CN113801991B - Method for improving quality of sinter - Google Patents
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- CN113801991B CN113801991B CN202010550656.6A CN202010550656A CN113801991B CN 113801991 B CN113801991 B CN 113801991B CN 202010550656 A CN202010550656 A CN 202010550656A CN 113801991 B CN113801991 B CN 113801991B
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- 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
- C22B1/16—Sintering; Agglomerating
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- 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
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Abstract
The invention discloses a method for improving quality of sinter, which mainly solves the technical problem of poor quality of sinter produced by the prior art. The technical scheme is as follows: a method of improving the quality of sinter comprising the steps of: 1) Preparing a mixture in the middle of a sinter bed; 2) Preparing a material layer mixture on the sinter layer; 3) Distributing materials, namely uniformly distributing limonite lump ores at the bottom of a sintering trolley, wherein the grain diameter of the limonite lump ores is 8-20 mm, and the thickness of a limonite lump ore material layer is 25-35 mm; secondly, distributing a mixture in the middle of a sinter bed on the surface of a limonite block ore bed, wherein the thickness of the mixture in the middle of the sinter bed is 70-85% of the total height of the sintering trolley; then laying the mixture on the upper part of the sinter bed on the surface of the mixture in the middle of the sinter bed; 4) And (4) air draft sintering, wherein the sintering material is ignited and air draft sintered to produce sintering ore. The sintered ore metallurgy produced by the method has excellent performance and low cost.
Description
Technical Field
The invention relates to a method for producing sintered ore, in particular to a method for improving the quality of the sintered ore, and specifically relates to a method for improving the quality of the sintered ore by reasonably distributing the heat of a sinter bed, belonging to the technical field of production of sintered ore of iron-making raw materials.
Background
The iron-containing raw material and the coke powder fuel are uniformly mixed in the sintering process, and the mixed material is distributed on a sintering trolley for sintering through a distributor. For the sintering fuel, the fuel with thicker particles is easily distributed at the bottom of the material layer due to segregation, so that the heat at the bottom of the sintering material layer is excessive, and the heat at the upper part of the material layer is insufficient. The difference of the heat demand of the upper and lower material layers and the uneven distribution of the fuel finally lead to the deterioration of the sintering yield and the barrate strength index.
Because of the uneven distribution of fuel caused by segregation, coarse fuel particles tend to be easily distributed at the bottom of the material layer, so that the upper material layer has less fuel. At the same time, the lower material layer has the function of heat storage, and the required heat is relatively less than that of the upper material layer. Due to the phenomenon, the quality indexes of finished product rate, strength and the like are low due to the fact that sintering time of materials on a material layer is too fast and heat is little; the lower material has the heat storage function and the fuel segregation function, so that the heat is excessive, the sintered ore is over-melted, and the reduction performance of the sintered ore is influenced.
How to balance the heat is the key point for solving the problems.
Aiming at improving the fuel balance arrangement of a sinter bed, a great deal of research work is done by sintering workers for the purpose of achieving some effects, but the effective balance arrangement of the fuel of the sinter bed and the improvement of the quality of upper and lower materials of sinter are difficult.
Chinese patent application publication No. CN102445078a discloses a uniform burn-through control system and method for a sintering machine, which comprises a sintering production database server, a display unit and a communication network, and is characterized by comprising a sintering production data acquisition unit and a sintering production data processing unit. The invention collects and records sintering production process data through a sintering data collection unit; and then the sintering data processing unit calculates the position of the burn-through point of each area according to the matrix temperature of the air box, calculates the thickness of each area of the material layer, and transmits the thickness set value of each area of the material layer to a sintering PLC control system through the data transmission unit, thereby solving the problem of uniformity of the burn-through end point in the width direction of the sintering machine. The invention mainly solves the problem of uniformity of the sintering machine width direction burn-through terminal.
The Chinese patent application with the application publication number of CN106546591A discloses a method for detecting the uniformity of a sinter, which gradually calculates the uniformity quantification of the sinter by drawing a mineral distribution map in the sinter, accurately quantifies the uniformity index of the sinter by using the uniformity of the sinter, can visually indicate the uniformity of the sinter, and belongs to the field of computer detection.
Disclosure of Invention
The invention aims to provide a method for improving the quality of sinter, which mainly solves the technical problem of poor quality of the sinter produced by the prior art.
