Metallurgical energy-saving composite modified pellet and preparation method thereof

Abstract

The metallurgical energy-saving composite modified pellet comprises the following raw materials by weight: dolomite powder 35-40 parts, steel slag powder 15-20 parts, sodium carboxymethyl starch 4-8 parts, cellulose ether 2-4 parts, polyacrylamide 3-5 parts and desulfurization ash 3-5 parts. The metallurgical energy-saving composite modified pellet adopts dolomite powder, steel slag powder, carboxymethyl starch and other raw materials, and simultaneously adds modified silicon carbide and bentonite agent to adjust and optimize, realizes coordinated improvement of the strength and desulfurization efficiency of the product through the mutual coordination of the raw materials, and has remarkable effects of corrosion resistance, moisture resistance and stability of the modified pellet.

Description

Technical Field

[0001] This invention relates to the field of modified ball technology, specifically to metallurgical energy-saving composite modified balls and their preparation methods. Background Technology

[0002] Problems with converter processes in some enterprises: The slag at the end of converter smelting has a high content of iron oxide and manganese oxide, which not only results in a large waste of iron and manganese metals, but also affects the subsequent slag splashing and furnace protection effect due to the high content of low melting point oxides such as iron oxide and manganese oxide. At the same time, the dissolved oxygen in the molten steel is also kept in balance due to the excessive iron and manganese oxides in the slag.

[0003] The existing composite modified balls have poor strength properties. In order to improve the strength of the product, the desulfurization efficiency of the product is easily affected. At the same time, the modified balls have poor corrosion resistance and moisture resistance, which limits the efficiency of the product. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide metallurgical energy-saving composite modified balls and their preparation method, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides metallurgical energy-saving composite modified balls, which comprise the following raw materials in parts by weight: 35-40 parts dolomite powder, 15-20 parts steel slag powder, 4-8 parts sodium carboxymethyl starch, 2-4 parts cellulose ether, 3-5 parts polyacrylamide, and 3-5 parts desulfurization ash.

[0007] The metallurgical energy-saving composite modified ball further includes 4 to 7 parts of modified silicon carbide and 5 to 8 parts of bentonite agent.

[0008] Preferably, the viscosity of the cellulose ether is 30,000 to 75,000 mPa·s.

[0009] Preferably, the modified silicon carbide is prepared by:

[0010] S01: Preheat silicon carbide at 55-60℃ for 1 hour to obtain preheated silicon carbide. Add the preheated silicon carbide to a sodium dodecylbenzenesulfonate solution with a total amount of silicon carbide of 3-5 times. Then add silane coupling agent KH550 with a total amount of silicon carbide of 15-20% and stir evenly to obtain silicon carbide liquid.

[0011] S02: 2-5 parts of basalt fiber, 1-3 parts of mesoporous silica and 3-5 parts of lanthanum oxide are blended and sintered. After sintering, a sintered body is obtained.

[0012] S03: Mix 3-5 parts of dopamine hydrochloride solution, 2-4 parts of 4% yttrium nitrate solution and 2-3 parts of titanium dioxide evenly to obtain the modified solution;

[0013] The sintered body and the modified liquid were stirred at a weight ratio of 3:5. After stirring, the modified sintered liquid was obtained.

[0014] S04: Mix silicon carbide liquid and modified sintering liquid at a weight ratio of 5:3 and ball mill them at a speed of 1500 r / min for 2 hours. After ball milling, filter and dry to obtain modified silicon carbide.

[0015] Preferably, the sodium dodecylbenzenesulfonate solution has a mass fraction of 3-5%; and the dopamine hydrochloride solution has a mass fraction of 2-4%.

[0016] Preferably, the stirring speed of the stirring treatment is 450-500 r / min, and the stirring time is 1 h; the sintering temperature of the blending and sintering treatment is 350-400℃, and the sintering time is 1 h.

