CN115786638A - Method for continuously smelting titanium carbide slag - Google Patents
Method for continuously smelting titanium carbide slag Download PDFInfo
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- CN115786638A CN115786638A CN202211476087.0A CN202211476087A CN115786638A CN 115786638 A CN115786638 A CN 115786638A CN 202211476087 A CN202211476087 A CN 202211476087A CN 115786638 A CN115786638 A CN 115786638A
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- 239000002893 slag Substances 0.000 title claims abstract description 113
- 238000003723 Smelting Methods 0.000 title claims abstract description 61
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003763 carbonization Methods 0.000 claims abstract description 44
- 230000009467 reduction Effects 0.000 claims abstract description 37
- 239000010936 titanium Substances 0.000 claims abstract description 30
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 28
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 238000007664 blowing Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000011946 reduction process Methods 0.000 claims abstract description 6
- 238000006722 reduction reaction Methods 0.000 claims description 35
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 15
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 4
- 239000003830 anthracite Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000011819 refractory material Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 235000013980 iron oxide Nutrition 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 241000510672 Cuminum Species 0.000 description 1
- 235000007129 Cuminum cyminum Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a method for continuously smelting titanium carbide slag, which comprises the following steps: s1, adding thermal high-titanium blast furnace slag and a carbonaceous reducing agent into a pre-reduction furnace through blowing, and heating to T 1 Smelting t 1 Forming a first slag; s2, adding a carbonaceous reducing agent and first molten slag into a carbonization electric furnace for smelting through blowing, and heating to T 2 Smelting t 2 Then, titanium carbide slag is obtained after reduction; s3, when the first slag is added into the electric carbonization furnace, the pre-reduction furnace continues to perform the next hot slag charging and pre-reduction processes to obtain second slag; and S4, continuously adding the second slag into a carbonization electric furnace for smelting. During the power transmission smelting period of the carbonization electric furnace, the pre-reduction furnace continues to perform the next stepIn the secondary hot slag charging and pre-reducing process, after slag discharging of the carbide furnace is finished, slag is added into the carbide furnace again through the pre-reducing furnace immediately, and power transmission smelting is continued, so that the long service life of the lining of the electric carbide furnace is facilitated, and the smelting efficiency, the yield and the economic benefit are improved.
Description
Technical Field
The invention relates to the technical field of smelting, in particular to a method for continuously smelting titanium carbide slag.
Background
Panxi titanium is abundant in resources and mainly exists in vanadium titano-magnetite. Through the traditional blast furnace iron-making-converter steel-making process of the vanadium titano-magnetite, most of titanium resources enter blast furnace slag, and TiO in the blast furnace slag 2 The content is 20 to 26 percent, and the high titanium blast furnace slag is called high titanium blast furnace slag. In order to realize the recycling of titanium resources in high-titanium blast furnace slag, steel climbing group is finally focused on research of 'preparation of carbide slag by high-temperature carbonization of high-titanium blast furnace slag-preparation of TiCl by low-temperature chlorination' through inexorable exploration of cumin for decades 4 The process realizes the large-scale utilization of the high titanium blast furnace slag.
The main principle of preparing carbide slag by high-temperature carbonization of the high-titanium blast furnace slag is that the high-titanium blast furnace slag is used as a raw material, anthracite, coke or semi-coke serving as a solid reducing agent is used as a reducing agent, and smelting is carried out at the high temperature of 1300-1700 ℃, and the product is the titanium carbide slag. The smelting main reaction comprises the following steps:
TiO 2 +2C＝TiC+2CO 2TiO 2 +C＝Ti 2 O 3 +CO FeO+C＝Fe+CO
at present, the titanium carbide slag smelting process is basically an intermittent smelting process, the intermittent smelting can cause frequent temperature rise of refractory materials of an electric furnace, the service life of the refractory materials is not prolonged, meanwhile, the intermittent smelting rhythm is slow, and the smelting efficiency and the yield are low. In view of the above, the prior art should be improved to solve the above technical problems in the prior art.
