CN106086617B - A kind of preparation process of electromagnetic ore separator silicon steel core - Google Patents
A kind of preparation process of electromagnetic ore separator silicon steel core Download PDFInfo
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- CN106086617B CN106086617B CN201610382312.2A CN201610382312A CN106086617B CN 106086617 B CN106086617 B CN 106086617B CN 201610382312 A CN201610382312 A CN 201610382312A CN 106086617 B CN106086617 B CN 106086617B
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 79
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000005554 pickling Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 17
- 238000005097 cold rolling Methods 0.000 claims abstract description 14
- 238000009749 continuous casting Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000000137 annealing Methods 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 238000005098 hot rolling Methods 0.000 claims abstract description 7
- 238000007670 refining Methods 0.000 claims abstract description 7
- 239000011162 core material Substances 0.000 claims description 34
- 229910052698 phosphorus Inorganic materials 0.000 claims description 23
- 229910052710 silicon Inorganic materials 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- 229910052717 sulfur Inorganic materials 0.000 claims description 18
- 239000012535 impurity Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- 239000004411 aluminium Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 7
- 241001417490 Sillaginidae Species 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 238000005262 decarbonization Methods 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 6
- 230000023556 desulfurization Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000010583 slow cooling Methods 0.000 claims description 6
- 238000009966 trimming Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000007885 magnetic separation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 239000000306 component Substances 0.000 description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- JZQOJFLIJNRDHK-CMDGGOBGSA-N alpha-irone Chemical compound CC1CC=C(C)C(\C=C\C(C)=O)C1(C)C JZQOJFLIJNRDHK-CMDGGOBGSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
Abstract
The invention discloses a kind of preparation processes of electromagnetic ore separator silicon steel core; it is pre-processed including molten steel; in converter to the smelting of silicon steel and external refining silicon steel; by the continuous casting working procedure of temperature and casting speed control suitable for after; then hot rolling, pickling, cold rolling and annealing operation are carried out to the silicon steel strand at manufacture; annealing is using inert gas shielding, and long-time heat preservation is until natural cooling；The present invention passes through the stringent control to its component and process, not only so that the magnetic separation performance of electromagnetic ore separator greatly improves, also so that the silicon steel material prepared has had both good hardness, intensity and electromagnetic performance, it is requirement that it is increasingly required, which to meet silicon steel, the use scope of silicon steel is expanded, solves the use confinement problems that silicon steel in the prior art occurs on hardness, intensity and electromagnetic performance.
Description
Technical field
The present invention relates to electromagnetic ore separator technical field, especially a kind of preparation process of electromagnetic ore separator silicon steel core.
Background technology
Soft iron or silicon steel are commonly used in electromagnetic mechanism as magnetic core component, silicon steel is a kind of Antaciron.It is rolled with silicon steel
The sheet material of system is soft magnetic materials most widely used in electrical field, thus silicon steel sheet is also known as electrical sheet.Silicon steel sheet is widely used in
In motor, generator, transformer, choke coil, electromagnetic mechanism, relay and measuring instrumentss.
The number of silicon steel silicon content directly affects the performance of silicon steel material, is divided into orientation silicon steel and silicon steel core, oriented silicon
The magnetism of steel has strong directionality;There is superior high magnetic permeability and low loss characteristic in the rolling direction of easy magnetization,
The Bs of cold rolled silicon steel magnetic core is higher than orientation silicon steel;Compared with hot rolled silicon steel, thickness is uniform, and dimensional accuracy is high, and surface is smooth flat
It is whole.Silicon is the good deoxidier of steel, it is combined with oxygen, and oxygen is made to be changed into the stable not silica for carbon reduction, is avoided
Make the distortion of lattice of iron due to oxygen atom adulterates.Silicon increases resistivity, while help to have after becoming solid solution in α iron
Evil carbon impurity is separated.Therefore, general impure iron can improve magnetic conductivity after adding in silicon, reduce coercivity and iron loss.But
Silicon content increases and material can be made to be hardened and becomes fragile, and thermal conductivity and toughness decline, unfavorable to radiating and being machined.And current skill
Art field is to the use demand of silicon steel, and not only in its electromagnetically excellent requirement, the use in its hardness and strength will
It asks also higher and higher, therefore the use adaptability and popularity of silicon steel is also needed to be further improved perfect.
Invention content
The goal of the invention of the present invention is：In view of the above problems, a kind of electromagnetic ore separator silicon steel core is provided
Preparation process passes through the stringent control to its component and process so that the silicon steel material of preparation has had both good hardness, strong
Degree and electromagnetic performance, meet the increasingly required use scope for being requirement, expanding silicon steel of silicon steel, solve the prior art
What middle silicon steel occurred on hardness, intensity and electromagnetic performance uses confinement problems.