[0017] Preferably, the method for preparing the bentonite agent is as follows:

[0018] S101: Heat-treat bentonite at 210-220℃ for 1 hour, then cool it to 55-60℃ at a rate of 2-5℃ / min and keep it at that temperature for 2 hours to obtain a heat-insulating bentonite agent.

[0019] S102: The heat-insulating bentonite agent and the measuring liquid are ultrasonically treated at a weight ratio of 3:5. After ultrasonic treatment, the mixture is filtered and dried to obtain the bentonite agent.

[0020] Preferably, the ultrasonic power of the ultrasonic treatment is 350-400W, and the ultrasonic treatment lasts for 1 hour.

[0021] Preferably, the measuring solution comprises the following raw materials in parts by weight: 2-5 parts diatomaceous earth, 2-4 parts sodium humate, 3-5 parts chitosan solution with a mass fraction of 5%, and 1-3 parts boron nitride.

[0022] This invention also provides a method for preparing metallurgical energy-saving composite modified balls, comprising the following steps:

[0023] Weigh the raw materials according to the specified weight, stir them evenly, and then mold them into a mold to obtain the metallurgical energy-saving composite modified balls of the present invention.

[0024] Preferably, the molding pressure of the molding process is 110-150 MPa, and the molding time is 1 hour.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention relates to metallurgical energy-saving composite modified balls made from dolomite powder, steel slag powder, and sodium carboxymethyl starch, with the addition of modified silicon carbide and bentonite agent for blending and optimization. Through the synergistic effect of the raw materials, the strength and desulfurization efficiency of the product are improved in a coordinated manner, while the modified balls exhibit significant corrosion resistance and moisture stability. The modified silicon carbide is preheated with silicon carbide diamond wire, then blended with sodium dodecylbenzenesulfonate solution and silane coupling agent, and further improved by ball milling in a modified sintering solution. The sintered body in the modified sintering solution is optimized in conjunction with the modified solution. Through the synergistic effect of the raw materials and the sintering process... The basalt fiber in the body is combined with mesoporous silica and lanthanum oxide raw materials. At the same time, the modified liquid is adjusted and improved by using dopamine hydrochloride solution, 4% yttrium nitrate solution and titanium oxide. The modified silicon carbide obtained by the co-coordination between raw materials optimizes the performance coordination and stability of the product in the system. Meanwhile, the bentonite in the bentonite agent is thermally modified to optimize its interlaminar spacing and lamellar activity. It is further optimized and improved by the diatomaceous earth and boron nitride raw materials in the weighing liquid. The resulting bentonite agent and modified silicon carbide have a better coordination effect, thus further improving the performance of the product. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The metallurgical energy-saving composite modified ball of this embodiment includes the following raw materials in parts by weight: 35-40 parts of dolomite powder, 15-20 parts of steel slag powder, 4-8 parts of sodium carboxymethyl starch, 2-4 parts of cellulose ether, 3-5 parts of polyacrylamide, and 3-5 parts of desulfurization ash.

[0029] The metallurgical energy-saving composite modified ball further includes 4 to 7 parts of modified silicon carbide and 5 to 8 parts of bentonite agent.

[0030] The viscosity of the cellulose ether in this embodiment is 30,000 to 75,000 mPa·s.

[0031] The method for preparing modified silicon carbide in this embodiment is as follows:

[0032] S01: Preheat silicon carbide at 55-60℃ for 1 hour to obtain preheated silicon carbide. Add the preheated silicon carbide to a sodium dodecylbenzenesulfonate solution with a total amount of silicon carbide of 3-5 times. Then add silane coupling agent KH550 with a total amount of silicon carbide of 15-20% and stir evenly to obtain silicon carbide liquid.

[0033] S02: 2-5 parts of basalt fiber, 1-3 parts of mesoporous silica and 3-5 parts of lanthanum oxide are blended and sintered. After sintering, a sintered body is obtained.

