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Method for preparing hot-pressed blocks from low-grade iron high-titanium blast furnace slag

A high-titanium type and blast furnace slag technology, applied in chemical instruments and methods, solid separation, magnetic separation, etc., can solve the problems of secondary pollution, difficult separation of slag and iron, and high processing cost, so as to improve the utilization rate and the preparation process The process is simple and easy to control, and the effect of simple preparation process

Active Publication Date: 2021-02-26
PANZHIHUA HUANYE METALLURGICAL SLAG DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for preparing hot briquettes from low-grade iron-high-titanium blast furnace slag. , making it into a hot briquette, which can be directly used in the furnace, effectively solving the problems of difficult separation of slag and iron, high processing cost and easy secondary pollution in the prior art

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  • Method for preparing hot-pressed blocks from low-grade iron high-titanium blast furnace slag

Examples

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Effect test

Embodiment 1

[0020] A method for preparing hot briquettes from low-grade iron and high titanium blast furnace slag, comprising the following steps:

[0021] (1) Crushing the low-grade iron and high titanium type blast furnace slag, and then magnetically separating it in a magnetic field of 2000 Gauss and 500 Gauss successively to obtain iron slag; the magnetic iron grade of the iron slag is lower than 30%, and the particle size is less than 10mm;

[0022] (2) crushing the iron slag obtained in step (1) to below 1.5 mm, mixing the iron slag with anthracite or carbon black in a weight ratio of 2:1 after crushing, drying to obtain a mixture with a moisture content less than 3%;

[0023] (3) preheating the mixture obtained in step (2) at 400°C, then reducing at 1200°C, cooling to below 200°C, and sequentially undergoing magnetic separation and crushing to obtain magnetically separated iron;

[0024] (4) Briquetting the magnetically separated iron obtained in step (3) under the condition of 2t / ...

Embodiment 2

[0026] A method for preparing hot briquettes from low-grade iron and high titanium blast furnace slag, comprising the following steps:

[0027] (1) Crushing the low-grade iron and high titanium type blast furnace slag, and then magnetically separating it in a magnetic field of 2300 Gauss and 700 Gauss successively to obtain iron slag; the magnetic iron grade of the iron slag is lower than 30%, and the particle size is less than 10mm;

[0028] (2) crushing the iron slag obtained in step (1) to below 1.5 mm, mixing the iron slag with anthracite or carbon black in a weight ratio of 3:1 after crushing, drying to obtain a mixture with a moisture content less than 3%;

[0029] (3) Preheating the mixture obtained in step (2) at 450°C, then reducing at 1200°C, cooling to below 200°C, and sequentially undergoing magnetic separation and crushing to obtain magnetically separated iron;

[0030] (4) Briquetting the magnetically separated iron obtained in step (3) under a linear pressure of...

Embodiment 3

[0032] A method for preparing hot briquettes from low-grade iron and high titanium blast furnace slag, comprising the following steps:

[0033] (1) Crushing the low-grade iron and high titanium type blast furnace slag, and then magnetically separating it in a magnetic field of 2600 Gauss and 800 Gauss successively to obtain iron slag; the magnetic iron grade of the iron slag is lower than 30%, and the particle size is less than 10mm;

[0034] (2) crushing the iron slag obtained in step (1) to below 1.5 mm, mixing the iron slag with anthracite or carbon black in a weight ratio of 3:1 after crushing, drying to obtain a mixture with a moisture content less than 3%;

[0035] (3) Preheating the mixture obtained in step (2) at a temperature of 500°C, then reducing at a temperature of 1250°C, cooling to below 200°C, and sequentially undergoing magnetic separation and crushing to obtain magnetically separated iron;

[0036] (4) Briquetting the magnetically separated iron obtained in s...

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Abstract

The invention discloses a method for preparing hot-pressed blocks from low-grade iron high-titanium blast furnace slag. The method comprises the following steps: crushing the low-grade iron high-titanium blast furnace slag, and carrying out magnetic separation in 2,000-3,000 Gauss and 500-1,000 Gauss magnetic fields to obtain slag iron; crushing the slag iron, mixing the crushed slag iron with a reducing agent, and carrying out drying to obtain a mixture; preheating the mixture at the temperature of 400-600 DEG C, carrying out reducing at the temperature of 1,200-1,300 DEG C, cooling to the temperature below 200 DEG C, and sequentially performing magnetic separation and crushing to obtain magnetic separation iron; and briquetting the magnetic separation iron to obtain the hot-pressed blocks. According to the method, the technological process is simple and easy to control, iron in the low-grade iron high-titanium blast furnace slag is reasonably utilized and prepared into the hot-pressed blocks, the hot-pressed blocks can be directly put into a furnace to be used, and the problems that in the prior art, the slag-iron separation difficulty is large, the treatment cost is high, and secondary pollution is likely to be generated are effectively solved.

Description

technical field [0001] The invention relates to the technical field of recycling high-titanium blast furnace slag, in particular to a method for preparing hot briquettes from low-grade iron high-titanium blast furnace slag. Background technique [0002] In recent years, with the continuous development of the metallurgical industry, a large amount of metallurgical slag has been accumulated. Now various scientific research units are conducting research on the comprehensive utilization of metallurgical slag. The blast furnace slag produced by Panzhihua Iron and Steel is about 4 million tons per year. Since the composition and ore phase of the high-titanium blast furnace slag are relatively complex, it is a man-made mine, and the valuable elements in the high-titanium blast furnace slag should be separated. It is difficult to fully utilize it. At present, the iron and slag are mainly separated, and then the iron and slag are separately studied and utilized. The iron-containing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/04C22B1/00C21B13/00B02C21/00B02C23/08B03C1/02
CPCC21B3/04C22B1/005C21B13/00B02C21/00B02C23/08B03C1/02Y02W30/50
Inventor 鲜中菊王彬游平全杨志远姚增远周吉胡玉平
Owner PANZHIHUA HUANYE METALLURGICAL SLAG DEV CO LTD
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