CN114737055A - High-purity composite binder for metallurgical pellets and use method thereof - Google Patents
High-purity composite binder for metallurgical pellets and use method thereof Download PDFInfo
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- CN114737055A CN114737055A CN202210509654.1A CN202210509654A CN114737055A CN 114737055 A CN114737055 A CN 114737055A CN 202210509654 A CN202210509654 A CN 202210509654A CN 114737055 A CN114737055 A CN 114737055A
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- 239000011230 binding agent Substances 0.000 title claims abstract description 75
- 239000008188 pellet Substances 0.000 title claims abstract description 74
- 239000002131 composite material Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000002028 Biomass Substances 0.000 claims abstract description 22
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229920005610 lignin Polymers 0.000 claims abstract description 20
- 229920002472 Starch Polymers 0.000 claims abstract description 10
- 235000019698 starch Nutrition 0.000 claims abstract description 10
- 239000008107 starch Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 31
- 238000003825 pressing Methods 0.000 claims description 22
- 239000003921 oil Substances 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 15
- 229920001592 potato starch Polymers 0.000 claims description 12
- 229920002261 Corn starch Polymers 0.000 claims description 10
- 239000008120 corn starch Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 235000013312 flour Nutrition 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 7
- 244000017020 Ipomoea batatas Species 0.000 claims description 6
- 235000002678 Ipomoea batatas Nutrition 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229920001732 Lignosulfonate Polymers 0.000 claims description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- 235000021307 Triticum Nutrition 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 240000003183 Manihot esculenta Species 0.000 claims description 3
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229920002488 Hemicellulose Polymers 0.000 claims description 2
- 240000004922 Vigna radiata Species 0.000 claims description 2
- 235000010721 Vigna radiata var radiata Nutrition 0.000 claims description 2
- 235000011469 Vigna radiata var sublobata Nutrition 0.000 claims description 2
- 229920005551 calcium lignosulfonate Polymers 0.000 claims description 2
- 239000001913 cellulose Substances 0.000 claims description 2
- 229920002678 cellulose Polymers 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- 239000007857 degradation product Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 239000010902 straw Substances 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 239000004117 Lignosulphonate Substances 0.000 claims 1
- 244000098338 Triticum aestivum Species 0.000 claims 1
- 239000007864 aqueous solution Substances 0.000 claims 1
- 235000019357 lignosulphonate Nutrition 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 238000005979 thermal decomposition reaction Methods 0.000 claims 1
- 239000011882 ultra-fine particle Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 12
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000010310 metallurgical process Methods 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 23
- 239000002699 waste material Substances 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 238000007670 refining Methods 0.000 description 14
- 239000002893 slag Substances 0.000 description 14
- 229910052710 silicon Inorganic materials 0.000 description 12
- 239000010703 silicon Substances 0.000 description 12
- 239000011863 silicon-based powder Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 8
- 229910000720 Silicomanganese Inorganic materials 0.000 description 8
- 239000000571 coke Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 241000209140 Triticum Species 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002956 ash Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000027455 binding Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 235000012907 honey Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A high-purity composite binder for metallurgical pellets and a use method thereof belong to the technical field of environmental protection and metallurgy. The composite adhesive is prepared from four components of starch, lignin, silica sol and biomass oil according to the characteristics and use requirements of an adhesive object. The high-purity composite binder can ensure the cold strength and the high-temperature strength of the pellets, reduce various impurities of metal elements which are not needed in the metallurgical process, is favorable for efficiently utilizing various powder materials, protects the environment and improves the resource utilization rate. Improves the service performance of various metallurgical pellets and greatly expands the service occasions of various powder materials.
Description
Technical Field
The invention relates to a high-purity composite binder for metallurgical pellets, belonging to the environmental protection and metallurgy technology.
