阅读说明：本技术 矿渣棉的制备方法和矿渣棉的制备装置 (Preparation method and preparation device of mineral wool ) 是由 王玮 陈耿涛 肖辉 汪飞虎 刘井辉 刘涛 李云峰 于 2019-05-07 设计创作，主要内容包括：本发明公开了一种矿渣棉的制备方法和矿渣棉的制备装置,矿渣棉的制备方法包括：将含铁物料加入炼铁炉中进行还原反应；将所述炼铁炉的炉渣溢流至电热前床并在所述电热前床中进行调制；将调制后的炉渣加入电炉内进行保温；将从所述电炉排出的炉渣加入到离心成纤机中进行矿渣棉的制备。根据本发明的矿渣棉的制备方法,将炼铁炉产出的炉渣资源化利用,采用短工艺流程,充分利用炉渣显热,实现矿渣棉的连续性生产,节能环保,经济效益显著。(The invention discloses a preparation method and a preparation device of mineral wool, wherein the preparation method of the mineral wool comprises the following steps: adding the iron-containing material into an iron-making furnace for reduction reaction; overflowing slag of the ironmaking furnace to an electric heating forebed and conditioning in the electric heating forebed; adding the prepared slag into an electric furnace for heat preservation; and adding the slag discharged from the electric furnace into a centrifugal fiberizer to prepare the mineral wool. According to the preparation method of the mineral wool, the slag produced by the iron-making furnace is recycled, the sensible heat of the slag is fully utilized by adopting a short process flow, the continuous production of the mineral wool is realized, the energy is saved, the environment is protected, and the economic benefit is obvious.)

1. A method for preparing mineral wool, which is characterized by comprising the following steps:

adding the iron-containing material into an iron-making furnace for reduction reaction;

adding slag of the ironmaking furnace into an electric heating forebed and modulating the slag in the electric heating forebed;

adding the prepared slag into an electric furnace for heat preservation;

and adding the slag discharged from the electric furnace into a centrifugal fiberizer to prepare the mineral wool.

2. The method of claim 1, wherein the electro-thermal front bed uses heating electrodes and/or injected pulverized coal to heat the slag.

3. The method of claim 1, wherein the additive is injected into the slag in the electric heating fore-bed by using an injection mixing device, and the acidity coefficient of the slag after modulation is 1.1-1.5.

4. A process for the production of slag wool according to claim 3 wherein an inert gas is bubbled through the electrothermal forehearth.

5. A process for the production of slag wool according to claim 4 wherein an inert gas is bubbled into the electrically heated forehearth after preheating to 600-800 ℃.

6. The process for the production of mineral wool according to claim 1 wherein the electric furnace maintains slag at a temperature in the range of 1400 ℃ to 1500 ℃.

7. The method of producing slag wool according to any one of claims 1 to 6, wherein slag in the ironmaking furnace flows into the electrically heated forehearth by overflow.

8. The process for the production of slag wool according to any one of claims 1 to 6, wherein the iron-containing material is copper, lead, zinc, nickel mill tailings.

9. A slag wool making apparatus, comprising:

an iron making furnace having a tap hole and a slag communicating hole;

the electric heating forebed is communicated with the slag discharge communication port and is provided with a slag discharge port;

the electric furnace is communicated with the slag hole;

and the centrifugal fiberizer is connected with the electric furnace.

10. The apparatus for producing slag wool according to claim 9, wherein the electric heating forehearth is provided with a heating electrode port and/or a pulverized coal injection port.

11. The apparatus for producing slag wool according to claim 9, further comprising:

and the blowing and mixing device is communicated with the blowing and stirring port of the electric heating forehearth.

12. The apparatus for producing slag wool according to claim 9, wherein the cupola is spaced apart from the electrically heated forehearth by a furnace wall.

13. The apparatus according to claim 9, wherein the electric heating forehearth is connected to the electric furnace and the electric furnace is connected to the centrifugal fiberizer through chutes respectively.

Technical Field

The invention relates to the technical field of slag utilization, in particular to a preparation method of mineral wool and a preparation device of the mineral wool.

Background

The harmless and resource utilization of the smelting waste slag is the focus of great attention in China and even the world, and is one of the central contents for promoting the circular economy. The smelting tailings of copper, lead, zinc and nickel plants contain rich valuable metal elements such as iron, zinc, lead, nickel and the like, the valuable elements can be recovered by using the novel iron smelting furnace, and the produced slag is used as a building material after water quenching treatment. In order to maximize the added value of slag products, the slag is prepared into slag wool by using a cupola furnace in the related technology, so that although the process is continuous, the sensible heat of the slag cannot be effectively utilized, the energy consumption is high, the slag wool is produced after the thermal-state slag is transported to an electric furnace by using a slag ladle or a slag tanker, the safety and environmental protection risks exist, the utilization rate of the sensible heat of the slag is low, and the economic benefit is poor.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a preparation method of the mineral wool, which can effectively utilize sensible heat of the slag and realize continuous production and can reduce the processing cost of the mineral wool to the maximum extent.

