |
| CN102352421A (en) * | 2011-09-28 | 2012-02-15 | 钢铁研究总院 | Process for smelting industrial pure iron with converter waste slag ball iron |
| CN102352421B (en) * | 2011-09-28 | 2013-01-09 | 钢铁研究总院 | Process for smelting industrial pure iron with converter waste slag ball iron |
| CN105400952A (en) * | 2015-11-07 | 2016-03-16 | 衡南扬钢冶金技术有限公司 | Preparation method for furnace burden briquets or pellets or blocks applied to ironmaking |
| CN109735714A (en) * | 2019-01-30 | 2019-05-10 | 鲍君杰 | A kind of processing method of stainless steel oxidation skin |
| CN111154971A (en) * | 2020-01-17 | 2020-05-15 | 山东泰山钢铁集团有限公司 | Pellet kiln coating particle for sintering ingredients and preparation method thereof |
| CN111154972A (en) * | 2020-01-21 | 2020-05-15 | 鞍钢股份有限公司 | Preparation method of spherical granular iron for steelmaking |
| CN114107779A (en) * | 2020-08-26 | 2022-03-01 | 宝山钢铁股份有限公司 | Manufacturing method of ultrathin hot-rolled wide strip steel |
| CN112981095A (en) * | 2021-02-08 | 2021-06-18 | 山西太钢不锈钢股份有限公司 | Iron scale ball pressing process |
| CN112981095B (en) * | 2021-02-08 | 2023-01-31 | 山西太钢不锈钢股份有限公司 | Iron scale ball pressing process |
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