Background
Various metal-containing powder materials such as furnace dust, rolled steel sheet, scrap iron, sludge, return ores, micro silicon powder, steel slag, smelting slag, dust removal ash and the like generated in the metallurgical industry and various carbonaceous reducing agents such as charcoal, coal, coke, wood chips and the like. The powder can be reused by a pelletizing preparation mode, so that the environmental protection cost can be reduced, and the resource utilization rate of metal and carbonaceous reducing agents can be improved.
The metallurgical pellets are commonly used as inorganic binders and organic binders. Common inorganic binders are: sodium silicate, potassium silicate, bentonite, fluorite powder, montmorillonite, clay, sodium carbonate, sodium hydroxide, cement, micro silicon powder and the like.Common organic binders are: organic binder: wheat flour, cassava flour, honey waste liquid, tar, paper pulp and polyvinyl alcohol. In the case of inorganic binders, certain metallurgical processes may be contaminated or affected by the presence of some metal impurities. For example, Al in bentonite as an inorganic binder2O3High content, slag formation in the general smelting process, and improper allocation can improve the energy consumption and the power consumption in the furnace. The organic binder has the problems of ineffective binding action at high temperature and reduced high-temperature strength of the pellets.
Disclosure of Invention
The invention aims to provide a high-purity composite binder for metallurgical pellets and a using method thereof.
The invention relates to a high-purity composite binder for metallurgical pellets and a using method thereof, wherein the high-purity composite binder for metallurgical pellets comprises the following components in percentage by mass of the total mass of pellet raw materials: 0.1-25% of starch, 0.1-25% of lignin, 0.1-25% of silica sol and 0.1-30% of biomass oil.
The invention relates to a using method of a high-purity composite binder for metallurgical pellets, which comprises the following steps:
uniformly mixing the components of the composite binder according to the proportion;
step (2) uniformly mixing the composite binder obtained in the step (1) with a pellet raw material, and adding a proper amount of water when needed;
step (3) performing pressure forming on the mixture obtained in the step (2), and drying to obtain a metallurgical pellet;
the particle size of the pellet raw material particles in the step (2) is less than or equal to 7 mm;
the process of uniformly mixing the composite binder and the pellet raw materials in the step (2) is executed by various mixing machines or various manual mixing processes;
the pellet pressure forming process in the step (3) can be executed by various ball pressing machines or various simple manual ball pressing devices.
Compared with the existing adhesive, the composite adhesive has the following advantages: 1) the content of metal elements is low, so that the method can be applied to most occasions needing early ball production without worrying about pollution or other influences of the metal elements on the production process; 2) the composite binder can improve the cold and hot strength of the pellets, can not generate a large amount of powder due to insufficient strength in a cold state, and can not reduce the strength due to the failure of the organic binder at a high temperature. Therefore, the invention has wide use scenes and good use performance. The high-purity composite binder provided by the invention can reduce various impurities of unnecessary metal elements brought into the metallurgical process, and can ensure the cold strength and the high-temperature strength of the pellets. Is beneficial to efficiently utilizing various powder materials, protects the environment and improves the resource utilization rate.
Detailed Description
The invention relates to a high-purity composite binder for metallurgical pellets and a using method thereof, wherein the high-purity composite binder for metallurgical pellets comprises the following components in percentage by mass of the total mass of pellet raw materials: 0.1-25% of starch, 0.1-25% of lignin, 0.1-25% of silica sol and 0.1-30% of biomass oil.
The component starch of the composite binder is corn starch, or potato starch, or sweet potato starch, or tapioca flour, or mung bean starch, or wheat flour, or a mixture of one or more of the above starches.
The composite binder comprises the components of lignin, namely sodium lignosulfonate, calcium lignosulfonate, potassium lignosulfonate, or one or more of the lignin.
The composite adhesive contains silica sol as the component of colloidal water solution of superfine silica particle and SiO2The content is 10-60% by mass.
The composite binder is obtained by thermally decomposing the biomass oil component of various woods, crop straws and processing residues of agricultural and forestry products, and is a mixture consisting of various degradation products of cellulose, hemicellulose and lignin, namely macromolecular organic matters and water.