The technical solution adopted by the present invention is as follows：
A kind of preparation process of electromagnetic ore separator silicon steel core, the component of the silicon steel core material are percentagewised packet
Containing following ingredient：C：0.002 ~ 0.015%, Si:1.50 ~ 3.80%, Mn≤1.50%, P≤0.10%, S≤0.005%, Als：0.06
~ 1.4%, N≤0.002%, Cr：0.01 ~ 0.05%, remaining is Fe and inevitable impurity；The preparation process of the silicon steel core
Include the following steps：
Step 1, molten steel pretreatment, add in calcium carbonate in molten steel, carry out desulfurization to molten steel by mechanical mixing method and take off
The pretreatment processing of phosphorus；
Molten steel is placed in converter or electric furnace and smelts by step 2, smelting silicon steel, in heating process, detects component weight
Measure percentage C：When 0.002 ~ 0.010%, P≤0.10%, S≤0.005%, temperature is at 1660 DEG C at this time；By molten steel converter tapping,
A small amount of aluminium and alloy are added in during converter, pre-deoxidation is carried out to molten steel, then refined in converter to refining furnace, added in appropriate
Decarburizer carry out decarbonization process after, add aluminium powder and be diffused deoxidation step；
Step 3, continuous casting, the molten steel after step 2 is refined carry out continuous casting protective casting on conticaster, and temperature control exists
1120 DEG C ~ 1540 DEG C, pulling rate is maintained at 1.8 ~ 2.2m/min, obtains strand；
The strand that step 3 obtains is sent into heating furnace and is heated to preference temperature by step 4, hot rolling：750 DEG C ~ 900 DEG C, after
Breaking down cogging is carried out, is then delivered on Hot Line and is rolled, enter finishing rolling step through mill table, slab thickness exists at this time
120~150mm；
Step 5, pickling are kept the temperature the slab that step 4 obtains, pickling and normalizing treatment, pickling remove hot rolled strip
Oxide, the defects of to prevent from being cold rolled to product surface, should during slow heating slab to 800 DEG C, keep the temperature to Slow cooling；
Step 6, cold rolling will carry out step 5 treated slab and be sent to cold mill complex to carry out cold-rolling process, by slab
Then thickness control carries out online smooth, trimming and oil surface in 10mm to the slab rolled；
Slab, is heated slowly to 950 DEG C ~ 1100 DEG C by step 7, annealing under nitrogen protection, keeps the temperature 6 ~ 12h, until temperature
Degree, which is cooled to room temperature, comes out of the stove.
Further, the component ratio of the silicon steel core material is preferably：C：0.012%, Si:2.50%, Mn：1.2%, P≤
0.10%, S≤0.005%, Als：0.80%, N≤0.002%, Cr：0.01%, remaining is Fe and inevitable impurity.
Further, the component ratio of the silicon steel core material is preferably：C：0.010%, Si:3.00%, Mn：1.0%, P≤
0.10%, S≤0.005%, Als：1.0%, N≤0.002%, Cr：0.03%, remaining is Fe and inevitable impurity.
Further, the component ratio of the silicon steel core material is preferably C：0.007%, Si:3.50%, Mn：0.6%, P≤
0.10%, S≤0.005%, Als：1.20%, N≤0.002%, Cr：0.03%, remaining is Fe and inevitable impurity.
Due to using above-mentioned preparation process, the content of silicon in silicon steel is promoted to the silicon steel material hardness entirely produced to guarantee
With the component of intensity, continuous casting working procedure temperature and casting speed control adapt to, and ensure that the silicon steel strand flawless, stomata, surface of preparation
Quality is good；Low-temperature heat is conducive to the reduction of the yield tensile ratio of silicon steel and the raising of deep drawability in hot-rolled process, and after passing through
Its surface smoothness is high after continuous cold rolling process, and further improves the deep drawability of silicon steel, electromagnetic performance etc., reduces silicon
The core loss value of steel；The present invention's prepares that silicon steel use scope is wide, avoids the limitation that silicon steel occurs in actual use so that
Electromagnetism ore deposit selects the intensity of machine silicon steel core and electromagnetic performance to greatly improve, and ensure that the excellent magnetic separation rate of electromagnetic separator and magnetic
Select effect.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1st, preparation process is simple, and process cycle is short, improves production efficiency；
2nd, using the silicon steel prepared by the present invention as core material, the electromagnetic separation effect of magnetic separation mechanism is substantially increased
Rate, and separating effect is preferable；
3rd, use limitation of the silicon steel on hardness, intensity and electromagnetic performance is broken through, further perfect silicon steel material
Mechanical performance expands the use scope of silicon steel.
