CN108193123A - A kind of anti-corrosion reinforcing bar and preparation method thereof - Google Patents
A kind of anti-corrosion reinforcing bar and preparation method thereof Download PDFInfo
- Publication number
- CN108193123A CN108193123A CN201711478148.6A CN201711478148A CN108193123A CN 108193123 A CN108193123 A CN 108193123A CN 201711478148 A CN201711478148 A CN 201711478148A CN 108193123 A CN108193123 A CN 108193123A
- Authority
- CN
- China
- Prior art keywords
- copper
- reinforcing bar
- preparation
- corrosion reinforcing
- coal dust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
- C21B13/105—Rotary hearth-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
- C22C35/005—Master alloys for iron or steel based on iron, e.g. ferro-alloys
-
- 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
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of anti-corrosion reinforcing bars and preparation method thereof, belong to steel preparing technical field, solve the problems, such as that alloy preparation process in the prior art is cumbersome, of high cost using the wasting of ferro element, the whole preparation process of anti-corrosion reinforcing bar in expensive concentrate and preparation process.The step of preparation method, is as follows：Lateritic nickel ore, copper ashes and coal dust are dried, crushed, levigate and screening, is uniformly mixed, obtains mixture of raw material；Calcium hydroxide flux and syrup additive are added in above-mentioned mixture of raw material, is uniformly mixed, obtains material to be restored；It treats reducing material and carries out pressure ball, drying, obtain pelletizing；Pelletizing addition rotary hearth furnace is subjected to reduction crushing-magnetic selection separation briquetting or molten point of reduction, obtains nickel chromium triangle copper-iron alloy；Smelting molten steel is carried out by converter or electric furnace, above-mentioned nickel chromium triangle copper-iron alloy is added in molten steel tapping process, by refining, continuous casting and hot rolling, obtains anti-corrosion reinforcing bar.Above-mentioned preparation method can be used for preparing anti-corrosion reinforcing bar.
Description
Technical field
The present invention relates to a kind of steel preparation methods more particularly to a kind of anti-corrosion reinforcing bar and preparation method thereof.
Background technology
Hot-rolled reinforced bar mainly includes Ribbed Bar and plain bar, is important concrete reinforcement steel material, extensive use
In the stress main reinforcement of reinforced concrete building, stirrup, arrangement of reinforcement etc..
The production of anti-corrosion reinforcing bar is mainly in steelmaking process by dilval, ferrochrome and copper alloy with alloy form
It is added in molten steel and carries out alloying to improve the corrosion resisting property of steel.But gradually subtracting with resources such as nickel, chromium and copper
Few, the production cost of anti-corrosion reinforcing bar can be continuously improved.
World's chromite deposit be mainly distributed on East African Rift Valley mine belt, Eurasian boundary mountain Ural mine belt, Alps-
Himalaya mine belt and Pacific Rim mine belt.Chromium ore resource distribution is more concentrated, and is concentrated mainly on Kazakhstan and South Africa two
State, the stock number that the two countries are possessed account for about the 90% of world's gross reserves.China is a chromite resources critical shortage
Country, main chromite include Xizang tourism chromite (chromite deposit of China's maximum is also China's chromite
The main place of production), Miyun County put horse valley chromite, the big dongle Ji chromite in respectful north, Sartohai's chromite etc..China's chromium
Ore deposit feature：Deposit scale is small, and distribution is scattered；Distributed areas are unbalanced, and condition of utilization is poor；Lean ore and rich ore reserves are substantially each
Account for half；Dew mining is few, and chromium-rich iron ore that is small and easily adopting all has been adopted；Genetic type of ore deposit is single.
In the prior art, the preparation of dilval, ferrochrome and copper alloy belongs to raw material processing and manufacturing field.Mesh
Before, the production procedure of dilval is：Ore-burden → rotary kiln drying → rotary kiln baking → electro-smelting obtains thick ferronickel
→ LF refining → refined ferronickel water quenching → ferronickel granule.The production procedure of ferrochrome is：Chrome ore gravity treatment obtains fine chrome mine → basis
Smelting requirements are carried out with ore deposit → pelletizing (or sintering) → electric furnace smelting → carbon containing ferrochrome.Copper alloy is mainly using pyrogenic process
What metallurgy was recycled from copper sulfide concentrate and reclaimed copper.Include the following steps：Matte smelting, by copper concentrate (cupric 13%~
30%) it is smelted into the copper matte regulus (or matte) of cupric 40%~75%；By Copper Matte Converting into the blister copper of more than 98% cupric；It will be thick
Copper refining is into anode copper (cupric 99.5%)；Tough cathode (cupric 99.99%) is obtained to anode copper electrolyzing refining, as copper closes
Gold.
And for the preparation of anti-corrosion reinforcing bar, belonging to steel smelts manufacturing field, steel-making enterprise commercially above-mentioned nickel
Ferroalloy, ferrochrome and copper alloy are then added in molten steel and carry out microalloying.
It is apparent that above-mentioned dilval, the preparation of ferrochrome and copper alloy and the preparation of high-strength corrosion-resistant steel belong to two
A different field, raw material need to obtain dilval, ferrochrome and copper alloy by reduction, separation and purifying, pure
During change, the Fe elements in raw material can be used as Solid state fermentation, be not used to subsequent steel and smelt, so as to cause Fe elements
Waste.
Further, since raw material need that steel-making enterprise can be reached by the flows such as pack, transport, selling and are used for subsequently
Anti-corrosion reinforcing bar preparation, raw material cannot be used directly for the preparation of anti-corrosion reinforcing bar, so as to cause the preparation of entire anti-corrosion reinforcing bar
Process it is cumbersome, lead to the increase of anti-corrosion reinforcing bar cost.
Invention content
In view of above-mentioned analysis, the present invention is intended to provide a kind of anti-corrosion reinforcing bar and preparation method thereof, solves the prior art
Middle alloy preparation process is using the wasting of ferro element, the entire preparation of anti-corrosion reinforcing bar in expensive concentrate and preparation process
The problem of process is cumbersome, of high cost.
The purpose of the present invention is mainly achieved through the following technical solutions：
The present invention provides a kind of preparation methods of anti-corrosion reinforcing bar, include the following steps：
Step S1：Lateritic nickel ore, copper ashes and coal dust are dried, crushed, levigate and screening, is uniformly mixed, obtains
Mixture of raw material；
Step S2：Calcium hydroxide flux and syrup additive are added in mixture of raw material, are uniformly mixed, obtains treating also
Raw material；
Step S3：It treats reducing material and carries out pressure ball, drying, obtain pelletizing；
Step S4：Pelletizing addition rotary hearth furnace is restored and post-processed, obtains nickel chromium triangle copper-iron alloy；
Reduction and post processing are reduction-broken-magnetic separation separation-briquetting or reduction-molten point；
Step S5：Smelting molten steel adds in above-mentioned nickel chromium triangle copper-iron alloy in molten steel tapping process, by refining, continuous casting and
Hot rolling obtains anti-corrosion reinforcing bar, and the mass percent of the component of this is anti-corrosion reinforcing bar is C 0.16~0.25%, and Si 0.30~
0.65%, Mn 0.95~1.35%, P≤0.030%, S≤0.030%, Ni 0.35~0.65%, Cr 0.30~0.75%,
Cu 0.20~0.60%, remaining is Fe and inevitable residual elements.