Disclosure of Invention
The invention mainly aims to provide a method for continuously smelting titanium carbide slag, which reduces iron oxides in high-titanium blast furnace slag into metallic iron and partial TiO in a pre-reduction furnace 2 Reducing the slag into titanium suboxide, and then adding the pre-reduced hot blast furnace slag into a carbonization electric furnace through a chuteThe pre-reduced high titanium blast furnace slag is smelted into titanium carbide slag, so that the long service life of the lining of the carbonization electric furnace is facilitated, and the smelting efficiency, the yield and the economic benefit are improved.
According to one aspect of the invention, the invention provides a smelting method of titanium carbide slag, which comprises the following steps:
s1, adding thermal high-titanium blast furnace slag and a carbonaceous reducing agent into a pre-reduction furnace through blowing, and heating to T 1 Smelting of t 1 Forming a first slag;
s2, adding a carbonaceous reducing agent and the first slag into a carbonization electric furnace for smelting through blowing, and heating to T 2 Smelting t 2 Then, titanium carbide slag is obtained after reduction;
s3, when the first slag is added into the electric carbonization furnace, the pre-reduction furnace continues to perform the next hot slag charging and pre-reduction processes to obtain second slag;
and S4, continuously adding the second slag into a carbonization electric furnace for smelting.
According to one embodiment of the invention, said T 1 The temperature interval of (a) is 1300-1400 ℃, and t is 1 The time interval of (2) is 30-60 min.
According to one embodiment of the invention, said T 2 The temperature interval of (a) is 1600-1700 ℃, t is 2 The time interval of (2) is 60-90 min.
According to one embodiment of the invention, the carbonaceous reducing agent is one or a mixture of coke powder, anthracite or semi coke.
According to one embodiment of the invention, the carbonaceous reducing agent is added into the pre-reducing furnace in a proportion of 3% -10% of the amount of the charged slag, and the carbonaceous reducing agent is added into the electric carbonization furnace in a proportion of 5% -15% of the amount of the charged slag.
According to one embodiment of the invention, the first and second slags are flowed from the pre-reduction furnace through a chute into the carbonizer.
According to one embodiment of the invention, the pre-reduction furnace is provided as at least one, and the pre-reduction furnace and the electric carbonization furnace are both three-phase circular alternating current furnaces.
According to one embodiment of the invention, the pre-reduction furnace has a power rating of 5-20MVA and the electric carbonization furnace has a power rating of 15-25MVA.
According to one embodiment of the invention, the TiO in the high titanium type blast furnace slag 2 The content is 15-40%.
According to one embodiment of the invention, the conversion of titanium dioxide to titanium carbide in the slag after the reduction reaction is completed is 70-90%.
In a method for continuously smelting titanium carbide slag according to an embodiment of the present invention, iron oxide in high titanium type blast furnace slag is reduced to metallic iron, and part of TiO is reduced in a pre-reduction furnace 2 Reduction to Ti 2 O 3 And then adding the pre-reduced thermal-state blast furnace slag into a carbonization electric furnace through a chute, and smelting the pre-reduced high-titanium blast furnace slag into titanium carbide slag. The method can realize continuous smelting of the titanium carbide slag, avoids frequent temperature rise of refractory materials of the electric carbonization furnace, is beneficial to realizing long service life of the lining of the electric carbonization furnace, improves smelting efficiency, yield and economic benefit, and has higher popularization and application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some implementation examples of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 shows a process flow diagram of a method of continuously smelting titanium carbide slag in accordance with an exemplary embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
As shown in figure 1, the method for continuously smelting the titanium carbide slag comprises the following steps:
s1, adding thermal high-titanium blast furnace slag and a carbonaceous reducing agent into a pre-reduction furnace through blowing, and heating to T 1 Smelting t 1 Forming a first slag;
s2, adding a carbonaceous reducing agent and the first slag into a carbonization electric furnace for smelting through blowing, and heating to T 2 Smelting t 2 Then, reducing to obtain titanium carbide slag;
s3, when the first slag is added into the electric carbonization furnace, the pre-reduction furnace continues to perform the next hot slag charging and pre-reduction processes to obtain second slag;
and S4, continuously adding the second molten slag into the carbonization electric furnace for smelting.