The technical scheme of the invention is that the method for improving the quality of the sinter comprises the following steps:
1) Preparing a mixture in the middle of a sinter bed, and calculating the ore blending mass proportion of hematite rich ore powder, sinter return ores, a flux and solid fuels according to the technical quality indexes of the sinter, wherein the sinter ore blending raw materials comprise the following components in percentage by mass: 65-78% of hematite rich ore powder, 5-10% of sintered return ores, 10-12% of flux and 4-5% of solid fuel, wherein the sum of the mass percentages of the components is 100%; uniformly mixing the hematite rich ore powder, the sintering return ores, the flux and the solid fuel by using a primary mixer, adding water in the uniformly mixing process, and uniformly mixing for 5-8 min to prepare a primary mixture, wherein the mass percentage of the water in the primary mixture is 6.8-7.0%; conveying the primary mixture to a mixing granulator for granulation to obtain a mixture in the middle of a sinter bed;
2) Preparing a mixture of an upper material layer of a sinter bed, and calculating the ore blending mass proportion of magnetite fine iron powder, hematite rich mineral powder, sinter return ores, a flux and solid fuel according to the technical quality index of the sinter, wherein the sintering ore blending raw material comprises the following components in percentage by mass: 30-40% of magnetite iron fine powder, 30-45% of hematite rich mineral powder, 5-10% of sintered return ore, 10-12% of flux and 4-5% of solid fuel, wherein the sum of the mass percentages of the components is 100%; uniformly mixing magnetite iron fine powder, hematite rich mineral powder, sintering return ores, a flux and solid fuel by using a primary mixer, adding water in the uniformly mixing process, uniformly mixing for 5-8 min to prepare a primary mixture, wherein the mass percentage of the water in the primary mixture is 6.8-7.0%; conveying the primary mixture to a mixing granulator for granulation to obtain a mixture of a material layer on the upper part of a sinter layer;
3) Distributing materials, namely uniformly distributing limonite lump ores at the bottom of a sintering trolley, wherein the grain diameter of the limonite lump ores is 8-20 mm, and the thickness of a limonite lump ore material layer is 25-35 mm; secondly, distributing a mixture in the middle of a sinter bed on the surface of a limonite block ore bed, wherein the thickness of the mixture in the middle of the sinter bed is 70-85% of the total height of the sintering trolley; then laying the mixture on the upper part of the sinter bed on the surface of the mixture in the middle of the sinter bed, wherein the sum of the thickness of the limonite lump ore bed, the thickness of the mixture in the middle of the sinter bed and the thickness of the mixture on the upper part of the sinter bed is 100 percent of the total height of the sintering trolley;
4) And (3) performing air draft sintering, igniting the sintering material, performing air draft sintering to produce a sintering ore, controlling the negative pressure of air draft in the sintering process to be 12-16 kPa, the ignition temperature to be 1100-1250 ℃, controlling the mass percent of MgO in the sintering ore to be 0.8-1.6%, the mass percent of FeO in the sintering ore to be 7.5-8.5%, and controlling the alkalinity of the sintering ore to be 1.7-2.1.
Further, in the step 3), the grain size of the limonite lump ore is 8-20 mm, and the effect is good.
Furthermore, the grain diameter of the mixture of the upper material layer of the sinter bed is 2.0-4.0 mm, and the grain diameter of the mixture of the middle material layer of the sinter bed is 2.0-5.0 mm.
The grain size of the sintered return ores is less than or equal to 5.0mm.
The solid fuel is any one of coke powder, anthracite powder or a mixture of the coke powder and the anthracite powder; the mass percentage of carbon in the solid fuel is 77-85%; the solid fuel with the grain diameter less than or equal to 3.0mm accounts for more than or equal to 90 percent of the total mass of the solid fuel.
The basicity of the sinter is = the mass content of CaO in the sinter/SiO in the sinter 2 Mass content of (a).
The method of the invention is based on the following research findings of the applicant:
because of the segregation effect, coarse fuel particles tend to be distributed easily at the bottom of the bed, resulting in a lower fuel content in the upper bed. At the same time, the lower material layer has the function of heat storage, and the required heat is relatively less than that of the upper material layer. Due to the phenomenon, the quality indexes of finished product rate, strength and the like are low due to the fact that sintering time of materials on a material layer is too fast and heat is less; the lower material has the heat storage function and the fuel segregation function, so that the heat is excessive, the sintered ore is over-melted, and the reduction performance of the sintered ore is influenced.