[0034] S03: Mix 3-5 parts of dopamine hydrochloride solution, 2-4 parts of 4% yttrium nitrate solution and 2-3 parts of titanium dioxide evenly to obtain the modified solution;

[0035] The sintered body and the modified liquid were stirred at a weight ratio of 3:5. After stirring, the modified sintered liquid was obtained.

[0036] S04: Mix silicon carbide liquid and modified sintering liquid at a weight ratio of 5:3 and ball mill them at a speed of 1500 r / min for 2 hours. After ball milling, filter and dry to obtain modified silicon carbide.

[0037] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 3-5%; the dopamine hydrochloride solution has a mass fraction of 2-4%.

[0038] In this embodiment, the stirring speed for the stirring treatment is 450-500 r / min, and the stirring time is 1 h; the sintering temperature for the blending and sintering treatment is 350-400℃, and the sintering time is 1 h.

[0039] The preparation method of the bentonite agent in this embodiment is as follows:

[0040] S101: Heat-treat bentonite at 210-220℃ for 1 hour, then cool it to 55-60℃ at a rate of 2-5℃ / min and keep it at that temperature for 2 hours to obtain a heat-insulating bentonite agent.

[0041] S102: The heat-insulating bentonite agent and the measuring liquid are ultrasonically treated at a weight ratio of 3:5. After ultrasonic treatment, the mixture is filtered and dried to obtain the bentonite agent.

[0042] In this embodiment, the ultrasonic power for ultrasonic treatment is 350-400W, and the ultrasonic treatment lasts for 1 hour.

[0043] The measuring solution in this embodiment includes the following raw materials in parts by weight: 2-5 parts diatomaceous earth, 2-4 parts sodium humate, 3-5 parts chitosan solution with a mass fraction of 5%, and 1-3 parts boron nitride.

[0044] The preparation method of a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps:

[0045] Weigh the raw materials according to the specified weight, stir them evenly, and then mold them into a mold to obtain the metallurgical energy-saving composite modified balls of the present invention.

[0046] In this embodiment, the molding pressure is 110-150 MPa, and the molding time is 1 hour.

[0047] Example 1.

[0048] The metallurgical energy-saving composite modified ball of this embodiment includes the following raw materials in parts by weight: 35 parts dolomite powder, 15 parts steel slag powder, 4 parts sodium carboxymethyl starch, 2 parts cellulose ether, 3 parts polyacrylamide, and 3 parts desulfurization ash.

[0049] The metallurgical energy-saving composite modified ball also includes 4 parts modified silicon carbide and 5 parts bentonite agent.

[0050] The viscosity of the cellulose ether in this embodiment is 30000 mPa·s.

[0051] The method for preparing modified silicon carbide in this embodiment is as follows:

[0052] S01: Preheat silicon carbide at 55°C for 1 hour to obtain preheated silicon carbide. Place the preheated silicon carbide in a sodium dodecylbenzenesulfonate solution with a total amount of silicon carbide equal to 3 times the total amount of silicon carbide. Then add 15% of the total amount of silicon carbide silane coupling agent KH550 and stir evenly to obtain silicon carbide liquid.

[0053] S02: Two parts of basalt fiber, one part of mesoporous silica and three parts of lanthanum oxide are blended and sintered. After sintering, a sintered body is obtained.

[0054] S03: Mix 3 parts of dopamine hydrochloride solution, 2 parts of 4% yttrium nitrate solution and 2 parts of titanium dioxide evenly to obtain the modified solution;

[0055] The sintered body and the modified liquid were stirred at a weight ratio of 3:5. After stirring, the modified sintered liquid was obtained.

[0056] S04: Mix silicon carbide liquid and modified sintering liquid at a weight ratio of 5:3 and ball mill them at a speed of 1500 r / min for 2 hours. After ball milling, filter and dry to obtain modified silicon carbide.

[0057] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 3%; the dopamine hydrochloride solution has a mass fraction of 2%.

