CN111020105A - Utilization method of vanadium-containing iron block - Google Patents
Utilization method of vanadium-containing iron block Download PDFInfo
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- CN111020105A CN111020105A CN201911276701.7A CN201911276701A CN111020105A CN 111020105 A CN111020105 A CN 111020105A CN 201911276701 A CN201911276701 A CN 201911276701A CN 111020105 A CN111020105 A CN 111020105A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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Abstract
The invention discloses a utilization method of vanadium-containing iron blocks, which adds the vanadium-containing iron blocks in the tapping and refining processes, and comprises the following specific process steps: (1) tapping when the end point temperature of the converter is more than or equal to 1650 ℃, blowing argon and stirring in the whole tapping process, controlling the argon blowing strength to be 5-8L/min/t steel, and uniformly adding 10-17 kg of vanadium-containing iron blocks per t of steel into a ladle when tapping reaches 1/5; (2) and controlling the argon blowing strength to be 5-8L/min/t steel in refining, adding 10-17 kg of vanadium-containing iron blocks per t of steel when the temperature is more than or equal to 1580 ℃, stirring for 3-5 min at a large argon amount of 5-8L/min/t after adding the vanadium-containing iron blocks, and then carrying out next refining operation. The vanadium-containing iron block is directly added into molten steel to realize deoxidation and alloying, so that the elements in the iron block can be efficiently utilized, and compared with the traditional mode of adding the vanadium-containing iron block into a converter, the vanadium-containing iron block can obviously increase the steel yield and reduce the production cost.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a utilization method of vanadium-containing iron blocks.
Background
Vanadium is widely applied to steel-making production as a rare element at present, and particularly vanadium alloy is generally adopted for microalloying in the production process of steel bars of III grade and above. The method for obtaining the vanadium alloy basically comprises the following steps: vanadium-containing molten iron is obtained by smelting vanadium-titanium magnetite in a blast furnace, vanadium is extracted from the vanadium-containing molten iron in a converter to obtain vanadium slag, the vanadium slag is subjected to a series of treatments to obtain vanadium products such as flaky V2O5 and vanadium alloy, and the vanadium products are applied to steel making and related fields.
In order to reduce the alloying cost, metallurgical enterprises are also continuously exploring to use other vanadium-containing materials and modes to replace precious vanadium alloy for alloying: patent CN201210356701 discloses a process for alloying and vanadium-increasing in a converter by using flaky V2O 5; patent CN201110254856 discloses a smelting process for producing III-grade hot-rolled twisted steel by using vanadium-containing molten iron and vanadium slag; patent CN2011100000154 discloses a method for producing microalloy steel by using rare elements in molten iron. The above technologies mainly use vanadium oxide and liquid vanadium-containing molten iron to replace vanadium alloy for alloying, but the above technologies also have a certain problem, for example, the use of vanadium oxide needs to increase the consumption of deoxidizer and reducer, some other alloy elements will be lost in the alloying process, the use of liquid vanadium-containing molten iron needs to increase corresponding equipment and facilities to implement the process, the investment is large, the obtaining of vanadium-containing molten iron needs to be matched with blast furnace smelting vanadium-titanium ore, the obtaining of vanadium-containing molten iron is not available in ordinary iron smelting enterprises, the obtaining of raw materials is limited, the difficulty of molten iron heat preservation is also large, the existing vanadium-containing iron block is obtained by enterprises through external purchase, the adding mode is only used as cold material of vanadium extraction converter, the vanadium extraction converter is affected by molten iron temperature and smelting period after adding the vanadium-containing (about 0.667%) iron block, the vanadium-containing iron block can not be fully melted in the converter to achieve the purpose of increasing vanadium slag yield, greatly causes the loss of vanadium element.
Based on the above problems, a new vanadium-containing material and a new way for alloying need to be explored to improve the yield of vanadium element and reduce the production cost.