Specific embodiment
With reference to embodiment, the present invention is described in detail.
In order to which the object, technical solution and advantage for making invention are more clearly understood, with reference to embodiments, to the present invention into
Row is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit
The fixed present invention.
Embodiment 1
A kind of preparation process of electromagnetic ore separator silicon steel core, the component of the silicon steel core material are percentagewised packet
Containing following ingredient：C：0.002 ~ 0.015%, Si:1.50 ~ 3.80%, Mn≤1.50%, P≤0.10%, S≤0.005%, Als：0.06
~ 1.4%, N≤0.002%, Cr：0.01 ~ 0.05%, remaining is Fe and inevitable impurity；The preparation process of the silicon steel core
Include the following steps：
Step 1, molten steel pretreatment, add in calcium carbonate in molten steel, carry out desulfurization to molten steel by mechanical mixing method and take off
The pretreatment processing of phosphorus；
Molten steel is placed in converter or electric furnace and smelts by step 2, smelting silicon steel, in heating process, detects component weight
Measure percentage C：When 0.006 ~ 0.012%, P≤0.10%, S≤0.005%, temperature is at 1660 DEG C at this time；By molten steel converter tapping,
A small amount of aluminium and alloy are added in during converter, pre-deoxidation is carried out to molten steel, then refined in converter to refining furnace, added in appropriate
Decarburizer carry out decarbonization process after, add aluminium powder and be diffused deoxidation step；
Step 3, continuous casting, the molten steel after step 2 is refined carry out continuous casting protective casting on conticaster, and temperature control exists
1460 DEG C, pulling rate is maintained at 2.2m/min, obtains strand；
The strand that step 3 obtains is sent into heating furnace and is heated to 800 DEG C by step 4, hot rolling, rear to carry out breaking down cogging, so
After be sent on Hot Line and rolled, enter finishing rolling step through mill table, slab thickness is in 150mm at this time；
Step 5, pickling are kept the temperature the slab that step 4 obtains, pickling and normalizing treatment, pickling remove hot rolled strip
Oxide, the defects of to prevent from being cold rolled to product surface, should during slow heating slab to 800 DEG C, keep the temperature to Slow cooling；
Step 6, cold rolling will carry out step 5 treated slab and be sent to cold mill complex to carry out cold-rolling process, by slab
Then thickness control carries out online smooth, trimming and oil surface in 10mm to the slab rolled；
Slab, is heated slowly to 950 DEG C ~ 1100 DEG C by step 7, annealing under nitrogen protection, keeps the temperature 7.5h, until temperature
It is cooled to room temperature and comes out of the stove.
Embodiment 2
A kind of preparation process of electromagnetic ore separator silicon steel core, the component ratio of the silicon steel core material are preferably：C：
0.012%, Si:2.50%, Mn：1.2%, P≤0.10%, S≤0.005%, Als：0.80%, N≤0.002%, Cr：0.01%, remaining
For Fe and inevitable impurity.The preparation process of the silicon steel core includes the following steps：
Step 1, molten steel pretreatment, add in calcium carbonate in molten steel, carry out desulfurization to molten steel by mechanical mixing method and take off
The pretreatment processing of phosphorus；
Molten steel is placed in converter or electric furnace and smelts by step 2, smelting silicon steel, in heating process, detects component weight
Measure percentage C：When 0.008 ~ 0.015%, P≤0.080%, S≤0.005%, temperature is at 1660 DEG C at this time；By molten steel converter tapping,
A small amount of aluminium and alloy are added in during converter, pre- take off is carried out to molten steel
Then oxygen is refined in converter to refining furnace, after adding in suitable decarburizer progress decarbonization process, add aluminium
Powder is diffused deoxidation step；
Step 3, continuous casting, the molten steel after step 2 is refined carry out continuous casting protective casting on conticaster, and temperature control exists
1540 DEG C, pulling rate is maintained at 2.2m/min, obtains strand；
The strand that step 3 obtains is sent into heating furnace and is heated to 840 DEG C by step 4, hot rolling, rear to carry out breaking down cogging, so
After be sent on Hot Line and rolled, enter finishing rolling step through mill table, slab thickness is in 150mm at this time；
Step 5, pickling are kept the temperature the slab that step 4 obtains, pickling and normalizing treatment, pickling remove hot rolled strip
Oxide, the defects of to prevent from being cold rolled to product surface, should during slow heating slab to 800 DEG C, keep the temperature to Slow cooling；
Step 6, cold rolling will carry out step 5 treated slab and be sent to cold mill complex to carry out cold-rolling process, by slab
Then thickness control carries out online smooth, trimming and oil surface in 10mm to the slab rolled；
Slab, is heated slowly to 950 DEG C ~ 1100 DEG C by step 7, annealing under nitrogen protection, keeps the temperature 9h, until temperature is cold
But it comes out of the stove to room temperature.