The invention also provides a device for preparing the mineral wool.

A method of producing slag wool in accordance with an embodiment of the first aspect of the invention comprises: adding the iron-containing material into an iron-making furnace for reduction reaction; adding slag of the ironmaking furnace into an electric heating forebed and modulating the slag in the electric heating forebed; adding the prepared slag into an electric furnace for heat preservation; and adding the slag discharged from the electric furnace into a centrifugal fiberizer to prepare the mineral wool.

According to the preparation method of the mineral wool provided by the embodiment of the invention, the slag produced by the iron-making furnace is recycled, a short process flow is adopted, the sensible heat of the slag is fully utilized, the continuous production of the mineral wool is realized, the energy is saved, the environment is protected, and the economic benefit is obvious.

In addition, the preparation method of the slag wool according to the embodiment of the invention also has the following additional technical characteristics:

according to some embodiments of the invention, the electric heating forebed heats the slag using heating electrodes and/or blowing pulverized coal.

According to some embodiments of the invention, the additive is injected into the slag in the electric heating front bed by using an injection mixing device, and the acidity coefficient of the slag after modulation is 1.1-1.5.

Further, an inert gas is bubbled into the electric heating fore-bed.

Optionally, an inert gas is preheated to 600 ℃ to 800 ℃ and then blown into the electric heating forebed.

According to some embodiments of the invention, the electric furnace maintains slag in a range of 1400 ℃ to 1500 ℃.

According to some embodiments of the invention, slag in the ironmaking furnace flows into the electric heating front bed by overflow.

According to some embodiments of the invention, the iron-bearing material is copper, lead, zinc, nickel mill tailings.

According to a second aspect of the invention, an apparatus for producing mineral wool comprises: an iron making furnace having a tap hole and a slag communicating hole; the electric heating forebed is communicated with the slag discharge communication port and is provided with a slag discharge port; the electric furnace is communicated with the slag hole; and the centrifugal fiberizer is connected with the electric furnace.

According to the device for preparing the mineral wool, provided by the embodiment of the invention, the slag produced by the iron-making furnace is recycled, a short process flow is adopted, the sensible heat of the slag is fully utilized, the continuous production of the mineral wool is realized, the energy is saved, the environment is protected, and the economic benefit is obvious.

According to some embodiments of the invention, the electric heating front bed is provided with a heating electrode port and/or a pulverized coal injection port.

According to some embodiments of the invention, the apparatus for producing slag wool further comprises: and the blowing and mixing device is communicated with the blowing and stirring port of the electric heating forehearth.

According to some embodiments of the invention, the ironmaking furnace is spaced from the electrically heated forehearth by a furnace wall.

According to some embodiments of the invention, the electric heating forebed and the electric furnace and the centrifugal fiberizer are connected by a chute respectively.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a flow chart of a method of producing slag wool in accordance with an embodiment of the invention;

FIG. 2 is a schematic structural view of an apparatus for producing slag wool according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a slag wool manufacturing apparatus according to an embodiment of the present invention.

Reference numerals:

a slag wool preparation device 1, an iron-making furnace 10, an electric heating forehearth 20, a first chute 30, an electric furnace 40, a second chute 50, a centrifugal fiber forming machine 60,

The slag tapping device comprises a tapping hole 101, a slag tapping communicating hole 102, an injection stirring hole 201, a heating electrode 202, a pulverized coal injection hole 203, a slag tapping 204 and a heat preservation electrode 401.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A method of producing slag wool according to an embodiment of the first aspect of the invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, a method for preparing slag wool according to an embodiment of the present invention includes:

adding the iron-containing materials into the iron-making furnace 10 for reduction reaction, namely adding the iron-containing materials into the iron-making furnace 10 according to the requirements of the materials entering the furnace for reduction smelting reaction, settling and separating the produced molten iron and slag in a furnace hearth, discharging the molten iron at the bottom layer through an iron outlet 101, and heating and modulating the slag at the upper layer into an electric heating fore-bed 20 through a slag communicating hole 102. Wherein, the iron-containing material can be smelting tailings of copper, lead, zinc and nickel plants, the smelting process can recover iron and utilize slag to produce slag wool, the added value of products is improved, and the aim of changing waste into valuable is fulfilled.