Disclosure of Invention
The invention aims to solve the technical problem of providing a utilization method of vanadium-containing iron blocks. The method changes the traditional utilization mode of generally using the vanadium-containing iron block as a cooling agent for extracting vanadium from the converter or steelmaking, and further utilizes the vanadium-containing iron block in the tapping process and the refining process of the converter, thereby achieving the purposes of deoxidizing, alloying, increasing vanadium, increasing steel yield, improving the yield of vanadium elements and reducing production cost.
In order to solve the technical problems, the invention adopts the technical scheme that: a utilization method of vanadium-containing iron blocks is characterized in that vanadium-containing iron blocks are added in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping when the end point temperature of the converter is more than or equal to 1650 ℃, blowing argon for stirring in the whole tapping process, controlling the argon blowing strength to be 5-8L/min/t steel, uniformly adding 10-17 kg/t vanadium-containing iron blocks into a ladle when the tapping reaches 1/5, strictly keeping the vanadium-containing iron blocks from being added to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when the tapping reaches 1/4 so as to meet the requirements of other components of molten steel;
(2) adding vanadium-containing iron blocks in the refining process: and controlling argon blowing strength in the refining range of 5-8L/min/t steel, adding 10-17 kg of vanadium-containing iron blocks per t of steel when the temperature is more than or equal to 1580 ℃, stirring for 3-5 min at the large argon amount of 5-8L/min/t steel after adding the vanadium-containing iron blocks, and then carrying out the next refining operation.
The technical indexes of the vanadium-containing iron block are as follows: less than or equal to 0.07 percent of S, less than or equal to 0.150 percent of P, more than or equal to 0.35 percent of V, less than or equal to 0.35 percent of Si, less than or equal to 0.30 percent of Ti, C: 3.80-4.60% and the balance of Fe and other impurities; the specification of the vanadium-containing iron block is 2-40 kg per block.
The molten steel produced by the method of the invention is sampled and analyzed: the vanadium content is 0.013-0.022%, and the carbon content is 0.076-0.156%.
The yield of the vanadium element in the method is 95-99%.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: 1. the vanadium-containing iron block is solid, is easy to store, transport and obtain, is convenient to add, and is easy to control the adding amount; the elements in the iron block are basically simple substance elements, the yield of the elements in the alloying process is high, the C, Si elements in the iron block can also play a role in pre-deoxidation when the iron block is added in the tapping process, and the yield of other alloy elements such as V, Mn and the like can be improved. 2. The vanadium-containing iron block is directly added into molten steel, the vanadium-containing iron block is melted through the temperature of the molten steel, vanadium elements are dissolved into the molten steel, the purpose of vanadium increase is achieved, the absorption rate of the vanadium-containing iron block is higher compared with the case that the vanadium-containing iron block is added into a converter, other elements in the iron block can be efficiently utilized, and the steel yield can be remarkably increased and the production cost can be reduced compared with the case that the vanadium-containing iron block is added into the converter in the traditional mode. 3. Compared with the method for increasing vanadium in molten iron, the method reduces the heat preservation requirement of the molten iron, does not need to increase new equipment, and is more suitable for field production in a storage and adding mode. 4. The utilization method of the vanadium-containing iron block disclosed by the invention has the advantages that the vanadium content is increased by 0.013-0.022%, the C content is increased by 0.076-0.156%, and the yield of vanadium elements is 95-99%.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which take a 120-ton steel converter as an example and the steel output of the converter is 120 tons.
Example 1
The method for utilizing the vanadium-containing iron block adopts the step of adding the vanadium-containing iron block in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping at 1650 ℃ of the end temperature of the converter, blowing argon and stirring in the whole tapping process, controlling the argon blowing strength at 6L/min/t steel, uniformly adding 15 kg/t steel into a ladle when the tapping reaches 1/5, strictly prohibiting the vanadium-containing iron blocks from being added to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when the tapping reaches 1/4;
(2) adding vanadium-containing iron blocks in the refining process: and controlling the argon blowing strength in refining at 7L/min/t steel, adding 16 kg/t of vanadium-containing iron blocks at 1600 ℃, stirring for 3min at 6L/min/t of steel with large argon gas amount after adding the vanadium-containing iron blocks, and then carrying out the next refining operation.