In the method for continuously smelting titanium carbide slag according to the embodiment of the invention, raw materials are added into a pre-reduction furnace, the main raw materials are thermal high-titanium blast furnace slag and a carbonaceous reducing agent, and the high-titanium blast furnace slag is TiO 2 The content is 15-40%.
In step S1, iron oxide in the high titanium blast furnace slag is reduced into metallic iron and partial TiO in a pre-reduction furnace 2 Reducing to titanium suboxides to form a first slag.
The T is 1 The temperature interval of (a) is 1300-1400 ℃, and t is 1 The time interval of (2) is 30-60 min.
And S2, adding the pre-reduced thermal-state blast furnace slag into a carbonization electric furnace through a chute, and smelting the pre-reduced high-titanium blast furnace slag into titanium carbide slag.
The T is 2 The temperature interval of (a) is 1600-1700 ℃, t is 2 The time interval of (2) is 60-90 min.
The outer part of the electric carbonization furnace is connected with a chute, the chute is a groove which is used for transporting objects from a high position to a low position on the ground, the inner surface of the chute is smooth, and the hot blast furnace slag on the top of the groove can automatically slide down.
And S3, adding the pre-reduced thermal-state blast furnace slag into the electric carbonization furnace through the chute in the step S2, and simultaneously continuing the next hot slag charging and pre-reduction process by the pre-reduction furnace to obtain second molten slag, so that the pre-reduction furnace and the electric carbonization furnace are ensured to be in working states, and a second hot furnace process is not needed.
And S4, continuously adding the second molten slag into the carbonization electric furnace for smelting.
In the subsequent smelting process, the step S3 and the step S4 are continuously repeated, so that the pre-reduction furnace and the electric carbonization furnace are always in a working state, the frequent temperature rise of refractory materials caused by frequent furnace switching due to intermittent smelting is avoided, and the service life of the lining of the electric carbonization furnace is favorably prolonged.
The carbonaceous reducing agent is one or a mixture of more of coke powder, anthracite or semi-coke, the reducing agents of the pre-reduction furnace and the electric carbonization furnace are added in a blowing mode, and the carrier gas is N 2 。
The adding proportion of the carbonaceous reducing agent in the pre-reducing furnace is 3-10% of the amount of the slag, and the adding proportion of the carbonaceous reducing agent in the electric carbonization furnace is 5-15% of the amount of the slag.
The pre-reduction furnace is set to be at least one, and a plurality of pre-reduction furnaces can be set according to actual needs. The pre-reduction furnace and the carbonization furnace are both three-phase circular alternating current electric furnaces. The rated power of the pre-reduction furnace is 5-20MVA, and the rated power of the electric carbonization furnace is 15-25MVA.
Example 1
The number of the pre-reduction furnaces is 1, the rated power is 10MVA, and the rated power of the electric carbonization furnace is 20MVA. Thermal high titanium blast furnace slag (TiO) 2 21.30 percent) is transported to a production operation area by a slag tanker through a railway, then the hot high titanium blast furnace slag is broken by a heavy hammer and added into a pre-reducing furnace through a chute, and passes through ironAnd weighing the weight of the empty tank and the weight of the full tank by the road weighing device, wherein the difference value is the amount of the slag added into the pre-reduction furnace, and the obtained amount of the slag in the pre-reduction furnace is 30t. Then adding 1.5t of coke powder into the prereduction furnace through a spray gun, controlling the temperature to be 1300-1400 ℃, smelting for about 50min, then adding 30t of pre-reduced slag into the carbonization electric furnace through a chute, then adding 3t of coke powder through the spray gun, controlling the temperature to be 1600-1700 ℃, smelting for about 90min, tapping at a team opening, and obtaining 13.04% of TiC content in the slag and 13.04% of TiO in the slag through sampling chemical analysis 2 The conversion to TiC was 81.63%.
During the power transmission smelting of the electric carbonization furnace, the pre-reduction furnace continues to perform the next hot slag charging and pre-reduction process, and after slag discharge of the electric carbonization furnace is finished, slag is added into the electric carbonization furnace again by the pre-reduction furnace immediately, and power transmission smelting is continued, so that the production process is continuously performed, continuous and efficient smelting of a large electric carbonization furnace is realized, the long service life of the lining of the electric carbonization furnace is favorably realized, and the smelting efficiency, the yield and the economic benefit are improved.