[0058] In this embodiment, the stirring speed for the stirring treatment is 450 r / min, and the stirring time is 1 h; the sintering temperature for the blending and sintering treatment is 350 °C, and the sintering time is 1 h.

[0059] The preparation method of the bentonite agent in this embodiment is as follows:

[0060] S101: Bentonite is heat-treated at 210℃ for 1 hour, then cooled to 55℃ at a rate of 2℃ / min and kept at that temperature for 2 hours to obtain a heat-insulating bentonite agent.

[0061] S102: The heat-insulating bentonite agent and the measuring liquid are ultrasonically treated at a weight ratio of 3:5. After ultrasonic treatment, the mixture is filtered and dried to obtain the bentonite agent.

[0062] In this embodiment, the ultrasonic power for ultrasonic treatment is 350W, and the ultrasonic treatment lasts for 1 hour.

[0063] The measuring solution in this embodiment includes the following raw materials by weight: 2 parts diatomaceous earth, 2 parts sodium humate, 3 parts chitosan solution with a mass fraction of 5%, and 1 part boron nitride.

[0064] The preparation method of a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps:

[0065] Weigh the raw materials according to the specified weight, stir them evenly, and then mold them into a mold to obtain the metallurgical energy-saving composite modified balls of the present invention.

[0066] In this embodiment, the molding pressure is 110 MPa, and the molding time is 1 hour.

[0067] Example 2.

[0068] The metallurgical energy-saving composite modified ball of this embodiment includes the following raw materials in parts by weight: 40 parts dolomite powder, 20 parts steel slag powder, 8 parts sodium carboxymethyl starch, 4 parts cellulose ether, 5 parts polyacrylamide, and 5 parts desulfurization ash.

[0069] The metallurgical energy-saving composite modified ball also includes 7 parts modified silicon carbide and 8 parts bentonite agent.

[0070] The viscosity of the cellulose ether in this embodiment is 75000 mPa·s.

[0071] The method for preparing modified silicon carbide in this embodiment is as follows:

[0072] S01: Preheat silicon carbide at 60°C for 1 hour to obtain preheated silicon carbide. Place the preheated silicon carbide in a sodium dodecylbenzenesulfonate solution with a total amount of silicon carbide equal to 5 times the total amount of silicon carbide. Then add 20% of the total amount of silicon carbide silane coupling agent KH550 and stir evenly to obtain silicon carbide liquid.

[0073] S02: 5 parts basalt fiber, 3 parts mesoporous silica and 5 parts lanthanum oxide are blended and sintered. After sintering, a sintered body is obtained.

[0074] S03: Mix 3-5 parts of dopamine hydrochloride solution, 2-4 parts of 4% yttrium nitrate solution and 2-3 parts of titanium dioxide evenly to obtain the modified solution;

[0075] The sintered body and the modified liquid were stirred at a weight ratio of 3:5. After stirring, the modified sintered liquid was obtained.

[0076] S04: Mix silicon carbide liquid and modified sintering liquid at a weight ratio of 5:3 and ball mill them at a speed of 1500 r / min for 2 hours. After ball milling, filter and dry to obtain modified silicon carbide.

[0077] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 5%; the dopamine hydrochloride solution has a mass fraction of 4%.

[0078] In this embodiment, the stirring speed for the stirring treatment is 500 r / min, and the stirring time is 1 h; the sintering temperature for the blending and sintering treatment is 400℃, and the sintering time is 1 h.

[0079] The preparation method of the bentonite agent in this embodiment is as follows:

[0080] S101: Bentonite is heat-treated at 220℃ for 1 hour, then cooled to 60℃ at a rate of 5℃ / min and kept at that temperature for 2 hours to obtain a heat-insulating bentonite agent.

[0081] S102: The heat-insulating bentonite agent and the measuring liquid are ultrasonically treated at a weight ratio of 3:5. After ultrasonic treatment, the mixture is filtered and dried to obtain the bentonite agent.