The falling strength of the metallurgical pellets prepared by the composite binder is greater than or equal to 86%.
The compressive strength of the metallurgical pellets prepared by using the composite binder is greater than or equal to 10 MPa.
The drum strength of the composite binder is more than or equal to 85 percent after the metallurgical pellets prepared by the binder are heated.
The use method of the high-purity composite binder for the metallurgical pellets comprises the following steps:
uniformly mixing the components of the composite binder according to the proportion;
step (2) uniformly mixing the composite binder obtained in the step (1) with a pellet raw material, and adding a proper amount of water when needed;
step (3) performing pressure forming on the mixture obtained in the step (2), and drying to obtain a metallurgical pellet;
the particle size of the pellet raw material particles in the step (2) is less than or equal to 7 mm;
the process of uniformly mixing the composite binder and the pellet raw materials in the step (2) is executed by various mixing machines or various manual mixing processes;
the pellet pressure forming process in the step (3) can be executed by various ball pressing machines or various simple manual ball pressing devices.
The invention will be further developed by reference to the following examples. Example 1:
waste micro silicon powder is selected as a raw material. The high-purity composite binder consists of corn starch, sodium lignosulphonate, silica sol and biomass oil, and the dosage of the high-purity composite binder is calculated by the total mass percentage of the micro silicon powder: 2% of corn starch, 1.5% of sodium lignosulfonate, 0.5% of silica sol and 12% of biomass oil. Uniformly mixing the components of the composite binder according to the proportion, and uniformly mixing the components and the waste mixture in a mixer for 6 min; and pressing the uniformly mixed materials into pellets under the pressure of 25 MPa. The pellets obtained by pressing were dried and then subjected to various strength tests. The results are as follows: the falling strength is 98.2 percent, the compressive strength is 26.3MPa, and the drum strength is 89.2 percent after heating at 1100 ℃. The pellet can be used in the processes of molten steel refining, industrial silicon production, industrial silicon refining, and industrial ferrosilicon and silicomanganese production.
Example 2:
waste micro silicon powder and smelting slag are selected as raw materials. The high-purity composite binder consists of potato starch, lignin, silica sol and biomass oil, and the dosage of the high-purity composite binder is calculated by the total mass percentage of the micro silicon powder and the smelting slag: 5.5% of potato starch, 7% of lignin, 1.5% of silica sol and 3% of biomass oil. Uniformly mixing the components of the composite binder according to the proportion, and uniformly mixing the components and the waste mixture in a mixer for 5 min; and pressing the uniformly mixed materials into pellets under the pressure of 15 MPa. The pellets obtained by pressing were dried and then subjected to various strength tests. The results are as follows: the falling strength is 97.7 percent, the compressive strength is 19.3MPa, and the drum strength after heating at 1100 ℃ is 86.9 percent. The pellet can be used in the processes of molten steel refining, industrial silicon refining, industrial ferrosilicon and silicomanganese production.
Example 3:
waste micro silicon powder and coal cinder are selected as raw materials. The high-purity composite binder consists of corn starch, sweet potato starch, potassium lignosulfonate, silica sol and biomass oil, and the dosage of the high-purity composite binder is calculated by the total mass percentage of the micro silicon powder and the coal cinder: 1.5% of corn starch, 1% of sweet potato starch, 1% of potassium lignosulfonate, 1.5% of silica sol and 2% of biomass oil. Uniformly mixing the components of the composite binder according to the proportion, and uniformly mixing the components and the waste mixture in a mixer for 15 min; and pressing the uniformly mixed materials into pellets under the pressure of 20 MPa. The pellets obtained by pressing were dried and then subjected to various strength tests. The results are as follows: the falling strength is 95.7 percent, the compressive strength is 18.3MPa, and the drum strength is 85.0 percent after heating at 1100 ℃. The pellet can be used in the processes of molten steel refining, industrial silicon production, industrial silicon refining, and industrial ferrosilicon and silicomanganese production.
