CN116287554A - Silicon-calcium aluminum alloy and production process thereof - Google Patents
Silicon-calcium aluminum alloy and production process thereof Download PDFInfo
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- CN116287554A CN116287554A CN202310124555.6A CN202310124555A CN116287554A CN 116287554 A CN116287554 A CN 116287554A CN 202310124555 A CN202310124555 A CN 202310124555A CN 116287554 A CN116287554 A CN 116287554A
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- -1 Silicon-calcium aluminum Chemical compound 0.000 title claims abstract description 63
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 32
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000292 calcium oxide Substances 0.000 claims abstract description 24
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 24
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 4
- 238000006722 reduction reaction Methods 0.000 claims description 30
- 230000009467 reduction Effects 0.000 claims description 25
- 239000000843 powder Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000000047 product Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 238000012958 reprocessing Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 36
- 239000010959 steel Substances 0.000 abstract description 36
- 229910045601 alloy Inorganic materials 0.000 abstract description 18
- 239000000956 alloy Substances 0.000 abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052791 calcium Inorganic materials 0.000 abstract description 7
- 239000011575 calcium Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 4
- 229910000882 Ca alloy Inorganic materials 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 3
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 abstract description 3
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 13
- 238000005266 casting Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000024121 nodulation Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- 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
Abstract
The invention discloses a silicon-calcium aluminum alloy and a production process thereof, and relates to the technical field of silicon-calcium aluminum alloy. The granularity of the silicon-calcium aluminum alloy is 5-50 mm, and the silicon-calcium aluminum alloy comprises the following chemical components: si is more than or equal to 12%, ca is more than or equal to 15%, al is more than or equal to 12%, P is less than or equal to 0.05%, S is less than or equal to 0.08%, and C is less than or equal to 0.05%, and the preparation raw materials of the silicon-calcium-aluminum alloy comprise the following materials in percentage: 25-32% of silica, 34-40% of active calcium oxide, 28-35% of aluminum particles and 1-2% of binding agent. According to the silicon-calcium-aluminum alloy and the production process thereof provided by the invention, the oxygen content in steel can be reduced to the minimum, meanwhile, the formed complex inclusions such as calcium, aluminum and the like are easy to float up from molten steel, the molten steel is purified, the impact toughness and the processing performance of the steel are improved, compared with the use of pure aluminum, silicon iron and silicon-calcium alloy, the silicon-calcium-aluminum alloy is good in effect, high in alloy utilization rate and lower in cost, and compared with the traditional electric furnace method for smelting the alloy, the consumption of electric energy is greatly saved, and the method is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to the technical field of silicon-calcium-aluminum alloy, in particular to a silicon-calcium-aluminum alloy and a production process thereof.
Background
The silicon-calcium aluminum alloy is mainly used for the following functions:
1. used as deoxidizing agent. The steelmaking is to remove carbon, phosphorus and other impurities in molten steel by an oxidation method. After these oxidation tasks are completed, oxygen is also absorbed in the molten steel, which if present in the steel, greatly reduces the performance of the steel. Therefore, some elements which have strong binding force with oxygen and can smoothly remove deoxidized products from the molten steel are required to be added, so that the oxygen content in the molten steel is reduced. This process is called deoxidizing the steel. The element or alloy used for deoxidation is called a deoxidizer. The commonly used deoxidizing agents are manganese, silicon, aluminum, calcium and the like, and the stronger the binding capacity of the elements with oxygen is, the better the deoxidizing effect is.
2. As an alloy. The alloy element can not only reduce the impurity content in the steel, but also adjust the chemical composition of the steel. The elements or alloys used to adjust the chemical composition of the steel to alloy the steel are called alloying agents, and the common alloying elements are silicon, calcium, chromium, aluminum, vanadium, titanium, etc. Steel bells of different alloying elements and different alloying element contents have different properties and uses. The consumption of the alloy is generally about 2 to 3 percent of the steel yield.
3. Used in the foundry industry to improve the foundry process and the performance of castings. One of the measures for changing the properties of cast iron and cast steel is to change the solidification condition of the casting, add some ferroalloy as a crystal nucleus inoculant before casting to form a crystal grain center, so that the formed graphite becomes fine and dispersed, and the crystal grains are refined, thereby improving the properties of the casting.