Further, step S1 includes the following steps：Lateritic nickel ore at 650~800 DEG C is dried, removes table water and knot
Brilliant water；Copper ashes and coal dust are dried at 150 DEG C~200 DEG C；Lateritic nickel ore, copper ashes and coal dust after drying is crushed to granularity
0.1mm~25mm；Broken lateritic nickel ore, copper ashes and coal dust are milled to the particle that granularity is -120 mesh with ball mill and account for 80%
More than.
Further, the mass percent of the constituent of lateritic nickel ore be Ni 0.6%~2.1%, Cr0.5%~
2.5%, Al2O32.0~5.0%, CaO 0.4~6.0%, MgO 2.0~19.5%, SiO25.5~40.5%, TFe 18.0
~49.5%；
The mass percent of the constituent of copper ashes is Cu 0.3%~1.5%, CaO 2.0~3.85%, MgO 0.85
~1.25%, SiO227.5~33.0%, TFe 38.5~43.5%；
Coal dust is anthracite, volatile matter 10% hereinafter, ash content 12% hereinafter, more than 78% fixed carbon.
Further, the mass percent that FeO accounts for lateritic nickel ore gross mass in the TFe of lateritic nickel ore is 0.05~2.0%；
The mass percent that FeO accounts for copper ashes gross mass in the TFe of copper ashes is 41.0~43.5%.
Further, in step S2, by mass percentage, the addition of lateritic nickel ore is 24.04%~44.03%,
The addition of copper ashes is 26.12%~39.81%, and the addition of coal dust is 7.99%~16.50%, the addition of calcium hydroxide flux
It is 3.90%~29.86% to measure, and the addition of syrup additive is 4.76%.
Further, in step S4, the mass percent of the component of nickel chromium triangle copper-iron alloy is Ni0.80~2.22%, Cr
0.80~2.00%, Cu 0.85~1.90%, TFe 92.00~94.50%, C1.25~1.60%, surplus are other.
Further, in step S5, above-mentioned nickel chromium triangle copper-iron alloy is added in molten steel tapping process and is included the following steps：When
During tapping 1/10 (mass ratio), the deoxidier of 1/3 (mass ratio) is added in；When tap 1/4 (mass ratio) when, into molten steel successively plus
Enter silicon carbide, silicomangan, carburant, ferrosilicon, remaining deoxidier, nickel chromium triangle copper-iron alloy, fluorite and lime.
Further, in step S5, start rolling temperature >=950 DEG C of hot rolling；Finishing temperature >=850 DEG C.
Further, following steps are further included after continuous casting, before hot rolling：The strand that continuous casting obtains is heated, is added
Hot temperature is 1050 ± 10 DEG C, and heating time is 60~90min.
The present invention also provides a kind of anti-corrosion reinforcing bar, anti-corrosion reinforcing bar is made using above-mentioned preparation method.
Compared with prior art, the present invention has the beneficial effect that：
A) nickel chromium triangle copper-iron alloy made from the preparation method of anti-corrosion reinforcing bar provided by the invention, need not move through purifying, packaging,
It the flows such as transports, sell, can be directly used for the smelting of anti-corrosion reinforcing bar, preparation process flow is simple, and manufacturing cost is low.Meanwhile by
Cheap in being used to prepare alloy raw material, preparation process needs not move through purifying, therefore can retain the members of the Fe in raw material
Element, for subsequent anti-corrosion reinforcing bar, so as to reduce the addition of molten steel, even if the smelting of comparison ordinary steel, cost
It can substantially reduce.In practical applications, compared to the preparation method of existing anti-corrosion reinforcing bar, anti-corrosion reinforcing bar provided by the invention
Preparation method can by production cost reduce by 10~15%, achieve unexpected technique effect.
B) preparation method of anti-corrosion reinforcing bar provided by the invention is using the very cheap lateritic nickel ore of price and copper metallurgy
Raw material of the waste generated in journey --- the copper ashes as production copper-iron alloy, by direct-reduction, obtains nickel chromium triangle copper-iron alloy,
Low energy consumption for cost of material and manufacturing process, and the substitution prior art purchases sufficiently expensive dilval, ferrochrome and copper alloy, real
The comprehensive utilization of resources of lateritic nickel ore and copper ashes is showed, the of low cost of anti-corrosion reinforcing bar is produced using this method, is had very strong
Practicability and the market competitiveness.
C) preparation method of anti-corrosion reinforcing bar provided by the invention is by extracting the copper in copper ashes, iron and being used to produce corrosion-resisting steel
Muscle solves the problems, such as that copper ashes occupies a large amount of soils, pollution environment, turns waste into wealth.
D) preparation method of anti-corrosion reinforcing bar provided by the invention can shorten production process by continuous casting billet Direct Rolling,
Energy consumption is saved, using natural cooling or the cold mode of air-cooled control, avoids wearing water and martensitic structure occurs and cause brittle failure.
Other features and advantages of the present invention will illustrate in the following description, also, partial become from specification
It obtains it is clear that being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and is obtained in book, claims and attached drawing.
Description of the drawings
Attached drawing is only used for showing the purpose of specific embodiment, and is not considered as limitation of the present invention, in entire attached drawing
In, identical reference mark represents identical component.
Fig. 1 is the flow chart of the preparation method of anti-corrosion reinforcing bar provided by the invention.
Specific embodiment
The preferred embodiment of the present invention is specifically described below in conjunction with the accompanying drawings, wherein, attached drawing forms the application part, and
It is used to illustrate the principle of the present invention together with embodiments of the present invention.
The present invention provides a kind of preparation method of anti-corrosion reinforcing bar, as shown in Figure 1, including the following steps：
Step S1：Raw material (lateritic nickel ore, copper ashes and coal dust) are dried, are crushed, it is levigate and screening etc. before
Reason, the raw material after pre-treatment is uniformly mixed, obtains mixture of raw material.
Specifically, in above-mentioned steps S1, pretreatment process may include steps of：By lateritic nickel ore 650~800
It is dried at DEG C, removes table water and the crystallization water；Copper ashes and coal dust are dried at 150 DEG C~200 DEG C；By the laterite nickel after drying
Ore deposit, slag and coal dust are crushed to granularity 0.1mm~25mm；Broken lateritic nickel ore, copper ashes and coal dust are milled to grain with ball mill
It spends and accounts for more than 80% for the particle of -120 mesh.After above-mentioned pre-treatment, the moisture of raw material is substantially removed, while granularity
Become smaller so that raw material can fully react, and improve the product recovery rate of sequential reduction reaction.