Example 4:
waste steelmaking fly ash and steel slag are selected as raw materials. The high-purity composite binder consists of potato starch, lignin, silica sol and biomass oil, and the dosage of the high-purity composite binder is calculated by the total mass percentage of the micro silicon powder and the steel slag: 5% of potato starch, 1% of lignin, 0.5% of silica sol and 3% of biomass oil. Uniformly mixing the components of the composite binder according to the proportion, and uniformly mixing the components and the waste mixture in a mixer for 5 min; and pressing the uniformly mixed materials into pellets under the pressure of 10 MPa. The pellets obtained by pressing were dried and then subjected to various strength tests. The results are as follows: the falling strength is 91.6 percent, the compressive strength is 15.0MPa, and the drum strength is 90.5 percent after heating at 700 ℃. The pellet can be used in the processes of molten steel refining, industrial silicon refining, industrial ferrosilicon and silicomanganese production.
Example 5:
selecting waste steel slag as a raw material. The high-purity composite binder consists of corn starch, sodium lignosulphonate, silica sol and biomass oil, and the dosage of the high-purity composite binder is calculated by the total mass percentage of the steel slag: 18.5% of corn starch, 2.5% of sodium lignosulfonate, 3.5% of silica sol and 1% of biomass oil. Uniformly mixing the components of the composite binder according to the proportion, and uniformly mixing the components and the waste mixture in a mixer for 10 min; and pressing the uniformly mixed materials into pellets under the pressure of 20 MPa. The pellets obtained by pressing were dried and then subjected to various strength tests. The results are as follows: the falling strength is 90.7 percent, the compressive strength is 12.3MPa, and the drum strength is 88.1 percent after heating at 700 ℃. The pellet can be used in the processes of molten steel refining, industrial silicon refining, and industrial ferrosilicon and silicomanganese production.
Example 6:
selecting waste coke slag as a raw material. The high-purity composite binder consists of sweet potato starch, potassium lignosulfonate, lignin, silica sol and biomass oil, and the dosage of the high-purity composite binder is calculated by the total mass percentage of coke residues: 4.5% of sweet potato starch, 2% of sodium lignosulphonate, 1% of lignin, 1.5% of silica sol and 11% of biomass oil. Uniformly mixing the components of the composite binder according to the proportion, and uniformly mixing the components and the waste mixture in a mixer for 5 min; and pressing the uniformly mixed materials into pellets under the pressure of 10 MPa. The pellets obtained by pressing were dried and then subjected to various strength tests. The results are as follows: the falling strength is 90.7 percent, the compressive strength is 15.9MPa, and the drum strength is 95.0 percent after heating at 1100 ℃. The pellet can be used in industrial silicon production, industrial ferrosilicon and silicomanganese production processes.
Example 7:
the waste micro silicon powder, scrap iron and coke slag are selected as raw materials. The high-purity composite binder consists of corn starch, lignin, silica sol and biomass oil, and the dosage of the high-purity composite binder is calculated by the total mass percentage of micro silicon powder, scrap iron and coke slag: 10% of corn starch, 5% of lignin, 0.5% of silica sol and 1% of biomass oil. Uniformly mixing the components of the composite binder according to the proportion, and uniformly mixing the components and the waste mixture in a mixer for 8 min; and pressing the uniformly mixed materials into pellets under the pressure of 25 MPa. The pellets obtained by pressing were dried and then subjected to various strength tests. The results are as follows: the falling strength is 94.2 percent, the compressive strength is 28.3MPa, and the drum strength is 95.0 percent after heating at 1100 ℃. The pellet can be used in the processes of molten steel refining, industrial silicon production, industrial silicon refining, and industrial ferrosilicon and silicomanganese production.