In order to prevent the continuous casting steel, especially the aluminum-containing steel, from forming a casting nozzle nodulation (sleeve hole), the alloy must be treated by calcium, the behavior of the residual inclusion in the steel can be changed after the silicon-calcium-aluminum alloy is added into the steel in the steelmaking process, the content of the inclusion in the steel is reduced, and the mechanical property of the steel is improved.
Disclosure of Invention
The invention aims to provide a silicon-calcium-aluminum alloy and a production process thereof, wherein the prepared silicon-calcium-aluminum alloy can minimize the oxygen content in steel, and meanwhile, the formed complex inclusions such as calcium, aluminum and the like are easy to float up from molten steel, so that the molten steel is purified, the impact toughness and the processing performance of the steel are improved, and compared with the use of pure aluminum, silicon iron and silicon-calcium alloy, the silicon-calcium-aluminum alloy has good effect, high alloy utilization rate and lower cost, so that the problems in the prior art are solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: the granularity of the silicon-calcium aluminum alloy is 5-50 mm, and the silicon-calcium aluminum alloy comprises the following chemical components: si is more than or equal to 12%, ca is more than or equal to 15%, al is more than or equal to 12%, P is less than or equal to 0.05%, S is less than or equal to 0.08%, and C is less than or equal to 0.05%, and the preparation raw materials of the silicon-calcium-aluminum alloy comprise the following materials in percentage: 25-32% of silica, 34-40% of active calcium oxide, 28-35% of aluminum particles and 1-2% of binding agent, wherein SiO in the silica 2 The content of CaO in the active calcium oxide is more than 85 percent, the content of Al in the aluminum particles is more than 97 percent, and the binding agent comprises a reducing agent, a solvent and a heating agent.
Preferably, al in the silica 2 O 3 And Fe (Fe) 2 O 3 The total content is less than 1%, and the impurity content is less than 1%.
Preferably, the granularity of the silica is 5-20 mm, the part with granularity smaller than 5mm is less than or equal to 5%, and the part with granularity larger than 20mm is less than or equal to 5%.
Preferably, al in the active calcium oxide 2 O 3 The content is less than 0.5 percent, fe 2 O 3 The content is less than 0.3 percent, the S content is less than or equal to 0.05 percent, and the P content is less than or equal to 0.02 percent.
Preferably, the granularity of the active calcium oxide is 10-15 mm, and the granularity of the active calcium oxide is more than or equal to 90% with 200 meshes.
Preferably, the granularity of the aluminum particles is 0.1-10 mm, the impurity content of the aluminum particles is less than 0.5%, and the moisture content is less than 2%.
The invention provides a production process of a silicon-calcium-aluminum alloy, which comprises the following steps:
s1: silica, aluminum particles and active calcium oxide enter a bin after finishing and screening, and enter a mixing bin together with a reducing agent, a flux and a heating agent through a belt conveyor vibrating screen according to a set metering proportion, so that the raw materials are fully mixed in the mixing process, the caking phenomenon is avoided, the belt metering scale is corrected regularly, and the metering accuracy is ensured;
s2: the materials are fully and evenly mixed and then enter a cylinder type reduction reactor to carry out self chemical reduction reaction, and the reaction time of the evenly mixed materials in the cylinder type reduction reactor is strictly controlled;
s3: the reacted materials enter a forming briquetting machine for briquetting, and enter a drying workshop for roasting and hardening after briquetting to prepare a semi-finished product;
s4: the semi-finished product enters a crushing workshop for coarse crushing and fine crushing, and then is subjected to particle size classification;
s5: and (3) packaging the qualified product, returning the powder to a raw material bin for reprocessing, wherein the finished product packaging comprises packaging, detecting and warehousing processes.
Preferably, all raw materials in the step S1 must be carefully selected before entering a storage bin, impurities such as soil and the like cannot be contained on the surface of the silica, and the raw materials and the overburned active calcium oxide cannot be mixed before entering a furnace to remove the impurities in the raw materials.
Preferably, the cylinder type reduction reactor in the step S2 is a semi-closed cylinder type reduction reactor, and the silicon-calcium-aluminum alloy is produced in the reduction reactor by adopting a continuous operation method.