For the composition of raw material, the mass percent of the constituent of lateritic nickel ore is Ni 0.6%~2.1%, Cr
0.5%~2.5%, Al2O32.0~5.0%, CaO 0.4~6.0%, MgO 2.0~19.5%, SiO25.5~40.5%,
TFe 18.0~49.5%, wherein, the mass percent that FeO accounts for lateritic nickel ore gross mass in TFe is 0.05~2.0%；Copper ashes
Constituent mass percent be Cu 0.3%~1.5%, CaO 2.0~3.85%, MgO 0.85~1.25%, SiO2
27.5~33.0%, TFe38.5~43.5%, wherein, in TFe FeO account for the mass percent of copper ashes gross mass for 41.0~
43.5%.Coal dust is anthracite, volatile matter 10% hereinafter, ash content 12% hereinafter, more than 78% fixed carbon.By the composition of raw material into
Divide and limit within the above range, on the basis of there can be abundant copper in raw material is ensured, there is abundant ferro element,
So as to improve the utilization rate of ferro element, the addition of the molten steel in reinforcing bar smelting is reduced, further reduces anti-corrosion reinforcing bar
Production cost.
Step S2：Calcium hydroxide flux and syrup additive are added in above-mentioned mixture of raw material, is uniformly mixed, obtains
Material to be restored.
Wherein, calcium hydroxide flux carries out conversion weighing (CaO/SiO by basicity for 0.6~1.22=0.6~1.2), syrup
Additive for lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide flux total weight 6%~8%, coal dust by C/O be 1.2~1.4
Conversion weighing, lateritic nickel ore and copper ashes is carried out to be counted according to alloying element content proportion requirement and recovery rate in anti-corrosion reinforcing bar
It calculates and determines.Specifically, by mass percentage, the addition of lateritic nickel ore (low nickel minerals) is 24.04%~44.03%, copper
The addition of slag is 26.12%~39.81%, and the addition of coal dust is 7.99%~16.50%, the addition of calcium hydroxide flux
It is 3.90%~29.86%, the addition of syrup additive is 4.76% and outer water distribution 5%, wherein, fixed carbon 80 in coal dust~
82.39%, CaO 70~71.5% in calcium hydroxide.
Step S3：In order to which reaction mass is made not crushed in reduction furnace, the pulverization rate of Direct Reduction is reduced, is needed
Reducing material is treated on high pressure para-roller ball pressing machine and carries out pressure ball, drying, obtains pelletizing, pressure ball pressure is 10MPa~12MPa, is obtained
The shape of the pelletizing arrived is pillow, and size is 20 × 20 × 30mm3；
Step S4：Pelletizing addition rotary hearth furnace is restored and post-processed, obtains nickel chromium triangle copper and iron described in nickel chromium triangle copper-iron alloy
The mass percent of the component of alloy is Ni 0.80~2.22%, Cr 0.80~2.00%, Cu 0.85~1.90%, TFe
92.00~94.50%, C 1.25~1.60%, surplus are other.
Specifically, above-mentioned reduction and post processing may be used two ways (reduction-broken-magnetic separation separation-briquetting or
Reduction-molten point).
Wherein, reduction-broken-magnetic separation separation-briquetting specifically comprises the following steps：Pelletizing addition rotary hearth furnace is gone back
Original, the pelletizing after being restored, reduction temperature are 1300 DEG C~1380 DEG C, and the recovery time is 20min~30min, and control turns bottom
Furnace atmosphere is reducing atmosphere, and air-fuel ratio is 0.80~0.85, and furnace pressure is -5Pa~3Pa, and reduction dump temperature is 900
DEG C~1050 DEG C；By the pelletizing after reduction by vertical cooling, Exposure degree is crushed to grain size as 2mm~8mm, Ran Hou
Magnetic separation separation, briquetting are carried out under the magnetic field intensity of 120mT~200mT, obtained concentrate is nickel chromium triangle copper-iron alloy.Using such
Reduction and post processing mode, technological process is short, and equipment investment is small, but yield of alloy is slightly lower, and impurity is slightly more in alloy.
Reduction-molten point specifically comprises the following steps：Pelletizing addition rotary hearth furnace is restored, the pelletizing after being restored,
Reduction temperature is 1300 DEG C~1380 DEG C, and the recovery time is 15min~20min；Pelletizing after reduction, which is sent into, to melt divides stove to carry out
It is molten point, molten that temperature is divided to be 1400 DEG C~1480 DEG C, it is 15min~25min between molten timesharing, slag sluicing system obtains the conjunction of nickel chromium triangle copper and iron
Gold.Using such reduction and post processing mode, equipment investment is big, but yield of alloy is high, and impurity is few in alloy.
Step S5：Smelting molten steel adds in above-mentioned nickel chromium triangle copper-iron alloy in molten steel tapping process, by refining, continuous casting and
Hot rolling obtains anti-corrosion reinforcing bar, and the mass percent of the component of this is anti-corrosion reinforcing bar is C 0.16~0.25%, and Si 0.30~
0.65%, Mn 0.95~1.35%, P≤0.030%, S≤0.030%, Ni 0.35~0.65%, Cr 0.30~0.75%,
Cu 0.20~0.60%, remaining is Fe and inevitable residual elements.
Step S51：Pneumatic steelmaking
(1) ingredient requirement
It is blast-melted to meet the following conditions
Ferroalloy：Add the alloys such as silicomanganese, ferromanganese, ferrosilicon, it is desirable that material is clean, dry.
Deoxidier：The deoxidations such as Si-AL-Ba, Si-Ca-Ba.
Lime：CaO >=88%.
(2) converter is packed into and blows
Total charge weight control is in heat size ± 2 ton, and scrap ratio control is 35% hereinafter, otherwise by this information notice converter furnace superintendent
Adjust cold ball addition.It is controlled using the bottom blowing of PLC automatic control modes, is supplied oxygen using the operation of buckling rifle position is become.
Slagging regime：Converting process lime adding amount is calculated according to following formula.
Lime adding amount=2.14 × [Si] molten iron × basicity × molten iron charge weight/(CaO lime-basicity × SiO2Stone
Ash)
It can suitably be adjusted with reference to upper heat lime adding amount and terminal composition.
Converter requires to accurately control aim carbon, avoids Molten Steel over-oxidation, stringent to control after-blow number ≯ 2 time.
Terminal ingredient：C≤0.06%, P≤0.020%, S≤0.025%, if control requirement is not achieved in endpoint carbon content,
It then carries out a little blowing processing；If control requirement is not achieved in terminal P, S content, plus lime point blows processing.
Outlet temperature：Outlet temperature is controlled at 1650 DEG C or more, otherwise carries out a little blowing processing.
Finishing slag composition：Finishing slag basicity R >=3.0, MgO=6~10%, TFe≤20%.
(3) converter tapping
Slag-stopping tapping, slag thickness control≤50mm must be used during tapping.
Tapping front opening Bottom Blowing, control ladle blow 300~500mm of diameter open.
Deoxidier is manually added before 1/4 (mass ratio) of tapping, other alloys tap 1/4 when add in, tapping 3/4 when add
It is complete, to carry out deoxidation alloying.Converter determines alloy addition depending on situations such as molten steel amount, molten steel oxidation, alloying component.
When molten steel amount is 1/10 in ladle, 1/3 deoxidier (ferro-silico aluminium) is added in, when molten steel amount is 1/4 in packet, is pressed
" silicon carbide → silicomangan → carburant → ferrosilicon → 2/3 deoxidier → nickel chromium triangle copper-iron alloy → fluorite → lime " sequence adds in
Alloy.If there is exception in alloy or top slag adition process, exception information is notified into refining furnace furnace superintendent.
Deoxidier addition determines that carburant is added in be determined according to tapping carbon content according to terminal oxidisability.