The technical indexes of the vanadium-containing iron block in the embodiment are as follows: s: 0.05%, P: 0.100%, V: 0.660%, Si: 0.30%, Ti: 0.20%, C: 4.5 percent, and the balance of Fe and other impurities; the vanadium containing iron nuggets were rated at 10 kg per nugget.
The molten steel produced by the utilization method of the vanadium-containing iron block of the embodiment is sampled and analyzed: the vanadium content is 0.0198%, and the carbon content is 0.14%; the yield of the vanadium element is 98%.
The vanadium-containing iron block is directly added into molten steel, so that the elements in the iron block can be efficiently utilized, the steel yield can be remarkably increased by 3.682 tons compared with the traditional method of adding the vanadium-containing iron block into a converter, and the production cost is reduced.
Example 2
The method for utilizing the vanadium-containing iron block adopts the step of adding the vanadium-containing iron block in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping at 1670 ℃ of the end point temperature of the converter, blowing argon and stirring in the whole tapping process, controlling the argon blowing strength at 7L/min/t of steel, uniformly adding 15 kg/t of vanadium-containing iron blocks into a ladle when the tapping reaches 1/5, strictly prohibiting adding the vanadium-containing iron blocks to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when the tapping reaches 1/4;
(2) adding vanadium-containing iron blocks in the refining process: and controlling the argon blowing strength in refining at 6L/min/t steel, adding 15 kg of vanadium-containing iron blocks per t steel at the temperature of 1590 ℃, stirring for 4min at the large argon amount of 5.5L/min/t steel after adding the vanadium-containing iron blocks, and then carrying out the next refining operation.
The technical indexes of the vanadium-containing iron block in the embodiment are as follows: s: 0.06%, P: 0.120%, V: 0.364%, Si: 0.32%, Ti: 0.25%, C: 4.16 percent, and the balance of Fe and other impurities; the specification of the vanadium containing iron block was 30 kg per block.
The molten steel produced by the utilization method of the vanadium-containing iron block of the embodiment is sampled and analyzed: vanadium increasing is 0.019%, and carbon increasing is 0.126%; the yield of the vanadium element is 98%.
The vanadium-containing iron block is directly added into molten steel, so that elements in the iron block can be efficiently utilized, the steel yield can be remarkably increased by 3.52 tons compared with a traditional mode of adding the vanadium-containing iron block into a converter, and the production cost is reduced.
Example 3
The method for utilizing the vanadium-containing iron block adopts the step of adding the vanadium-containing iron block in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping at the end temperature of the converter of 1700 ℃, blowing argon and stirring in the whole tapping process, controlling the argon blowing strength at 7.5L/min/t steel, uniformly adding 12 kg/t steel with vanadium-containing iron blocks into a ladle when the steel is tapped to 1/5, strictly prohibiting adding the vanadium-containing iron blocks to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when the steel is tapped to 1/4;
(2) adding vanadium-containing iron blocks in the refining process: and controlling argon blowing strength in refining at 6.5L/min/t steel, adding 17 kg of vanadium-containing iron blocks at 1620 ℃, stirring for 3min at 6L/min/t steel high argon gas content after adding the vanadium-containing iron blocks, and then carrying out next refining operation.
The technical indexes of the vanadium-containing iron block in the embodiment are as follows: s: 0.055%, P: 0.140%, V: 0.606%, Si: 0.34%, Ti: 0.28%, C: 4.20 percent, and the balance of Fe and other impurities; the specification of the vanadium containing iron block was 20 kg per block.
The molten steel produced by the utilization method of the vanadium-containing iron block of the embodiment is sampled and analyzed: vanadium increasing is 0.0187%, and carbon increasing is 0.12%; the yield of vanadium element was 97%.
