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Sintering ore-proportioning method for different kinds of iron material mostly comprising hematite concentrate

A hematite concentrate and multi-variety technology, which is applied in the field of agglomeration of sintered ore as raw material for ironmaking, can solve the problem of mineral composition regardless of the influence of FeO sintering process, regardless of the type of iron ore, the complementarity of sintering characteristics, and the strength of sintered ore To improve the strength, improve the sintering performance and reduce the sintering temperature

Active Publication Date: 2009-05-06
ANSTEEL GRP MINING CO LTD +1
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  • Description
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Problems solved by technology

The existing batching method only considers whether the grade of iron material meets the demand of sinter ore, and mixes various iron materials according to a certain ratio for production, without considering the type of iron ore, the complementarity of sintering characteristics, and the FeO in iron material. Influence on the sintering process and the mineral composition of the finished sinter
If the ingredients are prepared according to the existing method, the higher the proportion of hematite in the iron material, the more the fuel will be added, the lower the sintering productivity will be, the higher the energy consumption will be, the lower the strength of the sintered ore will be and the lower the degree of reduction will be.

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  • Sintering ore-proportioning method for different kinds of iron material mostly comprising hematite concentrate

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Embodiment Construction

[0014] The present invention will be further described by the following examples.

[0015] First determine the other iron materials used. In the embodiment of the present invention, A magnetite concentrate (a type of A magnetite), B magnetite concentrate (a type of B magnetite) and iron oxide scale are used, and then the hematite concentrate Check the chemical composition of other iron materials. The measured chemical composition and burning loss of each iron material are shown in Table 1. In order to better illustrate the problem, the embodiment of the present invention selects hematite concentrate with fine particle size and low FeO content as an example.

[0016] Table 1 Chemical composition of iron material (%)

[0017] project TFe FeO SiO 2 CaO MgO Burn Hematite concentrate 64.70 1.35 6.15 0.15 0.30 2.01 A magnetite concentrate 68.26 21.01 3.50 0.15 0.30 -1.62 B magnetite concentrate 66.17 28.65 7.00 0.30 0.35 -2.32 ...

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Abstract

The invention discloses a sintering allocating method of multiple ferric materials based on hematite as host, which is characterized by the following: setting the rate of refined hematite at 40-70% with the proportion of other high-FeO ferric material at 30-60%; setting the alkaline degree of sintered ore at 1.5-2.5 with sintered FeO not less than 9% in the mixed material; improving sintering quality and production; rationalizing the sintered ore structure.

Description

Technical field [0001] The invention belongs to the agglomeration technology of iron smelting raw material sintered ore, and particularly relates to a ore blending method in the iron ore sintering process. Background technique [0002] With the rapid development of my country's economy, the domestic demand for iron ore is increasing. In recent years, iron ore imports have increased year after year. In 2004, my country imported 208 million tons of iron ore. According to the research report, my country's easy-to-select and good-sintering magnetite resources are facing an increasing shortage, and a large number of poor hematite resources with poor sintering properties have yet to be developed and utilized. [0003] The main component of magnetite is Fe 3 O 4 , During sintering, when the liquid phase has not yet fully developed, it can be bonded to each other to form. This is because the low-valent oxides of magnetite are prone to oxidative exothermic reactions during the sintering p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
Inventor 王常秋于淑娟
Owner ANSTEEL GRP MINING CO LTD
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