How to evenly distribute heat is the key to solve the above problems, and is also one of the technical problems of the sintering process which is difficult to solve at present.
Limonite is hematite containing crystal water, and the crystal water is evaporated and removed in the sintering process, so that certain energy is consumed, and the required heat is large. The limonite lump ore is used as a bedding material, a certain amount of heat can be consumed in the sintering process, the problem of excessive bottom heat can be solved exactly, and the heat balance effect is achieved.
Meanwhile, the limonite lump ore is processed by screening, and the lump ore with the size of 8-20 mm is transported to be sintered to be used as a bedding material, so that on one hand, the charging granularity of the blast furnace lump ore can be improved; on the other hand, the sintering yield can be increased, and the clinker rate of the blast furnace is increased; finally, the reduction performance of the lower material sinter can be greatly improved.
The upper part of the sinter bed has poor heat storage effect due to fast sintering time and high-temperature retention time period, and the quality of the sinter is poor, so the drum strength and the yield of the sinter are affected.
The conventional concentrate powder is generally magnetite concentrate powder and contains a relatively high content of FeO. FeO undergoes an oxidation reaction during sintering to generate heat, and the reaction formula is as follows:
Fe 3 O 4 +O 2 ≈Fe 2 O 3 +Q。
15-40% of the magnet concentrate powder is proportioned and uniformly distributed on the upper portion of the material layer, so that the effect of supplementing upper portion heat can be effectively achieved. On one hand, the magnet concentrate powder after granulation and pelletizing does not influence sintering air permeability, can supplement upper heat, and improves the sinter quality of upper materials; on the other hand, the price of the magnet concentrate powder is relatively low, and the common iron and steel plants have the magnet concentrate powder produced by themselves, so that the cost of the sintered ore can be reduced.
The two points skillfully utilize the chemical characteristics of the limonite lump ore and the magnet concentrate powder, play an effective heat balancing role, improve the quality of the sinter as a whole and reduce the cost of the sinter. Meanwhile, the technology has positive significance for improving the use value of the domestic magnet fine powder.
Compared with the prior art, the invention has the following positive effects: 1. the reduction performance of the sinter below the material layer is improved. The use of limonite lump ore consumes the heat of the lower material layer, and avoids the generation of an over-melting phenomenon. The sintered ore is over-melted, the reducing atmosphere is enhanced, and the FeO content is increased, so that the reducing performance is poor. The invention effectively solves the problems and improves the reduction performance of the sinter below the material layer. 2. The use proportion of the magnet concentrate powder is improved, and the ore cost of the sinter is reduced. The magnet concentrate powder has a problem of poor air permeability due to excessive use, and the sintering yield is easily affected, so the price is relatively low. According to the invention, through pelletizing and granulating, and the use of the magnet concentrate powder in a high proportion on the upper material does not cause adverse effect on the sintering yield, so that the use proportion of the magnet concentrate powder is improved, and the ore cost of the sinter is reduced. 3. Effectively improves the quality of the upper sintering ore of the sintering ore. After the magnet concentrate powder is used, the heat of the upper-layer sintering material is effectively compensated, and the yield of the sintering ore and the drum strength are improved. 4. The furnace entering granularity of the blast furnace lump ore is improved. After sieving processing, small-particle lump ore with the particle size of 8-20 mm is transported to be sintered to be used as a bedding material, and the rest large particles are directly fed into the furnace, so that the feeding granularity of the lump ore can be effectively improved, and the air permeability of the blast furnace is improved. 5. The clinker rate of the blast furnace is improved. The traditional sintering process takes finished sintered ore as a bedding material, and wastes sintering capacity to a certain extent. The invention changes a part of small-particle lump ore into sintering clinker after the small-particle lump ore participates in sintering production and then sends the sintering clinker to the blast furnace, thereby effectively improving the clinker rate of the blast furnace and improving the furnace condition of the blast furnace. 6. The invention has the advantages of easy implementation, obvious effect and low implementation cost.
Detailed Description
The invention will now be further elucidated with reference to specific examples, as shown in tables 1-3.
