CN104404190A - Molten iron desiliconization agent, pouring device and molten iron desiliconization pretreatment method - Google Patents
Molten iron desiliconization agent, pouring device and molten iron desiliconization pretreatment method Download PDFInfo
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- CN104404190A CN104404190A CN201410639010.XA CN201410639010A CN104404190A CN 104404190 A CN104404190 A CN 104404190A CN 201410639010 A CN201410639010 A CN 201410639010A CN 104404190 A CN104404190 A CN 104404190A
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- desiliconization
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Abstract
The invention relates to the technical field of metallurgical industry hot molten iron desiliconization treatment, and discloses a molten iron desiliconization agent, a pouring device and a molten iron desiliconization pretreatment method. The molten iron desiliconization agent comprises iron oxide scale, lime powder and fluorite powder, and has the particle size of 2-5mm. The pouring device comprises a bracket and a material bin, a material inlet at the top of the material bin is connected a material outlet of a material storage device, the top of the material bin is provided with a weighing sensor, a vibration feeder is arranged below an material outlet of the material bin, the vibration feeder is arranged on the bracket, and a material outlet of the vibration feeder is provided with a discharge valve and an oscillating material tank. According to the molten iron desiliconization pretreatment method, the molten iron desiliconization agent poured by the molten iron desiliconization agent pouring device is used to complete the molten iron desiliconization pretreatment. The ironmaking blast furnace iron tapping time is used as the desiliconization reaction treatment time, and the molten iron desiliconization pretreatment objective can be achieved by reaction of molten iron and a desiliconization agent poured into a molten iron trough by use of flow potential energy of the molten iron in a blast furnace.
Description
Technical field
The present invention relates to metallurgy industry desiliconization of hot metal processing technology field, device and the pretreated method of desiliconization of hot metal are spread in a kind of desiliconization of hot metal agent specifically, throwing.
Background technology
Along with the demand of STEELMAKING PRODUCTION to low-phosphorous molten iron is growing, its most important process changeover utilizes blowing process in hot metal ladle or fish torpedo ladle, or first carry out the application of preconditioning technique of dephosphorization of molten iron at dephosphorization converter.But when dephosphorization of molten iron pre-treatment, the avidity due to element silicon in molten iron and oxygen is greater than the avidity of phosphorus and oxygen, thus when silicon in molten iron higher than 0.20% time, dephosphorization efficiency can be subject to larger impact and restriction.For improving dephosphorization efficiency, first tackling molten iron and carrying out pre-desiliconizing process.
Desiliconization of hot metal technique adopts the element silicon added in oxygenant and molten iron react and produce Si0
2principle reach and reduce the object of molten iron silicon content.Conventional oxygenant has gas (oxygen or air) and solid (ferric oxide, agglomerate, fine iron breeze, iron ore etc.) oxygenant.In normal conditions, use gas desiliconization agent compared with solid desiliconization agent, its reaction is more easily carried out.In addition owing to having Si0 in desilication reaction product
2, so add the basic oxide such as certain Ca0 in solid desiliconization agent, Si0 in slag can be reduced
2activity value, thus the carrying out being conducive to the short desilication reaction that spouts.
Desiliconization method etc. of dusting is thrown in spreading agent desiliconization, metal mixer car or hot metal ladle when gas stirring or top injecting desiliconization, metal mixer car or hot metal mixer tap a blast furnace before conventional desiliconization of hot metal pretreatment process comprises State of Blast Furnace.When the advantage of these desiliconization of hot metal pretreatment processs is desilication reactions, the utilization ratio of oxygen is high, after process, molten iron silicon content is stablized, but has that desiliconization process holding time is long, treating processes temperature loss is large, facility investment is large and maintenance cost is high and the shortcoming such as complicated operation.
Summary of the invention
The object of this invention is to provide a kind of desiliconization of hot metal agent, throw and spread device and the pretreated method of desiliconization of hot metal, for hot metal in steelmaking desiliconization pretreatment technology.