[0082] In this embodiment, the ultrasonic power for ultrasonic treatment is 400W, and the ultrasonic treatment lasts for 1 hour.

[0083] The measuring solution in this embodiment includes the following raw materials by weight: 5 parts diatomaceous earth, 4 parts sodium humate, 5 parts chitosan solution with a mass fraction of 5%, and 3 parts boron nitride.

[0084] The preparation method of a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps:

[0085] Weigh the raw materials according to the specified weight, stir them evenly, and then mold them into a mold to obtain the metallurgical energy-saving composite modified balls of the present invention.

[0086] In this embodiment, the molding pressure is 150 MPa, and the molding time is 1 hour.

[0087] Example 3.

[0088] The metallurgical energy-saving composite modified ball of this embodiment comprises the following raw materials in parts by weight: 37.5 parts dolomite powder, 17.5 parts steel slag powder, 6 parts sodium carboxymethyl starch, 3 parts cellulose ether, 4 parts polyacrylamide, and 4 parts desulfurization ash.

[0089] The metallurgical energy-saving composite modified ball further includes 5.5 parts modified silicon carbide and 6.5 parts bentonite agent.

[0090] The viscosity of the cellulose ether in this embodiment is 45000 mPa·s.

[0091] The method for preparing modified silicon carbide in this embodiment is as follows:

[0092] S01: Preheat silicon carbide at 57°C for 1 hour to obtain preheated silicon carbide. Add the preheated silicon carbide to a sodium dodecylbenzenesulfonate solution with a total volume of 4 times the silicon carbide. Then add 17.5% of the total silicon carbide volume of silane coupling agent KH550 and stir evenly to obtain silicon carbide liquid.

[0093] S02: 3.5 parts basalt fiber, 2 parts mesoporous silica and 4 parts lanthanum oxide are blended and sintered. After sintering, a sintered body is obtained.

[0094] S03: Mix 4 parts of dopamine hydrochloride solution, 3 parts of 4% yttrium nitrate solution and 2.5 parts of titanium dioxide evenly to obtain the modified solution;

[0095] The sintered body and the modified liquid were stirred at a weight ratio of 3:5. After stirring, the modified sintered liquid was obtained.

[0096] S04: Mix silicon carbide liquid and modified sintering liquid at a weight ratio of 5:3 and ball mill them at a speed of 1500 r / min for 2 hours. After ball milling, filter and dry to obtain modified silicon carbide.

[0097] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 4%; the dopamine hydrochloride solution has a mass fraction of 3%.

[0098] In this embodiment, the stirring speed for the stirring treatment is 470 r / min, and the stirring time is 1 h; the sintering temperature for the blending and sintering treatment is 375 °C, and the sintering time is 1 h.

[0099] The preparation method of the bentonite agent in this embodiment is as follows:

[0100] S101: Bentonite is heat-treated at 215℃ for 1 hour, then cooled to 57.5℃ at a rate of 3.5℃ / min and kept at that temperature for 2 hours to obtain a heat-insulating bentonite agent;

[0101] S102: The heat-insulating bentonite agent and the measuring liquid are ultrasonically treated at a weight ratio of 3:5. After ultrasonic treatment, the mixture is filtered and dried to obtain the bentonite agent.

[0102] In this embodiment, the ultrasonic power for ultrasonic treatment is 375W, and the ultrasonic treatment lasts for 1 hour.

[0103] The measuring solution in this embodiment includes the following raw materials by weight: 3.5 parts diatomaceous earth, 3 parts sodium humate, 4 parts chitosan solution with a mass fraction of 5%, and 2 parts boron nitride.

[0104] The preparation method of a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps:

[0105] Weigh the raw materials according to the specified weight, stir them evenly, and then mold them into a mold to obtain the metallurgical energy-saving composite modified balls of the present invention.