Embodiment 3
A kind of preparation process of electromagnetic ore separator silicon steel core, the component ratio of the silicon steel core material are preferably：C：
0.010%, Si:3.00%, Mn：1.0%, P≤0.10%, S≤0.005%, Als：1.0%, N≤0.002%, Cr：0.03%, remaining is
Fe and inevitable impurity.The preparation process of the silicon steel includes the following steps：
Step 1, molten steel pretreatment, add in calcium carbonate in molten steel, carry out desulfurization to molten steel by mechanical mixing method and take off
The pretreatment processing of phosphorus；
Molten steel is placed in converter or electric furnace and smelts by step 2, smelting silicon steel, in heating process, detects component weight
Measure percentage C：When 0.005 ~ 0.012%, P≤0.10%, S≤0.005%, temperature is at 1660 DEG C at this time；By molten steel converter tapping,
A small amount of aluminium and alloy are added in during converter, pre-deoxidation is carried out to molten steel, then refined in converter to refining furnace, added in appropriate
Decarburizer carry out decarbonization process after, add aluminium powder and be diffused deoxidation step；
Step 3, continuous casting, the molten steel after step 2 is refined carry out continuous casting protective casting on conticaster, and temperature control exists
1240 DEG C, pulling rate is maintained at 2.2m/min, obtains strand；
The strand that step 3 obtains is sent into heating furnace and is heated to 870 DEG C by step 4, hot rolling, rear to carry out breaking down cogging, so
After be sent on Hot Line and rolled, enter finishing rolling step through mill table, slab thickness is in 150mm at this time；
Step 5, pickling are kept the temperature the slab that step 4 obtains, pickling and normalizing treatment, pickling remove hot rolled strip
Oxide, the defects of to prevent from being cold rolled to product surface, should during slow heating slab to 800 DEG C, keep the temperature to Slow cooling；
Step 6, cold rolling will carry out step 5 treated slab and be sent to cold mill complex to carry out cold-rolling process, by slab
Then thickness control carries out online smooth, trimming and oil surface in 10mm to the slab rolled；
Slab, is heated slowly to 950 DEG C ~ 1100 DEG C by step 7, annealing under nitrogen protection, keeps the temperature 10h, until temperature
It is cooled to room temperature and comes out of the stove.
Embodiment 4
A kind of preparation process of electromagnetic ore separator silicon steel core, the component ratio of the silicon steel core material is preferably C：
0.007%, Si:3.50%, Mn：0.6%, P≤0.10%, S≤0.005%, Als：1.20%, N≤0.002%, Cr：0.03%, remaining
For Fe and inevitable impurity.The preparation process of the silicon steel includes the following steps：
Step 1, molten steel pretreatment, add in calcium carbonate in molten steel, carry out desulfurization to molten steel by mechanical mixing method and take off
The pretreatment processing of phosphorus；
Molten steel is placed in converter or electric furnace and smelts by step 2, smelting silicon steel, in heating process, detects component weight
Measure percentage C：When 0.005 ~ 0.010%, P≤0.10%, S≤0.005%, temperature is at 1660 DEG C at this time；By molten steel converter tapping,
A small amount of aluminium and alloy are added in during converter, pre-deoxidation is carried out to molten steel, then refined in converter to refining furnace, added in appropriate
Decarburizer carry out decarbonization process after, add aluminium powder and be diffused deoxidation step；
Step 3, continuous casting, the molten steel after step 2 is refined carry out continuous casting protective casting on conticaster, and temperature control exists
1350 DEG C, pulling rate is maintained at 2.2m/min, obtains strand；
The strand that step 3 obtains is sent into heating furnace and is heated to 900 DEG C by step 4, hot rolling, rear to carry out breaking down cogging, so
After be sent on Hot Line and rolled, enter finishing rolling step through mill table, slab thickness is in 150mm at this time；
Step 5, pickling are kept the temperature the slab that step 4 obtains, pickling and normalizing treatment, pickling remove hot rolled strip
Oxide, the defects of to prevent from being cold rolled to product surface, should during slow heating slab to 800 DEG C, keep the temperature to Slow cooling；
Step 6, cold rolling will carry out step 5 treated slab and be sent to cold mill complex to carry out cold-rolling process, by slab
Then thickness control carries out online smooth, trimming and oil surface in 10mm to the slab rolled；
Slab, is heated slowly to 950 DEG C ~ 1100 DEG C by step 7, annealing under nitrogen protection, keeps the temperature 12h, until temperature
It is cooled to room temperature and comes out of the stove.
