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Sintering ore additive

A technology of additives and sintered ore, applied in the field of sintered ore additives, can solve problems such as poor reduction characteristics, poor strength and reduction, and serious pulverization

Inactive Publication Date: 2008-08-06
娄底市裕德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are several problems in the quality of high-alkalinity sintered ore: more serious pulverization, more cracks, and relatively complete development; after the alkalinity increases, monocalcium ferrite may be converted into dicalcium ferrite with poor strength and reducibility
[0005] However, the pelletized sinter produced by the existing low-temperature sintering process has low strength, poor reduction characteristics, and high energy consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh raw materials by weight: composite mineralizer, boric acid 30kg, MgO 10kg; oxidation catalyst Fe 2 o 3 · MoO 3 20kg; oxygen enhancer sodium nitrate 25kg; protective agent calcium chloride 15kg.

[0025] Preparation method: crush the above-mentioned raw materials to ≤1mm, mix and stir according to the proportion for 5 minutes, and pack them separately.

[0026] Mix the product of Example 1 with water in a ratio of 1:1, stir evenly, mix it into the sintering mixed raw meal, and then fully stir it to carry out the sintering cup test. The test results are shown in the table below.

[0027] test group

Additives added

Quantity (according to sintered

Ore weight‰)

Fuel ratio%

(weight)

vertical sintering speed

degree mm / min

Drum Index%

Utilization factor

t / m 2 h

0

0

6.11

22.00

64

1.43

1

0.5

5,23

26.38

69

1.64

...

Embodiment 2

[0031] Weigh raw materials by weight: composite mineralizer, borax 15kg, MgO 5kg; oxidation catalyst Fe 2 o 3 · MoO 3 15kg; oxygen enhancer potassium permanganate 20kg; protective agent potassium chloride 15kg.

[0032] The preparation method is the same as in Example 1.

Embodiment 3

[0034] Weigh raw materials by weight: composite mineralizer, boric acid 40kg, MgO 10kg; oxidation catalyst Fe 2 o 3 · MoO 3 20kg; Oxygenating agent potassium nitrate 15kg; Protective agent Sodium chloride 15kg.

[0035] The preparation method is the same as in Example 1.

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PUM

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Abstract

The invention discloses a sintering additive, which comprises the following parts: 20wt%-60wt% composite mineralizer,10wt%-30wt% oxidizing catalyst,15wt%-40wt% oxygenation agent and 10wt%-30wt% protective. The additive can improve sintering oaring strength, which reduces energy consumption effectively.

Description

technical field [0001] The invention relates to a sintered ore additive, in particular to a sintered ore additive which can improve the metallurgical performance of the sintered ore and save energy and reduce consumption. Background technique [0002] The purpose of sintering pellets is to scientifically prepare and sinter iron ore and some materials to provide artificial rich ore with a certain particle size and good metallurgical properties for blast furnace smelting. [0003] In the current sinter production, it is generally required to produce sinter under the conditions of high alkalinity and low FeO, the mineral composition of high alkalinity sinter is less, and the microstructure is generally erosion or eutectic structure, in which magnetite The ore is consolidated together with the binder phase mineral calcium ferrite, etc., so that the sintered ore has good strength and reduction performance. Increasing the basicity of sintered ore can increase the content of calci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
Inventor 钟文毅
Owner 娄底市裕德科技有限公司
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