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Method for producing ore briquettes from fine ores with pitch as adhesive, ore briquettes and application of ore briquettes

A technology of binder and fine ore, which is applied in the field of powder ore to produce pellets, can solve the problems of non-reduction, smoke pollution, etc., and achieve the effects of convenient management, low capital investment, and high pellet strength

Active Publication Date: 2015-09-16
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a method that can completely dehydrogenate the briquette, greatly increase the strength of the finished briquette, reduce the consumption of asphalt, solve the problem of smoke pollution, and at the same time make the finished briquette Method for producing agglomerated ore from fine ore with asphalt as binder without reducing ore grade, the agglomerated ore and its application

Method used

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  • Method for producing ore briquettes from fine ores with pitch as adhesive, ore briquettes and application of ore briquettes
  • Method for producing ore briquettes from fine ores with pitch as adhesive, ore briquettes and application of ore briquettes
  • Method for producing ore briquettes from fine ores with pitch as adhesive, ore briquettes and application of ore briquettes

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Effect test

Embodiment 1

[0038] A kind of method of the present invention is that the fine ore that takes bitumen as binding agent is produced agglomerate, comprises the following steps:

[0039] 1) Mix 89.0wt% titanium concentrate, 3.0wt% bentonite, and 8.0wt% asphalt according to the weight of the ingredients on a dry basis, and add water to the batch. The mixing time is 10 minutes, so that the water content of the mixture is 7.5%. . It is measured that the raw ball falls 1.7 times / 0.5m, and the compression resistance is 2.5Kg / piece.

[0040] 2) Put the dough in a drying oven for drying and dehydration: start from room temperature (25°C) to 160°C for 20 minutes, then keep warm at 160°C for 10 minutes. The air gas premixed flameless burner is used for heating, the primary air is input according to the air consumption coefficient n=1.45, and the secondary air is input into the combustion chamber so that the total air consumption coefficient n=7.25. The volume composition of the heating medium in the...

Embodiment 2

[0046] A kind of method of the present invention is that the fine ore that takes bitumen as binding agent is produced agglomerate, comprises the following steps:

[0047] 1) Mix 90.5wt% titanium concentrate, 3.0wt% bentonite, and 6.5wt% asphalt according to the weight of the ingredients on a dry basis, mix them with water for 10 minutes, and make the water content of the mixture 7.5% ( The actual measurement is 7.3%), and it is measured that the raw mass falls 1.8 times / 0.5m, and the compression resistance is 2.4Kg / piece.

[0048] 2) Put the dough in a drying oven for drying and dehydration: start from room temperature (25°C) to 160°C for 20 minutes, then keep warm at 160°C for 10 minutes. The air gas premixed flameless burner is used for heating, the primary air is input according to the air consumption coefficient n=1.53, and the secondary air is input into the combustion chamber so that the total air consumption coefficient n=7.10. The volume composition of the heating med...

Embodiment 3

[0054] A kind of method of the present invention is that the fine ore that takes bitumen as binding agent is produced agglomerate, comprises the following steps:

[0055] 1) Mix 92wt% titanium concentrate, 3.0wt% bentonite, and 5wt% asphalt according to the weight of the ingredients on a dry basis, and mix them with water for 10 minutes to make the water content of the mixture 7.5%. The raw ball falls 1.8 times / 0.5m, and the compression resistance is 2.3Kg / piece.

[0056] 2) Put the dough in a drying oven for drying and dehydration: start from room temperature (25°C) to 160°C for 20 minutes, then keep warm at 160°C for 10 minutes. The air gas premixed flameless burner is used for heating, the primary air is input according to the air consumption coefficient n=1.50, and the secondary air is input into the combustion chamber so that the total air consumption coefficient n=7.15. The volume composition of the heating medium in the furnace is: 1.88% CO 2 , 2.06%H 2 O, 78.19% N ...

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Abstract

The invention discloses a method for producing ore briquettes from fine ores with pitch as an adhesive. The method comprises the following steps: 1) preparing raw ore briquettes from the fine ores as the raw material and by taking the pitch as the adhesive; 2) drying and dehydrating the raw ore briquettes; 3) orderly performing primary dehydrogenation and secondary dehydrogenation on the dried and hydrated raw ore briquettes, wherein the primary dehydrogenation is performed in a strong oxidative medium, while the secondary dehydrogenation is performed in a weakly oxidative or neutral medium; and 4) performing carbonization consolidation on the ore briquettes after the treatment in the step 3), and slowly cooling the ore briquettes obtained after carbonization consolidation in a sealed furnace until the temperature is below 300 DEG C, thereby obtaining the finished product ore briquettes. The ore briquettes prepared by use of the process can be applied to blast furnace smelting, electric arc smelting, vertical furnace smelting, rotary kiln smelting and bottom converter smelting. According to the method, due to the primary dehydrogenation, the secondary dehydrogenation and the carbonization consolidation in the process, the prepared ore briquettes are thoroughly dehydrogenated without oxidation; and the finished briquettes contain no tar and other toxic and harmful compounds, and are safe and environment-friendly.

Description

technical field [0001] The present invention relates to a method for producing pellets from powdered ore, in particular to a method for preparing pellets from powdered ore using asphalt as a binder, the pellets and its application. Background technique [0002] Pitch is the residue of coal tar and petroleum distillation. It is widely used in various fields of the national economy because its chemical composition is mainly carbon and hydrogen, and it has excellent insulation, heat insulation, waterproof, anti-corrosion, and anti-rust properties. All kinds of carbon materials necessary for advanced defense industry, electronic and electrical industry, and large-scale advanced manufacturing industry, such as carbon fiber on spacecraft, pitch coke and petroleum necessary for iron and steel industry, electrolytic aluminum industry, ferroalloy smelting and yellow phosphorus production Coke and various electrodes, down to waterproof, anti-corrosion, heat insulation materials, insul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/245
Inventor 李肇佳陈文如宁顺明万洪强
Owner CHANGSHA RES INST OF MINING & METALLURGY
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