Pelletization method for vanadium titanium magnet ore concentrate mix with additive rough rice shell
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A vanadium-titanium-magnetite concentrate and rice husk technology, applied in the field of metallurgy, can solve the problems of unstable granulation effect of vanadium-titanium magnetite concentrate mixture, unstable batching amount, bad working environment, etc. Stable, easy to control accurately, improve the effect of granulation
Inactive Publication Date: 2009-01-14
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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[0005] But the above-mentioned industrial experiment of adding rice husk all has the following problems: 1. The rice husk is easily burned by red-hot heat return ore, which makes the granulation effect of vanadium-titanium-magnetite concentrate mixture unstable, thereby affecting the output quality of sintered ore ; 2, above-mentioned industrial experiment all adopts manual feeding mode to sprinkle rice husk in the primary mixer, because it is difficult to accurately grasp the dosage due to personnel feeding, at the same time, there is discontinuity in manual feeding, the problem of extremely unstable batching amount, and the labor intensity is very high. Big, bad working environment
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Embodiment 1
[0017] 1. Ratio of sintered material
[0018] In terms of weight percentage, 55% concentrate + 10% Australian ore + 12% domestic high-grade fine ore + 3% domestic medium-grade fine ore + 7% quicklime + 6% limestone + 5% coke powder
[0019] The rice husk is a by-product of rice processing by a rice production enterprise. The shape is a half-open state after the rice granules are removed. The skeleton has a strong performance of adhering the concentrate powder and quicklime.
[0020] In the sintering production, the proportion of rice husks can be divided into three modes: no addition, addition of 0.4%, and addition of 0.6%, and the proportion is the percentage of the weight of the raw material for sintering.
[0021] 2. See Table 1 and 2 for the particle size composition of raw materials.
[0022] Table 1 The particle size composition of vanadium-titanium magnetite concentrate (weight percent, %)
[0023]
[0024] Table 2 Composition of particle size of iron ore powder, ...
Embodiment 2
[0039] 1. Contrast test results of spraying and non-spraying calcium solution
[0040] Spray and do not spray calcium-containing solution (CaCl2 solution, mass concentration is 0.8%) to the mixture that adds rice chaff 0.4% (percentage by weight), manufactured 2 batches of sintered ore by the method of the present invention, the results are shown in Table 5, Table 6 .
[0041] Table 5 Particle size composition of rice husk spraying and non-spraying calcium-containing solution mixture
[0042]
[0043] Table 6 Sintering technical indicators of rice husk sprayed and not sprayed with calcium solution
[0044] batch
[0045] As can be seen from Table 5, the use of 0.4% rice hulls to spray calcium-containing solution (CaCl 2 solution), the particle size of the sintered mixture was thicker than that without calcium-containing solution, and the average particle size increased by 0.14mm, indicating that after spraying with calcium-containing solution, rice husks were le...
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Abstract
The invention relates to a V-Ti-bearing magnetite concentrate mixing material adding rice hull granulating method, which belongs to the metallurgical field. The invention solves the technical problem that a granulating method of V-Ti-bearing magnetite concentrate mixing material with stable granulating effect is provided. The V-Ti-bearing magnetite concentrate mixing material adding rice hull granulating method of the invention comprises the steps that the rice hull which weight percentage is 0.4 percent to 0.6 percent of that of the mixing material is added into the V-Ti-bearing magnetite concentrate mixing material and is mixed evenly, then granulating is performed; wherein, the rice hull is sprayed with calcium content solution before being mixed. The V-Ti-bearing magnetite concentrate mixing material adding rice hull granulating method of the invention, can not only improve the granulating effect, but also prevent the rice hull from being burned by hot return fines, thus to ensure the sintered ore production stable, and improve the product quality; in addition, the automatic material feeding function of the rice hull is realized, which is convenient for accurate control of the material feeding quantity and the labor intensity of manual feeding is decreased, therefore, the V-Ti-bearing magnetite concentrate mixing material adding rice hull granulating method has an extensive application prospect.
Description
technical field [0001] The invention relates to a granulation method of adding rice husk to a vanadium-titanium magnetite concentrate mixture, and belongs to the field of metallurgy. Background technique [0002] The vanadium-titanium magnetite concentrate mixture is generally made of iron ore powder, returned ore, flux and fuel. Since iron ore powders in my country, especially vanadium-titanium magnetite concentrates, generally contain low iron content, some high-grade or medium-grade iron ore powders are usually added, such as imported ores (Australian ore, Indian ore, Brazil ore). When the vanadium-titanium magnetite concentrate mixture is mixed, different raw materials are put into different ore tanks (see attached figure 1 ), controlled by the computer according to different proportions, all raw materials are fed to one batching belt, then transferred to another mixing belt, and then enter the primary cylinder mixer for mixing for about 3 minutes, and then enter the se...
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