The technical solution used in the present invention is:
A kind of desiliconization of hot metal agent, the composition by weight percent of this desiliconization agent is: iron scale: 75 ~ 80%, lime powder: 12 ~ 15%, Fluorspar Powder: 5 ~ 8%, and the granularity of desiliconization agent is 2 ~ 5mm.
Described iron scale is the rolling iron scale waste material that smelter produces in Rolling production process.
The device of desiliconization agent is spread in a kind of throwing, for throwing the desiliconization of hot metal agent sprinkling and state, it comprises support, is arranged on the material bin of cradle top, the opening for feed at described material bin top is connected with the discharge port of material storer, the top of described material bin is provided with LOAD CELLS, be provided with vibratory feeder below the discharge port of described material bin, described vibratory feeder is installed on the bracket, and the discharge port of described vibratory feeder is provided with bleeder valve and swing type hopper.
A kind of pretreated method of desiliconization of hot metal, the device that present method utilizes above-mentioned throwing to spread desiliconization of hot metal agent is thrown and is spread described desiliconization of hot metal agent, and carried out the pre-treatment of desiliconization of hot metal, it comprises the following steps:
Step one, the described material storer being loaded with desiliconization of hot metal agent is lifted on the top of described material bin, desiliconization of hot metal agent enters material bin by described material storer, and described LOAD CELLS is accurately weighed to desiliconization of hot metal agent;
Step 2, will the device spreading desiliconization of hot metal agent be thrown be positioned over the side of blast furnace iron outlet groove, and make the discharge end of described swing type hopper be positioned at the top of blast furnace iron outlet groove;
Step 3, when blast furnace casting, open described bleeder valve and described vibratory feeder, described swing type hopper by desiliconization of hot metal agent accurately, uniform throwing spread in blast furnace iron outlet groove, desiliconization of hot metal agent carries out desilication reaction with the interior molten iron flowed of blast furnace iron outlet groove.
Further improve as of the present invention, in described step one, the usage quantity of desiliconization agent is add described desiliconization of hot metal agent 20 ~ 30 Kg in molten iron per ton.
Desiliconization of hot metal technique adopts the element silicon in the solid oxide iron sheet oxygenant and molten iron added react and produce Si0
2principle reach and reduce the object of molten iron silicon content.Owing to having Si0 in desilication reaction product
2, so add a certain amount of lime in solid desiliconization agent, by Ca0 and Si0
2reaction forming reactions slag, can reduce Si0 in slag
2activity value, thus the carrying out being conducive to the short desilication reaction that spouts.In desiliconization agent, add appropriate fluorite, reaction production slag can be reduced and obtain fusing point, improve slag mobility, improve reaction efficiency.Desiliconization agent particle is excessive, and it can not melt completely, is unfavorable for that sufficient reacting carries out; Desiliconization agent particle is too small, and it can not mix completely with molten iron, and utilization ratio is low.Therefore desiliconization agent particle size is selected at 2 ~ 5mm.
In the present invention, the LOAD CELLS arranged at the top of material bin can need to throw the weight of spreading material by precise, the vibratory feeder arranged bottom material bin has makes material evenly throw in, and to the material of conglomeration, there is loose effect of shaking, the discharge port of swing type hopper is placed in the top of blast furnace iron outlet groove, and what material was shed is more even.Use the present invention to throw and spread material, effectively alleviate the labour intensity of operating personnel.