The vanadium-containing iron block is directly added into molten steel, so that elements in the iron block can be efficiently utilized, the steel yield can be remarkably increased by 3.56 tons compared with the traditional mode of adding the vanadium-containing iron block into a converter, and the production cost is reduced.
Example 4
The method for utilizing the vanadium-containing iron block adopts the step of adding the vanadium-containing iron block in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping at the end point temperature of the converter of 1680 ℃, blowing argon for stirring in the whole tapping process, controlling the argon blowing strength at 6.5L/min/t steel, uniformly adding 10 kg/t steel of vanadium-containing iron blocks into a ladle when tapping reaches 1/5, strictly prohibiting adding the vanadium-containing iron blocks to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when tapping reaches 1/4;
(2) adding vanadium-containing iron blocks in the refining process: and controlling argon blowing intensity in refining at 7.5L/min/t steel, adding 12 kg of vanadium-containing iron blocks at 1610 ℃, stirring for 4min at the large argon amount of 5L/min/t steel after adding the vanadium-containing iron blocks, and then carrying out next refining operation.
The technical indexes of the vanadium-containing iron block in the embodiment are as follows: s: 0.065%, P: 0.130%, V: 0.558%, Si: 0.31%, Ti: 0.26%, C: 4.32 percent, and the balance of Fe and other impurities; the specification of the vanadium-containing iron block was 5 kg per block.
The molten steel produced by the utilization method of the vanadium-containing iron block of the embodiment is sampled and analyzed: vanadium increase is 0.014%, and carbon increase is 0.095%; the yield of vanadium element was 97%.
The vanadium-containing iron block is directly added into molten steel, so that elements in the iron block can be efficiently utilized, the steel yield can be remarkably increased by 2.65 tons compared with the traditional mode of adding the vanadium-containing iron block into a converter, and the production cost is reduced.
Example 5
The method for utilizing the vanadium-containing iron block adopts the step of adding the vanadium-containing iron block in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping at the end point temperature of the converter of 1655 ℃, blowing argon and stirring in the whole tapping process, controlling the argon blowing strength at 5.5L/min/t steel, uniformly adding 14.5 kg/t steel with vanadium-containing iron blocks into a ladle when tapping reaches 1/5, strictly prohibiting adding the vanadium-containing iron blocks to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when tapping reaches 1/4;
(2) adding vanadium-containing iron blocks in the refining process: and controlling the argon blowing strength in refining at 5.5L/min/t steel, adding 14 kg of vanadium-containing iron blocks at 1630 ℃, stirring for 3.5min at the large argon gas amount of 7L/min/t steel after adding the vanadium-containing iron blocks, and then carrying out the next refining operation.
The technical indexes of the vanadium-containing iron block in the embodiment are as follows: s: 0.052%, P: 0.126%, V: 0.662%, Si: 0.33%, Ti: 0.27%, C: 3.81 percent, and the balance of Fe and other impurities; the specification of the vanadium containing iron was 28 kg/block.
The molten steel produced by the utilization method of the vanadium-containing iron block of the embodiment is sampled and analyzed: vanadium increasing is 0.0188 percent, and carbon increasing is 0.124 percent; the yield of the vanadium element is 98%.
The vanadium-containing iron block is directly added into molten steel, so that elements in the iron block can be efficiently utilized, the steel yield can be remarkably increased by 3.46 tons compared with the traditional mode of adding the vanadium-containing iron block into a converter, and the production cost is reduced.