[0106] In this embodiment, the molding pressure is 130 MPa, and the molding time is 1 hour.

[0107] Example 4.

[0108] The metallurgical energy-saving composite modified ball of this embodiment includes the following raw materials in parts by weight: 37 parts dolomite powder, 16 parts steel slag powder, 5 parts sodium carboxymethyl starch, 3 parts cellulose ether, 4 parts polyacrylamide, and 4 parts desulfurization ash.

[0109] The metallurgical energy-saving composite modified ball also includes 5 parts modified silicon carbide and 6 parts bentonite agent.

[0110] The viscosity of the cellulose ether in this embodiment is 45000 mPa·s.

[0111] The method for preparing modified silicon carbide in this embodiment is as follows:

[0112] S01: Preheat silicon carbide at 58°C for 1 hour to obtain preheated silicon carbide. Place the preheated silicon carbide in a sodium dodecylbenzenesulfonate solution with a total amount of silicon carbide equal to 4 times the total amount of silicon carbide. Then add silane coupling agent KH550 with a total amount of silicon carbide of 16% and stir evenly to obtain silicon carbide liquid.

[0113] S02: 3 parts basalt fiber, 2 parts mesoporous silica and 4 parts lanthanum oxide are blended and sintered. After sintering, a sintered body is obtained.

[0114] S03: Mix 4 parts of dopamine hydrochloride solution, 3 parts of 4% yttrium nitrate solution and 2 parts of titanium dioxide evenly to obtain the modified solution;

[0115] The sintered body and the modified liquid were stirred at a weight ratio of 3:5. After stirring, the modified sintered liquid was obtained.

[0116] S04: Mix silicon carbide liquid and modified sintering liquid at a weight ratio of 5:3 and ball mill them at a speed of 1500 r / min for 2 hours. After ball milling, filter and dry to obtain modified silicon carbide.

[0117] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 4%; the dopamine hydrochloride solution has a mass fraction of...

[0118] In this embodiment, the stirring speed for the stirring treatment is 460 r / min, and the stirring time is 1 h; the sintering temperature for the blending and sintering treatment is 370 °C, and the sintering time is 1 h.

[0119] The preparation method of the bentonite agent in this embodiment is as follows:

[0120] S101: Bentonite is heat-treated at 212℃ for 1 hour, then cooled to 57℃ at a rate of 3℃ / min and kept at that temperature for 2 hours to obtain a heat-insulating bentonite agent.

[0121] S102: The heat-insulating bentonite agent and the measuring liquid are ultrasonically treated at a weight ratio of 3:5. After ultrasonic treatment, the mixture is filtered and dried to obtain the bentonite agent.

[0122] In this embodiment, the ultrasonic power for ultrasonic treatment is 360W, and the ultrasonic treatment lasts for 1 hour.

[0123] The measuring solution in this embodiment includes the following raw materials by weight: 3 parts diatomaceous earth, 3 parts sodium humate, 4 parts chitosan solution with a mass fraction of 5%, and 2 parts boron nitride.

[0124] The preparation method of a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps:

[0125] Weigh the raw materials according to the specified weight, stir them evenly, and then mold them into a mold to obtain the metallurgical energy-saving composite modified balls of the present invention.

[0126] In this embodiment, the molding pressure is 120 MPa, and the molding time is 1 hour.

[0127] Example 5.

[0128] The metallurgical energy-saving composite modified ball of this embodiment includes the following raw materials in parts by weight: 38 parts dolomite powder, 18 parts steel slag powder, 7 parts sodium carboxymethyl starch, 3 parts cellulose ether, 4 parts polyacrylamide, and 4 parts desulfurization ash.

[0129] The metallurgical energy-saving composite modified ball also includes 6 parts modified silicon carbide and 7 parts bentonite agent.

[0130] The viscosity of the cellulose ether in this embodiment is 55000 mPa·s.