The present invention is using iron-smelting blast furnace tapping duration as the desilication reaction treatment time, utilize the flowing potential energy of molten iron in blast-melted ditch to reach desiliconization of hot metal pre-treatment object with throwing to spread to react into the desiliconization material agent in trough, will the time controling of desiliconization agent be added in 5 ~ 10 minutes according to the blast furnace casting time.Have facility investment few, simple to operate, additionally do not take the process time, processing power is large, the advantages such as hot metal temperature drop is few, and slag sluicing system is good, can be applicable to the desiliconization of hot metal pretreatment technology needed for steel-making.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure: 1, material storer, 2, LOAD CELLS, 3, material bin, 4, support, 5, bleeder valve, 6, vibratory feeder, 7, swing type hopper.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Embodiment 1
A kind of desiliconization of hot metal agent, the composition by weight percent of this desiliconization agent is: iron scale (the rolling iron scale waste material produced in Rolling production process): 75 ~ 80%, lime powder: 12 ~ 15%, Fluorspar Powder: 5 ~ 8%, the granularity 2 ~ 5mm of this desiliconization agent.
A kind of material is as shown in Figure 1 thrown and is spread device, it comprises support 4, is arranged on the material bin 3 at support 4 top, it is characterized in that: the opening for feed at material bin 3 top is connected with the discharge port of material storer 1, the top of material bin 3 is provided with LOAD CELLS 2, and the discharge outlet of material bin 3 is provided with bleeder valve 5.Be provided with vibratory feeder 6 below the discharge port of material bin 3, vibratory feeder 6 is arranged on support 4, and the discharge port of vibratory feeder 6 is provided with swing type hopper 7.
A kind of pretreated method of desiliconization of hot metal, the device that present method utilizes above-mentioned throwing to spread desiliconization of hot metal agent is thrown and is spread described desiliconization of hot metal agent, and carried out the pre-treatment of desiliconization of hot metal, it comprises the following steps:
Step one, the material storer 1 being loaded with desiliconization of hot metal agent is lifted on the top of material bin 3, desiliconization of hot metal agent enters material bin 3 by material storer 1, and LOAD CELLS 2 pairs of desiliconization of hot metal agent are accurately weighed;
Step 2, will the device spreading desiliconization of hot metal agent be thrown be positioned over the side of blast furnace iron outlet groove, and make the discharge end of swing type hopper 7 be positioned at the top of blast furnace iron outlet groove;
Step 3, when blast furnace casting, open bleeder valve 5 and vibratory feeder 6, swing type hopper 7 by desiliconization of hot metal agent accurately, uniform throwing spread in blast furnace iron outlet groove, desiliconization of hot metal agent carries out desilication reaction with the interior molten iron flowed of blast furnace iron outlet groove.
In step one, the usage quantity of desiliconization agent is add desiliconization of hot metal agent 20 ~ 30 Kg in molten iron per ton.
When molten iron temperature more than 1400 DEG C, the weight percent content of initial silicon be 0.35 ~ 0.40% time, carry out throwing in blast furnace iron outlet groove when spreading the pre-treatment of desiliconization agent desiliconization of hot metal, when the consumption of desiliconization agent/molten iron is 25Kg/t, iron scale utilization ratio is the highest, can 50% be reached, now desiliconization rate is 50 ~ 60%, and after desiliconization process, molten iron temperature is more than 1340 DEG C, can meet the processing requirement of next step dephosphorization.
Claims (5)
1. a desiliconization of hot metal agent, is characterized in that: the composition by weight percent of this desiliconization agent is:
Iron scale: 75-80%, lime powder: 12-15%, Fluorspar Powder: 5-8%, the granularity 2-5mm of this desiliconization agent.
2. the device of desiliconization agent is spread in a throwing, desiliconization of hot metal agent according to claim 1 is spread for throwing, it comprises support (4), be arranged on the material bin (3) at support (4) top, it is characterized in that: the opening for feed at described material bin (3) top is connected with the discharge port of material storer (1), the top of described material bin (3) is provided with LOAD CELLS (2), vibratory feeder (6) is provided with below the discharge port of described material bin (3), described vibratory feeder (6) is arranged on described support (4), the discharge port of described vibratory feeder (6) is provided with swing type hopper (7).
3. the device of desiliconization of hot metal agent is spread in throwing according to claim 2, it is characterized in that: the discharge outlet of described material bin (3) is provided with bleeder valve (5).