A method of improving the quality of sinter comprising the steps of:
1) Preparing a mixture in the middle of a sinter bed, and calculating the ore blending mass proportion of hematite rich ore powder, sinter return ores, a flux and solid fuels according to the technical quality indexes of the sinter, wherein the sinter ore blending raw materials comprise the following components in percentage by mass: 65-78% of hematite rich ore powder, 5-10% of sintered return ores, 10-12% of flux and 4-5% of solid fuel, wherein the sum of the mass percentages of the components is 100%; uniformly mixing the hematite rich mineral powder, the sintered return ores, the flux and the solid fuel by using a primary mixer, adding water in the uniform mixing process, and uniformly mixing for 7min to prepare a primary mixture, wherein the mass percentage of the water in the primary mixture is 6.8%; conveying the primary mixture to a mixing granulator for granulation to obtain a mixture in the middle of a sinter bed;
2) Preparing a mixture of an upper material layer of a sinter bed, and calculating the ore blending mass proportion of magnetite fine iron powder, hematite rich mineral powder, sinter return ores, a flux and solid fuel according to the technical quality index of the sinter, wherein the sintering ore blending raw material comprises the following components in percentage by mass: 30-40% of magnetite iron fine powder, 30-45% of hematite rich mineral powder, 5-10% of sintered return ore, 10-12% of flux and 4-5% of solid fuel, wherein the sum of the mass percentages of the components is 100%; uniformly mixing magnetite iron fine powder, hematite rich mineral powder, sintering return ores, a flux and solid fuel by using a primary mixer, adding water in the uniformly mixing process, and preparing a primary mixture after uniformly mixing for 7min, wherein the mass percentage of the water in the primary mixture is 6.8%; conveying the primary mixture to a mixing granulator for granulation to obtain a mixture of a material layer on the upper part of a sinter layer;
3) Distributing, namely uniformly distributing limonite lump ores at the bottom of the sintering trolley, wherein the grain diameter of the limonite lump ores is 8-20 mm, and the thickness of a limonite lump ore material layer is 30mm; then laying a mixture in the middle of the sinter bed on the surface of the limonite lump ore bed, wherein the thickness of the mixture in the middle of the sinter bed is 80% of the total height of the sintering trolley; then laying the mixture on the upper part of the sinter bed on the surface of the mixture in the middle of the sinter bed, wherein the sum of the thickness of the limonite lump ore bed, the thickness of the mixture in the middle of the sinter bed and the thickness of the mixture on the upper part of the sinter bed is 100 percent of the total height of the sintering trolley;
4) And (3) performing air draft sintering, igniting the sintering material, performing air draft sintering to produce a sintering ore, controlling the air draft negative pressure to be 16kPa during the sintering process, controlling the ignition temperature to be 1150 ℃, controlling the mass percent of MgO in the sintering ore to be 0.8-1.6%, controlling the mass percent of FeO in the sintering ore to be 7.5-8.5%, and controlling the alkalinity of the sintering ore to be 1.7-2.1.
In example 1, the blending mass ratio of the ultra-fine iron ore concentrate powder, the hematite rich ore powder, the sintering return fines, the flux and the solid fuel is calculated according to the technical mass indexes of the sintered ore, and the mass percentage content of MgO in the sintered ore is controlled to be 1.4%, the mass percentage content of FeO is controlled to be 8.5%, and the alkalinity (CaO/SiO 2) of the sintered ore is controlled to be 1.95.
In example 2, the blending mass ratio of the ultra-fine iron ore concentrate powder, the hematite rich ore powder, the sintering return fines, the flux and the solid fuel is calculated according to the technical mass indexes of the sintered ore, and the mass percentage content of MgO in the sintered ore is controlled to be 1.5%, the mass percentage content of FeO is controlled to be 8.0%, and the alkalinity (CaO/SiO 2) of the sintered ore is controlled to be 1.88.
In example 3, the blending mass ratio of the ultra-fine iron ore concentrate powder, the hematite rich ore powder, the sintering return fines, the flux and the solid fuel is calculated according to the technical mass indexes of the sintered ore, and the mass percentage content of MgO in the sintered ore is controlled to be 1.35%, the mass percentage content of FeO is controlled to be 8.5%, and the basicity (CaO/SiO 2) of the sintered ore is controlled to be 1.85.