Alloy addition is calculated according to following formula：
Alloy addition (kg)=(limit-molten steel remnants compositions in being controlled into refining furnace composition)/(alloy grade × alloy
Absorptivity) × tap (t)
(3) Argon stand control
Temperature control is with reference to as follows before argon：Stove pours in first 1630~1650 DEG C of stove, company：1600~1620 DEG C of A classes packet；B classes
1610~1630 DEG C of packet；1620~1640 DEG C of C classes packet；1630~1650 DEG C of D classes packet.
Argon blowing time controls：A class packets argon blowing time is not less than 5 minutes, and B, C, D class packet extend 1~2 on A class package bases
Minute.
If argon blowing time is not less than 2 minutes again after adding alloy or temperature adjustment.
Temperature control is with reference to as follows after argon：Stove pours in first 1595~1605 DEG C of stove, company：1575~1585 DEG C of A classes packet；B classes
1580~1590 DEG C of packet；1585~1595 DEG C of C classes packet；1595~1605 DEG C of D classes packet.
Step S52：LF stoves refine
Sampling, thermometric after power transmission 8min, liquid steel refining electric power feeding time are more than 15min, and LF stoves are in station time >=38 minute.
Alloy bulk cargo is equipped with, the fine tuning to [C], [Si], [Mn] content progress inner quality standard in molten steel.
SiCa or SiCaBa line >=150 meter, soft blow argon >=3 minute are fed when LF stoves are outbound.
The molten steel composition requirement for going out LF stoves must be into internal control range.
Alloy addition requires to be adjusted according to internal control composition, and specific addition is according to following formula：
Alloy addition=(limit-molten steel remnants compositions in internal control composition)/(alloy grade × alloy absorption rate) × tapping
Amount
Tapping analysis after being added according to each alloy determines whether to continue to adjust, if continuing to adjust less than internally controlling requirement lower limit
It is whole, if continuing normal processing higher than the internally controlling requirement upper limit.
Step S53：Continuous casting
With long nozzle molding casting, cast mustn't be opened wide.
Metal in Tundish mustn't be exposed, packet liquid level not show in guarantee.
Pulling rate must be carried out by billet withdrawal curve, and pulling rate must not frequently, significantly change.
Crystallizer protecting residue uses straight carbon steel covering slag, and keeps drying.
1505 DEG C of steel grade liquidus temperature, middle packet representative temperature≤1535 DEG C.
Cc billet surface quality presses YB/T 2011-2014 (continuous casting steel machine square billet and rectangular bloom).
Step S54：Steel rolling
(1) heating steel billet
Raw material is checked and accepted：It is rolled using the 150 × 150mm or 160 × 160mm continuous casting square billet steel billets of steel mill production,
Continuous casting billet size, shape and surface quality must be measured inspection by entering stokehold, curved steel, the defects of central pipe is serious steel billet
Must must not choose and enter stove, stove must not be entered by being shorter in length than 9 meters.
Raw material heats：Ensure steel billet time inside furnace and heating temperature.
(2) rolling requirements
Preparation work area must online under to milling train, each position is adjusted in place, guide centering groove, guide and guard and roll
Pitch requirements：Inlet guide roughing mill is not more than 4mm, and middle milling train is not more than 3mm, and finishing mill is not more than 2mm；Outlet guide is little
In 2mm.The outlet guide the tip of the tongue is excessively high, which to coincide with groove, bad must polish.
Water hose nozzle on milling train must assure that whole is unobstructed, and water pipe must not have the phenomenon that damaged leak；Screwdown gear
It adjusts flexibly, preceding both sides roll gap of reaching the standard grade will be consistent, it is impossible to which there are unilateral phenomenons.
The milling train that finished product roller must select epidemic situation comparison good is assembled, and table measurement must be played after assembling.Roll is not
It obtains and there is wrong roller phenomenon.
Angle iron and outlet guide pressing plate fixing axle on all vertical mill guide and guard dovetail mounts of finish rolling must be consolidated at one end
It sets, prevents from falling influence production when replacing guide and guard online.
It must assure that kink normally comes into operation, the deflector roll of serious wear must be replaced in kink, kink negative mill
It damages after serious place must carry out repair welding and polishes smooth again, it must not be jagged.
(3) technology controlling and process
1) heating temperature：1050±10℃；Heating time：60~90min.
2) start rolling temperature >=950 DEG C；Finishing temperature >=850 DEG C.
3) tension force：Rolled within pre-add 2% during examination is thick between exchange slot or the rack of roll change before rolling, finish rolling pre-add 3% with
It is interior；Mild tension condition and kink must all be put into.
4) during first steel rolling, each post personnel bitten on head after next rack need to each passage red base size and into
Product size carries out card amount and milling train is adjusted correspondingly, while master station draws according to heap of first steel between each rack and closes
System just allows examination to roll second steel after having adjusted tension.
5) reinforcing bar through natural cooling or air-cooled, does not allow Water cooling after finish to gauge.
(4) finishing controls
Burr is hooked in time in bar cold shears shear history, prevent lap-shear from overspending and generating shear distortion.Reinforcing bar is pressed
Scale is delivered, and cut lengths is 12m tolerances ± 25mm.Bar bundling requirement：Scale makes a call to 7 passages, two ends in total
It is required that twice are beaten in overlapping.Specific bundling number is performed by existing rolling mill practice operating instruction.
(5) it examines and checks and accepts
Steel constitution experiment carries out ingredient inspection as the smelting component of the stove molten steel, composition inspection by a unit of every stove molten steel
It tests result and has to comply with table one and require.
Product inspection, examination.Finished product need to make stretching detection (at least three sample of every batch of, when batch weight is more than 90 tons
When, every 30 tons of requirements increase a sample), recurvation detection (every 30 tons of samples).
The preparation method of anti-corrosion reinforcing bar provided by the invention, required Ni, Cr, Cu alloying element be by lateritic nickel ore and
Copper ashes matches ore deposit, and after direct-reduction, magnetic separation or molten point, the Ni and Cr contained copper-iron alloy of acquisition is added in molten steel.Specifically, it presses
It according to the ingredient of anti-corrosion reinforcing bar, is calculated by yield of alloy, determines the ratio of lateritic nickel ore, copper ashes, reducing agent, flux and additive
, division technique production acquisition nickel chromium triangle copper-iron alloy is melted after magnetic separation and briquetting or reduction after reduction, is tapped after smelting molten steel
Nickel chromium triangle copper-iron alloy is added in the process, can be prepared by the conventional smelting molten steel such as refining, continuous casting and rolling and hot rolling technology resistance to
Lose reinforcing bar.
Compared with prior art, nickel chromium triangle copper-iron alloy made from the preparation method of anti-corrosion reinforcing bar provided by the invention, without
By purifying, packing, transporting, the flows such as selling, the smelting of anti-corrosion reinforcing bar is can be directly used for, preparation process flow is simple, prepares
It is at low cost.Simultaneously as the alloy after preparing therefore can retain the Fe elements in raw material without purifying, for follow-up
Anti-corrosion reinforcing bar, so as to reduce the addition of molten steel, even if the smelting of comparison clean steel, cost can also substantially reduce.
