A low-cost sintered ore

Abstract

The invention relates to the technical field of ore blending, and in particular to a low-cost sintered ore. The present invention improves the calcium ferrite generation capacity while ensuring a low assimilation temperature through reasonable compounding of components such as vanadium-titanium powder, coarse powder, rich ore powder, waste metal material and MgO, thereby effectively making up for the insufficient performance when a single component is used and improving the strength of the sintered ore. Meanwhile, by adding reasonable MgO, appropriate basicity control can be achieved, which can effectively promote the generation of calcium ferrite and further ensure the sintering quality. The rich ore powder is a mixture, which is used in combination with BRBF Brazilian powder and Australian powder Pb to make up for the insufficient performance of the two and improve the sintering strength. The reasonable compounding of high-silicon Brazilian coarse powder, FMG powder and Roy Mountain powder can effectively ensure the bonding phase strength and continuous crystal strength. In addition, the high-silicon Brazilian coarse powder, Roy Mountain powder and FMG powder added in the present invention are all non-mainstream ores, which effectively reduce the cost while ensuring the quality.

Description

Technical Field

[0001] The invention relates to the technical field of sintering and ore blending, in particular to a low-cost sintered ore. Background Art

[0002] At present, the domestic steel market is increasingly competitive, iron ore resources are in short supply, and iron ore prices have soared and remained high, causing a sharp increase in the production costs of steel companies. The pre-iron (ironmaking) cost accounts for 70% of the total steel cost, so reducing the pre-iron cost is the basis for reducing the overall steel cost. Sintered ore is the main raw material for blast furnace ironmaking in my country, accounting for about 70% of the blast furnace charge. The quality and cost of sintered ore play a decisive role in the economic and technical indicators of the blast furnace. All large domestic steel companies have carried out research on sintering ore matching technology and formed a series of theoretical systems.

[0003] The present application aims to propose a low-cost sintered ore, which reduces the cost while ensuring the quality of the sintered ore. Summary of the invention

[0004] To solve the above problems, the present invention provides a low-cost sintered ore, which, through reasonable compounding, has suitable assimilation temperature, fluidity and calcium ferrite generation capacity, effectively improves the strength of the sintered ore, and reduces the cost of the sintered ore.

[0005] The technical solution adopted by the present invention is:

[0006] A low-cost sintered ore comprising the following components in mass percentage:

[0007] Vanadium titanium powder 20-30%;

[0008] Coarse powder 0-5%;

[0009] Rich ore powder 55-75%;

[0010] Scrap metal 10-15%;

[0011] MgO 1.9-2.3%.

[0012] A further improvement to the above technical solution is that the vanadium-titanium powder is a mixed vanadium-titanium powder composed of at least two of Chengde vanadium-titanium powder, Longmang vanadium-titanium powder, Taihe vanadium-titanium powder and Anning vanadium-titanium powder.

[0013] A further improvement to the above technical solution is that the addition ratio of Chengde vanadium titanium powder, Longmang vanadium titanium powder, Taihe vanadium titanium powder and Anning vanadium titanium powder in the mixed vanadium titanium powder is 0-1:3-4:1-2:0-0.6.

[0014] A further improvement to the above technical solution is that the coarse powder is Chilean coarse powder.

[0015] A further improvement to the above technical solution is that the rich ore powder is a mixed rich ore powder composed of at least four of FMG mixed powder, BRBF Brazilian powder, Australian powder Pb, super special powder, high silicon Brazilian powder and Roy Mountain.

[0016] A further improvement to the above technical solution is that the addition ratio of FMG mixed powder, BRBF Brazilian powder, Australian powder Pb, super special powder, high silicon Brazilian powder and Royshan in the mixed rich ore powder is 0-1:5-6:4-5:0-2:0.5-1.5:0.2-0.6:2-2.5.

[0017] A further improvement to the above technical solution is that the basicity of the sintered ore is 2.15-2.25.

[0018] A further improvement to the above technical solution is that the average particle size of the mixed vanadium-titanium powder is less than 20.0 mm.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention improves the calcium ferrite generation capacity while ensuring a low assimilation temperature through the reasonable compounding of the components of vanadium titanium powder, coarse powder, rich ore powder, waste metal material and MgO, thereby effectively making up for the performance deficiency when a single component is used and improving the strength of the sintered ore. At the same time, by reasonably adding MgO, appropriate basicity control is achieved, which can effectively promote the generation of calcium ferrite and further ensure the sintering quality. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively by way of examples, and preferred embodiments of the present invention are given below. However, the present invention can be implemented in a variety of different forms and is not limited to the embodiments described herein. Any other implementation schemes obtained by modifying or equivalently replacing the technical scheme of the present invention without creative results are within the protection scope of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for describing specific embodiments and are not intended to limit the present invention.