Table 1 the mixture proportioning ratio of the middle part of the sinter bed in the embodiment of the present invention, unit: and (4) percent by mass.
| Categories | Hematite rich ore powder | Sintered return ores | Dolomite | Quick lime | Apatite | Solid fuel |
| Example 1 | 72.9 | 9.5 | 2.3 | 7.3 | 3.4 | 4.6 |
| Example 2 | 74.6 | 8.5 | 2.3 | 6.9 | 3.2 | 4.5 |
| Example 3 | 74.3 | 8.7 | 2.3 | 7 | 3.3 | 4.4 |
Table 2 ratio of the mixture at the upper part of the sinter bed in the example of the present invention, unit: and (4) percent by mass.
| Categories | Magnetite iron concentrate | Hematite rich ore powder | Sintered return ores | Dolomite | Quick lime | Apatite | Solid fuel |
| Example 1 | 40.0 | 33.0 | 9.5 | 2.3 | 7.3 | 3.4 | 4.5 |
| Example 2 | 30.0 | 44.6 | 8.5 | 2.3 | 6.9 | 3.2 | 4.5 |
| Example 3 | 35.0 | 40.0 | 8.0 | 2.2 | 7.1 | 3.3 | 4.4 |
TABLE 3 indexes of sintering production of examples of the present invention
As shown in Table 3, in example 1, the iron grade of the sintered ore is slightly reduced from 58.22% to 58.15%, the drum strength is improved from 82.12% to 83.81%, the yield is improved from 68.72% to 69.88%, and the ore blending cost of the sintered ore is reduced by 2.6 yuan/t by using the magnet concentrate powder with slightly lower grade instead of the rich ore powder. Meanwhile, the metallurgical performance of the sinter is improved, and the reduction rate RI of the sinter is improved from 78.56% to 81.23%.
In example 2, the iron grade of the sintered ore is slightly reduced to 58.19 percent from 58.22 percent, the drum strength is improved to 83.96 percent from 82.12 percent, the yield is improved to 69.98 percent from 68.72 percent, and the ore blending cost of the sintered ore is reduced by 2.9 yuan/t. Meanwhile, the metallurgical performance of the sinter is improved, and the reduction rate RI of the sinter is improved to 79.98 percent from 78.56 percent.
In example 3, the iron grade of the sintered ore is slightly reduced to 58.18 percent from 58.22 percent, the drum strength is improved to 84.12 percent from 82.12 percent, the yield is improved to 70.25 percent from 68.72 percent, and the ore blending cost of the sintered ore is reduced by 3.4 yuan/t. Meanwhile, the metallurgical performance of the sinter is improved, and the reduction rate RI of the sinter is improved to 80.95 percent from 78.56 percent.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (4)
1. A method for improving the quality of sinter, comprising the steps of:
1) Preparing a mixture in the middle of a sinter bed, and calculating the ore blending mass proportion of hematite rich ore powder, sinter return ores, a flux and solid fuels according to the technical quality indexes of the sinter, wherein the sinter ore blending raw materials comprise the following components in percentage by mass: 65-78% of hematite rich mineral powder, 5-10% of sintered return ores, 10-12% of flux and 4-5% of solid fuel, wherein the sum of the mass percentages of the components is 100%; uniformly mixing the hematite rich mineral powder, the sintered return ores, the flux and the solid fuel by using a primary mixer, adding water in the uniformly mixing process, uniformly mixing for 5-8 min to prepare a primary mixture, wherein the mass percentage of the water in the primary mixture is 6.8-7.0%; conveying the primary mixture to a mixing granulator for granulation to obtain a mixture in the middle of a sinter bed;
2) Preparing a mixture of an upper material layer of a sinter bed, and calculating the ore blending mass proportion of magnetite fine iron powder, hematite rich mineral powder, sinter return ores, a flux and solid fuel according to the technical quality index of the sinter, wherein the sintering ore blending raw material comprises the following components in percentage by mass: 30-40% of magnetite iron fine powder, 30-45% of hematite rich mineral powder, 5-10% of sintered return ore, 10-12% of flux and 4-5% of solid fuel, wherein the sum of the mass percentages of the components is 100%; uniformly mixing magnetite iron fine powder, hematite rich mineral powder, sintering return ores, a flux and solid fuel by using a primary mixer, adding water in the uniformly mixing process, uniformly mixing for 5-8 min to prepare a primary mixture, wherein the mass percentage of the water in the primary mixture is 6.8-7.0%; conveying the primary mixture to a mixing granulator for granulation to obtain a mixture of the upper material layer of the sinter layer;
