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Sinter based on high crystalline water limonite and magnetic separation tailings and its production method

A production method and limonite technology are applied to sinter based on high crystalline water limonite and magnetic separation tailings and the production field thereof, 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: 2022-07-01
WUKUN STEEL
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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 water limonite and magnetic separation tailings of the present embodiment includes the following steps:

[0048] Step (1) Optimizing Ore Blending

[0049] When using high crystalline water limonite, a certain proportion of fine-grained concentrate is added to obtain a mixed ore; the mixed ore includes materials with the following mass fractions, as shown in Table 1:

[0050] Table 1 Proportion of mixed ore

[0051] Limonite fine-grained 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 Heaping parameters of mixed ore

[0054] project Stacking amount (t) Stacking layers (layers) Stacking flow (t / h) heap building parameters 70000 240 600

[0055] Step (2) Preparation for sintering

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

[0057] Table 3 S...

Embodiment 2

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

[0066] Step (1) Optimizing Ore Blending

[0067] When using high crystalline water limonite, a certain proportion of fine-grained concentrate is added to obtain a mixed ore; the mixed ore includes materials with the following mass fractions, as shown in Table 1:

[0068] Table 1 Proportion of mixed ore

[0069] Limonite fine-grained 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 Heaping parameters of mixed ore

[0072] project Stacking amount (t) Stacking layers (layers) Stacking flow (t / h) heap building parameters 70000 240 600

[0073] Step (2) Preparation for sintering

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

[0075] Table 3 S...

Embodiment 3

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

[0084] Step (1) Optimizing Ore Blending

[0085] When using high crystalline water limonite, a certain proportion of fine-grained concentrate is added to obtain a mixed ore; the mixed ore includes materials with the following mass fractions, as shown in Table 1:

[0086] Table 1 Proportion of mixed ore

[0087] Limonite fine-grained 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 Heaping parameters of mixed ore

[0090] project Stacking amount (t) Stacking layers (layers) Stacking flow (t / h) heap building parameters 70000 240 600

[0091] Step (2) Preparation for sintering

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

[0093] Table 3 S...

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Abstract

The invention relates to a sintered ore based on highly crystalline water limonite and magnetic separation tailings and a production method thereof. The method comprises the following steps: during ore blending, fine-grained concentrate is used as adhesive powder, and during sintering and pelletizing Adhering to the surface of limonite, delaying the assimilation temperature of limonite is low, and the liquid phase flows well, thereby reducing the formation of thin-walled large pores in sintered ore; increasing the proportion of magnetic separation tailings-200 mesh size, and reducing the particle size to reduce the magnetic The assimilation temperature of the selected tailings, as an adhering matter, is wrapped on the surface of the limonite, and sintered ore is finally obtained by sintering. Based on the method of the invention, the quality of the finally obtained sintered ore is greatly improved compared with the previous one, and the drum index of the sintered ore is increased to more than 80% compared with the previous 78.5%, 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 water limonite 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 brings difficulties to iron and steel enterprises to reduce costs and create benefits. In order to reduce production costs, Red Steel has targeted the relatively inexpensive limonite and magnetic separation tailings as raw materials for sintering. [0003] The limonite currently used has high crystal water content, high burning loss, and low pass-through temperature. During the sintering process, the ore is easy to shrink to form sintered ore with thin-walled large pores. A large amount of addition will negatively affect the quality of sintering products; The tailings are mainly iron-containing tailings produced i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16C21B5/00
CPCC22B1/16C21B5/008
Inventor 普松陈必胜刘涛杨凯移小义
Owner WUKUN STEEL
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