[0023] The numerical values ​​disclosed in the embodiments of the present invention are approximate values, not definite values. When the error or experimental conditions permit, all values ​​within the error range may be included without being limited to the specific numerical values ​​disclosed in the embodiments of the present invention.

[0024] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0025] The low-cost sintered ore provided in this application comprises the following components in percentage by mass:

[0026] Vanadium titanium powder 20-30%;

[0027] Coarse powder 0-5%;

[0028] Rich ore powder 55-75%;

[0029] Scrap metal 10-15%;

[0030] MgO 1.9-2.3%.

[0031] Specifically, the basicity of the sintered ore is 2.15-2.25.

[0032] The present application improves the calcium ferrite generation capacity while ensuring a low assimilation temperature through the reasonable compounding of the components of vanadium titanium powder, coarse powder, rich ore powder, waste metal material and MgO, thereby effectively compensating for the insufficient performance when a single component is used and improving the strength of the sintered ore. At the same time, through the reasonable addition of MgO, the appropriate basicity control is achieved, which can effectively promote the generation of calcium ferrite and further ensure the sintering quality.

[0033] Specifically, the vanadium-titanium powder is a mixed vanadium-titanium powder composed of at least two of Chengde vanadium-titanium powder, Longmang vanadium-titanium powder, Taihe vanadium-titanium powder and Anning vanadium-titanium powder.

[0034] More specifically, the addition ratio of Chengde vanadium titanium powder, Longmang vanadium titanium powder, Taihe vanadium titanium powder and Anning vanadium titanium powder in the mixed vanadium titanium powder is 0-1:3-4:1-2:0-0.6.

[0035] In the present application, the mixed vanadium titanium powder is formed by the reasonable compounding of the components Chengde vanadium titanium powder, Longmang vanadium titanium powder, Taihe vanadium titanium powder and Anning vanadium titanium powder, which can reduce the amount of liquid phase generated by perovskite and increase the amount of liquid phase generated by calcium ferrite, and at the same time make the SiO2 content in the sintered ore reasonable, so as to further increase the amount of liquid phase generated by the sintered ore and improve the quality of the sintered ore.

[0036] Wherein, the coarse powder is Chilean coarse powder.

[0037] The rich ore powder is a mixed rich ore powder composed of at least four of FMG mixed powder, BRBF Brazilian powder, Australian powder Pb, super special powder, high silicon Brazilian powder and Roy Mountain.

[0038] Among them, the addition ratio of FMG mixed powder, BRBF Brazilian powder, Australian powder Pb, super special powder, high silicon Brazilian powder and Royshan in the mixed rich ore powder is 0-1: 5-6: 4-5: 0-2: 0.5-1.5: 0.2-0.6: 2-2.5.

[0039] In the present application, the mixed rich ore powder composed of FMG mixed powder, BRBF Brazilian powder, Australian powder Pb, super special powder, high silicon BRBF and Roy Mountain can effectively overcome the problem of low bonding strength through compound synergistic effect, and effectively improve the continuous crystal strength and the amount of calcium ferrite generated, thereby ensuring the sintering quality of the sintered ore, especially the BRBF Brazilian powder and Australian powder Pb, which need to be used in combination to make up for the performance deficiencies of the two and improve the sintering strength. The reasonable compounding of high silicon BRBF, FMG powder and Roy Mountain powder can effectively ensure the bonding phase strength and continuous crystal strength. In addition, the high silicon BRBF, Roy Mountain powder and FMG powder added in the present application are all non-mainstream ores, which effectively reduce costs while ensuring quality.

[0040] Wherein, the average particle size of the mixed vanadium-titanium powder is less than 20.0 mm.

[0041] In this application, reasonable particle size control can effectively ensure the sintering efficiency and effect, and effectively improve the output and quality.

[0042] The following are specific embodiments of the present application

[0043] Example 1

[0044] The low-cost sintered ore provided in this embodiment comprises the following components in percentage by mass:

[0045] Longmang vanadium titanium powder 17.1%,

[0046] Taihe vanadium titanium powder 5.0%,

[0047] Chile meal 4.0%;

[0048] FMG mixed powder 1.4%,

[0049] BRBF Brazilian powder 25%,

[0050] Australian powder Pb 23.1%,

[0051] Super special powder 6%,

[0052] High silicon bar 4.1%,

[0053] Roy Hill 1.2%;

[0054] Scrap metal 11%;

[0055] MgO 2.1%.