Example 8:
waste steel slag, dedusting ash and scrap iron are selected as raw materials. The high-purity composite binder consists of wheat flour, lignin, silica sol and biomass oil, and the dosage of the high-purity composite binder is calculated by the total mass percentage of steel slag, dedusting ash and scrap iron: 8.5% of wheat flour, 7% of lignin, 5.5% of silica sol and 3% of biomass oil. Uniformly mixing the components of the composite binder according to the proportion, and uniformly mixing the components with the waste mixture in a mixer for 12 min; and pressing the uniformly mixed materials into pellets under the pressure of 25 MPa. The pellets obtained by pressing were dried and then subjected to various strength tests. The results were as follows: the falling strength is 90.7 percent, the compressive strength is 12.3MPa, and the drum strength is 90.5 percent after heating at 1100 ℃. The pellet can be used in the processes of molten steel refining, industrial silicon production, industrial silicon refining, and industrial ferrosilicon and silicomanganese production.
Claims (9)
1. The high-purity composite binder for the metallurgical pellets is characterized by comprising the following components in percentage by mass of the total mass of pellet raw materials: 0.1-25% of starch, 0.1-25% of lignin, 0.1-25% of silica sol and 0.1-30% of biomass oil.
2. The high purity composite binder for metallurgical pellets of claim 1, wherein: the component starch is corn starch, or potato starch, or sweet potato starch, or tapioca, or mung bean starch, or wheat flour, or a mixture of one or more of the above starches.
3. The high purity composite binder for metallurgical pellets of claim 1, wherein: the component lignin is sodium lignosulphonate, or calcium lignosulphonate, or potassium lignosulphonate, or one or more than two of the lignin.
4. The high purity composite binder for metallurgical pellets of claim 1, wherein: the component of the silica sol is colloidal aqueous solution of silicon dioxide ultrafine particles, namely SiO2The content is 10-60% by mass.
5. The high purity composite binder for metallurgical pellets of claim 1, wherein: the component biomass oil is obtained by thermal decomposition of various forest trees, crop straws and processing residues of agricultural and forestry products, and is a mixture consisting of various degradation products of cellulose, hemicellulose and lignin, namely macromolecular organic matters and water.
6. The high purity composite binder for metallurgical pellets of claim 1, wherein: the falling strength of the metallurgical pellets prepared by the binder is more than or equal to 86 percent.
7. The high purity composite binder for metallurgical pellets of claim 1, wherein: the compressive strength of the metallurgical pellets prepared by using the binder is more than or equal to 10 MPa.
8. The high purity composite binder for metallurgical pellets according to claim 1, wherein: the drum strength of the metallurgical pellets prepared by the binder is greater than or equal to 85 percent after heating.
9. The method for using the high-purity composite binder for the metallurgical pellets as claimed in claim 1, which comprises the following steps:
uniformly mixing the components of the composite binder according to the proportion;
step (2) uniformly mixing the composite binder obtained in the step (1) with a pellet raw material, and adding a proper amount of water when needed;
step (3) performing pressure forming on the mixture obtained in the step (2), and drying to obtain a metallurgical pellet;
the particle size of the pellet raw material particles in the step (2) is less than or equal to 7 mm;
the process of uniformly mixing the composite binder and the pellet raw materials in the step (2) is executed by various mixing machines or various manual mixing processes;
the pellet pressure forming process in the step (3) can be executed by various ball pressing machines or various simple manual ball pressing devices.
Priority Applications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117758044A (en) * | 2023-12-25 | 2024-03-26 | 北京辰兴环宇高新技术发展有限公司 | Adhesive for high-temperature-resistant cold bonded pellets, cold bonded pellets and preparation method of cold bonded pellets |
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| CN117758044A (en) * | 2023-12-25 | 2024-03-26 | 北京辰兴环宇高新技术发展有限公司 | Adhesive for high-temperature-resistant cold bonded pellets, cold bonded pellets and preparation method of cold bonded pellets |
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| CN114737055B (en) | 2024-03-29 |
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