Example 6
The method for utilizing the vanadium-containing iron block adopts the step of adding the vanadium-containing iron block in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping at 1660 ℃ of the final temperature of the converter, blowing argon and stirring in the whole tapping process, controlling the argon blowing strength to be 7.2L/min/t of steel, uniformly adding 16 kg/t of vanadium-containing iron blocks into a ladle when tapping reaches 1/5, strictly prohibiting adding the vanadium-containing iron blocks to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when tapping reaches 1/4;
(2) adding vanadium-containing iron blocks in the refining process: and controlling argon blowing intensity in refining at 6.6L/min/t steel, adding 13 kg of vanadium-containing iron blocks at 1625 ℃, stirring for 4min at the large argon gas amount of 8L/min/t steel after adding the vanadium-containing iron blocks, and then carrying out next refining operation.
The technical indexes of the vanadium-containing iron block in the embodiment are as follows: s: 0.063%, P: 0.137%, V: 0.653%, Si: 0.32%, Ti: 0.29%, C: 3.99 percent, and the balance of Fe and other impurities; the specification of the vanadium containing iron block was 16 kg per block.
The molten steel produced by the utilization method of the vanadium-containing iron block of the embodiment is sampled and analyzed: vanadium increasing is 0.020%, and carbon increasing is 0.129%; the yield of vanadium element was 97%.
The vanadium-containing iron block is directly added into molten steel, so that elements in the iron block can be efficiently utilized, the steel yield can be remarkably increased by 3.82 tons compared with the traditional mode of adding the vanadium-containing iron block into a converter, and the production cost is reduced.
Example 7
The method for utilizing the vanadium-containing iron block adopts the step of adding the vanadium-containing iron block in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping at the end temperature of the converter of 1690 ℃, blowing argon and stirring in the whole tapping process, controlling the argon blowing strength at 5L/min/t steel, uniformly adding 14 kg/t steel of vanadium-containing iron blocks into a ladle when the steel is tapped to 1/5, strictly prohibiting adding the vanadium-containing iron blocks to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when the steel is tapped to 1/4;
(2) adding vanadium-containing iron blocks in the refining process: and controlling argon blowing strength in refining at 8L/min/t steel, adding 16.5 kg of vanadium-containing iron blocks per t of steel at 1605 ℃, stirring for 4.5min at 6L/min/t steel large argon gas amount after adding the vanadium-containing iron blocks, and then carrying out next refining operation.
The technical indexes of the vanadium-containing iron block in the embodiment are as follows: s: 0.058%, P: 0.143%, V: 0.456%, Si: 0.35%, Ti: 0.30%, C: 4.33 percent, and the balance of Fe and other impurities; the specification of the vanadium containing iron block was 2 kg per block.
The molten steel produced by the utilization method of the vanadium-containing iron block of the embodiment is sampled and analyzed: vanadium increasing is 0.019%, and carbon increasing is 0.156%; the yield of the vanadium element is 98%.
The vanadium-containing iron block is directly added into molten steel, so that elements in the iron block can be efficiently utilized, the steel yield can be remarkably increased by 3.60 tons compared with the traditional mode of adding the vanadium-containing iron block into a converter, and the production cost is reduced.
Example 8
The method for utilizing the vanadium-containing iron block adopts the step of adding the vanadium-containing iron block in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping at 1675 ℃ of the end point temperature of the converter, blowing argon and stirring in the whole tapping process, controlling the argon blowing strength at 8L/min/t of steel, uniformly adding 17 kg/t of vanadium-containing iron blocks into a ladle when the tapping reaches 1/5, strictly prohibiting adding the vanadium-containing iron blocks to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when the tapping reaches 1/4;
(2) adding vanadium-containing iron blocks in the refining process: and refining, controlling the argon blowing strength at 5L/min/t steel, adding 10 kg of vanadium-containing iron blocks at the temperature of 1580 ℃, stirring for 5min at the large argon amount of 7L/min/t steel after adding the vanadium-containing iron blocks, and then carrying out next refining operation.
The technical indexes of the vanadium-containing iron block in the embodiment are as follows: s: 0.070%, P: 0.150%, V: 0.666%, Si: 0.29%, Ti: 0.23%, C: 4.60 percent, and the balance of Fe and other impurities; the specification of the vanadium containing iron block was 40 kg per block.
