CN1210414C - Binary deactivated blown non-metal powder and its prepn - Google Patents
Binary deactivated blown non-metal powder and its prepn Download PDFInfo
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- CN1210414C CN1210414C CN 01113919 CN01113919A CN1210414C CN 1210414 C CN1210414 C CN 1210414C CN 01113919 CN01113919 CN 01113919 CN 01113919 A CN01113919 A CN 01113919A CN 1210414 C CN1210414 C CN 1210414C
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Abstract
The present invention relates to a blowing powder for deoxidizing and desulfurizing ladles and a making method thereof. When molten steel is refined with metal powder such as calcium silicon powder, etc., the production cost of steel is obviously increased, which is unfavorable for competition. In the present invention, lime powder and calcium carbide powder are mixed and passivated, so that the deoxidizing rate and the desulfurizing rate are obviously enhanced and the cost of the blowing powder can be greatly reduced.
Description
The present invention is the preparation method that blowing powder is used in a kind of ladle deoxidation, desulfurization.
As is well known, it is concise to utilize metal pulvis such as Si-Ca (silico-calcium) powder, Fe-Si (iron silicon) powder, Al (aluminium) powder to carry out molten steel, and the effect of its deoxidation, desulfurization can reach 30-45%.But use the metal pulvis that two big deficiencies are arranged, the one, cost an arm and a leg, the commercial price of common metal pulvis is all more than 10,000 yuan/ton, and a large amount of uses will significantly increase the production cost of steel, unfavorable competition.The 2nd, along with domestic continuous increase for high-quality Clean Steel demand, (O), the control of (S) content is strict more in the steel.Utilize metal pulvis deoxidization desulfuration, the rate of dispeling of 30-45% can not satisfy production requirement.If the deoxidization desulfuration rate of still using the metal pulvis further to improve molten steel just must increase the winding-up amount of ton comminuted steel shot agent, so not only increased cost, simultaneously also prolonged tap to tap time, not only reduced the operating efficiency of STEELMAKING PRODUCTION, but also be difficult to receive the metallurgical effect of anticipation.
The objective of the invention is to develop and to produce impurity such as a kind of manufacturing cost is lower than existing metal pulvis cost, oxygen, sulphur and dispel the high novel pulvis of rate.Still utilize original blowing device during use, can reach metallurgical effect preferably.
(main component is CaC to lime powder (main component is CaO) with calcium carbide powder
2And CaO) all is the non-metal powder agent, use all can obtain good strong desulfurization, deoxidation effect separately, but because these two kinds of pulvis are all easy and chemical reaction (being general said deliquescence) takes place water (comprising airborne water vapour), reacted powder desulfurization, deoxidation effect sharply descend, even can not use, thereby lime powder and the utilization and extention of calcium carbide powder in STEELMAKING PRODUCTION have been hindered.The present invention adopts the method make the pulvis surface passivation, has solved these two kinds of pulvis deliquescent gordian technique that absorbs water.With lime powder after the passivation and calcium carbide powder, spray into again in the ladle after mixing by a certain percentage, obtained the excellent metallurgical effect.
Theing contents are as follows of specific implementation of the present invention.
1. pulvis and composition thereof:
The invention to apply for the pulvis of protecting be after lime powder and calcium carbide pulvis mix by suitable proportioning again through the nonmetal pulvis of the formed two component system of Passivation Treatment, following general designation " binary deactivated blown non-metal powder ".