In practical applications, compared to the preparation method of existing anti-corrosion reinforcing bar, the preparation method energy of anti-corrosion reinforcing bar provided by the invention
It is enough that production cost is reduced by 10~15%, achieve unexpected technique effect.
Meanwhile minable nickel resources have two classes in the world：Lateritic nickel ore and nickel sulfide ore.In existing nickel resources gross reserves
In, lateritic nickel ore accounts for 70%, and nickel sulfide ore accounts for 30%.Due to nickel sulfide ore extraction process maturation, at present, 60% nickel yield is come
Derived from nickel sulfide ore.The world is few for the nickel sulfide ore resource of exploitation in the recent period, and the nickel sulfide ore resource exploration period
It is long with the construction period, and lateritic nickel ore is resourceful, cost of winning is low, and lateritic nickel ore is the main source of following nickel.Using ten
Divide the waste generated during cheap lateritic nickel ore and copper metallurgy --- raw material of the copper ashes as production nickel chromium triangle copper-iron alloy,
Rationally using the copper in the nickel element and chromium and copper ashes in lateritic nickel ore, by direct-reduction, nickel chromium triangle copper is obtained
Low energy consumption for ferroalloy, cost of material and manufacturing process, and the substitution prior art purchases sufficiently expensive nichrome and copper alloy, realizes
The comprehensive utilization of resources of lateritic nickel ore and copper ashes produces the of low cost of anti-corrosion reinforcing bar using this method, has very strong reality
With property and the market competitiveness.
In addition, in recent years, copper yield is ever-increasing simultaneously, a large amount of copper ashes is had accumulated.At present, only a small amount of copper ashes is used
In paving the way and building trade, most copper slag muck are deposited.The preparation method of anti-corrosion reinforcing bar provided by the invention is by extracting in copper ashes
Copper, iron and for producing anti-corrosion reinforcing bar, solves the problems, such as that copper ashes occupies a large amount of soils, pollutes environment, turns waste into wealth.
Embodiment 1
The main component of low nickel high ferro lateritic nickel ore is referring to table 1, copper ashes, coal dust and niter ash composition point in the present embodiment
Not referring to table 2, table 3 and table 4.
The main component (wt%) of 1 low nickel high ferro lateritic nickel ore 1# of table
The main component (wt%) of 2 copper ashes of table
The main component (wt%) of 3 coal dust of table
The main component (wt%) of 4 calcium hydroxide of table
In the present embodiment, using reduction-magnetic separation process route, nickel chromium triangle copper is produced using low nickel high ferro lateritic nickel ore and copper ashes
The operating procedure of ferroalloy is as follows：
By low nickel high ferro lateritic nickel ore in 650 DEG C of drying, copper ashes and coal dust in 150 DEG C of drying, be crushed to granularity for 0.1~
Lateritic nickel ore, copper ashes and coal dust are milled to the particle that granularity is -120 mesh with ball mill and account for more than 80% by 25mm；Weigh laterite nickel
Ore deposit, copper ashes, coal dust, calcium hydroxide, syrup ratio be 100：72.45：35.01：8.86：10.82；The amount of coal dust is according to C/O
1.2 carry out conversion weighing, and flux calcium hydroxide carries out conversion weighing (CaO/SiO by basicity for 0.62=0.6), additive syrup is pressed
Lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide total weight 6% are weighed, and water pressed by lateritic nickel ore powder, copper ashes powder, coal
Powder, calcium hydroxide total weight 5% are weighed, and are mixed load weighted by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide
It is even, it adds in syrup and water during mixing, raw material feeding two pairs of rollers ball press is subjected to pressure ball with belt after mixing, pressure ball pressure is
10MPa, gained pelletizing size are 20 × 20 × 30mm.Rotary hearth furnace hopper, rotary hearth furnace high-temperature flue gas pair are packed into after pelletizing drying
Pelletizing is preheated, and after pelletizing is preheated to 230 DEG C, pelletizing is continuously and uniformly stepped into rotary hearth furnace using distributing device and is restored,
Reduction temperature be 1300 DEG C, the recovery time be 30 minutes, control rotary hearth furnace in atmosphere be reducing atmosphere, air-fuel ratio 0.8, stove
Interior pressure is -2Pa or so, and dump temperature is 900 DEG C, continuous pulp discharge after reduction, and furnace charge is cooled to room by perpendicular cooler
Temperature.Pelletizing after reduction is crushed to 2~8mm, magnetic separation separation is then carried out under the magnetic field intensity of 120mT and briquetting obtains nickel
Chromium-copper ferroalloy.
The nickel chromium triangle copper-iron alloy that the present embodiment finally obtains into being grouped as referring to table 5.
The ingredient (wt%) of 5 nickel chromium triangle copper-iron alloy of table
Embodiment 2
The main component of nickelic low iron lateritic nickel ore used in the present embodiment is referring to table 6, copper ashes, coal dust and calcium hydroxide
Ingredient is respectively referring to table 2, table 3 and the table 4 in embodiment 1.
The main component (wt%) of the nickelic low iron lateritic nickel ore 2# of table 6
In the present embodiment, using reduction-magnetic separation process route, nickel chromium triangle copper is produced using nickelic low iron lateritic nickel ore and copper ashes
The operating procedure of ferroalloy is as follows：
By nickelic low iron lateritic nickel ore in 700 DEG C of drying, copper ashes and coal dust in 180 DEG C of drying, be crushed to granularity for 0.1~
Lateritic nickel ore, copper ashes and coal dust are milled to the particle that granularity is -120 mesh with ball mill and account for more than 80% by 25mm；Weigh laterite nickel
Ore deposit, copper ashes, coal dust, calcium hydroxide, syrup ratio be 100：141.28：32.35：64.38：16.90；The amount of coal dust is according to C/O
Conversion weighing is carried out for 1.3, flux calcium hydroxide carries out conversion weighing (CaO/SiO by basicity for 0.72=0.7), additive syrup
It 7% is weighed by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide total weight, water pressed by lateritic nickel ore powder, copper ashes powder, coal
Powder, calcium hydroxide total weight 5% are weighed, and are mixed load weighted by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide
It is even, it adds in syrup and water during mixing, raw material feeding two pairs of rollers ball press is subjected to pressure ball with belt after mixing, pressure ball pressure is
11MPa, gained pelletizing size are 20 × 20 × 30mm.Rotary hearth furnace hopper, rotary hearth furnace high-temperature flue gas pair are packed into after pelletizing drying
Pelletizing is preheated, and after pelletizing is preheated to 220 DEG C, pelletizing is continuously and uniformly stepped into rotary hearth furnace using distributing device and is restored,
Reduction temperature be 1340 DEG C, the recovery time be 25 minutes, control rotary hearth furnace in atmosphere be reducing atmosphere, air-fuel ratio 0.83,
Furnace pressure is 3Pa or so, and dump temperature is 1000 DEG C, continuous pulp discharge after reduction, and furnace charge is cooled to by perpendicular cooler
Room temperature.Pelletizing after reduction is crushed to 2~8mm, magnetic separation separation is then carried out under the magnetic field intensity of 150mT and briquetting obtains
Nickel chromium triangle copper-iron alloy.
