Metallurgical energy-saving composite modified ball and preparation method thereof

Abstract

The metallurgical energy-saving composite modified ball comprises 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 desulfurized fly ash. According to the metallurgical energy-saving composite modified ball, the dolomite powder and the steel slag powder are matched with the sodium carboxymethyl starch and other raw materials, meanwhile, the modified silicon carbide and the bentonite agent are added for blending and optimization, the strength and desulfurization efficiency of the obtained product are improved in a coordinated mode through cooperation of the raw materials, and meanwhile the modified ball is remarkable in corrosion resistance and moisture-proof stability effect.

Description

Technical Field

[0001] The invention relates to the technical field of modified balls, and in particular to a metallurgical energy-saving composite modified ball and a preparation method thereof. Background Art

[0002] Problems existing in the converter process of some enterprises: the slag at the end of converter smelting has high content of iron oxide and manganese oxide, which not only leads to 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 in equilibrium with the excessive iron and manganese oxides in the slag.

[0003] The existing composite modified balls have poor strength performance. 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 use efficiency of the product. Summary of the Invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a metallurgical energy-saving composite modified ball and a preparation method thereof to solve the problems raised in the above background technology.

[0005] The present invention solves the technical problem by adopting the following technical solutions: The present invention provides a metallurgical energy-saving composite modified ball, which comprises 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; The metallurgical energy-saving composite modified ball further comprises 4 to 7 parts of modified silicon carbide and 5 to 8 parts of bentonite.

[0006] Preferably, the viscosity of the cellulose ether is 30,000 to 75,000 mPa.s.

[0007] Preferably, the preparation method of the modified silicon carbide is: S01: Preheat silicon carbide at 55-60°C for 1 hour to obtain preheated silicon carbide, add the preheated silicon carbide into a sodium dodecylbenzene sulfonate solution with a volume of 3-5 times the total volume of silicon carbide, and then add a silane coupling agent KH550 with a volume of 15-20% of the total volume of silicon carbide, stir evenly, and obtain silicon carbide liquid; S02: 2-5 parts of basalt fiber, 1-3 parts of mesoporous silica and 3-5 parts of lanthanum oxide are mixed and sintered until the sintering is completed to obtain a sintered body; S03: 3-5 parts of dopamine hydrochloride solution, 2-4 parts of 4% by mass yttrium nitrate solution and 2-3 parts of titanium oxide are uniformly mixed to obtain a modified solution; The sintered body and the modified liquid are stirred in a weight ratio of 3:5, and the stirring is completed to obtain a modified sintered liquid; S04: The silicon carbide liquid and the modified sintering liquid were mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain modified silicon carbide.

[0008] Preferably, the mass fraction of the sodium dodecylbenzenesulfonate solution is 3-5%; the mass fraction of the dopamine hydrochloride solution is 2-4%.

[0009] Preferably, the stirring speed of the stirring process is 450-500 r / min, and the stirring is performed for 1 hour; the sintering temperature of the blending sintering process is 350-400° C., and the sintering is performed for 1 hour.

[0010] Preferably, the preparation method of the bentonite agent is: S101: heat-treating bentonite at 210-220° C. for 1 hour, then cooling to 55-60° C. at a rate of 2-5° C. / min, and keeping the temperature for 2 hours to obtain a heat-insulated bentonite agent; S102: ultrasonically treat the insulated bentonite and the weighing liquid in a weight ratio of 3:5. After the ultrasonic treatment is completed, the bentonite is filtered and dried to obtain the bentonite.

[0011] Preferably, the ultrasonic treatment is performed at an ultrasonic power of 350-400W for 1 hour.

[0012] Preferably, the measuring solution comprises the following raw materials in parts by weight: 2-5 parts of diatomaceous earth, 2-4 parts of sodium humate, 3-5 parts of 5% by mass chitosan solution and 1-3 parts of boron nitride.

[0013] The present invention also provides a method for preparing a metallurgical energy-saving composite modified ball, comprising the following steps: The raw materials are weighed according to parts by weight, stirred evenly, and then put into a mold for molding to obtain the metallurgical energy-saving composite modified ball of the present invention.