Because the demand difference that steel grade is smelted, the proportioning of lime powder and calcium carbide pulvis is with different in the binary deactivated blown non-metal powder.Therefore, use different raw material (lime powder and calcium carbide pulvis) and different proportionings, each component concentration also will be obviously different in the binary deactivated blown non-metal powder.By weight percentage, the one-tenth of binary deactivated blown non-metal powder is grouped into as shown in table 1:
Table 1 binary deactivated blown non-metal powder becomes to be grouped into
| Composition | CaO | CaC 2 | SiO 2 | MgO | P | S | C | Other |
| Weight % | 65.85～ 68.00 | 25.55～ 26.45 | 1.45～ 2.38 | 2.86～ 4.16 | 0.0024≤ | 0.06≤ | 0.36≤ | 1.63≤ |
The binary deactivated blown non-metal powder granularity is :≤1.00mm.Concrete size-grade distribution is as shown in table 2:
Table 2 binary deactivated blown non-metal powder size-grade distribution table
| Granularity mm | ≤1.0 | ≤0.3 | ≤0.15 | ≤0.075 | ≤0.044 |
| Ratio % | 100 | 99.8 | 98.4 | 92.5 | 90 |
2. the manufacture method of binary deactivated blown non-metal powder:
The main raw material of producing binary deactivated blown non-metal powder has three kinds, i.e. lime powder, calcium carbide pulvis and passivator.Wherein employed lime powder and calcium carbide pulvis composition by weight percentage, respectively shown in table 3 and table 4.
The chemical ingredients of table 3 lime powder
| Composition | CaO | SiO 2 | MgO | P | S | Other |
| Content % | 89.05～92.00 | ≤2.5 | ≤6.5 | ≤0.005 | ≤0.10 | ≤1.85 |
The chemical ingredients of table 4 calcium carbide pulvis
| Composition | CaC 2 | CaO | Fe 2O 3 | Al 2O 3 | MgO | SiO 2 | C |
| Content % | ≥85 | ≤9.5 | ≤1.45 | ≤0.35 | ≤2.1 | ≤1.2 | |
The size-grade distribution of lime powder and calcium carbide pulvis is as shown in table 5.
Table 5 lime powder and calcium carbide pulvis size-grade distribution table
| Granularity mm | ≤1.0 | ≤0.3 | ≤0.15 | ≤0.075 | ≤0.044 |
| Ratio % | 100 | 99.8 | 98.4 | 92.5 | 90 |
The passivator that the present invention uses is organosilicon polymer.This polymkeric substance is a linear structure oily matter, is formed through hydrolytie polycondensation by two senses and simple function organosilane monomer.Its physicals is as follows:
Colourless, tasteless, non-toxic aq, viscosity are below 25 ℃ 1.0 * 10
-3PaS, density 7.2-8.0, water insoluble, not volatile, heat-resisting (43 ℃) have good insulation performance, little surface tension, burning-point is 155 ℃.
The concrete grammar of making is:
With lime powder (granularity≤1.00mm) and calcium carbide pulvis (and granularity≤1.0mm) is packed into by the part by weight of the required two kinds of raw materials of STEELMAKING PRODUCTION in the rotatory sealed vessel, by 0.8-0.9 kg/ton pulvis usage quantity add passivator, temperature is controlled at 30 ℃ ± 2 ℃ and carries out the thorough mixing passivation.Make ladle winding-up deoxidation, desulfurization binary deactivated blown non-metal powder.
In sum, this invention is created belongs to a kind of ladle deoxidation, desulfurization blowing powder, and this kind pulvis not only contains lime powder, but also contains the calcium carbide pulvis.The concrete one-tenth of blowing powder is grouped into as shown in table 6
Table 6 binary deactivated blown non-metal powder becomes to be grouped into table
| Composition | CaO | CaC 2 | SiO 2 | MgO | P | S | C | Other |
| Weight % | 65.85～ 68.00 | 25.55～ 26.45 | 1.45～ 2.38 | 2.86～ 4.16 | 0.0024≤ | 0.06≤ | 0.36≤ | 1.63≤ |
The granularity of blowing powder is :≤1.00mm.Concrete size-grade distribution is as shown in table 7:
Table 7 binary deactivated blown non-metal powder size-grade distribution table
| Granularity mm | ≤1.0 | ≤0.3 | ≤0.15 | ≤0.075 | ≤0.044 |
| Ratio % | 100 | 99.8 | 98.4 | 92.5 | 90 |
This invention also comprises a kind of ladle deoxidation, the desulfurization making method of blowing powder, the pulvis that this kind method makes is a raw material with lime powder and calcium carbide pulvis, by putting into encloses container after 7: 3 the part by weight preparation, additional proportion is the passivator (organosilicon polymer) of pulvis 0.8-0.9 kilogram per ton, and under 30 ℃ ± 2 ℃ temperature thorough mixing.
