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Method for preparing foam glass by virtue of high-temperature liquid-state metallurgical clinker

A foam glass and slag technology, applied in the field of metal material processing, to achieve the effects of environmental friendliness, low energy consumption, and reduced production costs

Active Publication Date: 2015-09-09
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at various problems existing in the prior art, the present invention provides a method for preparing foam glass using high-temperature liquid metallurgical slag, which can effectively solve the problem of environmental pollution caused by a large amount of metallurgical slag piled up, and can also make full use of industrial waste heat to reduce Production cost of foam glass

Method used

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  • Method for preparing foam glass by virtue of high-temperature liquid-state metallurgical clinker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Put the blast furnace slag discharged from the metallurgical smelting furnace at a temperature of 1450°C directly into the homogeneous foaming furnace, add additives, and fully stir and foam under the waste heat of the slag at a stirring speed of 5 r / min , the stirring time is 0.4h, and the mixed foam of molten slag is obtained;

[0025] (2) Put the mixed foam of molten slag into the mold, use an annealing furnace with a cooling intensity of 20°C / min, lower the temperature to 600°C, and then anneal at a cooling rate of 1°C / min to obtain the slag Sintered body;

[0026] (3) Demould the sintered body of the molten slag, cut to obtain block material and leftover material, and the block material is foam glass.

[0027] The homogeneous foaming furnace is a pond kiln.

[0028] The additive is a cold auxiliary additive obtained by mixing the coolant, the conditioning agent, the cosolvent and the foaming agent evenly, wherein the coolant is a mixture of 10% scrap and 90% ...

Embodiment 2

[0032] (1) Put the silicon-manganese slag discharged from the metallurgical smelting furnace at a temperature of 1200°C directly into the homogeneous foaming furnace, add additives, and fully stir and foam under the waste heat of the slag at a stirring speed of 10 r / min, the stirring time is 0.2h, and the mixed foam of molten slag is obtained;

[0033] (2) Put the mixed foam of molten slag into the mold, use the annealing furnace, the cooling intensity is 30°C / min, reduce the temperature to 500°C, and then anneal at a cooling rate of 1.5°C / min to obtain the slag Sintered body;

[0034] (3) Demould the sintered body of the molten slag, cut to obtain block material and leftover material, and the block material is foam glass.

[0035] The homogeneous foaming furnace is an electric arc furnace.

[0036] The additive is a cold-state auxiliary additive obtained after uniformly mixing coolant, conditioner, cosolvent, and foaming agent, wherein the coolant is a mixture of 20% scrap...

Embodiment 3

[0040] (1) Put the high-temperature liquid nickel slag discharged from the metallurgical smelting furnace at a temperature of 1500°C directly into the homogeneous foaming furnace, add additives, and fully stir and foam under the residual heat of the slag at a stirring speed of 1 r / min, the stirring time is 0.8h, and the mixed foam of molten slag is obtained;

[0041] (2) Put the mixed foam of molten slag into the mold, use an annealing furnace with a cooling intensity of 40°C / min, lower the temperature to 700°C, and then anneal at a cooling rate of 2°C / min to obtain the slag Sintered body;

[0042] (3) Demould the sintered body of the molten slag, cut to obtain block material and leftover material, and the block material is foam glass.

[0043] The homogeneous foaming furnace is an induction furnace.

[0044] The additive is a cold-state auxiliary additive obtained after the coolant, the conditioning agent, the cosolvent, and the foaming agent are uniformly mixed, wherein t...

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Abstract

The invention provides a method for preparing foam glass by virtue of high-temperature liquid-state metallurgical clinker. The method comprises the steps of with the high-temperature liquid-state metallurgical clinker discharged from a metallurgical smelting furnace as a direct raw material, carrying out foaming on the high-temperature liquid-state metallurgical clinker and an additive by virtue of waste heat of the clinker, and carrying out processes of annealing, demolding and cutting, so as to prepare the foam glass. According to the preparation method, the industrially discarded high-temperature liquid-state metallurgical clinker is directly used as the raw material, the sensible heat of the clinker is adequately utilized, the energy consumption of the whole production process is low, and secondary pollutants are not generated, so that the industrial feasibility is relatively high. Besides, the volume density of the prepared foam glass is 518.6kg.m<-3>-597.4kg.m<-3>, the average pore size is 3.75mm-4.84mm, the compressive strength is 9.4MPa-15.8MPa, and thus the foam glass is superior to common clinker foam glass at present.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a method for preparing foam glass by using high-temperature liquid metallurgical slag. Background technique [0002] Metallurgical slag is a huge waste of metallurgical enterprises, and its main components are CaO, SiO 2 、Al 2 o 3 Wait. At present, the annual discharge is more than 700 million tons, most of which are directly discharged into the river or piled up without any treatment, which seriously pollutes the environment. Therefore, the development and utilization of discarded metallurgical slag, turning waste into treasure is very important for the construction of "Beautiful China" "Very important. At present, the utilization of metallurgical slag is mainly in the field of construction cement, such as the use of silico-manganese slag to produce cement clinker (CN201310697437.0); the use of silico-manganese slag to prepare cement concrete ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C11/00C04B5/06
Inventor 战东平范坤郑瑶邱国兴张洋鹏牛奔张慧书邓比涛唐磊王伟名杨永坤姜周华
Owner NORTHEASTERN UNIV
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