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Method for preparing foamed ceramic material by rolling blast furnace hot slag

A technology of hot slag and foamed ceramics, which is applied in the production of ceramic materials, ceramic products, applications, etc., can solve the problems of inconvenient use of hot slag in blast furnaces, reduce repeated energy consumption, save raw material costs, and improve Effects of Environmental Benefits and Circular Economic Benefits

Inactive Publication Date: 2021-08-10
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problem that the existing blast furnace hot slag is inconvenient to use, the present invention provides a method for preparing foamed ceramic materials by rolling the blast furnace hot slag

Method used

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  • Method for preparing foamed ceramic material by rolling blast furnace hot slag

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Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, this embodiment provides a method for preparing a foamed ceramic material using blast furnace hot slag, which specifically includes the following steps:

[0040] S1. Preheat the conditioner to 1250° C. through the conditioner preheating device 3 . Among them, the conditioner is iron tailings, and the SiO in the iron tailings 2 The mass percentage of MgO is 60%, and the mass percentage of MgO is 6%. The conditioning agent preheating device 3 can be realized by using any existing preheating device and preheating method, or can also directly use blast furnace hot slag to preheat the conditioning agent, which will not be repeated here.

[0041] Since the hot blast furnace slag is the molten slag discharged directly from the blast furnace 1 when the conditioner is mixed with the blast furnace hot slag in the subsequent step, the temperature is generally 1450-1550° C., which is relatively high. If the conditioning agent is directly mixed with the...

Embodiment 2

[0058] S1. Preheat the conditioner to 1300° C. through the conditioner preheating device 3 . Among them, the conditioner is iron tailings, and the SiO in the iron tailings 2 The mass percent of MgO is 55%, and the mass percent of MgO is 6%. The conditioning agent preheating device 3 can be realized by using any existing preheating device and preheating method, or can also directly use blast furnace hot slag to preheat the conditioning agent, which will not be repeated here.

[0059] S2. The blast furnace hot slag with a temperature of 1500°C, which is directly discharged from the blast furnace 1 after the separation of slag and iron, is transported into the conditioning and homogenizing device 4 together with the preheated conditioner obtained in step S1 as the main raw material. Among them, in the present embodiment, the mass ratio of the blast furnace hot slag and the conditioning agent passed into the tempering homogenization device 4 is 4:6, and an inert gas (such as N 2...

Embodiment 3

[0068] S1. Preheat the conditioner to 1400° C. through the conditioner preheating device 3 . Among them, the conditioner is iron tailings, and the SiO in the iron tailings 2 The mass percentage of MgO is 50%, and the mass percentage of MgO is 6%. The conditioner preheating device 3 can be realized by using any existing preheating device and preheating method, or can also directly use blast furnace hot slag to preheat the conditioner.

[0069] S2. The blast furnace hot slag with a temperature of 1550°C, which is directly discharged from the blast furnace 1 after the separation of slag and iron, is transported into the tempering and homogenizing device 4 together with the preheated conditioner obtained in step S1 as the main raw material. Among them, in the present embodiment, the mass ratio of the blast furnace hot slag and the conditioning agent passed into the tempering homogenization device 4 is 6:4, and an inert gas (such as N2, Ar, etc.) is passed into at the same time, a...

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Abstract

The invention discloses a method for preparing a foamed ceramic material by rolling blast furnace hot slag, and belongs to the related technical field of preparation of foamed ceramics from blast furnace slag. The method comprises the following steps: S1, preheating a hardening and tempering agent; S2, conveying the blast furnace hot slag and the preheated hardening and tempering agent into a hardening and tempering homogenizing device together, uniformly mixing, and preserving heat; S3, conveying the quenched and tempered slag into a heat preservation bin, meanwhile, conveying a preheated foaming agent to the two sides of a rolling device through a foaming agent conveying device, and uniformly mixing the foaming agent and the quenched and tempered slag through the rolling process; S4, conveying the foamed ceramic ingredients into a foaming conveying device, and obtaining the foamed ceramic material; and S5, cutting the formed continuous plate-shaped foamed ceramic material to obtain the building raw material. The sensible heat of the blast furnace hot slag can be directly utilized, the energy consumption for preparing the foamed ceramic material can be reduced, the plate-shaped foamed ceramic is directly generated, and the organic unification of energy conservation and consumption reduction in the preparation process of the foamed ceramic and the recycling of the sensible heat of the blast furnace hot slag is realized.

Description

technical field [0001] The invention belongs to the relevant technical field of preparing foamed ceramics from blast furnace slag, and more specifically relates to a method for preparing foamed ceramic materials by rolling hot blast furnace slag. Background technique [0002] A large amount of high-temperature slag is produced in the process of blast furnace ironmaking, and about 0.3-0.4 tons of slag is produced for every 1 ton of pig iron smelted. 4 The sensible heat of kJ is equivalent to the energy of 60kg standard coal, which is a high-quality waste heat resource and has a high recovery value. However, due to technical reasons, most of this part of heat has not been recycled. At the same time, blast furnace slag is a silicate material with good performance, which can be used as a raw material for the production of building materials and chemical fertilizers. The quenched blast furnace slag has potential hydraulic gelling properties and is an excellent cement raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B33/138C04B33/132C04B5/06
CPCC04B5/06C04B5/065C04B33/1328C04B33/138C04B38/02C04B2235/3418Y02P40/60
Inventor 张璐包向军陈光陈琰炜徐朝成
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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