[0014] Preferably, the molding process has a molding pressure of 110-150 MPa and a molding time of 1 hour.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The metallurgical energy-saving composite modified ball of the present invention adopts raw materials such as dolomite powder and steel slag powder in combination with sodium carboxymethyl starch, and is simultaneously added with modified silicon carbide and bentonite agent for blending and optimization. Through the synergistic combination of the raw materials, the strength and desulfurization efficiency of the obtained product are coordinated and improved. At the same time, the corrosion resistance and moisture resistance of the modified ball are significantly improved. The modified silicon carbide is preheated with silicon carbide diamond wire, and then blended with sodium dodecylbenzene sulfonate solution and silane coupling agent. At the same time, the modified sintering liquid is ball-milled and improved. The sintered body in the modified sintering liquid is improved and optimized with the modified liquid. Through the synergistic combination of the raw materials, the sintering liquid is preheated with silicon carbide diamond wire, and the modified silicon carbide is preheated with sodium dodecylbenzene sulfonate solution and silane coupling agent. The basalt fiber in the body is combined with mesoporous silica and lanthanum oxide raw materials, and the modified liquid is improved by blending dopamine hydrochloride solution, 4% by mass yttrium nitrate solution and titanium oxide. The modified silicon carbide obtained by the co-coordination between the raw materials optimizes the performance coordination and performance stability of the product in the system. At the same time, the bentonite in the bentonite agent is thermally improved to optimize its interlamellar spacing and interlamellar activity. At the same time, after the blending optimization improvement of diatomaceous earth and boron nitride and other raw materials in the measuring liquid, the coordination effect of the obtained bentonite agent and modified silicon carbide is better, and the performance of the product is further improved. DETAILED DESCRIPTION

[0016] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The metallurgical energy-saving composite modified ball of this embodiment comprises 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; The metallurgical energy-saving composite modified ball further comprises 4 to 7 parts of modified silicon carbide and 5 to 8 parts of bentonite.

[0018] The viscosity of the cellulose ether in this embodiment is 30,000 to 75,000 mPa.s.

[0019] The preparation method of the modified silicon carbide of this embodiment is: S01: Preheat silicon carbide at 55-60°C for 1 hour to obtain preheated silicon carbide, add the preheated silicon carbide into a sodium dodecylbenzene sulfonate solution with a volume of 3-5 times the total volume of silicon carbide, and then add a silane coupling agent KH550 with a volume of 15-20% of the total volume of silicon carbide, stir evenly, and obtain silicon carbide liquid; S02: 2-5 parts of basalt fiber, 1-3 parts of mesoporous silica and 3-5 parts of lanthanum oxide are mixed and sintered until the sintering is completed to obtain a sintered body; S03: 3-5 parts of dopamine hydrochloride solution, 2-4 parts of 4% by mass yttrium nitrate solution and 2-3 parts of titanium oxide are uniformly mixed to obtain a modified solution; The sintered body and the modified liquid are stirred in a weight ratio of 3:5, and the stirring is completed to obtain a modified sintered liquid; S04: The silicon carbide liquid and the modified sintering liquid were mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain modified silicon carbide.

[0020] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 3-5%; the mass fraction of the dopamine hydrochloride solution is 2-4%.

[0021] In the present embodiment, the stirring speed of the stirring treatment is 450-500 r / min, and the stirring is performed for 1 hour. The sintering temperature of the blending sintering treatment is 350-400° C., and the sintering is performed for 1 hour.

[0022] The preparation method of the bentonite agent of the present embodiment is: S101: heat-treating bentonite at 210-220° C. for 1 hour, then cooling to 55-60° C. at a rate of 2-5° C. / min, and keeping the temperature for 2 hours to obtain a heat-insulated bentonite agent; S102: ultrasonically treat the insulated bentonite and the weighing liquid in a weight ratio of 3:5. After the ultrasonic treatment is completed, the bentonite is filtered and dried to obtain the bentonite.

[0023] The ultrasonic treatment in this embodiment has an ultrasonic power of 350-400 W and is carried out for 1 hour.