[0131] The method for preparing modified silicon carbide in this embodiment is as follows:

[0132] S01: Preheat silicon carbide at 58°C for 1 hour to obtain preheated silicon carbide. Place the preheated silicon carbide in a sodium dodecylbenzenesulfonate solution with a total amount of silicon carbide equal to 4 times the total amount of silicon carbide. Then add silane coupling agent KH550 with a total amount of silicon carbide of 18% and stir evenly to obtain silicon carbide liquid.

[0133] S02: 4 parts basalt fiber, 2 parts mesoporous silica and 4 parts lanthanum oxide are blended and sintered. After sintering, a sintered body is obtained.

[0134] S03: Mix 4 parts of dopamine hydrochloride solution, 3 parts of 4% yttrium nitrate solution and 3 parts of titanium dioxide evenly to obtain the modified solution;

[0135] The sintered body and the modified liquid were stirred at a weight ratio of 3:5. After stirring, the modified sintered liquid was obtained.

[0136] S04: Mix silicon carbide liquid and modified sintering liquid at a weight ratio of 5:3 and ball mill them at a speed of 1500 r / min for 2 hours. After ball milling, filter and dry to obtain modified silicon carbide.

[0137] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 5%; the dopamine hydrochloride solution has a mass fraction of 4%.

[0138] In this embodiment, the stirring speed for the stirring treatment is 480 r / min, and the stirring time is 1 h; the sintering temperature for the blending and sintering treatment is 390℃, and the sintering time is 1 h.

[0139] The preparation method of the bentonite agent in this embodiment is as follows:

[0140] S101: Bentonite is heat-treated at 218℃ for 1 hour, then cooled to 58℃ at a rate of 4℃ / min and kept at that temperature for 2 hours to obtain a heat-insulating bentonite agent.

[0141] S102: The heat-insulating bentonite agent and the measuring liquid are ultrasonically treated at a weight ratio of 3:5. After ultrasonic treatment, the mixture is filtered and dried to obtain the bentonite agent.

[0142] In this embodiment, the ultrasonic power for ultrasonic treatment is 390W, and the ultrasonic treatment lasts for 1 hour.

[0143] The measuring solution in this embodiment includes the following raw materials by weight: 4 parts diatomaceous earth, 3 parts sodium humate, 4 parts chitosan solution with a mass fraction of 5%, and 2 parts boron nitride.

[0144] The preparation method of a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps:

[0145] Weigh the raw materials according to the specified weight, stir them evenly, and then mold them into a mold to obtain the metallurgical energy-saving composite modified balls of the present invention.

[0146] In this embodiment, the molding pressure is 145 MPa, and the molding time is 1 hour.

[0147] Comparative Example 1.

[0148] Unlike Example 3, no modified silicon carbide was added.

[0149] Comparative Example 2.

[0150] Unlike Example 3, no silicon carbide liquid was added during the preparation of the modified silicon carbide.

[0151] Comparative Example 3.

[0152] Unlike Example 3, no modified sintering solution was added during the preparation of modified silicon carbide.

[0153] Comparative Example 4.

[0154] Unlike Example 3, no sintering body was added in the preparation of the modified sintering solution.

[0155] Comparative Example 5.

[0156] Unlike Example 3, mesoporous silica and lanthanum oxide were not added to the sintered body.

[0157] Comparative Example 6.

[0158] Unlike Example 3, no bentonite agent was added.

[0159] Comparative Example 7.

[0160] Unlike Example 3, no measuring solution was added during the preparation of the bentonite agent.

[0161] Examples 1-5 and Comparative Examples 1-7 underwent routine performance tests, and the products were placed under a 2% sodium hydroxide alkaline mist for 24 hours, followed by treatment under a 5% humidity condition for 24 hours to test their corrosion resistance and moisture resistance stability. The test results are as follows:

[0162] As can be seen from Examples 1-5 and Comparative Examples 1-7, the product of the present invention can achieve coordinated improvement in compressive strength and desulfurization efficiency, while the product has significant corrosion resistance and moisture resistance.