The molten steel produced by the utilization method of the vanadium-containing iron block of the embodiment is sampled and analyzed: vanadium increasing is 0.0218%, and carbon increasing is 0.13%; the yield of vanadium element was 99%.
The vanadium-containing iron block is directly added into molten steel, so that the elements in the iron block can be efficiently utilized, the steel yield can be remarkably increased by 3.14 tons compared with the traditional mode of adding the vanadium-containing iron block into a converter, and the production cost is reduced.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (4)
1. The utilization method of the vanadium-containing iron block is characterized in that the vanadium-containing iron block is added in the tapping and refining processes, and the specific process steps are as follows:
(1) adding vanadium-containing iron blocks in the tapping process: tapping when the end point temperature of the converter is more than or equal to 1650 ℃, blowing argon for stirring in the whole tapping process, controlling the argon blowing strength to be 5-8L/min/t steel, uniformly adding 10-17 kg/t vanadium-containing iron blocks into a ladle when the tapping reaches 1/5, strictly keeping the vanadium-containing iron blocks from being added to the bottom of the ladle in advance, and beginning to add other alloy materials into the ladle when the tapping reaches 1/4 so as to meet the requirements of other components of molten steel;
(2) adding vanadium-containing iron blocks in the refining process: and controlling argon blowing strength in the refining range of 5-8L/min/t steel, adding 10-17 kg of vanadium-containing iron blocks per t of steel when the temperature is more than or equal to 1580 ℃, stirring for 3-5 min at the large argon amount of 5-8L/min/t steel after adding the vanadium-containing iron blocks, and then carrying out the next refining operation.
2. The method for utilizing vanadium-containing iron blocks as claimed in claim 1, wherein the technical indexes of the vanadium-containing iron blocks are as follows: less than or equal to 0.07 percent of S, less than or equal to 0.150 percent of P, more than or equal to 0.35 percent of V, less than or equal to 0.35 percent of Si, less than or equal to 0.30 percent of Ti, C: 3.80-4.60% and the balance of Fe and other impurities; the specification of the vanadium-containing iron block is 2-40 kg per block.
3. The method for utilizing vanadium-containing iron blocks as claimed in claim 1, wherein the molten steel produced by the method is sampled and analyzed: the vanadium content is 0.013-0.022%, and the carbon content is 0.076-0.156%.
4. The method for utilizing vanadium-containing iron nuggets according to any one of claims 1-3, wherein the yield of vanadium element in the method is 95-99%.
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| CN111979373A (en) * | 2020-07-20 | 2020-11-24 | 河钢股份有限公司承德分公司 | Method for increasing vanadium by microalloying vanadium slag and vanadium-containing iron block |
| CN112080682A (en) * | 2020-09-23 | 2020-12-15 | 宁夏建龙龙祥钢铁有限公司 | Method for increasing vanadium content of molten deformed steel bar by using vanadium-containing titanium-containing pig iron block |
| CN115261561A (en) * | 2022-08-03 | 2022-11-01 | 山东钢铁股份有限公司 | Molten steel vanadium-nitrogen microalloying method |
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| CN111979373A (en) * | 2020-07-20 | 2020-11-24 | 河钢股份有限公司承德分公司 | Method for increasing vanadium by microalloying vanadium slag and vanadium-containing iron block |
| CN112080682A (en) * | 2020-09-23 | 2020-12-15 | 宁夏建龙龙祥钢铁有限公司 | Method for increasing vanadium content of molten deformed steel bar by using vanadium-containing titanium-containing pig iron block |
| CN115261561A (en) * | 2022-08-03 | 2022-11-01 | 山东钢铁股份有限公司 | Molten steel vanadium-nitrogen microalloying method |
| CN115261561B (en) * | 2022-08-03 | 2024-03-01 | 山东钢铁股份有限公司 | Molten steel vanadium-nitrogen microalloying method |
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