[0056] Example 2

[0057] The low-cost sintered ore provided in this embodiment comprises the following components in percentage by mass:

[0058] Longmang vanadium titanium powder 15.0%,

[0059] Taihe vanadium titanium powder 7%,

[0060] Chile meal 3%;

[0061] FMG mixed powder 5%,

[0062] BRBF Brazilian powder 26.3%,

[0063] Australian powder Pb 23.1%,

[0064] High silicon bar 3.1%,

[0065] Roy Hill 5%;

[0066] Scrap metal 10.6%;

[0067] MgO 1.9%.

[0068] Example 3

[0069] The low-cost sintered ore provided in this embodiment comprises the following components in percentage by mass: 15% of Lomon Vanadium Titanium Powder,

[0070] Taihe vanadium titanium powder 8%,

[0071] Chile meal 3%;

[0072] FMG mixed powder 5%,

[0073] BRBF Brazilian powder 23.5%,

[0074] Australian powder Pb 23%,

[0075] Super special powder 0.9%,

[0076] High silicon bar 4.5%,

[0077] Roy Hill 4.1%;

[0078] Scrap metal 10.7%;

[0079] MgO 2.3%.

[0080] Example 4

[0081] The low-cost sintered ore provided in this embodiment comprises the following components in percentage by mass:

[0082] Chengde vanadium titanium powder 2.5%,

[0083] Longmang vanadium titanium powder 13%,

[0084] Taihe vanadium titanium powder 8%,

[0085] Anning vanadium titanium powder 1.5%;

[0086] Chile meal 0.5%;

[0087] FMG mixed powder 2.5%,

[0088] BRBF Brazilian powder 26%,

[0089] Australian powder Pb 22.1%,

[0090] Super special powder 2.5%,

[0091] High silicon bar 6.0%,

[0092] Roy Hill 2.5%;

[0093] Scrap metal 11%;

[0094] MgO 1.9%.

[0095] Example 5

[0096] The low-cost sintered ore provided in this embodiment comprises the following components in percentage by mass:

[0097] Chengde vanadium titanium powder 5.0%,

[0098] Longmang vanadium titanium powder 11.6%,

[0099] Taihe vanadium titanium powder 8%,

[0100] Anning vanadium titanium powder 3%;

[0101] BRBF Brazilian powder 26%,

[0102] Australian powder Pb 22%,

[0103] Super special powder 1.6%,

[0104] High silicon bar 6.4%,

[0105] Roy Hill 3.3%;

[0106] Scrap metal 11%;

[0107] MgO 2.1%.

[0108] The sintered ore in Examples 1-5 was subjected to a sintering cup test, and the results are shown in the following table:

[0109]

[0110]

[0111] As can be seen from the above table, the sintered ore provided in this application reduces the cost without affecting the quality of the sintered ore, has good economic efficiency, and has broad application prospects.

[0112] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A low-cost sintered ore, characterized in that: Contains the following components in mass percentage: Vanadium titanium powder 20-30%; Coarse powder 0-5%; Rich ore powder 55-75%; Scrap metal 10-15%; MgO 1.9-2.3%; The rich ore powder is a mixed rich ore powder composed of at least four of FMG mixed powder, BRBF Brazilian powder, Australian powder Pb, super special powder, high silicon Brazilian powder and Royshan powder; Among them, the addition ratio of FMG mixed powder, BRBF Brazilian powder, Australian powder Pb, super special powder, high silicon Brazilian powder and Royshan in the mixed rich ore powder is 0-1: 5-6: 4-5: 0-2: 0.5-1.5: 0.2-0.6: 2-2.

5.

2. The low-cost sintered ore according to claim 1, characterized in that: The vanadium-titanium powder is a mixed vanadium-titanium powder composed of at least two of Chengde vanadium-titanium powder, Longmang vanadium-titanium powder, Taihe vanadium-titanium powder and Anning vanadium-titanium powder.

3. The low-cost sintered ore according to claim 2, characterized in that: The addition ratio of Chengde vanadium titanium powder, Longmang vanadium titanium powder, Taihe vanadium titanium powder and Anning vanadium titanium powder in the mixed vanadium titanium powder is 0-1:3-4:1-2:0-0.

6.

4. The low-cost sintered ore according to claim 1, characterized in that: The meal is Chilean meal.

5. The low-cost sintered ore according to claim 1, characterized in that: The basicity of the sintered ore is 2.15-2.

25.

6. The low-cost sintered ore according to claim 2, characterized in that: The average particle size of the mixed vanadium-titanium powder is less than 20.0 mm.

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