CN103243197A - Novel direct continuous casting slag washing mixed material and preparation process thereof - Google Patents
Novel direct continuous casting slag washing mixed material and preparation process thereof Download PDFInfo
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- CN103243197A CN103243197A CN2013101745500A CN201310174550A CN103243197A CN 103243197 A CN103243197 A CN 103243197A CN 2013101745500 A CN2013101745500 A CN 2013101745500A CN 201310174550 A CN201310174550 A CN 201310174550A CN 103243197 A CN103243197 A CN 103243197A
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Abstract
The invention relates to a novel direct continuous casting slag washing mixed material and a preparation process thereof, and belongs to the field of special-performance alloy and powder metallurgy novel material in metal materials of the novel materials. The novel heating slag washing mixed material comprises the following components in parts by weight: 30-65 parts of aluminum oxide powder, 30-50 parts of quick lime, 1-6 parts of magnesium oxide powder, 0-6 parts of fluorite and 5-6 parts of silicon dioxide powder. The preparation process of the novel heating slag washing mixed material comprises the following steps of: ball-milling the materials in a ball mill to obtain particle powder; press-moulding the ball-milled particle powder by a ball press, smelting in an electric-arc furnace; and adding 5-40 parts of aluminum powder to the molten liquid during a turning down process, and crushing the cooled material into particles. The novel direct continuous casting slag washing mixed material disclosed by the invention can be used for filtering deoxidized desulfurized molten steel very well, so that produced deoxidation products can be caught effectively and modification of impurities in the steel is promoted, so that the purpose of evolving the molten steel is reached.
Description
Technical field
The present invention relates to a kind of novel straight wash heat mixing material and preparation technology thereof of going up, belong to the property alloy in the metallic substance and powder metallurgy field of new in the novel material.
Background technology
The steel production in China sustainable development, output of steel increases, rolling shapes and quality approach or reach advanced world standards, and converter steelmaking is still Chinese topmost method for making steel at present, converter steelmaking output is from 1.21 hundred million tons of 5.4 hundred million tons of rising to 2008 in 1998, the converter steelmaking ratio then from 1998 about 80% rise to present about 90%.Casting technique has also had significant progress, kind and the output of continuous casting steel constantly increase, continuous casting ratio from 1998 68.8% be increased to 2008 about 98.86%, raising along with continuous casting ratio, lumber recovery also increases substantially, for China's Iron And Steel Industry increases production and improves productivity, important contribution has been made in energy-saving and emission-reduction.
In China's Iron And Steel Industry, major part is medium and small converter iron and steel enterprise, and the casting mode is basically based on continuous casting, and part iron enterprise does not have refining unit, though and refining unit has been gone up by some enterprise but the affinability deficiency causes some steel grade directly not enter continuous casting working procedure by refining.At the present situation of present Iron and Steel Enterprises in China, study and explore a not only only refining but also can smelt the low cost process route of qualified variety steel, producer not enough for those affinabilities or that can't cross refining provides a kind of brand-new thinking.
Summary of the invention
The objective of the invention is for solving the problems of the technologies described above, propose a kind of novel straight wash heat mixing material and preparation technology thereof of going up.
To achieve these goals, the present invention adopts following technical scheme:
A kind of novel straight wash heat mixing material of going up, it is characterized in that, component by following parts by weight constitutes: 30～65 parts of alumina powders, 30～50 parts of unslaked limes, 1～6 part of magnesium oxide powder, 0～6 part in fluorite, 5～6 parts of SiO 2 powders, place the ball mill ball milling to obtain fine-particle powder respectively above-mentioned materials, again with the fine-particle powder behind the ball milling after ball press compression moulding, send into fusion in the electric arc furnace, in the process of falling the stove, aluminium powder is added in the liquation for 5～40 parts at last, cooled material fragmentation to particle is got final product.
Its step of preparation process is as follows:
(1) ball milling: weigh aluminium powder, alumina powder, unslaked lime, SiO 2 powder, the magnesium oxide powder of getting aforementioned proportion in the balance, be respectively charged in the ball grinder, ball milling 20h on the roller ball grinding machine, rotating speed is 1000r/min, obtains a micron powder;
(2) oven dry: with the slurry that step 1 roller ball mill obtains, to put into vacuum drying oven and carry out vacuum-drying, its vacuum tightness is 0～-0.35Pa, and drying temperature control is at 35～100 ℃, and the time is 20～54h;
(3) mix: the dried micron powder with step 2 obtains, except aluminium powder, take by weighing each component raw material by the predetermined weight proportioning, place high-speed mixer evenly to mix 5-15min then;
(4) again with mixed micron powder of step 3 after ball press compression moulding, send into fusion in the electric arc furnace, in the process of falling the stove, 5～40 parts of aluminium powders are added in the liquation at last, with the particle of cooled material fragmentation to the specialized range.