[0024] The measuring solution of this embodiment includes the following raw materials in parts by weight: 2-5 parts of diatomaceous earth, 2-4 parts of sodium humate, 3-5 parts of 5% by mass chitosan solution, and 1-3 parts of boron nitride.

[0025] A method for preparing a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps: The raw materials are weighed according to parts by weight, stirred evenly, and then put into a mold for molding to obtain the metallurgical energy-saving composite modified ball of the present invention.

[0026] The molding process in this embodiment has a molding pressure of 110-150 MPa and a molding time of 1 hour.

[0027] Example 1.

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

[0029] The viscosity of the cellulose ether in this embodiment is 30,000 mPa.s.

[0030] The preparation method of the modified silicon carbide of this embodiment is: S01: Preheat silicon carbide at 55°C for 1 hour to obtain preheated silicon carbide, dissolve the preheated silicon carbide in a sodium dodecylbenzene sulfonate solution 3 times the total amount of silicon carbide, and then add a silane coupling agent KH550 at 15% of the total amount of silicon carbide, stir evenly, and obtain silicon carbide liquid; S02: 2 parts of basalt fiber, 1 part of mesoporous silica and 3 parts of lanthanum oxide are mixed and sintered, and the sintering is completed to obtain a sintered body; S03: 3 parts of dopamine hydrochloride solution, 2 parts of 4% by mass yttrium nitrate solution and 2 parts of titanium oxide are uniformly mixed to obtain a modified solution; The sintered body and the modified liquid are stirred in a weight ratio of 3:5, and the stirring is completed to obtain a modified sintered liquid; S04: The silicon carbide liquid and the modified sintering liquid were mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain modified silicon carbide.

[0031] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 3%; the mass fraction of the dopamine hydrochloride solution is 2%.

[0032] The stirring speed of the stirring process in this embodiment is 450 r / min, and the stirring is performed for 1 hour; the sintering temperature of the blending sintering process is 350° C., and the sintering is performed for 1 hour.

[0033] The preparation method of the bentonite agent of the present embodiment is: S101: heat-treating bentonite at 210°C for 1 hour, then cooling to 55°C at a rate of 2°C / min, and keeping the temperature for 2 hours to obtain a heat-insulated bentonite agent; S102: ultrasonically treat the insulated bentonite and the weighing liquid in a weight ratio of 3:5. After the ultrasonic treatment is completed, the bentonite is filtered and dried to obtain the bentonite.

[0034] The ultrasonic treatment in this embodiment was performed with an ultrasonic power of 350 W and for 1 hour.

[0035] The measuring solution of this embodiment includes the following raw materials in parts by weight: 2 parts of diatomaceous earth, 2 parts of sodium humate, 3 parts of 5% by mass chitosan solution and 1 part of boron nitride.

[0036] A method for preparing a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps: The raw materials are weighed according to parts by weight, stirred evenly, and then put into a mold for molding to obtain the metallurgical energy-saving composite modified ball of the present invention.

[0037] The molding process in this embodiment has a molding pressure of 110 MPa and a molding time of 1 hour.

[0038] Example 2. The metallurgical energy-saving composite modified ball of this embodiment comprises the following raw materials in parts by weight: 40 parts of dolomite powder, 20 parts of steel slag powder, 8 parts of sodium carboxymethyl starch, 4 parts of cellulose ether, 5 parts of polyacrylamide and 5 parts of desulfurization ash; The metallurgical energy-saving composite modified ball further comprises 7 parts of modified silicon carbide and 8 parts of bentonite.

[0039] The viscosity of the cellulose ether in this embodiment is 75000 mPa.s.

[0040] The preparation method of the modified silicon carbide of this embodiment is: S01: Preheat silicon carbide at 60°C for 1 hour to obtain preheated silicon carbide, add the preheated silicon carbide into a sodium dodecylbenzene sulfonate solution with a volume of 5 times the total volume of silicon carbide, and then add a silane coupling agent KH550 with a volume of 20% of the total volume of silicon carbide, stir evenly, and obtain silicon carbide liquid; S02: 5 parts of basalt fiber, 3 parts of mesoporous silica and 5 parts of lanthanum oxide are mixed and sintered, and the sintering is completed to obtain a sintered body; S03: 3-5 parts of dopamine hydrochloride solution, 2-4 parts of 4% by mass yttrium nitrate solution and 2-3 parts of titanium oxide are uniformly mixed to obtain a modified solution; The sintered body and the modified liquid are stirred in a weight ratio of 3:5, and the stirring is completed to obtain a modified sintered liquid; S04: The silicon carbide liquid and the modified sintering liquid were mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain modified silicon carbide.

