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Method for producing mineral wool by using early-stage molten-state steel slag of converter

A molten state, converter technology, used in glass manufacturing equipment, manufacturing tools, etc., can solve the problem of inability to solve the problem of steel slag recycling, unsuitable steel slag, and no metal resource recovery, so as to maintain a virtuous cycle, reduce production costs, Achieving the effect of high value-added utilization

Active Publication Date: 2016-10-26
ANHUI UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above-mentioned applications are all good solutions for producing mineral wool by using molten steel slag, but the above-mentioned applications focus more on the blast furnace slag with a higher degree of resource utilization, and the molten blast furnace slag Sensible heat resource utilization is not applicable to the current containing (Fe n O) Refractory steel slag up to 15% to 30%
Due to the limitation of the composition of blast furnace slag, it is necessary to add an additional electric heating device to supplement the heat in the process of quenching and tempering the slag in the above application, and the above application does not propose a specific method for the recovery of metal resources in the steel slag component , can not solve the resource problem of steel slag, realize the high value-added utilization of steel slag

Method used

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  • Method for producing mineral wool by using early-stage molten-state steel slag of converter

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Embodiment 1

[0052] In this embodiment "a method of producing mineral wool by using molten steel slag in the early stage of converter", the raw material composition mass percentage is: 80% molten steel slag in the early stage of converter, 15% reducing agent, and 5% modifying agent. The molten steel slag in the early stage of the converter includes the following components in mass percentage: CaO 37%, SiO 2 29%, FeO 25%, MgO 4%, Al 2 o 3 3%. The reducing agent is a mixture of ferrosilicon and aluminum particles with a particle size of 10-30mm. The modifying agent is broken glass with a particle size of 5-20 mm.

[0053] combine figure 1 , the steps of present embodiment producing mineral wool are:

[0054] (1) At a temperature of about 1400°C, pour the slag of the converter double slag retention method with a slag basicity of 1.3 into the melting furnace. Each converter is equipped with 3 melting furnaces, and a reducing agent is added during the process of placing the steel slag in...

Embodiment 2

[0059] In this embodiment "a method of producing mineral wool by using molten steel slag in the early stage of the converter", the raw material composition mass percentage is: 80% molten steel slag in the early stage of the converter, 10% reducing agent, 10% modifier, and molten steel slag in the early stage of the converter. Steel slag includes the following components in mass percentage: CaO 45%, SiO 2 25%, FeO 20%, MgO 5%, Al 2 o 3 2.5%. The reducing agent is ferrosilicon, with a particle size of 10-30mm. The modifying agent is clay with a particle size of 5-20mm.

[0060] combine figure 1 , the steps of present embodiment producing mineral wool are:

[0061] (1) At a temperature of about 1420°C, pour the slag of the converter double slag retention method with a slag basicity of 1.8 into the melting furnace. Each converter is equipped with 4 melting furnaces. The melting furnace is an improved slag tank, and the shell is Steel plate, the inner wall is refractory ins...

Embodiment 3

[0066] In this embodiment "a method of producing mineral wool by using molten steel slag in the early stage of the converter", the raw material composition mass percentage is: 85% molten steel slag in the early stage of the converter, 9% reducing agent, and 6% modifier, and the molten steel slag in the early stage of the converter is Steel slag includes the following components in mass percentage: CaO 41%, SiO 2 29%, FeO 18%, MgO 6%, Al 2 o 3 3%. The reducing agent is aluminum particles with a particle size of 10-30mm. The modifier is fly ash with a particle size of 5-20mm.

[0067] combine figure 1 , the steps of present embodiment producing mineral wool are:

[0068] (1) At a temperature of about 1450°C, pour the slag of the converter double slag retention method with a slag basicity of 1.4 into the melting furnace. Each converter is equipped with 5 melting furnaces, and a reducing agent is added during the process of placing the steel slag in the melting furnace Red...

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Abstract

The invention discloses a method for producing mineral wool by using early-stage molten-state steel slag of a converter, and belongs to the technical field of production of mineral wool. The method comprises the following steps: pouring the early-stage molten-stage steel slag of the converter in a smelting furnace, adding a reducing agent and a modifier in a pouring process, and carrying out reducing and modifying; and after stirring, mixing evenly and standing for 0.5-1.5 hours, feeding slag at the temperature between 1,380 DEG C and 1,430 DEG C to wool producing equipment and processing into the mineral wool. Double advantages of 'residues' and 'heat' of the molten-state steel slag are played fully, ferrosilicon and aluminum granules are used as reducing agents, reaction of silicon, aluminum and iron oxide is silicothermal reaction and aluminothermal reaction, a large amount of thermal can be produced along with the reaction, and heat supply in a whole reducing and modifying process can be satisfied. After valuable elements are recycled, residues are directly prepared into the mineral wool with high additional value, the molten-state steel slag is comprehensively recycled, the problem of emission of the steel slag is solved, furthermore, the production cost of the mineral wool can be reduced, and the economic benefit and the environment benefit are good.

Description

technical field [0001] The invention relates to the technical field of mineral wool production, and more specifically relates to a method for producing mineral wool by using molten steel slag in the early stage of a converter. Background technique [0002] The sustainable development of the steel industry needs to break through the bottleneck of resource utilization constraints. As an energy-carrying resource, steel slag is both urgent and necessary regardless of its energy utilization, resource utilization, or as an inorganic non-metallic new material. The poured molten steel slag from converter smelting is rich in high-temperature heat resources, metal resources and CaO, MgO, SiO 2 、Al 2 o 3 and other useful ingredients. Experiments show that the enthalpy of steel slag at 1600°C is 2000KJ / kg, and water quenching of 1 ton of liquid slag can release 1600-1800MJ / ton of slag, which is equivalent to the heat of 55-61kg of standard coal. [0003] At present, except for a sma...

Claims

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Application Information

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IPC IPC(8): C03B37/00C03C13/06
CPCC03B37/00C03C13/06
Inventor 范鼎东沈乾坤邓爱军
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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