Dressing and smelting process of magnetic iron ore with high manganese content, high sulfur content and high alkalinity

A technology of magnetite ore and high alkalinity, applied in blast furnaces, magnetic separation, blast furnace details, etc., can solve problems such as waste of resources, environmental pollution, small particle size of ore powder, etc., and achieve the effect of reducing sulfur content

Inactive Publication Date: 2011-12-28
刘永红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through this beneficiation process, high-grade iron concentrate powder can be obtained, but this process is not suitable for magnetite ores with high iron content, high ignition loss and alkalinity that are not magnetized. The reasons are as follows: In the above-mentioned beneficiation process, The particle size of the ore powder obtained after being ground by a ball mill is small, and the beneficial elements such as magnetic iron elements and non-magnetic iron elements, manganese elements, calcium oxide, and magnesium oxide in the ore are completely dissociated; when the ore pulp flows through the magnetic separator , only the magnetized Fe 3 o 4 It can be extracted by a magnetic separator, while other beneficial elements such as iron, manganese, calcium oxide and magnesium oxide that are not magnetized are discharged with the tailings, which greatly wastes resources
At the same time, since alkaline oxides such as calcium oxide and magnesium oxide are discharged with the tailings, the obtained iron concentrate powder needs to be added with additives such as calcium oxide when used in ironmaking, which increases the cost of smelting
In addition, because the beneficiation process requires the use of ball mills and water magnetic separators, it consumes a lot of electricity and water resources, which not only increases the cost, but also causes environmental pollution due to the discharge of tailings and sewage

Method used

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  • Dressing and smelting process of magnetic iron ore with high manganese content, high sulfur content and high alkalinity
  • Dressing and smelting process of magnetic iron ore with high manganese content, high sulfur content and high alkalinity
  • Dressing and smelting process of magnetic iron ore with high manganese content, high sulfur content and high alkalinity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Taking the deep primary manganese-containing high-sulfur and high-alkalinity magnetite ore in the Liudaogou iron ore area of ​​Linjiang City, Jilin Province as raw ore, the raw ore is analyzed for composition, the results are shown in Table 1, and Table 1 is the composition analysis of the raw ore provided by the embodiment of the present invention result.

[0064] The compositional analysis result of the raw ore that the embodiment of the present invention provides in table 1

[0065]

[0066] The phase analysis of the iron element was carried out, and the results are shown in Table 2. Table 2 is the result of the phase analysis of the iron element of the raw ore provided by the embodiment of the present invention.

[0067] The iron element phase analysis result of the raw ore that table 2 the embodiment of the present invention provides

[0068]

[0069] Continuously send the raw ore to a jaw crusher with a specification of 300*750 for coarse crushing, and crus...

Embodiment 2

[0074] Get 0.95 tons of concentrate powder prepared in Example 1 and sinter according to methods well known to those skilled in the art to obtain 0.76 tons of manganese-containing high-alkalinity sintered ore. The composition of the sintered ore is analyzed. The results are shown in Table 4, which is The composition analysis results of the manganese-containing high-basicity sintered ore provided by the examples of the present invention.

[0075] The compositional analysis results of the manganese-containing high-basicity sintered ore provided by the embodiment of the present invention in table 4

[0076]

[0077] Comparing Table 4 with Table 3, it can be seen that after sintering, the grades of iron, manganese and other beneficial elements in the sintered ore have been improved, the basicity has not changed, and the content of sulfur has decreased to 0.05%, indicating that the sintered ore can be used for Smelting iron and steel to produce manganese-containing pig iron or m...

Embodiment 3

[0079] Take 0.76 tons of sinter prepared in Example 2 and carry out blast furnace ironmaking well known to those skilled in the art to obtain 0.48 tons of pig iron and 0.21 tons of manganese-rich slag, wherein the iron content in the pig iron is 90%, and the manganese content in the manganese-rich slag is 29%.

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Abstract

The invention provides a dressing and smelting process of magnetic iron ore with high manganese content, high sulfur content and high alkalinity, which comprises the following steps: a) providing the magnetic iron ore with high manganese content, high sulfur content and high alkalinity, wherein the magnetic iron ore contains 1%-15% by weight of manganese element, 0.5%-4% by weight of sulfur element and 30%-50% by weight of iron element, Fe3O4 accounts for 6% by weight at least, the loss on ignition of the magnetic iron ore with high manganese content, high sulfur content and high alkalinity is 6%-30%, and the alkalinity is not less than 1.2; b) crushing the magnetic iron ore with high manganese content, high sulfur content and high alkalinity into fine ore with the particle size of 0.1mm-8mm, carrying out dry magnetic separation and obtaining concentrate powder; and c) sintering the concentrate powder, and obtaining sintered ore with high manganese content and high alkalinity. The dressing and smelting process only carries out the crushing on the magnetic iron ore with high manganese content, high sulfur content and high alkalinity and does not carry out fine grinding, and the non-magnetizing beneficial elements in the ore are not fully dissociated with the magnetizing iron element, thereby retaining the beneficial elements to the maximum extent and not wasting the resources.

Description

technical field [0001] The invention relates to the technical field of ore dressing and smelting, in particular to a dressing and smelting process of manganese-containing, high-sulfur, high-alkalinity magnetite ore. Background technique [0002] With the development of the iron and steel industry, the demand for iron ore, especially for iron concentrate is increasing. Due to the limited reserves of rich iron ore resources, the effective utilization of rich reserves of low-grade iron ore has become one of the research hotspots. [0003] The existing technology generally adopts the fine grinding water magnetic separation method for low-grade iron ore to increase the grade of iron ore to more than 60%, including the following steps: firstly, the iron ore is crushed through three-stage processes of coarse crushing, medium crushing and fine crushing, The ore with smaller particle size is obtained; the crushed iron ore enters the first to third stage ball mill for fine grinding, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/00B03C1/00C21B5/00
Inventor 刘永红
Owner 刘永红
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