[0041] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 5%; the mass fraction of the dopamine hydrochloride solution is 4%.

[0042] In the present embodiment, the stirring speed of the stirring treatment is 500 r / min, and the stirring is performed for 1 hour; the sintering temperature of the blending sintering treatment is 400° C., and the sintering is performed for 1 hour.

[0043] The preparation method of the bentonite agent of the present embodiment is: S101: heat-treating bentonite at 220°C for 1 hour, then cooling to 60°C at a rate of 5°C / min, and keeping the temperature for 2 hours to obtain a heat-insulated bentonite agent; S102: ultrasonically treat the insulated bentonite and the weighing liquid in a weight ratio of 3:5. After the ultrasonic treatment is completed, the bentonite is filtered and dried to obtain the bentonite.

[0044] The ultrasonic treatment in this embodiment was performed with an ultrasonic power of 400 W and ultrasonic treatment for 1 hour.

[0045] The measuring solution of this embodiment includes the following raw materials in parts by weight: 5 parts of diatomaceous earth, 4 parts of sodium humate, 5 parts of 5% chitosan solution by mass, and 3 parts of boron nitride.

[0046] A method for preparing a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps: The raw materials are weighed according to parts by weight, stirred evenly, and then put into a mold for molding to obtain the metallurgical energy-saving composite modified ball of the present invention.

[0047] The molding process in this embodiment has a molding pressure of 150 MPa and a molding time of 1 hour.

[0048] Example 3. The metallurgical energy-saving composite modified ball of this embodiment comprises the following raw materials in parts by weight: 37.5 parts of dolomite powder, 17.5 parts of steel slag powder, 6 parts of sodium carboxymethyl starch, 3 parts of cellulose ether, 4 parts of polyacrylamide and 4 parts of desulfurization ash; The metallurgical energy-saving composite modified ball further comprises 5.5 parts of modified silicon carbide and 6.5 parts of bentonite.

[0049] The viscosity of the cellulose ether in this embodiment is 45000 mPa.s.

[0050] The preparation method of the modified silicon carbide of this embodiment is: S01: Preheat silicon carbide at 57°C for 1 hour to obtain preheated silicon carbide, dissolve the preheated silicon carbide in a sodium dodecylbenzene sulfonate solution at a concentration of 4 times the total amount of silicon carbide, and then add a silane coupling agent KH550 at a concentration of 17.5% of the total amount of silicon carbide, stir evenly, and obtain silicon carbide liquid; S02: 3.5 parts of basalt fiber, 2 parts of mesoporous silica and 4 parts of lanthanum oxide are mixed and sintered, and the sintering is completed to obtain a sintered body; S03: 4 parts of dopamine hydrochloride solution, 3 parts of 4% by mass yttrium nitrate solution and 2.5 parts of titanium oxide are uniformly mixed to obtain a modified solution; The sintered body and the modified liquid are stirred in a weight ratio of 3:5, and the stirring is completed to obtain a modified sintered liquid; S04: The silicon carbide liquid and the modified sintering liquid were mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain modified silicon carbide.

[0051] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 4%; the mass fraction of the dopamine hydrochloride solution is 3%.

[0052] The stirring speed of the stirring process in this embodiment is 470 r / min, and the stirring is performed for 1 hour; the sintering temperature of the blending sintering process is 375° C., and the sintering is performed for 1 hour.

[0053] The preparation method of the bentonite agent of the present embodiment is: S101: heat-treating bentonite at 215°C for 1 hour, then cooling to 57.5°C at a rate of 3.5°C / min, and keeping the temperature for 2 hours to obtain a heat-insulated bentonite agent; S102: ultrasonically treat the insulated bentonite and the weighing liquid in a weight ratio of 3:5. After the ultrasonic treatment is completed, the bentonite is filtered and dried to obtain the bentonite.