Described unslaked lime is selected new fresh lime for use, satisfies superfine or the primary standard of YB/T04293 standard code.
Described aluminium powder adopt useless assorted aluminium ash through broken, melt and three operations of spraying after, as the straight metallic aluminium powder of going up the wash heat material.
Described micron powder diameter is 1～5mm.
The described ball mill ball milling time is 20h, and rotating speed is 1000r/min.
Adopt technique scheme only refining can smelt the low cost process route of qualified variety steel, a kind of novel straight wash heat mixing material of going up of proposition, compared with prior art, its technique effect is:
(1) novelly straight go up the wash heat material to possess burn-off rate fast, modest viscosity, good fluidity, the dross inclusion adsorption ability is strong, and slagging speed is fast.
(2) novel straight going up in the wash heat material contained activeconstituents, the S in the molten steel stably can be controlled within claimed range.
(3) utilize the straight exothermic material of going up in the wash heat material can compensate the temperature drop of molten steel in the wash heat process.
(4) use the straight wash heat material of going up to smelt special steel grade, refining period making foamed slag can realize the submerged arc refining, forming white slag fast can effectively shorten the heat, and enhances productivity.
(5) for the steel grade of refinery practice only, the novel straight wash heat material of going up can be realized making white slag fast, has and strengthens deoxidation, sweetening effectiveness preferably, reduces temperature drop speed.
(6) the novel straight wash heat material of going up can improve the slag composition, is conducive to the absorption of slag deoxidation, desulfurization, inclusion, purifying of steel.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
The novel straight wash heat mixing material of going up of present embodiment is made of the component of following parts by weight: 5 parts of aluminium powders, 65 parts of alumina powders, 20 parts of unslaked limes, 6 parts of SiO 2 powders, 4 parts of magnesium oxide powders.
Its preparation technology comprises the steps:
(1) ball milling: weigh aluminium powder, alumina powder, unslaked lime, SiO 2 powder, the magnesium oxide powder of getting aforementioned proportion in the balance, be respectively charged in the ball grinder, ball milling 20h on the roller ball grinding machine, rotating speed is 1000r/min, obtains a micron powder;
(2) oven dry: with the slurry that step 1 roller ball mill obtains, to put into vacuum drying oven and carry out vacuum-drying, its vacuum tightness is 0～-0.35Pa, and drying temperature control is at 35～100 ℃, and the time is 20～54h;
(3) mix: the dried micron powder with step 2 obtains, except aluminium powder, take by weighing each component raw material by the predetermined weight proportioning, place high-speed mixer evenly to mix 5-15min then;
(4) again with mixed micron powder of step 3 after ball press compression moulding, send into fusion in the electric arc furnace, in the process of falling the stove, 5～40 parts of aluminium powders are added in the liquation at last, with the particle of cooled material fragmentation to the specialized range.
The present invention is dried and is used high yield and saving energy flyash dryer model to be the XH type.The present invention mixes and uses the high-speed mixer model to be the BL-SRL type.
Embodiment 2
The novel straight wash heat mixing material of going up of present embodiment is made of the component of following parts by weight: 15 parts of aluminium powders, 55 parts of alumina powders, 20 parts of unslaked limes, 6 parts of SiO 2 powders, 4 parts of magnesium oxide powders.Its preparation technology is with embodiment 1.
Embodiment 3
The novel straight wash heat mixing material of going up of present embodiment is made of the component of following parts by weight: 25 parts of aluminium powders, 45 parts of alumina powders, 20 parts of unslaked limes, 6 parts of SiO 2 powders, 4 parts of magnesium oxide powders.Its preparation technology is with embodiment 1.
Embodiment 4
The novel straight wash heat mixing material of going up of present embodiment is made of the component of following parts by weight: 35 parts of aluminium powders, 35 parts of alumina powders, 20 parts of unslaked limes, 6 parts of SiO 2 powders, 4 parts of magnesium oxide powders.Its preparation technology is with embodiment 1.
Embodiment 5
The novel straight wash heat mixing material of going up of present embodiment is made of the component of following parts by weight: 40 parts of aluminium powders, 30 parts of alumina powders, 20 parts of unslaked limes, 6 parts of SiO 2 powders, 4 parts of magnesium oxide powders.Its preparation technology is with embodiment 1.
Claims (7)
1. novel straight wash heat mixing material of going up, it is characterized in that, component by following parts by weight constitutes: 30～65 parts of alumina powders, 30～50 parts of unslaked limes, 1～6 part of magnesium oxide powder, 0～6 part in fluorite, 5～6 parts of SiO 2 powders, place ball mill to be total to ball milling above-mentioned materials and get fine-particle powder, again with the fine-particle powder behind the ball milling after ball press compression moulding, send into fusion in the electric arc furnace, in the process of falling the stove, aluminium powder is added in the liquation for 5～40 parts at last, cooled material fragmentation to particle is got final product.