4. the pretreated method of desiliconization of hot metal, the device that present method utilizes throwing according to claim 2 to spread desiliconization of hot metal agent is thrown and is spread desiliconization of hot metal agent according to claim 1, carry out the pre-treatment of desiliconization of hot metal, it is characterized in that: it has comprised the following steps:
Step one, the described material storer (1) being loaded with desiliconization of hot metal agent is lifted on the top of described material bin (3), desiliconization of hot metal agent enters material bin (3) by described material storer (1), and described LOAD CELLS (2) is accurately weighed to desiliconization of hot metal agent;
Step 2, will the device spreading desiliconization of hot metal agent be thrown be positioned over the side of blast furnace iron outlet groove, and make the discharge end of described swing type hopper (7) be positioned at the top of blast furnace iron outlet groove;
Step 3, when blast furnace casting, open described bleeder valve (5) and described vibratory feeder (6), desiliconization of hot metal agent is thrown and is spread in blast furnace iron outlet groove by described swing type hopper (7) accurately, uniformly, and desiliconization of hot metal agent and the interior molten iron flowed of blast furnace iron outlet groove carry out desilication reaction.
5. the pretreated method of desiliconization of hot metal according to claim 4, is characterized in that: need in molten iron per ton in described step one to add described desiliconization of hot metal agent 20 ~ 30 Kg.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928430A (en) * | 2015-05-22 | 2015-09-23 | 江苏嘉耐高温材料有限公司 | Feeding machine for pre-dephosphorizing molten iron of iron-accumulated iron runner, and pre-dephosphorizing method of feeding machine |
| CN108220529A (en) * | 2016-12-13 | 2018-06-29 | 鞍钢股份有限公司 | Molten iron desiliconization agent using sintering machine head electric dedusting ash as base body |
| CN108384915A (en) * | 2018-03-07 | 2018-08-10 | 首钢集团有限公司 | A kind of removing titanium in molten iron method before State of Blast Furnace |
| CN109647588A (en) * | 2019-01-12 | 2019-04-19 | 明拓集团铬业科技有限公司 | A kind of ball mill weighing feed formula marble feeding device |
| CN115595393A (en) * | 2022-10-08 | 2023-01-13 | 阳春新钢铁有限责任公司（Cn） | Device and method for melting iron-containing materials in main iron runner of blast furnace |
Citations (2)
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| JPS61147806A (en) * | 1984-12-19 | 1986-07-05 | Nippon Steel Corp | Desiliconizing method of molten iron |
| CN102888483A (en) * | 2012-09-19 | 2013-01-23 | 钢铁研究总院 | Method for desilicating molten iron by stirring |
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2014
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Patent Citations (2)
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| JPS61147806A (en) * | 1984-12-19 | 1986-07-05 | Nippon Steel Corp | Desiliconizing method of molten iron |
| CN102888483A (en) * | 2012-09-19 | 2013-01-23 | 钢铁研究总院 | Method for desilicating molten iron by stirring |
Non-Patent Citations (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104928430A (en) * | 2015-05-22 | 2015-09-23 | 江苏嘉耐高温材料有限公司 | Feeding machine for pre-dephosphorizing molten iron of iron-accumulated iron runner, and pre-dephosphorizing method of feeding machine |
| CN108220529A (en) * | 2016-12-13 | 2018-06-29 | 鞍钢股份有限公司 | Molten iron desiliconization agent using sintering machine head electric dedusting ash as base body |
| CN108384915A (en) * | 2018-03-07 | 2018-08-10 | 首钢集团有限公司 | A kind of removing titanium in molten iron method before State of Blast Furnace |
| CN109647588A (en) * | 2019-01-12 | 2019-04-19 | 明拓集团铬业科技有限公司 | A kind of ball mill weighing feed formula marble feeding device |
| CN115595393A (en) * | 2022-10-08 | 2023-01-13 | 阳春新钢铁有限责任公司（Cn） | Device and method for melting iron-containing materials in main iron runner of blast furnace |
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