[0054] The ultrasonic treatment in this embodiment was performed at an ultrasonic power of 375 W and for 1 hour.

[0055] The measuring solution of this embodiment includes the following raw materials in parts by weight: 3.5 parts of diatomaceous earth, 3 parts of sodium humate, 4 parts of 5% by mass chitosan solution, and 2 parts of boron nitride.

[0056] A method for preparing a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps: The raw materials are weighed according to parts by weight, stirred evenly, and then put into a mold for molding to obtain the metallurgical energy-saving composite modified ball of the present invention.

[0057] The molding process in this embodiment has a molding pressure of 130 MPa and a molding time of 1 hour.

[0058] Example 4. The metallurgical energy-saving composite modified ball of this embodiment comprises the following raw materials in parts by weight: 37 parts of dolomite powder, 16 parts of steel slag powder, 5 parts of sodium carboxymethyl starch, 3 parts of cellulose ether, 4 parts of polyacrylamide and 4 parts of desulfurization ash; The metallurgical energy-saving composite modified ball further comprises 5 parts of modified silicon carbide and 6 parts of bentonite.

[0059] The viscosity of the cellulose ether in this embodiment is 45000 mPa.s.

[0060] The preparation method of the modified silicon carbide of this embodiment is: S01: Preheat silicon carbide at 58°C for 1 hour to obtain preheated silicon carbide, dissolve the preheated silicon carbide in a sodium dodecylbenzene sulfonate solution at a concentration of 4 times the total amount of silicon carbide, and then add a silane coupling agent KH550 at a concentration of 16% of the total amount of silicon carbide, stir evenly, and obtain silicon carbide liquid; S02: 3 parts of basalt fiber, 2 parts of mesoporous silica and 4 parts of lanthanum oxide are mixed and sintered, and the sintering is completed to obtain a sintered body; S03: 4 parts of dopamine hydrochloride solution, 3 parts of 4% by mass yttrium nitrate solution and 2 parts of titanium oxide are uniformly mixed to obtain a modified solution; The sintered body and the modified liquid are stirred in a weight ratio of 3:5, and the stirring is completed to obtain a modified sintered liquid; S04: The silicon carbide liquid and the modified sintering liquid were mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain modified silicon carbide.

[0061] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 4%; the mass fraction of the dopamine hydrochloride solution is The stirring speed of the stirring process in this embodiment is 460 r / min, and the stirring is performed for 1 hour; the sintering temperature of the blending sintering process is 370° C., and the sintering is performed for 1 hour.

[0062] The preparation method of the bentonite agent of the present embodiment is: S101: heat-treating bentonite at 212°C for 1 hour, then cooling to 57°C at a rate of 3°C / min, and keeping the temperature for 2 hours to obtain a heat-insulated bentonite agent; S102: ultrasonically treat the insulated bentonite and the weighing liquid in a weight ratio of 3:5. After the ultrasonic treatment is completed, the bentonite is filtered and dried to obtain the bentonite.

[0063] The ultrasonic treatment in this embodiment was performed with an ultrasonic power of 360 W and for 1 hour.

[0064] The measuring solution of this embodiment includes the following raw materials in parts by weight: 3 parts of diatomaceous earth, 3 parts of sodium humate, 4 parts of 5% by mass chitosan solution, and 2 parts of boron nitride.

[0065] A method for preparing a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps: The raw materials are weighed according to parts by weight, stirred evenly, and then put into a mold for molding to obtain the metallurgical energy-saving composite modified ball of the present invention.

[0066] The molding process in this embodiment has a molding pressure of 120 MPa and a molding time of 1 hour.

[0067] Example 5. The metallurgical energy-saving composite modified ball of this embodiment comprises the following raw materials in parts by weight: 38 parts of dolomite powder, 18 parts of steel slag powder, 7 parts of sodium carboxymethyl starch, 3 parts of cellulose ether, 4 parts of polyacrylamide and 4 parts of desulfurization ash; The metallurgical energy-saving composite modified ball further comprises 6 parts of modified silicon carbide and 7 parts of bentonite.