As this invention embodiment: the composition of the binary deactivated blown non-metal powder of being produced is as shown in table 8.
Table 8 binary deactivated blown non-metal powder becomes to be grouped into example
| Composition | CaO | CaC 2 | SiO 2 | MgO | P | S | C | Other |
| Weight % | 65.85 | 25.55 | 2.38 | 4.16 | 0.0022 | 0.06 | 0.36 | 1.63 |
The shared ratio of calcium carbide pulvis is 30% of a pulvis gross weight in the above-mentioned binary deactivated blown non-metal powder, and the additional proportion of passivator is 0.8 kilogram per ton, under 30 ℃ the temperature in encloses container thorough mixing.
This invention obtains to implement product and uses in factory, has obtained well-content effect.Use with Benxi Iron and Steel Company to be example, its desulfurization degree reaches more than 80%, gas content (H)≤1ppm, (N)≤35ppm, (O)≤6ppm.
The binary deactivated blown non-metal powder that this invention realized is a main raw material with lime powder and calcium carbide pulvis, carry out the product that makes after the Passivation Treatment, can guarantee not deliquescence of long storage, spray into deoxidation simultaneously, desulfurization again in the ladle simultaneously aborning, and metallurgical effect is remarkable
Production technique is simple, and cost reduces greatly than the metal pulvis, has good production utility value.
Claims (2)
1. a ladle deoxidation, desulfurization are with the making method of blowing powder, it is characterized in that this kind pulvis is a raw material with lime powder and calcium carbide pulvis, by putting into encloses container after the suitable weight ratio preparation, adding by two senses and simple function organosilane monomer through hydrolytie polycondensation and the passivator that constitutes for linear structure buttery organosilicon polymer, at 30 ℃ ± 2 ℃ thorough mixing, the additional proportion of passivator is a pulvis 0.8-0.9 kilogram per ton.
2. according to the said blowing powder making method of claim 1, it is characterized in that the proportioning ratio of said lime powder and calcium carbide pulvis is 7: 3 by weight in the method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01113919 CN1210414C (en) | 2001-04-30 | 2001-04-30 | Binary deactivated blown non-metal powder and its prepn |
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| CN 01113919 CN1210414C (en) | 2001-04-30 | 2001-04-30 | Binary deactivated blown non-metal powder and its prepn |
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| CN1384213A CN1384213A (en) | 2002-12-11 |
| CN1210414C true CN1210414C (en) | 2005-07-13 |
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| CN1332041C (en) * | 2005-10-05 | 2007-08-15 | 鞍山科技大学 | Water-repellancy high-alkalinity steel-making out-furnace refining slag production method |
| CN100392113C (en) * | 2006-01-15 | 2008-06-04 | 刘玉满 | Strengthening, increasing temp., sulphur and phosphorus removing composite powder spraying agent for interal cupola iron melt |
| CN100535133C (en) * | 2006-12-30 | 2009-09-02 | 李继宗 | Steel making lime additive and its production process |
| CN104073596B (en) * | 2014-06-27 | 2016-03-02 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of cored-wire and the titanium alloyed method of molten steel |
| CN104073592B (en) * | 2014-06-27 | 2016-05-18 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of core-spun yarn and the titanium alloyed method of molten steel |
| CN104087716B (en) * | 2014-06-27 | 2016-07-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of core-spun yarn and the titanium alloyed method of molten steel |
| CN108950124A (en) * | 2018-07-23 | 2018-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for making steel of welding rod steel H08A |
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Address after: 110004 Heping Road, Heping District, Liaoning, Shenyang, Lane No. 11, No. 3 Patentee after: NORTHEASTERN UNIVERSITY METALURGICAL TECHNOLOGY INSTITUTE CO., LTD. Address before: 110004 Heping Road, Heping District, Liaoning, Shenyang, Lane No. 11, No. 3 Patentee before: Inst of Metallurgical Technology, Dongbei Univ, Shenyang |
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