2. the novel straight preparation technology who goes up the wash heat mixing material as claimed in claim 1 is:
(1) ball milling: weigh aluminium powder, alumina powder, unslaked lime, SiO 2 powder, the magnesium oxide powder of getting aforementioned proportion in the balance, be respectively charged in the ball grinder, ball milling 20h on the roller ball grinding machine, rotating speed is 1000r/min, obtains a micron powder;
(2) oven dry: with the slurry that step 1 roller ball mill obtains, to put into vacuum drying oven and carry out vacuum-drying, its vacuum tightness is 0～-0.35Pa, and drying temperature control is at 35～100 ℃, and the time is 20～54h;
(3) mix: the dried micron powder with step 2 obtains, except aluminium powder, take by weighing each component raw material by the predetermined weight proportioning, place high-speed mixer evenly to mix 5-15min then;
(4) again with mixed micron powder of step 3 after ball press compression moulding, send into fusion in the electric arc furnace, in the process of falling the stove, 5～40 parts of aluminium powders are added in the liquation at last, cooled material fragmentation to the particle in the specialized range is got final product.
3. the novel straight wash heat mixing material of going up according to claim 1, it is characterized in that: described unslaked lime is selected new fresh lime for use, satisfies superfine or the primary standard of YB/T04293 standard code.
4. the novel straight wash heat mixing material of going up according to claim 1 is characterized in that: described aluminium powder adopt useless assorted aluminium ash through broken, melt and three operations of spraying after, as the straight metallic aluminium powder of going up the wash heat material.
5. the novel straight wash heat mixing material of going up according to claim 1, it is characterized in that: described micron powder diameter is 1～5mm.
6. the novel straight wash heat mixing material of going up according to claim 1, it is characterized in that: the described ball mill ball milling time is 20h, rotating speed is 1000r/min.
7. the novel straight wash heat mixing material of going up according to claim 1, it is characterized in that: the even mixing time of described high-speed mixer is 5-15min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107739776A (en) * | 2017-09-20 | 2018-02-27 | 刘继唐 | Calcium aluminium composite deoxidant |
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| CN1286312A (en) * | 2000-04-29 | 2001-03-07 | 幸超 | Slag modifier for refining molten steel |
| CN101497934A (en) * | 2009-03-12 | 2009-08-05 | 浙江杭美炉料制造有限公司 | Heating slag washing material for converter steel melting, preparation and use method thereof |
| CN101503747A (en) * | 2009-03-12 | 2009-08-12 | 浙江杭美炉料制造有限公司 | Heating steel slag washing material for converter steel melting, preparation and use method |
| CN101984088A (en) * | 2010-11-16 | 2011-03-09 | 东北大学 | Method for preparing premelted refining slag by using converter slag and aluminum slag |
| CN102071279A (en) * | 2010-12-21 | 2011-05-25 | 沈阳东大材料先进制备技术工程研究中心 | Slag washing material for converter process production aluminum killed steel and preparation method thereof |
| CN102586544A (en) * | 2012-03-20 | 2012-07-18 | 西峡县恒基冶材有限公司 | High-calcium pre-molten slag modification aluminium slag ball and preparation method thereof |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1201072A (en) * | 1998-04-07 | 1998-12-09 | 幸超 | Aluminium-contained premelting slag and preparation method therefor, and molten steel desulfurizer and purifier containing same |
| CN1286312A (en) * | 2000-04-29 | 2001-03-07 | 幸超 | Slag modifier for refining molten steel |
| CN101497934A (en) * | 2009-03-12 | 2009-08-05 | 浙江杭美炉料制造有限公司 | Heating slag washing material for converter steel melting, preparation and use method thereof |
| CN101503747A (en) * | 2009-03-12 | 2009-08-12 | 浙江杭美炉料制造有限公司 | Heating steel slag washing material for converter steel melting, preparation and use method |
| CN101984088A (en) * | 2010-11-16 | 2011-03-09 | 东北大学 | Method for preparing premelted refining slag by using converter slag and aluminum slag |
| CN102071279A (en) * | 2010-12-21 | 2011-05-25 | 沈阳东大材料先进制备技术工程研究中心 | Slag washing material for converter process production aluminum killed steel and preparation method thereof |
| CN102586544A (en) * | 2012-03-20 | 2012-07-18 | 西峡县恒基冶材有限公司 | High-calcium pre-molten slag modification aluminium slag ball and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107739776A (en) * | 2017-09-20 | 2018-02-27 | 刘继唐 | Calcium aluminium composite deoxidant |
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