The nickel chromium triangle copper-iron alloy that the present embodiment finally obtains into being grouped as referring to table 7.
The ingredient (wt%) of 7 nickel chromium triangle copper-iron alloy of table
Embodiment 3
The main component of nickelic low iron lateritic nickel ore used in the present embodiment is referring to the table 6 in embodiment 2, copper ashes, coal
Powder and niter ash composition are respectively referring to table 2, table 3 and the table 4 in embodiment 1.
In the present embodiment, using reduction-magnetic separation process route, nickel chromium triangle copper is produced using nickelic low iron lateritic nickel ore and copper ashes
The operating procedure of ferroalloy is as follows：
By nickelic low iron lateritic nickel ore in 800 DEG C of drying, copper ashes and coal dust in 200 DEG C of drying, be crushed to granularity for 0.1~
Lateritic nickel ore, copper ashes and coal dust are milled to the particle that granularity is -120 mesh with ball mill and account for more than 80% by 25mm；Weigh laterite nickel
Ore deposit, copper ashes, coal dust, calcium hydroxide, syrup ratio be 100：113.02：25.74：68.06：15.34；The amount of coal dust is according to C/O
Conversion weighing is carried out for 1.2, flux calcium hydroxide carries out conversion weighing (CaO/SiO by basicity for 0.82=0.8), additive syrup
It 8% is weighed by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide total weight, water pressed by lateritic nickel ore powder, copper ashes powder, coal
Powder, calcium hydroxide total weight 5% are weighed, and are mixed load weighted by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide
It is even, it adds in syrup and water during mixing, raw material feeding two pairs of rollers ball press is subjected to pressure ball with belt after mixing, pressure ball pressure is
12MPa, gained pelletizing size are 20 × 20 × 30mm.Rotary hearth furnace hopper, rotary hearth furnace high-temperature flue gas pair are packed into after pelletizing drying
Pelletizing is preheated, and after pelletizing is preheated to 240 DEG C, pelletizing is continuously and uniformly stepped into rotary hearth furnace using distributing device and is restored,
Reduction temperature be 1380 DEG C, the recovery time be 20 minutes, control rotary hearth furnace in atmosphere be reducing atmosphere, air-fuel ratio 0.85,
Furnace pressure is -5Pa, and dump temperature is 1050 DEG C, continuous pulp discharge after reduction, and furnace charge is cooled to room by perpendicular cooler
Temperature.Pelletizing after reduction is crushed to 2~8mm, magnetic separation separation is then carried out under the magnetic field intensity of 200mT and briquetting obtains nickel
Chromium-copper ferroalloy.
The nickel chromium triangle copper-iron alloy that the present embodiment finally obtains into being grouped as referring to table 8.
The ingredient (wt%) of 8 nickel chromium triangle copper-iron alloy of table
Embodiment 4
Low nickel high ferro lateritic nickel ore, copper ashes, coal dust and niter ash composition are respectively referring in embodiment 1 in the present embodiment
Table 1, table 2, table 3 and table 4.
In the present embodiment, using reduction-molten division technique route, nickel chromium triangle copper is produced using low nickel high ferro lateritic nickel ore, copper ashes
The operating procedure of ferroalloy is as follows：
By low nickel high ferro lateritic nickel ore in 650 DEG C of drying, copper ashes and coal dust in 150 DEG C of drying, be crushed to granularity for 0.1~
Lateritic nickel ore, copper ashes and coal dust are milled to the particle that granularity is -120 mesh with ball mill and account for more than 80% by 25mm；Weigh laterite nickel
Ore deposit, copper ashes, coal dust, calcium hydroxide, syrup ratio be 100：89.17：43.69：31.39：13.21；The amount of coal dust is according to C/O
1.4 carry out conversion weighing, and flux calcium hydroxide carries out conversion weighing (CaO/SiO by basicity for 12=1), additive syrup presses laterite
Nickel minerals powder, copper ashes powder, coal dust, calcium hydroxide total weight 6% are weighed, water by by lateritic nickel ore powder, copper ashes powder, coal dust, disappear
The 5% of lime total weight is weighed, and is carried out mixing by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide by load weighted, is mixed
Syrup and water are added in when even, raw material is sent into two pairs of rollers ball press with belt after mixing carries out pressure ball, and pressure ball pressure is
10MPa, gained pelletizing size are 20 × 20 × 30mm.Rotary hearth furnace hopper, rotary hearth furnace high-temperature flue gas pair are packed into after pelletizing drying
Pelletizing is preheated, and after pelletizing is preheated to 230 DEG C, pelletizing is continuously and uniformly stepped into rotary hearth furnace using distributing device and is restored,
Reduction temperature is 1300 DEG C, and the recovery time is 20 minutes, the product after reduction is sent into melt, stove is divided to carry out molten point, a molten point temperature is
1400 DEG C, be 25 minutes between molten timesharing, slag sluicing system obtains nickel chromium triangle copper-iron alloy.
The nickel chromium triangle copper-iron alloy that the present embodiment finally obtains into being grouped as referring to table 9.
The ingredient (wt%) of 9 nickel chromium triangle copper-iron alloy of table
Embodiment 5
Low nickel high ferro lateritic nickel ore, copper ashes, coal dust and niter ash composition are respectively referring in embodiment 1 in the present embodiment
Table 1, table 2, table 3 and table 4.
In the present embodiment, using reduction-molten division technique route, nickel chromium triangle copper is produced using low nickel high ferro lateritic nickel ore, copper ashes
The operating procedure of ferroalloy is as follows：
By low nickel high ferro lateritic nickel ore in 700 DEG C of drying, copper ashes and coal dust in 180 DEG C of drying, be crushed to granularity for 0.1~
Lateritic nickel ore, copper ashes and coal dust are milled to the particle that granularity is -120 mesh with ball mill and account for more than 80% by 25mm；Weigh laterite nickel
Ore deposit, copper ashes, coal dust, calcium hydroxide, syrup ratio be 100：61.81：39.03：24.52：11.26；The amount of coal dust is according to C/O
1.4 carry out conversion weighing, and flux calcium hydroxide carries out conversion weighing (CaO/SiO by basicity for 1.12=1.1), additive syrup is pressed
Lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide total weight 7% are weighed, and water pressed by lateritic nickel ore powder, copper ashes powder, coal
Powder, calcium hydroxide total weight 5% are weighed, and are mixed load weighted by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide
It is even, it adds in syrup and water during mixing, raw material feeding two pairs of rollers ball press is subjected to pressure ball with belt after mixing, pressure ball pressure is
11MPa, gained pelletizing size are 20 × 20 × 30mm.Rotary hearth furnace hopper, rotary hearth furnace high-temperature flue gas pair are packed into after pelletizing drying
Pelletizing is preheated, and after pelletizing is preheated to 220 DEG C, pelletizing is continuously and uniformly stepped into rotary hearth furnace using distributing device and is restored,
Reduction temperature is 1340 DEG C, and the recovery time is 18 minutes, the product after reduction is sent into melt, stove is divided to carry out molten point, a molten point temperature is
1440 DEG C, be 20 minutes between molten timesharing, slag sluicing system obtains nickel chromium triangle copper-iron alloy.
The nickel chromium triangle copper-iron alloy that the present embodiment finally obtains into being grouped as referring to table 10.