The above is an exemplary embodiment of the present disclosure, and the order of the disclosure of the embodiment of the present disclosure is only for description, and does not represent advantages and disadvantages of the embodiment. It should be noted that the discussion of any embodiment above is exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to those examples, and that various changes and modifications may be made without departing from the scope, as defined in the claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the framework of embodiments of the invention, also combinations between technical features of the above embodiments or different embodiments are possible, and there are many other variations of the different aspects of the embodiments of the invention described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit or scope of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. The method for continuously smelting the titanium carbide slag is characterized by comprising the following steps of:
s1, adding thermal high-titanium blast furnace slag and a carbonaceous reducing agent into a pre-reduction furnace through blowing, and heating to T 1 Smelting t 1 Forming a first slag;
s2, adding a carbonaceous reducing agent and the first slag into a carbonization electric furnace for smelting through blowing, and heating to T 2 Smelting of t 2 Then, reducing to obtain titanium carbide slag;
s3, when the first slag is added into the electric carbonization furnace, the pre-reduction furnace continues to perform the next hot slag charging and pre-reduction processes to obtain second slag;
and S4, continuously adding the second molten slag into the carbonization electric furnace for smelting.
2. The method for continuously smelting titanium carbide slag according to claim 1, wherein T is 1 The temperature interval of (a) is 1300-1400 ℃, and t is 1 The time interval of (2) is 30-60 min.
3. The method for continuously smelting titanium carbide slag according to claim 1, wherein T is 2 The temperature interval of (a) is 1600-1700 ℃, t is 2 The time interval of (2) is 60-90 min.
4. The method for continuously smelting titanium carbide slag according to claim 3, wherein the carbonaceous reducing agent is one or a mixture of coke powder, anthracite and semi-coke.
5. The method for continuously smelting titanium carbide slag according to claim 1, wherein the carbonaceous reducing agent is added to the pre-reducing furnace in a proportion of 3 to 10% of the amount of the charged slag, and the carbonaceous reducing agent is added to the electric carbonization furnace in a proportion of 5 to 15% of the amount of the charged slag.
6. The method for continuously smelting titanium carbide slag according to claim 1, wherein the first molten slag and the second molten slag flow from the pre-reduction furnace into the carbonization furnace through a chute.
7. The method for continuously smelting titanium carbide slag according to claim 1, wherein the pre-reduction furnace is provided as at least one furnace, and the pre-reduction furnace and the electric carbide furnace are both three-phase circular alternating current furnaces.
8. The method for continuously smelting titanium carbide slag according to claim 7, wherein the rated power of the pre-reduction furnace is 5 to 20MVA, and the rated power of the electric carbonization furnace is 15 to 25MVA.
9. The method for continuously smelting titanium carbide slag according to claim 7, wherein TiO in the high titanium type blast furnace slag 2 The content is 15-40%.
10. The method for continuously smelting titanium carbide slag according to claim 9, wherein the conversion rate of titanium dioxide in the slag into titanium carbide after the reduction reaction is completed is 70-90%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256152A (en) * | 2015-10-28 | 2016-01-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for quick reduction smelting of titaniferous furnace slag |
| CN107663588A (en) * | 2017-10-09 | 2018-02-06 | 攀钢集团研究院有限公司 | A kind of method of melting continuously carbide slag |
| CN108866343A (en) * | 2018-07-17 | 2018-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Two step reduction and carbonization methods of titanium-containing blast furnace slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256152A (en) * | 2015-10-28 | 2016-01-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for quick reduction smelting of titaniferous furnace slag |
| CN107663588A (en) * | 2017-10-09 | 2018-02-06 | 攀钢集团研究院有限公司 | A kind of method of melting continuously carbide slag |
| CN108866343A (en) * | 2018-07-17 | 2018-11-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Two step reduction and carbonization methods of titanium-containing blast furnace slag |
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