[0163] The product's performance deteriorates significantly if either modified silicon carbide or bentonite is not added. By combining the two in combination, the product's performance is significantly enhanced.

[0164] In the preparation of modified silicon carbide, the absence of silicon carbide liquid, the absence of modified sintering liquid, the absence of sintered body, the absence of mesoporous silica and lanthanum oxide in the sintered body, and the absence of measuring liquid in the preparation of bentonite agent all resulted in a deterioration in product performance. Only the product raw materials obtained by the method of this invention showed the most significant performance improvement.

[0165] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0166] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Metallurgical energy saving composite modified pellets, characterized in that, The composite modified pellet comprises the following raw materials in parts by weight: dolomite powder 35-40 parts, steel slag powder 15-20 parts, sodium carboxymethyl starch 4-8 parts, cellulose ether 2-4 parts, polyacrylamide 3-5 parts, and desulfurized ash 3-5 parts; The metallurgical energy-saving composite modified pellet further comprises 4-7 parts of modified silicon carbide and 5-8 parts of bentonite agent; The preparation method of the modified silicon carbide is as follows: S01: preheat silicon carbide at 55-60℃ for 1h to obtain preheated silicon carbide, then add the preheated silicon carbide into a sodium dodecylbenzenesulfonate solution with 3-5 times the total amount of silicon carbide, and then add 15-20% of the total amount of silicon carbide of silane coupling agent KH550, and stir uniformly to obtain a silicon carbide liquid; S02: blend and sinter 2-5 parts of basalt fiber, 1-3 parts of mesoporous silicon dioxide, and 3-5 parts of lanthanum oxide, and obtain a sintered body after sintering; S03: blend 3-5 parts of a dopamine hydrochloride solution, 2-4 parts of a 4% yttrium nitrate solution by mass fraction, and 2-3 parts of titanium oxide to obtain a modified liquid; stir the sintered body and the modified liquid at a weight ratio of 3:5, and obtain a modified sintered liquid after stirring; S04: mix and ball mill the silicon carbide liquid and the modified sintered liquid at a weight ratio of 5:3, with a ball milling speed of 1500r / min for 2h, and then perform suction filtration and drying to obtain modified silicon carbide.

2. The metallurgical energy saving complex modified globule according to claim 1, wherein, The viscosity of the cellulose ether is 30000-75000mPa.S.

3. The metallurgical energy saving complex modified pellet as claimed in claim 1 wherein, The mass fraction of the sodium dodecylbenzenesulfonate solution is 3-5%, and the mass fraction of the dopamine hydrochloride solution is 2-4%.

4. The metallurgical energy saving complex modified pellet as claimed in claim 1 wherein, The stirring speed of the stirring treatment is 450-500r / min for 1h, and the sintering temperature of the blending and sintering treatment is 350-400℃ for 1h.

5. The metallurgical energy saving compound modified pellet as claimed in claim 1 wherein, The preparation method of the bentonite agent is as follows: S101: heat the bentonite at 210-220℃ for 1h, then cool it to 55-60℃ at a rate of 2-5℃ / min, and keep it at 55-60℃ for 2h to obtain a heat-treated bentonite agent; S102: ultrasonically treat the heat-treated bentonite agent and a weighing liquid at a weight ratio of 3:5, perform suction filtration and drying after ultrasonic treatment to obtain a bentonite agent.

6. The metallurgical energy saving compound modified pellet, according to claim 5, wherein, The ultrasonic power of the ultrasonic treatment is 350-400W for 1h.

7. The metallurgical energy saving compound modified pellet, according to claim 5, wherein, The weighing liquid comprises the following raw materials in parts by weight: 2-5 parts of diatomite, 2-4 parts of sodium humate, 3-5 parts of a 5% chitosan solution by mass fraction, and 1-3 parts of boron nitride.

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