[0068] The viscosity of the cellulose ether in this example is 55000 mPa.s.

[0069] The preparation method of the modified silicon carbide of this embodiment is: S01: Preheat silicon carbide at 58°C for 1 hour to obtain preheated silicon carbide, dissolve the preheated silicon carbide in a sodium dodecylbenzene sulfonate solution at a concentration of 4 times the total amount of silicon carbide, and then add a silane coupling agent KH550 at a concentration of 18% of the total amount of silicon carbide, stir evenly, and obtain silicon carbide liquid; S02: 4 parts of basalt fiber, 2 parts of mesoporous silica and 4 parts of lanthanum oxide are mixed and sintered, and the sintering is completed to obtain a sintered body; S03: 4 parts of dopamine hydrochloride solution, 3 parts of 4% by mass yttrium nitrate solution and 3 parts of titanium oxide are uniformly mixed to obtain a modified solution; The sintered body and the modified liquid are stirred in a weight ratio of 3:5, and the stirring is completed to obtain a modified sintered liquid; S04: The silicon carbide liquid and the modified sintering liquid were mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain modified silicon carbide.

[0070] The mass fraction of the sodium dodecylbenzenesulfonate solution in this embodiment is 5%; the mass fraction of the dopamine hydrochloride solution is 4%.

[0071] The stirring speed of the stirring process in this embodiment is 480 r / min, and the stirring is performed for 1 hour; the sintering temperature of the blending sintering process is 390° C., and the sintering is performed for 1 hour.

[0072] The preparation method of the bentonite agent of the present embodiment is: S101: heat-treating bentonite at 218°C for 1 hour, then cooling to 58°C at a rate of 4°C / min, and keeping the temperature for 2 hours to obtain a heat-insulated bentonite agent; S102: ultrasonically treat the insulated bentonite and the weighing liquid in a weight ratio of 3:5. After the ultrasonic treatment is completed, the bentonite is filtered and dried to obtain the bentonite.

[0073] The ultrasonic treatment in this embodiment was performed with an ultrasonic power of 390 W and for 1 hour.

[0074] The measuring solution of this embodiment includes the following raw materials in parts by weight: 4 parts of diatomaceous earth, 3 parts of sodium humate, 4 parts of 5% by mass chitosan solution, and 2 parts of boron nitride.

[0075] A method for preparing a metallurgical energy-saving composite modified ball according to this embodiment includes the following steps: The raw materials are weighed according to parts by weight, stirred evenly, and then put into a mold for molding to obtain the metallurgical energy-saving composite modified ball of the present invention.

[0076] The molding process in this embodiment has a molding pressure of 145 MPa and a molding time of 1 hour.

[0077] Comparative Example 1. The difference from Example 3 is that no modified silicon carbide is added.

[0078] Comparative Example 2. The difference from Example 3 is that no silicon carbide liquid is added during the preparation of the modified silicon carbide.

[0079] Comparative Example 3. Different from Example 3, no modified sintering liquid was added during the preparation of modified silicon carbide.

[0080] Comparative Example 4. The difference from Example 3 is that no sintered body is added in the preparation of the modified sintering liquid.

[0081] Comparative Example 5. The difference from Example 3 is that mesoporous silica and lanthanum oxide are not added to the sintered body.

[0082] Comparative Example 6. The difference from Example 3 is that no bentonite agent was added.

[0083] Comparative Example 7. The difference from Example 3 is that no measuring liquid is added during the preparation of the bentonite agent.

[0084] Examples 1-5 and Comparative Examples 1-7 were subjected to conventional performance tests, and were placed in a 2% sodium hydroxide alkaline mist for 24 hours and then treated at a 5% humidity for 24 hours to test the corrosion resistance and moisture resistance of the products. The test results are as follows:

[0085] From Examples 1-5 and Comparative Examples 1-7, it can be concluded that 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. Without adding modified silicon carbide or bentonite, the performance of the product deteriorates significantly. The synergistic effect of the two agents is the most significant. When no silicon carbide liquid is added to the preparation of modified silicon carbide, no modified sintering liquid is added to the preparation of modified silicon carbide, no sintered body is added to the preparation of modified sintering liquid, no mesoporous silica and lanthanum oxide are added to the sintered body, and no weighing liquid is added to the preparation of bentonite agent, the performance of the products tends to deteriorate. Only the product raw materials obtained by the method of the present invention have the most significant product performance effect.

