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High titan type low FeO content sinter and method for preparing same
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A high-titanium, sintered ore technology, applied in the field of iron ore agglomeration, can solve the problems of greatly affecting equipment life, poor FeO content, and affecting environmental friendliness
Inactive Publication Date: 2009-01-07
PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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[0005] (2) The sintering process parameters are backward, the sintering carbon is high, and the thickness of the material layer is thin, which is not conducive to improving the production quality
Excessively high FeO content also has a great impact on equipment life
[0007] (4) The reducibility of sinter is poor, the condition of blast furnacesmelting is unstable, the forward flow is not good, the utilization factor is low, and the coke ratio is high
[0008] (5) High consumption of solid fuel sintered with high FeO content, CO 2 The emission is large, which affects environmental friendliness and violates the regulations on reducing CO 2 Emissions under the Kyoto Protocol treaty (entered into force in 2005)
Ordinary sinters are also committed to reducing the FeO content, but due to the different sintering mechanisms and poor coordination of auxiliary conditions, the effect of reducing FeO content is poor
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preparation example Construction
[0025] The sinter preparation method includes the following steps: A, batching, B, mixing, C, cloth, D, ignition, sintering, E, thermal crushing, F, thermal screening, G, cooling, H, screening, and immediately after screening Can be smelted in a blast furnace. Specifically, the mixing in step B can be mixed twice; the sieving in step H can be sintered screening and sub-ditch screening.
[0026] Among them, after mixing, the moisture content of the mixture is controlled to be 7.20±0.20%, which has proved to be the most suitable moisture for granulating vanadium-titanium magnetite concentrate. The mixed moisture of vanadium-titanium magnetite concentrate is too high or too low, which is not conducive to granulation. Excessive moisture formation will form an over-wet layer and worsen sintering, and too low moisture will affect the granulation effect.
[0027] Among them, the height of the material layer is 500-680mm when cloth. In this range, the thick material layer cloth can prolon...
Embodiment 1
[0032] The examples used the following sintering raw materials with the following proportions: vanadium-titanium magnetite concentrate 55%, Australian fines 10%, domestic high-grade fines 12%, domestic medium-grade fines 3%, limestone 6%, quicklime 7%, and additional 35% return to mine. The fuel is cokepowder or anthracite, the cokepowder ratio is 3-7% or the anthracite ratio is 4-8% (corresponding to the mixture carbon content is 2.2-3.8%), 9 batches of sintered ore with different FeO content were prepared, The technical effects and related smelting performance indexes are shown in Table 2. In addition, the main phases and contents of some batches of sinters with different FeO content were tested. The results are shown in Table 3.
[0033] 1. Technical effect
[0034] Table 2 The effect of different FeO content on the quality and energy consumption of sintered ore
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Abstract
The invention belongs to the agglomeration field of iron ore, in particular to a high titaniumsintering ore with a low FeO content and a preparation method thereof. The technical problem needed to be solved by the invention is to provide a method for preparing the high titaniumsintering ore with a low FeO content by taking the v-ti magnetite concentrate ore specially owned by Panzhihua as the material. The invention is mainly characterized in that the sintering material is the high titanium v-ti magnetite concentrate ore; when batching, the carbon addition amount is 2.6 to 3.2 percent; the FeO content of the sintering ore obtained by sintering is 6.5 to 9.5 percent; the FeO content is preferably to be 7.0 to 8.5 percent. The FeO content of the sintering ore is controlled to be 6.5 to 9.5 percent by controlling a fuel mixture ratio with a high precision, thus ensuring the intensity of the sintering ore, improving the performance of the metallurgy and achieving the optimized effect on the aspects of blast furnacemetallurgy, cost control and environment protection.
Description
Technical field [0001] The invention belongs to the field of iron ore agglomeration, and specifically relates to a high-titanium type low FeO content sinter and a preparation method thereof. Background technique [0002] Many exploratory studies have been carried out in this field on the influence of different FeO values on the properties of sintered ore. The basic conclusion points out that too high or too low FeO values are not conducive to improving the quality of sintered ore and metallurgical properties. [0003] The current development trends in this field are dedicated to reducing the FeO content of sinters, because sinters with high FeO content have the following disadvantages: [0004] (1) The composition of the sintered ore is poor, and the silicateliquid phase is used as the binding phase, which tends to produce vitreous. The macrostructure of sinter is dense with large pores and thin walls or few pores, and the sinter has poor strength. [0005] (2) The sintering...
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