Preferably, the powder produced after the coarse breaking and the fine breaking is uniformly returned to a powder returning bin, and the powder returning bin is connected with a belt conveyor in a vibrating way.
Compared with the prior art, the invention has the beneficial effects that:
1. the silicon-calcium-aluminum alloy prepared by the method can minimize the oxygen content in steel, and meanwhile, the formed complex inclusions such as calcium, aluminum and the like are easy to float upwards from molten steel, so that the molten steel is purified, the impact toughness and the processing performance of the steel are improved, and compared with the silicon-calcium-aluminum alloy, the silicon-calcium-aluminum alloy has good effect, high alloy utilization rate and lower cost;
2. the silicon-calcium-aluminum alloy production process adopted by the invention adopts a metal heating method to produce, and utilizes chemical heat produced by chemical reduction reaction to heat the alloy, so that the reaction is automatically carried out, and compared with the traditional electric furnace method for smelting the alloy, the consumption of electric energy is greatly saved, and meanwhile, the process can produce special alloy with extremely low carbon content;
3. according to the invention, after materials are fully mixed, a semi-closed cylinder type reduction reactor is adopted, the silicon-calcium-aluminum alloy is produced in the reduction reactor by adopting a continuous operation method, the reduction reactor, the forming briquetting machine and the crushing workshop are all connected with a dust removal system, the dust remover connected with the dust removal system is communicated with a pipeline for enabling powder to enter a powder returning bin, dust generated in each step of the reduction reactor, the forming briquetting machine and the crushing workshop is all fed into the powder returning bin for reprocessing, and the whole production link does not generate fixed waste, so that the method is energy-saving and environment-friendly.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to FIG. 1, a silicon-calcium-aluminum alloy having a grain size of 5-50 mm comprises the following chemical components (wt%):
the preparation raw materials of the silicon-calcium-aluminum alloy comprise the following materials in percentage: 25% -32% of silica, 34% -40% of active calcium oxide, 28% -35% of aluminum particles and 1% -2% of bonding agent, wherein the bonding agent comprises a reducing agent, a solvent and a heat generating agent, and the reducing agent, the solvent and the heat generating agent all accord with the national standard.
SiO in silica 2 More than 98%, al in silica 2 O 3 And Fe (Fe) 2 O 3 The total content is less than 1%, the impurity content is less than 1%, the granularity of silica is 5-20 mm, the part with granularity less than 5mm is less than or equal to 5%, and the part with granularity greater than 20mm is less than or equal to 5%;
the CaO content in the active calcium oxide is more than 85 percent, and the active calcium oxide is aliveAl in sexual calcium oxide 2 O 3 The content is less than 0.5 percent, fe 2 O 3 The content is less than 0.3 percent, the S content is less than or equal to 0.05 percent, the P content is less than or equal to 0.02 percent, and the granularity of the active calcium oxide is 10 to 15mm;
the Al content in the aluminum particles is more than 97%, the granularity of the aluminum particles is 0.1-10 mm, the impurity content of the aluminum particles is less than 0.5%, and the water content is less than 2%.
In order to better show the production flow of the silicon-calcium-aluminum alloy, the embodiment now provides a production process of the silicon-calcium-aluminum alloy, and main equipment comprises a stirrer, a forming briquetting machine, a dust remover fan, a finished product crusher, various pumps and the like, and specifically comprises the following steps:
step one: all raw materials must be carefully selected before entering a bin, impurities such as soil and the like cannot be present on the surface of silica, raw firing and overburning cannot be carried out on active calcium oxide after washing before entering a furnace, impurities in the raw materials are removed, silica, aluminum particles and active calcium oxide enter the bin after finishing and screening, the raw materials, reducing agent, flux and heating agent enter a mixing bin through a belt conveyor vibrating screen according to a set metering proportion, the raw materials are uniformly mixed through a stirrer, the raw materials are fully and uniformly mixed in the mixing process, the caking phenomenon cannot be caused, the belt metering scale is regularly corrected, and the metering accuracy is ensured;
step two: fully and uniformly mixing the materials, then, entering a barrel type reduction reactor to carry out self chemical reduction reaction, strictly controlling the reaction time of the uniformly mixed materials in the barrel type reduction reactor, wherein the barrel type reduction reactor adopts a semi-closed barrel type reduction reactor, and the silicon-calcium-aluminum alloy is produced in the reduction reactor by adopting a continuous operation method;
step three: the reacted materials enter a forming briquetting machine for briquetting, and enter a drying workshop for roasting and hardening after briquetting to prepare a semi-finished product;
step four: the semi-finished product enters a crushing workshop to be subjected to coarse crushing and fine crushing, then is subjected to granularity grading, and powder generated after the coarse crushing and the fine crushing is uniformly returned to a powder returning bin;
step five: the qualified product is packaged, the powder returns to the raw material bin for reprocessing, the finished product package comprises a packaging process, a detection process and a warehousing process, the powder returning bin is in vibration connection with a belt conveyor, a mixing bin, a simultaneous reduction reactor, a forming briquetting machine and a crushing workshop are all connected with a dust removing system, a dust remover connected with the dust removing system is communicated with a pipeline for enabling the powder to enter the powder returning bin, dust generated in each step of the mixing bin, the simultaneous reduction reactor, the forming briquetting machine and the crushing workshop is all fed into the powder returning bin for reprocessing, and no fixed waste is generated in the whole production link.
The silicon-calcium-aluminum alloy production is carried out by adopting the raw material proportions in the following examples one to four and the silicon-calcium-aluminum alloy production process.
And detecting the prepared silicon-calcium-aluminum alloy, wherein the physicochemical report obtained by detection is as follows:
from the data, the silicon-calcium aluminum alloy production can be carried out by adopting the proportion from the first embodiment to the fourth embodiment, and the silicon-calcium aluminum alloy meeting the requirements can be obtained, namely Si is more than or equal to 12%, ca is more than or equal to 15%, al is more than or equal to 12%, P is less than or equal to 0.05%, S is less than or equal to 0.08%, and C is less than or equal to 0.05%.
The silicon-calcium aluminum alloy processed in the second embodiment was tested on YS-SS400B, Q235B under the following conditions:
| converter | Argon blowing station | Casting machine | Tapping amount (t) |
| 4×50t | 4-seat on-line | Square blank and special-shaped blank | 70 |
The using method is as follows: adding the silicon-calcium aluminum alloy according to the adding of 70 kg/furnace, and beginning to add the silicon-calcium aluminum alloy when tapping 1/4, wherein the adding is finished before tapping 3/4, and the adding sequence is as follows: silicon-calcium aluminum alloy- & gt SiMn- & gt FeSi- & gt silicon-calcium aluminum alloy, wherein the specific test data are as follows:
as can be seen from the table, the average adding amount of the silicon-calcium-aluminum alloy is 72.1kg, the average end point carbon of the converter is 0.118%, the average pre-argon temperature is 1615.1 ℃, and the average pre-argon oxygen level is only 52.6ppm, so that the silicon-calcium-aluminum alloy prepared by the invention has good deoxidizing effect, reduces H-shaped steel bubble cracking waste products, and simultaneously can reduce the cost compared with the current ordinary carbon steel deoxidizer.
To sum up: according to the silicon-calcium-aluminum alloy and the production process thereof provided by the invention, the prepared silicon-calcium-aluminum alloy can minimize the oxygen content in steel, and meanwhile, the formed complex inclusions such as calcium, aluminum and the like are easy to float upwards from molten steel, so that the molten steel is purified, the impact toughness and the processing performance of the steel are improved, and compared with the silicon-calcium-aluminum alloy, the silicon-iron alloy and the silicon-calcium alloy, the silicon-calcium-aluminum alloy are better in effect, high in alloy utilization rate and lower in cost; the silicon-calcium-aluminum alloy production process adopted by the invention adopts a metal heating method to produce, and utilizes chemical heat produced by chemical reduction reaction to heat the alloy, so that the reaction is automatically carried out, and compared with the traditional electric furnace method for smelting the alloy, the consumption of electric energy is greatly saved, and meanwhile, the process can produce special alloy with extremely low carbon content; after fully mixing materials, adopting a semi-closed cylinder type reduction reactor, producing the silicon-calcium-aluminum alloy in the reduction reactor by adopting a continuous operation method, wherein the reduction reactor, a forming briquetting machine and a crushing workshop are all connected with a dust removing system, the dust remover connected with the dust removing system is communicated with a pipeline for enabling powder to enter a powder returning bin, and dust generated in each step of the reduction reactor, the forming briquetting machine and the crushing workshop can enter the powder returning bin to be processed again, so that the whole production link does not generate fixed waste, and the method is energy-saving and environment-friendly.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (10)
1. A silicon-calcium-aluminum alloy, characterized in that: the granularity of the silicon-calcium aluminum alloy is 5-50 mm, and the silicon-calcium aluminum alloy comprises the following chemical components: si is more than or equal to 12%, ca is more than or equal to 15%, al is more than or equal to 12%, P is less than or equal to 0.05%, S is less than or equal to 0.08%, and C is less than or equal to 0.05%, and the preparation raw materials of the silicon-calcium-aluminum alloy comprise the following materials in percentage: 25-32% of silica, 34-40% of active calcium oxide, 28-35% of aluminum particles and 1-2% of binding agent, wherein SiO in the silica 2 The content of CaO in the active calcium oxide is more than 85 percent, the content of Al in the aluminum particles is more than 97 percent, and the binding agent comprises a reducing agent, a solvent and a heating agent.