The ingredient (wt%) of 10 nickel chromium triangle copper-iron alloy of table
Embodiment 6
The ingredient of nickelic low iron lateritic nickel ore used in the present embodiment referring to the table 6 in embodiment 2, copper ashes, coal dust and
Niter ash composition is respectively referring to table 2, table 3 and the table 4 in embodiment 1.
In the present embodiment, using reduction-molten division technique route, nickel chromium triangle copper is produced using nickelic low iron lateritic nickel ore, copper ashes
The operating procedure of ferroalloy is as follows：
By nickelic low iron lateritic nickel ore in 800 DEG C of drying, copper ashes and coal dust in 200 DEG C of drying, be crushed to granularity for 0.1~
Lateritic nickel ore, copper ashes and coal dust are milled to the particle that granularity is -120 mesh with ball mill and account for more than 80% by 25mm；Weigh laterite nickel
Ore deposit, copper ashes, coal dust, calcium hydroxide, syrup ratio be 100：137.75：34.23：124.22：19.81；The amount of coal dust is according to C/O
Conversion weighing is carried out for 1.4, flux calcium hydroxide carries out conversion weighing (CaO/SiO by basicity for 1.22=1.2), additive syrup
It 8% is weighed by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide total weight, water pressed by lateritic nickel ore powder, copper ashes powder, coal
Powder, calcium hydroxide total weight 5% are weighed, and are mixed load weighted by lateritic nickel ore powder, copper ashes powder, coal dust, calcium hydroxide
It is even, it adds in syrup and water during mixing, raw material feeding two pairs of rollers ball press is subjected to pressure ball with belt after mixing, pressure ball pressure is
12MPa, gained pelletizing size are 20 × 20 × 30mm.Rotary hearth furnace hopper, rotary hearth furnace high-temperature flue gas pair are packed into after pelletizing drying
Pelletizing is preheated, and after pelletizing is preheated to 240 DEG C, pelletizing is continuously and uniformly stepped into rotary hearth furnace using distributing device and is restored,
Reduction temperature is 1380 DEG C, and the recovery time is 15 minutes, the product after reduction is sent into melt, stove is divided to carry out molten point, a molten point temperature is
1480 DEG C, be 15 minutes between molten timesharing, slag sluicing system obtains nickel chromium triangle copper-iron alloy.
The nickel chromium triangle copper-iron alloy that the present embodiment finally obtains into being grouped as referring to table 11.
The ingredient (wt%) of 11 nickel chromium triangle copper-iron alloy of table
Nickel chromium triangle copper-iron alloy is separately won to obtain by above reduction-magnetic separation or reduction-molten, according to Fig. 1 techniques, the nickel chromium triangle copper and iron of acquisition
Alloy is added in molten steel.It is that obtained molten steel obtains steel billet, steel rolling heating temperature by the refining of LF stoves and continuous casting：1050
±10℃；60~90min of heating time uses continuous casting billet Direct Rolling mode, start rolling temperature >=950 DEG C, and finishing temperature >=
850℃；Reinforcing bar is through natural cooling or air-cooled after finish to gauge, final products performance referring to table 12, corrosion rate meet 400MPa grades it is resistance to
Lose reinforcing bar requirement.
The room-temperature mechanical property and corrosion rate of 12 corrosion-resistant steel bar of table
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of anti-corrosion reinforcing bar, which is characterized in that include the following steps：
Step S1：Lateritic nickel ore, copper ashes and coal dust are dried, crushed, levigate and screening, is uniformly mixed, obtains former material
Expect mixture；
Step S2：Calcium hydroxide flux and syrup additive are added in the mixture of raw material, are uniformly mixed, obtains treating also
Raw material；
Step S3：It treats reducing material and carries out pressure ball, drying, obtain pelletizing；
Step S4：Pelletizing addition rotary hearth furnace is restored and post-processed, obtains nickel chromium triangle copper-iron alloy；
The reduction and post processing are reduction-broken-magnetic separation separation-briquetting or reduction-molten point；
Step S5：Smelting molten steel adds in above-mentioned nickel chromium triangle copper-iron alloy in molten steel tapping process, by refining, continuous casting and hot rolling,
Anti-corrosion reinforcing bar is obtained, the mass percent of the component of this is anti-corrosion reinforcing bar is C 0.16~0.25%, Si 0.30~0.65%, Mn
0.95~1.35%, P≤0.030%, S≤0.030%, Ni 0.35~0.65%, Cr 0.30~0.75%, Cu 0.20~
0.60%, remaining is Fe and inevitable residual elements.
2. the preparation method of anti-corrosion reinforcing bar according to claim 1, which is characterized in that the step S1 includes following step
Suddenly：Lateritic nickel ore at 650~800 DEG C is dried, removes table water and the crystallization water；By copper ashes and coal dust at 150 DEG C~200 DEG C
Drying；Lateritic nickel ore, copper ashes and coal dust after drying is crushed to granularity 0.1mm~25mm；By broken lateritic nickel ore, copper
Slag and coal dust are milled to the particle that granularity is -120 mesh with ball mill and account for more than 80%.
3. the preparation method of anti-corrosion reinforcing bar according to claim 1, which is characterized in that the constituent of the lateritic nickel ore
Mass percent be Ni 0.6%~2.1%, Cr 0.5%~2.5%, Al2O32.0~5.0%, CaO 0.4~6.0%,
MgO 2.0~19.5%, SiO25.5~40.5%, TFe 18.0~49.5%；
The mass percent of the constituent of the copper ashes is Cu 0.3%~1.5%, CaO 2.0~3.85%, MgO 0.85
~1.25%, SiO227.5~33.0%, TFe 38.5~43.5%；
The coal dust be anthracite, volatile matter 10% hereinafter, ash content 12% hereinafter, more than 78% fixed carbon.
4. the preparation method of anti-corrosion reinforcing bar according to claim 3, which is characterized in that FeO in the TFe of the lateritic nickel ore
The mass percent for accounting for lateritic nickel ore gross mass is 0.05~2.0%；FeO accounts for the matter of copper ashes gross mass in the TFe of the copper ashes
It is 41.0~43.5% to measure percentage.
5. the preparation method of anti-corrosion reinforcing bar according to claim 1, which is characterized in that in the step S2, by quality hundred
Divide than meter, the addition of lateritic nickel ore is 24.04%~44.03%, and the addition of copper ashes is 26.12%~39.81%, coal dust
Addition for 7.99%~16.50%, the addition of calcium hydroxide flux is 3.90%~29.86%, syrup additive plus
It is 4.76% to enter amount.
6. the preparation method of anti-corrosion reinforcing bar according to claim 1, which is characterized in that in the step S4, the nickel chromium triangle
The mass percent of the component of copper-iron alloy for Ni 0.80~2.22%, Cr 0.80~2.00%, Cu 0.85~1.90%,
TFe 92.00~94.50%, C 1.25~1.60%, surplus are other.
7. the preparation method of anti-corrosion reinforcing bar according to claim 1, which is characterized in that described in steel in the step S5
Above-mentioned nickel chromium triangle copper-iron alloy is added in water tapping process to include the following steps：When tap 1/10 (mass ratio) when, add in 1/3 (matter
Measure ratio) deoxidier；When tap 1/4 (mass ratio) when, silicon carbide, silicomangan, carburant, silicon are sequentially added into molten steel
Iron, remaining deoxidier, nickel chromium triangle copper-iron alloy, fluorite and lime.