3) Distributing materials, namely uniformly distributing limonite lump ores at the bottom of the sintering trolley, wherein the thickness of a limonite lump ore material layer is 25-35 mm; secondly, distributing a mixture in the middle of a sinter bed on the surface of a limonite block ore bed, wherein the thickness of the mixture in the middle of the sinter bed is 70-85% of the total height of the sintering trolley; then, distributing the mixture on the upper part of the sinter bed on the surface of the mixture in the middle of the sinter bed, wherein the sum of the thickness of the limonite lump ore bed, the thickness of the mixture in the middle of the sinter bed and the thickness of the mixture on the upper part of the sinter bed is 100 percent of the total height of the sintering trolley; the grain size of the limonite lump ore is 8.0-20.0 mm;
4) And (3) performing air draft sintering, wherein the sintered material is ignited and sintered to produce sintered ore, the negative pressure of air draft in the sintering process is controlled to be 12-16 kPa, the ignition temperature is 1100-1250 ℃, the mass percentage content of MgO in the sintered ore is 0.8-1.6%, the mass percentage content of FeO is 7.5-8.5%, and the alkalinity of the sintered ore is 1.7-2.1.
2. The method according to claim 1, wherein the grain size of the mixture of the upper layer of the sinter bed is 2.0-4.0 mm, and the grain size of the mixture of the middle layer of the sinter bed is 2.0-5.0 mm.
3. The method of claim 1, wherein the sintered return ores have a grain size of 5.0mm or less.
4. The method for improving the quality of the sintered ore according to claim 1, wherein the solid fuel is any one of coke powder, anthracite powder or a mixture of the coke powder and the anthracite powder; the mass percentage of carbon in the solid fuel is 77-85%; the solid fuel with the grain diameter less than or equal to 3.0mm accounts for more than or equal to 90 percent of the total mass of the solid fuel.
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| CN116144921B (en) * | 2022-12-07 | 2024-07-02 | 中冶长天国际工程有限责任公司 | Material distribution method for composite agglomeration of sintering machine and composite agglomerate ore |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1429920A (en) * | 2001-12-31 | 2003-07-16 | 新疆钢铁研究所 | Application of limonite as bedding material in method for producing pellet agglomerate |
| WO2010072999A2 (en) * | 2008-12-23 | 2010-07-01 | Oxonica Materials Limited | Sinter process |
| CN103215443B (en) * | 2013-05-21 | 2014-04-23 | 唐山瑞丰钢铁（集团）有限公司 | High-ore-matching-ratio brown iron ore sintering technology |
| CN103334004B (en) * | 2013-06-30 | 2015-05-20 | 山西太钢不锈钢股份有限公司 | Method for producing sinter from Yuanjia village concentrate powder by using large sintering machine |
| CN103409616B (en) * | 2013-09-05 | 2015-03-11 | 中南大学 | Method for inhibiting low-temperature reduction degradation of sintering ore of iron ore |
| JP2016130341A (en) * | 2015-01-14 | 2016-07-21 | 株式会社神戸製鋼所 | Method of producing sintered ore raw material using magnetite ore |
| CN106480307B (en) * | 2015-08-31 | 2018-08-03 | 鞍钢股份有限公司 | Method for improving homogeneity of sinter |
| CN108642272A (en) * | 2018-06-04 | 2018-10-12 | 山西建龙实业有限公司 | A kind of brown ocher high mixture ratio sintering method |
| CN108754131B (en) * | 2018-06-14 | 2020-02-18 | 鞍钢股份有限公司 | Sintering production method for optimizing fuel matching |
| CN109628733B (en) * | 2019-01-15 | 2020-02-04 | 中南大学 | Low-carbon low-NOx sintering method based on reasonable fuel distribution |
| CN110819792A (en) * | 2019-10-28 | 2020-02-21 | 鞍钢股份有限公司 | Method for producing pre-reduced sinter |
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