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Sintered ore based on limonite with high crystal water and magnetic separation tailings and production method of sintered ore

A production method and limonite technology are applied to sinter and its production field based on high crystalline water limonite and magnetic separation tailings, and can solve the problems of sintering product quality influence, high content of harmful elements, and high content of crystal water , to achieve the effect of optimizing the sintering process parameters, improving the quality of sintering ore, and optimizing the structure of materials used.

Active Publication Date: 2021-10-22
红河钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently used limonite has high crystal water content, high burning loss, and low temperature of sintering. During the sintering process, the ore is easy to shrink to form a sintered ore with thin walls and large pores. Adding a large amount will have a negative impact on the sintering product quality; magnetic The tailings are mainly a large amount of iron-containing tailings produced by tin factories, aluminum factories, and copper factories in the surrounding areas of the Honghe River. Higher, if these tailings can be used together with limonite, waste can be turned into treasure, which can further reduce the cost of mining for enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The sinter production method based on high crystalline hydrolimonite and magnetic separation tailings of the present embodiment comprises the following steps:

[0048] Step (1) Optimizing ore blending

[0049] When using highly crystalline hydrolimonite, add a certain proportion of fine-grained concentrate to obtain a mixed ore; the mixed ore includes the following mass fraction materials, as shown in Table 1:

[0050] Table 1 Mixed ore ratio

[0051] Limonite fine grade concentrate Magnetic separation tailings blast furnace return total 65 17 4 14 100

[0052] The heap building parameters are shown in Table 2:

[0053] Table 2 Mixed ore stacking parameters

[0054] project Stacking capacity (t) Stacking layers (layers) Heap flow (t / h) Heap parameters 70000 240 600

[0055] Step (2) Preparation for sintering

[0056] The sintering ratio is shown in Table 3:

[0057] Table 3 Sintering ratio

[0058] ...

Embodiment 2

[0065] The sinter production method based on high crystalline hydrolimonite and magnetic separation tailings of the present embodiment comprises the following steps:

[0066] Step (1) Optimizing ore blending

[0067] When using highly crystalline hydrolimonite, add a certain proportion of fine-grained concentrate to obtain a mixed ore; the mixed ore includes the following mass fractions of materials, as shown in Table 1:

[0068] Table 1 Mixed ore ratio

[0069] Limonite fine grade concentrate Magnetic separation tailings blast furnace return total 55 25 6 14 100

[0070] The heap building parameters are shown in Table 2:

[0071] Table 2 Mixed ore stacking parameters

[0072] project Stacking capacity (t) Stacking layers (layers) Heap flow (t / h) Heap parameters 70000 240 600

[0073] Step (2) Preparation for sintering

[0074] The sintering ratio is shown in Table 3:

[0075] Table 3 Sintering ratio

[0076] ...

Embodiment 3

[0083] The sinter production method based on high crystalline hydrolimonite and magnetic separation tailings of the present embodiment comprises the following steps:

[0084] Step (1) Optimizing ore blending

[0085] When using highly crystalline hydrolimonite, add a certain proportion of fine-grained concentrate to obtain a mixed ore; the mixed ore includes the following mass fractions of materials, as shown in Table 1:

[0086] Table 1 Mixed ore ratio

[0087] Limonite fine grade concentrate Magnetic separation tailings blast furnace return total 45 33 8 14 100

[0088] The heap building parameters are shown in Table 2:

[0089] Table 2 Mixed ore stacking parameters

[0090] project Stacking capacity (t) Stacking layers (layers) Heap flow (t / h) Heap parameters 70000 240 600

[0091] Step (2) Preparation for sintering

[0092] The sintering ratio is shown in Table 3:

[0093] Table 3 Sintering ratio

[0094] ...

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Abstract

The invention relates to sintered ore based on limonite with high crystal water and magnetic separation tailings and a production method of the sintered ore. The method comprises the following steps that during ore blending, fine-fraction concentrate is used as adhesive powder and is adhered to the surface of the limonite during sintering pelletizing, so that low assimilation temperature of the limonite is delayed, the liquid phase flow is good, and the generation of thin-wall macropores of the sintered ore is reduced; and the 200-mesh particle fraction proportion of the magnetic separation tailings is increased, and the particle size is reduced, so that the assimilation temperature of the magnetic separation tailings is reduced, the magnetic separation tailings wraps the surface of the limonite as adherents, and the sintered ore is finally obtained through sintering. Based on the method, the quality of the finally obtained sintered ore is greatly improved compared with that of the sintered ore before, the drum index of the sintered ore is improved to 80% or above compared with that of 78.5% before, and the effect is remarkable.

Description

technical field [0001] The invention belongs to the field of sintered ore, and in particular relates to a sintered ore based on high-crystalline hydrolimonite and magnetic separation tailings and a production method thereof. Background technique [0002] With the rise of the international iron ore general index, the price of imported ore continues to climb, which has brought difficulties for iron and steel enterprises to reduce costs and create benefits. In order to reduce production costs, Honggang has targeted relatively cheap limonite and magnetic separation tailings as raw materials for the ore used in sintering. [0003] The currently used limonite has high crystal water content, high burning loss, and low temperature of sintering. During the sintering process, the ore is easy to shrink and form a sintered ore with thin-walled large pores. Adding a large amount will have a negative impact on the sintering product quality; magnetic The tailings are mainly a large amount...

Claims

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Application Information

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IPC IPC(8): C22B1/16C21B5/00
CPCC22B1/16C21B5/008
Inventor 普松陈必胜刘涛杨凯移小义
Owner 红河钢铁有限公司