8. the preparation method of anti-corrosion reinforcing bar according to claim 1, which is characterized in that in the step S5, the hot rolling
Start rolling temperature >=950 DEG C；Finishing temperature >=850 DEG C.
9. the preparation method of anti-corrosion reinforcing bar according to claim 8, which is characterized in that after the continuous casting, before hot rolling
Further include following steps：The strand that continuous casting obtains is heated, heating temperature is 1050 ± 10 DEG C, heating time for 60~
90min。
10. a kind of anti-corrosion reinforcing bar, which is characterized in that the anti-corrosion reinforcing bar uses preparation as described in any one of claim 1 to 9
Method is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711478148.6A CN108193123B (en) | 2017-12-29 | 2017-12-29 | Corrosion-resistant steel bar and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711478148.6A CN108193123B (en) | 2017-12-29 | 2017-12-29 | Corrosion-resistant steel bar and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108193123A true CN108193123A (en) | 2018-06-22 |
| CN108193123B CN108193123B (en) | 2019-12-24 |
Family
ID=62586571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711478148.6A Active CN108193123B (en) | 2017-12-29 | 2017-12-29 | Corrosion-resistant steel bar and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108193123B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106347A (en) * | 2019-05-15 | 2019-08-09 | 中南大学 | A kind of Copper making waste residue is applied to the processing method of sintering |
| CN110983188A (en) * | 2019-12-26 | 2020-04-10 | 福建三宝钢铁有限公司 | Marine atmosphere corrosion resistant steel bar and production process thereof |
| CN112391572A (en) * | 2020-11-05 | 2021-02-23 | 福建三宝钢铁有限公司 | Preparation process of Cu-Cr corrosion-resistant reinforcing steel bar |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709434A (en) * | 2009-12-23 | 2010-05-19 | 钢铁研究总院 | Cl- corrosion resistant high-strength low-alloy steel bar and production method thereof |
| CN103866076A (en) * | 2014-04-01 | 2014-06-18 | 重庆大学 | Compact production method of austenitic stainless steel |
| CN104109815A (en) * | 2014-07-28 | 2014-10-22 | 武汉钢铁(集团)公司 | Marine-climate-corrosion-resistant steel bar |
| CN107034418A (en) * | 2017-06-01 | 2017-08-11 | 马鞍山钢铁股份有限公司 | A kind of concrete 400MPa grades of anti-chlorine ion corrosion high tensile reinforcements and its production method |
| CN107227401A (en) * | 2017-06-20 | 2017-10-03 | 中南大学 | The method that copper ashes and lateritic nickel ore coreduction prepare cupric, ferronickel powder |
-
2017
- 2017-12-29 CN CN201711478148.6A patent/CN108193123B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709434A (en) * | 2009-12-23 | 2010-05-19 | 钢铁研究总院 | Cl- corrosion resistant high-strength low-alloy steel bar and production method thereof |
| CN103866076A (en) * | 2014-04-01 | 2014-06-18 | 重庆大学 | Compact production method of austenitic stainless steel |
| CN104109815A (en) * | 2014-07-28 | 2014-10-22 | 武汉钢铁(集团)公司 | Marine-climate-corrosion-resistant steel bar |
| CN107034418A (en) * | 2017-06-01 | 2017-08-11 | 马鞍山钢铁股份有限公司 | A kind of concrete 400MPa grades of anti-chlorine ion corrosion high tensile reinforcements and its production method |
| CN107227401A (en) * | 2017-06-20 | 2017-10-03 | 中南大学 | The method that copper ashes and lateritic nickel ore coreduction prepare cupric, ferronickel powder |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106347A (en) * | 2019-05-15 | 2019-08-09 | 中南大学 | A kind of Copper making waste residue is applied to the processing method of sintering |
| CN110983188A (en) * | 2019-12-26 | 2020-04-10 | 福建三宝钢铁有限公司 | Marine atmosphere corrosion resistant steel bar and production process thereof |
| CN110983188B (en) * | 2019-12-26 | 2021-01-29 | 福建三宝钢铁有限公司 | Marine atmosphere corrosion resistant steel bar and production process thereof |
| CN112391572A (en) * | 2020-11-05 | 2021-02-23 | 福建三宝钢铁有限公司 | Preparation process of Cu-Cr corrosion-resistant reinforcing steel bar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108193123B (en) | 2019-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108103405B (en) | A kind of high-strength fireproof anti-seismic steel bar and its low cost preparation method | |
| CN101660020B (en) | Manufacturing method of steel | |
| CN102051530B (en) | 48MnV nitrogenous steel and nitrogen adding process thereof | |
| CN101328555B (en) | Mixing method of high quality low phosphor and sulfur high-alloy steel | |
| CN110952037A (en) | 400MPa hot-rolled refractory steel bar and manufacturing method thereof | |
| CN101921966B (en) | Production method of sulfuric acid dew-point corrosion resistance hot rolled sheet | |
| CN113061805A (en) | 600 MPa-grade corrosion-resistant rare earth reinforcing steel bar and production method thereof | |
| CN106917033A (en) | A kind of preparation method of high-quality 40Cr alloy structures vertical bar round steel | |
| CN108220749B (en) | High-strength reinforcing bar of resistance to marine corrosion of one kind and preparation method thereof | |
| CN101643882A (en) | Clean steel smelting method of anti-S steel oil well pipe | |
| CN102345055A (en) | Weldable fine grain structural steel S355NL/S355NLZ35 steel plate and its production method | |
| CN108193123A (en) | A kind of anti-corrosion reinforcing bar and preparation method thereof | |
| CN108193124B (en) | A kind of high-strength air corrosion-resistant steel muscle and preparation method thereof | |
| CN106987768A (en) | A kind of manufacture method of Low-cost corrosion-resistant spiral | |
| CN102827997A (en) | Calcium carbide ferro-aluminium alloy used for smelting steel, and preparation method thereof | |
| Abd Elkader et al. | Effect of direct reduced iron proportion in metallic charge on technological parameters of EAF steelmaking process | |
| CN114107781A (en) | Method for rolling 635 MPa-grade high-strength steel bars by using billet waste heat in short process | |
| CN102041443A (en) | Low-alloy Q345D-Z25 medium plate and production process thereof | |
| CN109881121A (en) | The high-strength anti-seismic steel bar and its production method and purposes of a kind of anti-chlorine ion corrosion | |
| CN113502434A (en) | Aviation 30CrMnSiNi2A high-strength steel and production method thereof | |
| CN106498116B (en) | A kind of production technology of circle chain of mine steel | |
| CN114959487A (en) | Low-hydrogen low-nitrogen high-strength steel and smelting process thereof | |
| CN102296235B (en) | Hot rolled steel plate, production device of hot rolled steel plate, and production method for hot rolled steel plate | |
| CN101775531B (en) | Nickel-molybdenum-copper alloy and preparation method thereof | |
| CN108715972A (en) | A kind of low-phosphorous silicon iron product and its smelting process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |