CN114525441A - System for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel material and using method thereof - Google Patents
System for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel material and using method thereof Download PDFInfo
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- CN114525441A CN114525441A CN202111662332.2A CN202111662332A CN114525441A CN 114525441 A CN114525441 A CN 114525441A CN 202111662332 A CN202111662332 A CN 202111662332A CN 114525441 A CN114525441 A CN 114525441A
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
-
- 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
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses a system for producing a high-purity high-carbon high-chromium-manganese 18 high-manganese steel material, which comprises a plug rod, a lifting rod, a connecting rod, sleeve bricks, fixing screws, an operating rod, a furnace body, a plug brick, a casting nozzle brick, a seat brick, a furnace lining, a gas permeable block, a steel pipe, a gas pipe, a helium bottle, a protection contact, a contact protector, a lead a and a protection device. The hardness of the high-carbon high-chromium manganese 18 high-manganese steel material prepared by the system reaches 242.5HB, the oxygen content is 5.6ppm, and the hydrogen content is 1.1ppm, which shows that the high-carbon high-chromium manganese 18 high-manganese steel material prepared by the method has extremely low oxygen and hydrogen contents and extremely high hardness, and can meet the requirements of being applied to production of medium and large-sized impact crusher liners, large-sized impact crusher plate hammers (with the diameter of more than 1.5 meters) and the like.
Description
Technical Field
The invention belongs to the technical field of refining equipment use, and particularly relates to a system for producing a high-purity high-carbon high-chromium-manganese 18 high-manganese steel material and a use method thereof.
Background
High manganese steel materials are conventional wear resistant materials. After more than one hundred years of development, four series of manganese 8, manganese 13, manganese 18, manganese 25 and the like are formed. The high manganese steel material is widely used in mechanical equipment components in the industries of metallurgy, mines, building materials, cement, railways, electric power, petrochemical industry, military industry and the like. The wear resistance and the service life of the high manganese steel material have very important relationship with the metallurgical quality. The wear resistance of the high-manganese steel material is improved, the service life is prolonged, and the method has great significance for continuous production, reduction of economic loss and increase of economic benefit.
At present, three manufacturing processes of domestic and foreign pure steel are mainly adopted:
1) blast furnace-pretreatment of cast steel liquid-converter-external refining (LF, RH). The process method needs to be provided with external refining equipment, and has complex process and complex operation;
2) ultra high power, high power Electric Arc Furnace (EAF) -external refining (LF, RH). The process method also needs to be provided with external refining equipment and has higher requirements on raw materials;
3) vacuum Induction Furnace (VIF) and electroslag remelting (ESR). The vacuum melting equipment used by the process method is large in investment, and the remelting needs large electricity consumption.
At present, domestic smelting equipment and processes mostly adopt non-oxidation smelting processes, but the existing system for refining high manganese steel has the following defects: firstly, the degree of the inert gas washing the furnace lining in the purification treatment process of the high-manganese molten steel cannot be detected, and a better inert gas flow is selected, so that the cost is higher; secondly, when molten high manganese molten steel seeps out of the furnace lining and is communicated with the furnace body shell, the furnace penetration accident cannot be well avoided; thirdly, the effect of purifying and treating oxygen and hydrogen of the high manganese steel is poor, and the quality of the product is influenced. Therefore, in order to overcome the defects, the existing refining system needs to be improved urgently so as to meet the production requirement of high-purity high-manganese steel materials.
Disclosure of Invention
The invention provides a system for producing a high-purity high-carbon high-chromium-manganese 18 high-manganese steel material and a using method thereof, and aims to solve the problems of poor safety and purification effect and the like of the conventional refining system.
In order to solve the technical problems, the invention adopts the following technical scheme:
a system for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel materials comprises a plug rod, a lifting rod, a connecting rod, sleeve bricks, fixing screws, an operating rod, a furnace body, plug bricks, casting nozzle bricks, seat bricks, a furnace lining, a gas permeable block, a steel pipe, a gas pipe, a helium bottle, a protection contact, a contact protector, a lead a and a protection device; a plug rod connected with the bottom of the furnace body is arranged in the furnace body, sleeve bricks are wrapped around the plug rod, the top of the plug rod is sequentially connected with a lifting rod and an operating rod which are fixed on the outer side of the furnace body through a connecting rod, and the lifting rod is positioned right above the operating rod and fixed on the outer side of the furnace body through a fixing screw; the bottom of the plug rod is connected with the bottom of the lining brick through a plug brick, a casting brick and a seat brick, the plug brick, the casting brick and the seat brick are all arranged in the lining brick, the plug brick extends out of the upper part of the lining brick, the casting brick extends out of the bottom of the lining brick, and the seat brick is wrapped outside the casting brick and is connected with the lining brick; a furnace lining is further arranged in the furnace body and comprises lining bricks, a sand layer and a heat insulation plate, an air permeable block is further arranged at the bottom of each lining brick, and an air inlet of the air permeable block is connected with a helium tank sequentially through a steel pipe, a quick connector and an air pipe; the furnace bottom protection contact is embedded in a furnace lining at the bottom of the furnace body, and the contact protector is connected with the furnace bottom protection contact through a lead a; the protection device comprises a heating induction coil, a temperature inductor and a lead b, wherein the temperature inductor is connected with the heating induction coil through the lead b, and the heating induction coil is arranged in the horizontal direction inside a furnace lining on the upper part of the furnace body.
Further, the steel pipe is a seamless stainless steel pipe.
Further, the trachea is a PU soft trachea.
Further, the inner diameter of the PU hose is 0.3-0.7 cm.
Furthermore, the furnace bottom protection contact is made of non-magnetic steel materials.
Further, the furnace bottom protection contact is provided with 4.
Further, 4 induction contacts are arranged on the heating induction coil.
Furthermore, the number of the heating induction coils is 4, and the adjacent heating induction coils are arranged at intervals of 390-410 mm.
The invention also provides a use method of the system for producing the high-purity high-carbon high-chromium-manganese 18 high-manganese steel material, which comprises the following steps:
the raw materials are put into the system for smelting, helium is blown in the smelting process, a slagging agent is covered to remove impurities, and then the high-purity high-carbon high-chromium-manganese 18 high-manganese steel material is prepared after the steps of chemical composition adjustment, furnace sedation, temperature control tapping and heat treatment.
The invention has the following beneficial effects:
(1) the system for producing the high-purity high-carbon high-chromium-manganese 18 high-manganese steel material can detect the degree of the helium gas scouring the furnace lining at the bottom of the furnace body in the purification treatment process of the high-manganese molten steel by additionally arranging the furnace bottom induction device, thereby selecting a better helium gas flow and saving the cost.
(2) According to the system for producing the high-purity high-carbon high-chromium-manganese 18 high-manganese steel material, the protective device is additionally arranged, so that the service life of the furnace lining at the upper part of the furnace body can be accurately controlled, and when the furnace lining at the upper part of the furnace body is contacted with the heating induction coil due to the ablation point caused by high-temperature high-manganese molten steel, the early warning that the service life of the furnace lining at the upper part of the furnace body is up is realized, and the furnace lining at the upper part of the furnace body needs to be replaced; the furnace body protection device can effectively protect the furnace lining on the upper part of the furnace body and a whole set of system for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel materials, when molten high-manganese steel water seeps out of the furnace lining on the upper part of the furnace body and is communicated with the furnace body shell, the protection device is opened, the melt main power supply is closed in time, and the furnace penetrating accident is avoided.
(3) The hardness of the high-carbon high-chromium manganese 18 high-manganese steel material prepared by the invention reaches 242.5HB, the oxygen content is 5.6ppm, and the hydrogen content is 1.1ppm, which shows that the high-carbon high-chromium manganese 18 high-manganese steel material prepared by the method has extremely low oxygen and hydrogen contents and extremely high hardness, and can meet the requirements of being applied to production of medium and large-sized impact crusher liners, large-sized impact crusher plate hammers (with the diameter of more than 1.5 meters) and the like.
Drawings
FIG. 1 is a schematic structural diagram of a system for producing a high purity high carbon high chromium manganese 18 high manganese steel material according to the present invention;
fig. 2 is a schematic structural view of the protection device.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
Example 1
As shown in fig. 1 and 2, a system for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel material comprises a plug rod 1, a lifting rod 2, a connecting rod 3, sleeve bricks 4, fixing screws 5, an operating rod 6, a furnace body 7, plug bricks 8, casting nozzle bricks 9, seat bricks 10, a furnace lining 11, a gas permeable block 12, a seamless stainless steel pipe 13, a PU soft gas pipe 14, a helium gas cylinder 15, a protection contact 16, a contact protector 17, a lead wire a 18 and a protection device 19; a plug rod 1 connected with the bottom of the furnace body 7 is arranged in the furnace body 7, sleeve bricks 4 are wrapped around the plug rod 1, the top of the plug rod 1 is sequentially connected with a lifting rod 2 and an operating rod 6 which are fixed on the outer side of the furnace body 7 through a connecting rod 3, wherein the lifting rod 2 is positioned right above the operating rod 6 and fixed on the outer side of the furnace body 7 through a fixing screw 5; the bottom of the plug rod 1 is connected with the bottom of the lining brick through a plug brick 8, a casting nozzle brick 9 and a seat brick 10, the plug brick 8, the casting nozzle brick 9 and the seat brick 10 are all arranged in the lining brick, the plug brick 8 extends out of the upper part of the lining brick, the casting nozzle brick 9 extends out of the bottom of the lining brick, and the seat brick 10 is wrapped outside the casting nozzle brick 9 and is connected with the lining brick; a furnace lining 11 is further arranged in the furnace body 7, the furnace lining 11 comprises lining bricks, a sand layer and a heat insulation plate, a ventilation block 12 is further arranged at the bottom of the lining bricks, and a gas inlet of the ventilation block 12 is connected with a helium tank 15 through a seamless stainless steel pipe 13, a quick connector and a PU soft gas pipe 14 in sequence, wherein the inner diameter of the PU soft gas pipe is 0.4cm, and the specifications of the helium tank 15 are 13.1KG and 15 MPA; the furnace bottom induction device comprises furnace bottom protection contacts 16, contact protectors 17 and leads a 18, wherein the furnace bottom protection contacts 16 are embedded in a furnace lining 11 at the bottom of a furnace body 7, the contact protectors 17 are connected with the furnace bottom protection contacts 16 through the leads a 18, the furnace bottom protection contacts 16 are made of non-magnetic steel materials, and 4 furnace bottom protection contacts 16 are arranged; the protection device 19 is composed of a heating induction coil 19-1, a temperature inductor 19-2 and a lead wire b 19-3, the temperature inductor 19-2 is connected with the heating induction coil 19-1 through the lead wire b 19-3, 4 induction contacts 19-1-1 are arranged on the heating induction coil 19-1, the heating induction coil 19-1 is arranged in the horizontal direction in the furnace lining 11 at the upper part of the furnace body 7, 4 heating induction coils 19-1 are arranged, and the interval between the adjacent heating induction coils 19-1 is 390 mm.
Example 2
As shown in fig. 1 and 2, a system for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel material comprises a plug rod 1, a lifting rod 2, a connecting rod 3, sleeve bricks 4, fixing screws 5, an operating rod 6, a furnace body 7, plug bricks 8, casting nozzle bricks 9, seat bricks 10, a furnace lining 11, a gas permeable block 12, a seamless stainless steel pipe 13, a PU soft gas pipe 14, a helium gas cylinder 15, a protection contact 16, a contact protector 17, a lead wire a 18 and a protection device 19; a plug rod 1 connected with the bottom of the furnace body 7 is arranged in the furnace body 7, sleeve bricks 4 are wrapped around the plug rod 1, the top of the plug rod 1 is sequentially connected with a lifting rod 2 and an operating rod 6 which are fixed on the outer side of the furnace body 7 through a connecting rod 3, wherein the lifting rod 2 is positioned right above the operating rod 6 and fixed on the outer side of the furnace body 7 through a fixing screw 5; the bottom of the plug rod 1 is connected with the bottom of the lining brick through a plug brick 8, a casting nozzle brick 9 and a seat brick 10, the plug brick 8, the casting nozzle brick 9 and the seat brick 10 are all arranged in the lining brick, the plug brick 8 extends out of the upper part of the lining brick, the casting nozzle brick 9 extends out of the bottom of the lining brick, and the seat brick 10 is wrapped outside the casting nozzle brick 9 and is connected with the lining brick; a furnace lining 11 is further arranged in the furnace body 7, the furnace lining 11 comprises lining bricks, a sand layer and a heat insulation plate, a ventilation block 12 is further arranged at the bottom of the lining bricks, and a gas inlet of the ventilation block 12 is connected with a helium tank 15 through a seamless stainless steel pipe 13, a quick connector and a PU soft gas pipe 14 in sequence, wherein the inner diameter of the PU soft gas pipe is 0.3cm, and the specifications of the helium tank 15 are 13.1KG and 15 MPA; the furnace bottom induction device comprises furnace bottom protection contacts 16, contact protectors 17 and leads a 18, wherein the furnace bottom protection contacts 16 are embedded in a furnace lining 11 at the bottom of a furnace body 7, the contact protectors 17 are connected with the furnace bottom protection contacts 16 through the leads a 18, the furnace bottom protection contacts 16 are made of non-magnetic steel materials, and 4 furnace bottom protection contacts 16 are arranged; the protection device 19 comprises a heating induction coil 19-1, a temperature inductor 19-2 and a conducting wire b 19-3, wherein the temperature inductor 19-2 is connected with the heating induction coil 19-1 through the conducting wire b 19-3, 4 induction contacts 19-1-1 are arranged on the heating induction coil 19-1, the heating induction coil 19-1 is arranged in the horizontal direction in the furnace lining 11 at the upper part of the furnace body 7, 4 heating induction coils 19-1 are arranged, and the interval between the adjacent heating induction coils 19-1 is 400 mm.
Example 3
As shown in fig. 1 and 2, a system for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel material comprises a plug rod 1, a lifting rod 2, a connecting rod 3, sleeve bricks 4, fixing screws 5, an operating rod 6, a furnace body 7, plug bricks 8, casting nozzle bricks 9, seat bricks 10, a furnace lining 11, a gas permeable block 12, a seamless stainless steel pipe 13, a PU soft gas pipe 14, a helium gas cylinder 15, a protection contact 16, a contact protector 17, a lead wire a 18 and a protection device 19; a plug rod 1 connected with the bottom of the furnace body 7 is arranged in the furnace body 7, sleeve bricks 4 are wrapped around the plug rod 1, the top of the plug rod 1 is sequentially connected with a lifting rod 2 and an operating rod 6 which are fixed on the outer side of the furnace body 7 through a connecting rod 3, wherein the lifting rod 2 is positioned right above the operating rod 6 and fixed on the outer side of the furnace body 7 through a fixing screw 5; the bottom of the plug rod 1 is connected with the bottom of the lining brick through a plug brick 8, a casting nozzle brick 9 and a seat brick 10, the plug brick 8, the casting nozzle brick 9 and the seat brick 10 are all arranged in the lining brick, the plug brick 8 extends out of the upper part of the lining brick, the casting nozzle brick 9 extends out of the bottom of the lining brick, and the seat brick 10 is wrapped outside the casting nozzle brick 9 and is connected with the lining brick; a furnace lining 11 is further arranged in the furnace body 7, the furnace lining 11 comprises lining bricks, a sand layer and a heat insulation plate, a ventilation block 12 is further arranged at the bottom of the lining bricks, and a gas inlet of the ventilation block 12 is connected with a helium tank 15 through a seamless stainless steel pipe 13, a quick connector and a PU soft gas pipe 14 in sequence, wherein the inner diameter of the PU soft gas pipe is 0.3cm, and the specifications of the helium tank 15 are 13.1KG and 15 MPA; the furnace bottom induction device comprises furnace bottom protection contacts 16, contact protectors 17 and leads a 18, wherein the furnace bottom protection contacts 16 are embedded in a furnace lining 11 at the bottom of a furnace body 7, the contact protectors 17 are connected with the furnace bottom protection contacts 16 through the leads a 18, the furnace bottom protection contacts 16 are made of non-magnetic steel materials, and 4 furnace bottom protection contacts 16 are arranged; the protection device 19 is composed of a heating induction coil 19-1, a temperature inductor 19-2 and a lead wire b 19-3, the temperature inductor 19-2 is connected with the heating induction coil 19-1 through the lead wire b 19-3, 4 induction contacts 19-1-1 are arranged on the heating induction coil 19-1, the heating induction coil 19-1 is arranged in the horizontal direction in the furnace lining 11 at the upper part of the furnace body 7, 4 heating induction coils 19-1 are arranged, and the adjacent heating induction coils 19-1 are arranged at intervals of 410 mm.
Example 4
As shown in fig. 1 and 2, a system for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel material comprises a plug rod 1, a lifting rod 2, a connecting rod 3, sleeve bricks 4, fixing screws 5, an operating rod 6, a furnace body 7, plug bricks 8, casting nozzle bricks 9, seat bricks 10, a furnace lining 11, a gas permeable block 12, a seamless stainless steel pipe 13, a PU soft gas pipe 14, a helium gas cylinder 15, a protection contact 16, a contact protector 17, a lead wire a 18 and a protection device 19; a plug rod 1 connected with the bottom of the furnace body 7 is arranged in the furnace body 7, sleeve bricks 4 are wrapped around the plug rod 1, the top of the plug rod 1 is sequentially connected with a lifting rod 2 and an operating rod 6 which are fixed on the outer side of the furnace body 7 through a connecting rod 3, wherein the lifting rod 2 is positioned right above the operating rod 6 and fixed on the outer side of the furnace body 7 through a fixing screw 5; the bottom of the plug rod 1 is connected with the bottom of the lining brick through a plug brick 8, a casting nozzle brick 9 and a seat brick 10, the plug brick 8, the casting nozzle brick 9 and the seat brick 10 are all arranged in the lining brick, the plug brick 8 extends out of the upper part of the lining brick, the casting nozzle brick 9 extends out of the bottom of the lining brick, and the seat brick 10 is wrapped outside the casting nozzle brick 9 and is connected with the lining brick; a furnace lining 11 is further arranged in the furnace body 7, the furnace lining 11 comprises lining bricks, a sand layer and a heat insulation plate, a ventilation block 12 is further arranged at the bottom of the lining bricks, and a gas inlet of the ventilation block 12 is connected with a helium tank 15 through a seamless stainless steel pipe 13, a quick connector and a PU soft gas pipe 14 in sequence, wherein the inner diameter of the PU soft gas pipe is 0.7cm, and the specifications of the helium tank 15 are 13.1KG and 15 MPA; the furnace bottom induction device comprises furnace bottom protection contacts 16, contact protectors 17 and leads a 18, wherein the furnace bottom protection contacts 16 are embedded in a furnace lining 11 at the bottom of a furnace body 7, the contact protectors 17 are connected with the furnace bottom protection contacts 16 through the leads a 18, the furnace bottom protection contacts 16 are made of non-magnetic steel materials, and 4 furnace bottom protection contacts 16 are arranged; the protection device 19 is composed of a heating induction coil 19-1, a temperature inductor 19-2 and a lead wire b 19-3, the temperature inductor 19-2 is connected with the heating induction coil 19-1 through the lead wire b 19-3, 4 induction contacts 19-1-1 are arranged on the heating induction coil 19-1, the heating induction coil 19-1 is arranged in the horizontal direction in the furnace lining 11 at the upper part of the furnace body 7, 4 heating induction coils 19-1 are arranged, and the adjacent heating induction coils 19-1 are arranged at intervals of 400 mm.
Example 5
The use method of the system for producing the high-purity high-carbon high-chromium-manganese 18 high-manganese steel material comprises the following steps:
s1, preparation materials: weighing various raw materials for smelting the high-manganese molten steel according to the chemical component requirements of the high-manganese steel material, wherein the raw materials comprise scrap steel, pig iron, ferromanganese, ferrosilicon, ferrochrome, ferronickel, ferromolybdenum, ferrovanadium, ferrotitanium and ferrocopper for later use;
s2, charging and smelting: gradually putting various raw materials weighed in the step S1 into a system for producing a high-purity high-carbon high-chromium-manganese 18 high-manganese steel material (the system of the embodiment 1) for smelting, when the high-manganese steel material is molten to form a molten pool, namely when high-manganese molten steel covers the bottom of the furnace by 29.1cm, starting to open a flow regulator to blow and inject helium, wherein the helium passes through a gas permeable block to participate in the melting process of the high-manganese molten steel, and the flow of the blown helium is increased along with the increase of the high-manganese molten steel along with the continuation of smelting, wherein the specific control process is as follows: controlling the flow rate of the helium gas to be 16.2-16.7L/min for the first 9-12 min; controlling the flow rate of the helium gas to be 17.1-17.3L/min at 13-18 min; controlling the flow rate of the helium gas to be 17.8-18.1L/min at 19-28 min; covering the surface of the high manganese molten steel with a slagging agent at the beginning of 29min, wherein the addition amount is 0.59 kg/ton of total raw materials; controlling the flow rate of the helium gas to be 16.9-17.1L/min at 29-50 min; until furnace burden is melted down, sampling and analyzing components in the furnace;
s3, adjusting chemical components: calculating and adding the adjusting material according to the sampling analysis result until the adjusting material is completely melted;
s4, furnace sedation: after the high manganese molten steel in the intermediate frequency furnace reaches the required temperature, stopping power supply, continuously blowing helium gas to ensure that the high manganese molten steel is uniform in temperature and homogeneous, and impurities and gas are fully floated and combined with the liquid surface slagging agent;
s5, controlling temperature and tapping: controlling the tapping temperature to 1552 ℃, and pouring a casting mold when the temperature is reduced to 1459 ℃ to obtain a casting piece;
s6, heat treatment: heating the casting piece prepared in the step S5 from normal temperature to 660 ℃ at a heating speed of 124 ℃/h, and preserving heat for 0.9 h; then, the heating speed is increased to 208 ℃/h until the water quenching temperature is 1097 ℃, and the temperature is kept for 1.2 h; after the heat preservation is finished, the heat-treated casting is quickly put into a water tank, and after cooling, a high-purity high-carbon high-chromium-manganese 18 high-manganese steel material is prepared, and by adopting spectral analysis, the high-purity high-carbon high-chromium-manganese 18 high-manganese steel material comprises the following components in percentage by mass: 1.44% of C, 18.15% of Mn, 4.26% of Cr, 0.78% of Si, 0.03% of P, 0.02% of S, 0.11% of Ni, 0.76% of Mo, 0.68% of V, 0.53% of Ti, 0.71% of Cu, 5.6ppm of O element, 1.1ppm of H element and the balance of Fe.
The breathable block in the step S2 comprises the following raw materials in parts by weight: 33 parts of zirconium mullite particles, 22 parts of magnesium dolomite particles, 14 parts of corundum particles, 8 parts of nano diatomite, 4 parts of potassium permanganate, 5 parts of sodium bicarbonate, 15 parts of electrolytic manganese slag, 12 parts of gallium hydroxide, 9 parts of magnesium nitrate, 13 parts of a bonding agent, 4 parts of a dispersing agent, 3 parts of polypropylene fibers and 27 parts of water;
the grain diameter of the zirconium mullite grains is 2.36-3.68 mm;
the grain diameter of the magnesium dolomite grains is 1.35-2.94 mm;
the grain diameter of the corundum particles is 1.02-1.35 mm;
the binding agent is calcium aluminate cement;
the dispersant is sodium hexametaphosphate;
the titer of the polypropylene fiber is 17 deniers, and the water content is 4.8%;
the preparation process of the breathable block comprises the following steps:
(1) adding zirconium mullite particles, magnesium dolomite particles, corundum particles, nano diatomite, potassium permanganate, sodium bicarbonate, electrolytic manganese slag, gallium hydroxide, magnesium nitrate, a bonding agent, a dispersing agent, polypropylene fibers and water into a premixing device, and stirring at the rotating speed of 400r/min for 17min to prepare a mixture;
(3) transferring the mixture prepared in the step (2) into a mold, and performing compression molding under the pressure of 129MPa to prepare a green compact of the breathable block;
(4) placing the green permeable block prepared in the step (3) at 54 ℃ and curing for 3.2 h;
(5) demolding after the curing in the step (4) is finished to obtain a breathable block blank;
(6) curing the air-permeable block blank prepared in the step (5) at 30 ℃ for 22h to prepare a cured air-permeable block blank;
(7) and (4) sintering the cured gas permeable block blank prepared in the step (6) to prepare the gas permeable block.
The slag former in the step S2 comprises the following raw materials in parts by weight: 35 parts of corundum slag, 7 parts of borax, 7 parts of magnesia, 15 parts of mica powder, 11 parts of calcium aluminate powder, 8 parts of fluorite powder, 14 parts of bentonite, 7 parts of quartz sand and 20 parts of water glass;
the granularity of the mica powder is 800 meshes;
the particle size of the calcium aluminate powder is 800 meshes;
the granularity of the fluorite powder is 800 meshes;
the granularity of the bentonite is 700 meshes;
the granularity of the quartz sand is 700 meshes;
the preparation method of the slagging agent comprises the following steps:
s1: adding corundum slag, borax, magnesia, mica powder, calcium aluminate powder, fluorite powder, bentonite, quartz sand and water glass into a stirrer, and stirring for 1.2 hours at the rotating speed of 400r/min to prepare uniform slurry;
s2: adding the uniform slurry prepared in the step S1 into a mould, and preparing into particles with the particle size of 1cm after vacuum suction filtration molding;
s3: and (4) feeding the granules prepared in the step S2 into an oven, and drying at 88 ℃ until the water content is 1% to prepare the slagging agent.
The hardness HB and the oxygen and hydrogen contents of the high-carbon high-chromium-manganese 18 high-manganese steel material prepared in the embodiment 5 are detected, each index is repeatedly measured for 3 times, and the average value is calculated, wherein the hardness HB is detected by adopting the relevant regulation of national standard GB-T231.1-2018; the oxygen and hydrogen contents are detected by adopting spectral analysis, and the detection results are shown in the following table:
| test group | Hardness HB | Oxygen content/ppm | Hydrogen content/ppm |
| Example 4 | 242.5 | 5.6 | 1.1 |
From the above table, it can be seen that: the hardness of the high-carbon high-chromium manganese 18 high-manganese steel material prepared by the invention reaches 242.5HB, the oxygen content is 5.6ppm, and the hydrogen content is 1.1ppm, which shows that the high-carbon high-chromium manganese 18 high-manganese steel material prepared by the method has extremely low oxygen and hydrogen contents and extremely high hardness, and can meet the requirements of being applied to production of medium and large-sized impact crusher liners, large-sized impact crusher plate hammers (with the diameter of more than 1.5 meters) and the like.
Those skilled in the art will recognize that numerous variations are possible from the above description and that the examples are intended only to describe specific embodiments.
While there has been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions may be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept described herein. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments and equivalents falling within the scope of the invention.
Claims (9)
1. A system for producing high-purity high-carbon high-chromium-manganese 18 high-manganese steel materials is characterized by comprising a plug rod, a lifting rod, a connecting rod, sleeve bricks, fixing screws, an operating rod, a furnace body, plug bricks, casting nozzle bricks, seat bricks, a furnace lining, a gas permeable block, a steel pipe, a gas pipe, a helium bottle, a protection contact, a contact protector, a lead a and a protection device; a plug rod connected with the bottom of the furnace body is arranged in the furnace body, sleeve bricks are wrapped around the plug rod, the top of the plug rod is sequentially connected with a lifting rod and an operating rod which are fixed on the outer side of the furnace body through a connecting rod, and the lifting rod is positioned right above the operating rod and fixed on the outer side of the furnace body through a fixing screw; the bottom of the plug rod is connected with the bottom of the lining brick through a plug brick, a casting brick and a seat brick, the plug brick, the casting brick and the seat brick are all arranged in the lining brick, the plug brick extends out of the upper part of the lining brick, the casting brick extends out of the bottom of the lining brick, and the seat brick is wrapped outside the casting brick and is connected with the lining brick; a furnace lining is further arranged in the furnace body and comprises lining bricks, a sand layer and a heat insulation plate, an air permeable block is further arranged at the bottom of each lining brick, and an air inlet of the air permeable block is connected with a helium tank sequentially through a steel pipe, a quick connector and an air pipe; the furnace bottom protection contact is embedded in a furnace lining at the bottom of the furnace body, and the contact protector is connected with the furnace bottom protection contact through a lead a; the protection device comprises a heating induction coil, a temperature inductor and a lead b, wherein the temperature inductor is connected with the heating induction coil through the lead b, and the heating induction coil is arranged in the horizontal direction inside a furnace lining on the upper part of the furnace body.
2. The system for producing a high purity high carbon, high chromium manganese 18 high manganese steel material according to claim 1 wherein said steel pipe is a seamless stainless steel pipe.
3. The system for producing a high purity high carbon, high chromium manganese 18 high manganese steel material of claim 1 wherein said gas tube is a PU soft gas tube.
4. The system for producing a high purity high carbon high chromium manganese 18 high manganese steel material according to claim 3, wherein the PU soft gas tube has an inner diameter of 0.3-0.7 cm.
5. The system for producing a high purity high carbon, high chromium manganese 18 high manganese steel material of claim 1 wherein said hearth protection contacts are made of a non-magnetic steel material.
6. The system for producing a high purity high carbon, high chromium manganese 18 high manganese steel material as claimed in claim 5 wherein there are 4 said hearth protection contacts.
7. The system for producing a high purity high carbon, high chromium manganese 18 high manganese steel material as claimed in claim 1 wherein there are 4 inductive contacts on said heating coil.
8. The system for producing high purity high carbon high chromium manganese 18 high manganese steel material as claimed in claim 7, wherein said heating induction coils are arranged in 4 and adjacent heating induction coils are arranged at intervals of 390-410 mm.
9. Use of a system for producing a high purity high carbon high chromium manganese 18 high manganese steel material according to any one of claims 1 to 8, comprising the steps of:
the raw materials are put into the system for smelting, helium is blown in the smelting process, a slagging agent is covered to remove impurities, and then the high-purity high-carbon high-chromium-manganese 18 high-manganese steel material is prepared after the steps of chemical composition adjustment, furnace sedation, temperature control tapping and heat treatment.
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| CH648599A5 (en) * | 1981-02-13 | 1985-03-29 | Fischer Ag Georg | Process for producing low-carbide, fine-grained high-carbon manganese steel castings, product and use |
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| CN113774272A (en) * | 2021-07-23 | 2021-12-10 | 广西富川正辉机械有限公司 | High-purity manganese 13 high-manganese steel material |
| CN113774273A (en) * | 2021-07-23 | 2021-12-10 | 广西富川正辉机械有限公司 | High-purity manganese 18 high-manganese steel material and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH648599A5 (en) * | 1981-02-13 | 1985-03-29 | Fischer Ag Georg | Process for producing low-carbide, fine-grained high-carbon manganese steel castings, product and use |
| CN108517389A (en) * | 2018-05-18 | 2018-09-11 | 广西长城机械股份有限公司 | It is a kind of to utilize bottom filling ladle made of improvement air brick |
| CN109579525A (en) * | 2018-12-29 | 2019-04-05 | 广西长城机械股份有限公司 | The system for preparing high-purity potassium steel |
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