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Rich magnesium dust strengthen sintering additive agent

A technology of strengthening sintering and additives, applied in the field of sintering additives, which can solve the problems of increased cost of sintering raw materials, high fuel consumption, and high decomposition temperature

Inactive Publication Date: 2008-05-07
辽宁华盛矿业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In sintering production, due to the high decomposition temperature of pure limestone and magnesite (870-910°C), magnesite needs to be decomposed into MgO at a higher temperature, so the use of pure magnesite in sintering production needs to be added. More fuel, resulting in high solid fuel consumption per ton of sintered ore, and an increase in the cost of final sintered raw materials

Method used

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Examples

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Effect test

Embodiment 1

[0030] The magnesium-rich powder strengthening sintering additive is made of magnesite and dolomite in the following weight ratios: 60 parts of magnesite and 40 parts of dolomite. The production process is as follows: the above raw materials are coarsely crushed and finely crushed, so that the content of the particle size below 0-30mm is more than 90%; after screening, batching, stirring, and mixing evenly; after sampling, laboratory analysis, and qualified products Package. The MgO content in the finished magnesium-rich powder strengthening sintering additive is 37-40%, and the CaO content is 8-12%.

Embodiment 2

[0032] The magnesium-rich powder strengthening sintering additive is made of magnesite and dolomite in the following weight ratios: 65 parts of magnesite and 35 parts of dolomite. The production process is as follows: the above raw materials are coarsely crushed and finely crushed, so that the content of the particle size below 0-30mm is more than 90%; after screening, batching, stirring, and mixing evenly; after sampling, laboratory analysis, and qualified products Package. The MgO content in the finished magnesium-rich powder strengthening sintering additive is 37-40%, and the CaO content is 8-12%.

Embodiment 3

[0034] The magnesium-rich powder strengthening sintering additive is made of magnesite and dolomite in the following weight proportions: 75 parts of magnesite and 25 parts of dolomite. The production process is as follows: the above raw materials are coarsely crushed and finely crushed, so that the content of the particle size below 0-30mm is more than 90%; after screening, batching, stirring, and mixing evenly; after sampling, laboratory analysis, and qualified products Package. The MgO content in the finished magnesium-rich powder strengthening sintering additive is 37-40%, and the CaO content is 8-12%.

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Abstract

The invention relates to magnesium powder strengthening sintering additive which is made by taking magnesite and limestone as the main raw materials, and adding ascharite through scientific proportion that the magnesite is 65 to 70 shares, dolomite is 25 to 30 shares and the ascharite is 3 to 5 shares. The invention has the advantages of low decomposition temperature (426 DEG C), small needing decomposition heat, long duration of high temperature in sintering process, favorable effect of forming liquid phase, good concretion performance of sintering mine, improved finished product rate of sintering mine and good benefit for reducing the consumption of the solid fuel.

Description

technical field [0001] The invention relates to a sintering additive used in the sintering production process. Background technique [0002] In sintering production, due to the high decomposition temperature of pure limestone and magnesite (870-910°C), magnesite needs to be decomposed into MgO at a higher temperature, so the use of pure magnesite in sintering production needs to be added. More fuel, resulting in high consumption of solid fuel per ton of sintered ore, and an increase in the cost of final sintered raw materials. [0003] In order to enhance sintering quality, reduce energy consumption, and meet the requirements of basicity and metallurgical properties of sinter, it is necessary to add sintering additives to limestone and magnesite in the sintering production process. Sintering additives can strengthen sintering, save energy and reduce pollution. Improving the sintering speed and firing rate and reducing the return rate also have a certain effect. Contents o...

Claims

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Application Information

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IPC IPC(8): C04B2/10
Inventor 毕胜春
Owner 辽宁华盛矿业集团有限公司
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