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Electric furnace oxidizing slag treatment method

A technology of electric furnace oxidized slag and treatment method, which is applied in the direction of recycling technology, etc., can solve problems such as waste of resources, and achieve the effects of reducing waste, low equipment requirements, and low processing costs

Pending Publication Date: 2021-03-26
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a treatment method for electric furnace oxidized slag, which can effectively solve the problem of waste of resources existing in the existing treatment methods

Method used

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  • Electric furnace oxidizing slag treatment method

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Experimental program
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Effect test

Embodiment 1

[0031] A treatment method for electric furnace oxidized slag, comprising the following steps:

[0032] (1) Put the oxidized slag at a temperature of 800°C into a container and seal it, then evenly spray water mist on the oxidized slag for heat-stuffing treatment, the weight ratio of water consumption to oxidized slag is 0.4:1, keep The pressure inside the container is 0.3MPa, and the stuffy time is 10h;

[0033] (2) Sieve the oxidized slag after heat-stuffing treatment in step (1) with a 200mm sieve, smash and magnetically separate the sieve > 200mm, and the magnetic separation intensity is 4000Gs to obtain a class of steel slag and tailings;

[0034] (3) continue to repeat the operation in step (2) for the tailings in step (2), then carry out magnetic separation to the sieve <200mm, and the magnetic separation intensity is 3500Gs to obtain the second-class steel slag and tailings,

[0035] (4) Screening the tailings in step (2) with a 50mm sieve, crushing the tailings > 50m...

Embodiment 2

[0038] A treatment method for electric furnace oxidized slag, comprising the following steps:

[0039] (1) Put the oxidation slag at a temperature of 1100°C into a container and seal it, then evenly spray water mist on the oxidation slag for heat-stuffing treatment, the weight ratio of water consumption to oxide slag is 0.7:1, keep The pressure inside the container is 1MPa, and the stuffiness time is 30h;

[0040] (2) Sieve the oxidized slag after heat-stuffing treatment in step (1) with a 200mm sieve, smash and magnetically separate the sieve > 200mm, and the magnetic separation intensity is 5000Gs to obtain a class of steel slag and tailings;

[0041] (3) continue to repeat the operation in step (2) for the tailings in step (2), then carry out magnetic separation to the sieve <200mm, the magnetic separation intensity is 4000Gs, and obtain the second class steel slag and tailings,

[0042] (4) Screening the tailings in step (2) with a 50mm sieve, crushing the tailings > 50m...

Embodiment 3

[0045] A treatment method for electric furnace oxidized slag, comprising the following steps:

[0046] (1) Put the oxidized slag at a temperature of 950°C into a container and seal it, and then spray water mist evenly on the oxidized slag for heat-stuffing treatment. The weight ratio of water consumption to oxidized slag is 0.6:1. The pressure inside the container is 0.7MPa, and the stuffiness time is 20h;

[0047] (2) Sieve the oxidized slag after heat-stuffing treatment in step (1) with a 200mm sieve, smash and magnetically separate the sieve > 200mm, and obtain a class of steel slag and tailings;

[0048](3) Continue to repeat the operation in step (2) for the tailings in step (2), then carry out magnetic separation to the sieve <200mm, and the magnetic separation intensity is 4000Gs to obtain the second-class steel slag and tailings,

[0049] (4) Screening the tailings in step (2) with a 50mm sieve, crushing the tailings > 50mm and then magnetically separating them with ...

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Abstract

The invention discloses an electric furnace oxidizing slag treatment method. The electric furnace oxidizing slag treatment method comprises the following steps that high-temperature oxidizing slag issealed, water mist is sprayed to the oxidizing slag for high-pressure hot disintegration treatment, and the pressure in a container in the hot disintegration process is 0.3-1 MPa; screening is carriedout on the oxidizing slag subjected to hot disintegration treatment by using a 200 mm screen, and smashing and magnetical-separating are carried out on the screened material with the particle size ofmore than 200 mm to obtain first-class steel slag and tailings; repeated smashing and screening are carried out on the tailings; and magnetical-separating is carried out on screened objects with theparticle size of more than 200 mm to obtain second-class steel slag and tailings, screening is carried out on the tailings by adopting a 50mm screen, the tailings which are more than 50mm are crushed,then magnetic separation is carried out to obtain third-class steel slag, screening is carried out on the residual tailings by adopting a 10mm screen, magnetic separation is carried out on the tailings which are less than 10mm to obtain fourth-class steel slag and electric furnace slag powder, and magnetic separation is carried out on the tailings which are 10mm-50mm to obtain fifth-class steel slag and electric furnace tailings. According to the method, the problem of resource waste of an existing processing method can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of oxidation slag treatment, in particular to a treatment method for electric furnace oxidation slag. Background technique [0002] In recent years, my country's crude steel production has grown rapidly, and the discharge of metallurgical waste residues has also increased. According to the data released by the Information and Statistics Department of the China Iron and Steel Industry Association, in 2011, China's crude steel output was 683 million tons, of which 68 million tons were electric furnace steel, and the total amount of electric furnace oxide slag reached more than 4 million tons (the unit slag production was calculated as 60kg / t steel calculation). It can be seen that the effective comprehensive utilization of such a large amount of metallurgical waste has become an effective way for enterprises to develop circular economy, implement energy conservation and emission reduction, reduce costs and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06C21B3/08
CPCC21B3/06C21B3/08C21B2400/024C21B2400/02Y02W30/50
Inventor 范泽宇钱强杨金裕张入元宋文德
Owner PANZHIHUA GANGCHENG GROUP
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