2. A silicon-calcium-aluminum alloy according to claim 1, wherein: al in the silica 2 O 3 And Fe (Fe) 2 O 3 The total content is less than 1%, and the impurity content is less than 1%.
3. A silicon-calcium-aluminum alloy according to claim 2, wherein: the granularity of the silica is 5-20 mm, the granularity is less than or equal to 5% of the part with granularity less than 5mm, and the granularity is more than 20mm and less than or equal to 5%.
4. A silicon-calcium-aluminum alloy according to claim 1, wherein: al in the active calcium oxide 2 O 3 The content is less than 0.5 percent, fe 2 O 3 The content is less than 0.3 percent, the S content is less than or equal to 0.05 percent, and the P content is less than or equal to 0.02 percent.
5. A silicon-calcium-aluminum alloy according to claim 4 wherein: the granularity of the active calcium oxide is 10-15 mm, and the granularity of 200 meshes is more than or equal to 90 percent.
6. A silicon-calcium-aluminum alloy according to claim 1, wherein: the granularity of the aluminum particles is 0.1-10 mm, the impurity content of the aluminum particles is less than 0.5%, and the water content is less than 2%.
7. A process for producing a silicon-calcium-aluminium alloy according to any one of claims 1 to 6, comprising the steps of:
s1: silica, aluminum particles and active calcium oxide enter a bin after finishing and screening, and enter a mixing bin together with a reducing agent, a flux and a heating agent through a belt conveyor vibrating screen according to a set metering proportion, so that the raw materials are fully mixed in the mixing process, the caking phenomenon is avoided, the belt metering scale is corrected regularly, and the metering accuracy is ensured;
s2: the materials are fully and evenly mixed and then enter a cylinder type reduction reactor to carry out self chemical reduction reaction, and the reaction time of the evenly mixed materials in the cylinder type reduction reactor is strictly controlled;
s3: the reacted materials enter a forming briquetting machine for briquetting, and enter a drying workshop for roasting and hardening after briquetting to prepare a semi-finished product;
s4: the semi-finished product enters a crushing workshop for coarse crushing and fine crushing, and then is subjected to particle size classification;
s5: and (3) packaging the qualified product, returning the powder to a raw material bin for reprocessing, wherein the finished product packaging comprises packaging, detecting and warehousing processes.
8. The process for producing a silicon-calcium-aluminum alloy according to claim 7, wherein: all raw materials in the S1 must be carefully selected before entering a storage bin, impurities such as soil cannot be present on the surface of silica, raw burned and over burned cannot be mixed with active calcium oxide after washing before entering a furnace, and impurities in the raw materials are removed.
9. The process for producing a silicon-calcium-aluminum alloy according to claim 7, wherein: the barrel type reduction reactor in the step S2 adopts a semi-closed barrel type reduction reactor, and the silicon-calcium-aluminum alloy is produced in the reduction reactor by adopting a continuous operation method.
10. The process for producing a silicon-calcium-aluminum alloy according to claim 7, wherein: and the powder generated after the coarse breaking and the fine breaking uniformly returns to a powder returning bin, and the powder returning bin is connected with the belt conveyor in a vibrating way.
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