The silicon steel plate prepared according to above-described embodiment obtains the data such as following table after testing：
As seen from the above table, according to the preparation process of silicon steel of the present invention obtained by silicon steel material, iron loss under
Drop, electromagnetism magnetic induction intensity are handed over greatly, and yield strength can also reach general steel plate required intensity in use；In conclusion
The silicon steel material that the present invention is produced has had both stronger electromagnetic performance while use intensity is met, and silicon steel material is reliable,
It can be as excellent electromagnetic separator core material.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modification made within refreshing and principle is won and is included within protection scope of the present invention.
Claims (4)
1. a kind of preparation process of electromagnetic ore separator silicon steel core, it is characterised in that：The component of the silicon steel core material presses hundred
Divide than calculating comprising following ingredient：C：0.002 ~ 0.015%, Si:1.50 ~ 3.80%, Mn≤1.50%, P≤0.10%, S≤
0.005%, Als：0.06 ~ 1.4%, N≤0.002%, Cr：0.01 ~ 0.05%, remaining is Fe and inevitable impurity；The silicon
The preparation process of steel magnetic core includes the following steps：
Step 1, molten steel pretreatment, add in calcium carbonate in molten steel, and desulfurization and dephosphorization are carried out to molten steel by mechanical mixing method
Pretreatment；
Molten steel is placed in converter or electric furnace and smelts by step 2, smelting silicon steel, in heating process, detects composition weight hundred
Divide and compare C：When 0.002 ~ 0.010%, P≤0.10%, S≤0.005%, temperature is at 1660 DEG C at this time；By molten steel converter tapping, converter
When add in a small amount of aluminium and alloy pre-deoxidation carried out to molten steel, then refined, added in suitable de- in converter to refining furnace
After carbon agent carries out decarbonization process, add aluminium powder and be diffused deoxidation step；
Step 3, continuous casting, the molten steel after step 2 is refined carry out continuous casting protective casting on conticaster, and temperature is controlled at 1120 DEG C
~ 1540 DEG C, pulling rate is maintained at 1.8 ~ 2.2m/min, obtains strand；
The strand that step 3 obtains is sent into heating furnace and is heated to preference temperature by step 4, hot rolling：It is 750 DEG C ~ 900 DEG C, rear to carry out
Breaking down cogging is then delivered on Hot Line and is rolled, and enters finishing rolling step through mill table, at this time slab thickness 120 ~
150mm；
Step 5, pickling are kept the temperature the slab that step 4 obtains, pickling and normalizing treatment, pickling remove the oxygen of hot rolled strip
Compound, the defects of to prevent from being cold rolled to product surface, should during slow heating slab to 800 DEG C, keep the temperature to Slow cooling；
Step 6, cold rolling will carry out step 5 treated slab and be sent to cold mill complex to carry out cold-rolling process, by the thickness of slab
It controls in 10mm or so, online smooth, trimming and oil surface then is carried out to the slab rolled；
Slab, is heated slowly to 950 DEG C ~ 1100 DEG C by step 7, annealing under nitrogen protection, keeps the temperature 6 ~ 12h, until temperature is cold
But it comes out of the stove to room temperature.
2. the preparation process of electromagnetic ore separator silicon steel core according to claim 1, it is characterised in that：The silicon steel core material
The component ratio of material is preferably：C：0.012%, Si:2.50%, Mn：1.2%, P≤0.10%, S≤0.005%, Als：0.80%, N≤
0.002%, Cr：0.01%, remaining is Fe and inevitable impurity.
3. the preparation process of electromagnetic ore separator silicon steel core according to claim 1, it is characterised in that：The silicon steel core material
The component ratio of material is preferably：C：0.010%, Si:3.00%, Mn：1.0%, P≤0.10%, S≤0.005%, Als：1.0%, N≤
0.002%, Cr：0.03%, remaining is Fe and inevitable impurity.
4. the preparation process of electromagnetic ore separator silicon steel core according to claim 1, it is characterised in that：The silicon steel core material
The component ratio of material is preferably C：0.007%, Si:3.50%, Mn：0.6%, P≤0.10%, S≤0.005%, Als：1.20%, N≤
0.002%, Cr：0.03%, remaining is Fe and inevitable impurity.
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