[0086] 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 embodied 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 illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0087] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Metallurgical energy-saving composite modified ball, characterized in that: The composite modified ball comprises 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; The metallurgical energy-saving composite modified ball further comprises 4 to 7 parts of modified silicon carbide and 5 to 8 parts of bentonite.

2. The metallurgical energy-saving composite modified ball according to claim 1, characterized in that: The viscosity of the cellulose ether is 30,000 to 75,000 mPa.s.

3. The metallurgical energy-saving composite modified ball according to claim 1, characterized in that: The preparation method of the modified silicon carbide is: S01: Preheat silicon carbide at 55-60°C for 1 hour to obtain preheated silicon carbide, add the preheated silicon carbide into a sodium dodecylbenzene sulfonate solution with a volume of 3-5 times the total volume of silicon carbide, and then add a silane coupling agent KH550 with a volume of 15-20% of the total volume of silicon carbide, stir evenly, and obtain silicon carbide liquid; S02: 2-5 parts of basalt fiber, 1-3 parts of mesoporous silica and 3-5 parts of lanthanum oxide are mixed and sintered until the sintering is completed to obtain a sintered body; S03: 3-5 parts of dopamine hydrochloride solution, 2-4 parts of 4% by mass yttrium nitrate solution and 2-3 parts of titanium oxide are uniformly mixed to obtain a modified solution; The sintered body and the modified liquid are stirred in a weight ratio of 3:5, and the stirring is completed to obtain a modified sintered liquid; S04: The silicon carbide liquid and the modified sintering liquid were mixed in a weight ratio of 5:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling was completed, the mixture was filtered and dried to obtain modified silicon carbide.

4. The metallurgical energy-saving composite modified ball according to claim 3, characterized in that: The mass fraction of the sodium dodecylbenzenesulfonate solution is 3-5%; the mass fraction of the dopamine hydrochloride solution is 2-4%.

5. The metallurgical energy-saving composite modified ball according to claim 3, characterized in that: The stirring speed of the stirring treatment is 450-500 r / min, and the stirring is performed for 1 hour; the sintering temperature of the blending sintering treatment is 350-400° C., and the sintering is performed for 1 hour.

6. The metallurgical energy-saving composite modified ball according to claim 1, characterized in that: The preparation method of the bentonite agent is: S101: heat-treating bentonite at 210-220° C. for 1 hour, then cooling to 55-60° C. at a rate of 2-5° C. / min, and keeping the temperature for 2 hours to obtain a heat-insulated bentonite agent; S102: ultrasonically treat the insulated bentonite and the weighing liquid in a weight ratio of 3:

5. After the ultrasonic treatment is completed, the bentonite is filtered and dried to obtain the bentonite.

7. The metallurgical energy-saving composite modified ball according to claim 6, characterized in that: The ultrasonic treatment was performed at an ultrasonic power of 350-400W for 1 hour.

8. The metallurgical energy-saving composite modified ball according to claim 6, characterized in that: The measuring solution comprises the following raw materials in parts by weight: 2-5 parts of diatomaceous earth, 2-4 parts of sodium humate, 3-5 parts of chitosan solution with a mass fraction of 5%, and 1-3 parts of boron nitride.

9. The method for preparing a metallurgical energy-saving composite modified ball according to any one of claims 1 to 8, characterized in that: The following steps are involved: The raw materials are weighed according to parts by weight, stirred evenly, and then put into a mold for molding to obtain the metallurgical energy-saving composite modified ball of the present invention.

10. The method for preparing a metallurgical energy-saving composite modified ball according to claim 9, characterized in that: The molding process is performed at a molding pressure of 110-150 MPa and the molding time is 1 hour.

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