The slag of the ironmaking furnace 10 is added into the electric heating forehearth 20 and is modulated in the electric heating forehearth 20, namely, the electric heating forehearth 20 stirs and modulates the slag to meet the requirement of producing mineral wool.

The prepared slag is added into an electric furnace 40 for heat preservation, the electric heating fore bed 20 and the electric furnace 40 can be connected through a chute, the prepared slag is added into the electric furnace 40 through the chute and then uniformly enters a centrifugal fiber forming machine 60 through a slag outlet of the electric furnace 40, and the purpose of continuous production is achieved.

And adding the slag discharged from the electric furnace 40 into a centrifugal fiber forming machine 60 to prepare the mineral wool, allowing the high-temperature slag to enter the centrifugal fiber forming machine 60, dispersedly throwing the high-temperature slag out through the high-speed operation of the centrifugal fiber forming machine 60, and quickly cooling to form the mineral wool.

Since the slag discharged from the iron making furnace 10 is directly introduced into the electric heating fore bed 20 to be heated without being subjected to a cooling process, the residual heat of the slag can be directly utilized.

According to the preparation method of the mineral wool provided by the embodiment of the invention, the slag produced by the iron-making furnace 10 is recycled, a short process flow is adopted, the sensible heat of the slag is fully utilized, the continuous production of the mineral wool is realized, the energy is saved, the environment is protected, and the economic benefit is obvious.

According to some embodiments of the present invention, as shown in FIGS. 2 and 3, the electric heating forebed 20 heats slag using heating electrodes 202 and/or blowing pulverized coal. Here, the electric heating fore-bed 20 may heat the slag only by the heating electrode 202 or the injected pulverized coal, and the electric heating fore-bed 20 may heat the slag by both the heating electrode 202 and the injected pulverized coal. For example, the pulverized coal injection port 203 is arranged above the slag line of the side wall of the electric heating forehearth 20, and can extend into the pulverized coal injection pipe from the side wall to directly inject pulverized coal into a slag layer, so that the fuel utilization rate is improved, and the energy consumption is reduced.

According to some embodiments of the invention, the additive is injected into the slag in the electric heat front bed 20 using an injection mixing device, and the modulated slag acidity factor is 1.1-1.5. For example, the temperature of the slag in the electric heating fore-bed 20 is brought to 1400 ℃ to 1500 ℃, and the added additives are sufficiently melted.

Further, inert gas can be blown into the electric heating fore-bed 20, so that the slag is stirred while the additive is sprayed, the additive is uniformly dispersed in the slag, and the modulation effect is improved.

Alternatively, the inert gas may be preheated to 600-800 ℃ and then blown into the electric heating fore-bed 20, thereby avoiding rapid cooling of the slag.

According to some embodiments of the invention, the electric furnace 40 preserves the slag in the range of 1400 ℃ to 1500 ℃, and the electric furnace 40 stores and preserves the homogeneous slag for the purpose of continuous production.

According to some embodiments of the present invention, the slag in the ironmaking furnace 10 flows into the electric heating fore-bed 20 through overflow, so that continuous production can be realized, the flow is shortened, energy is saved, and consumption is reduced.

The apparatus 1 for producing slag wool according to the embodiment of the second aspect of the present invention comprises: an iron making furnace 10, an electric heating forehearth 20, an electric furnace 40 and a centrifugal fiberizer 60.

Specifically, the iron making furnace 10 has a tap hole 101 and a slag communication hole 102, and the tap hole 101 is located below the slag communication hole 102, for example. The iron-containing materials are added into an iron-making furnace 10 according to the requirements of the materials entering the furnace for reduction smelting reaction, the produced molten iron and slag are settled and separated in a furnace hearth, the molten iron at the bottom layer is discharged through a tap hole 101, and the slag at the upper layer enters an electric heating fore-bed 20 through a slag discharge communication hole 102 for heating and modulation.

The electric heating forehearth 20 is communicated with the slag discharge communication port 102, the electric heating forehearth 20 is provided with a slag discharge port 204, and the electric heating forehearth 20 stirs and modulates the slag to meet the requirement of producing mineral wool.

The electric furnace 40 is communicated with the slag hole 204, the electric heating fore bed 20 and the electric furnace 40 can be connected through a chute, the prepared slag is added into the electric furnace 40 through the chute, and then evenly enters the centrifugal fiber forming machine 60 through the slag hole of the electric furnace 40, so as to achieve the purpose of continuous production.

The centrifugal fiberizer 60 and the electric furnace 40 may be connected by a chute. For example, centrifugal fiberizer 60 consists of a high speed four roll centrifuge and a cotton collection system comprising a fiberizing centrifugal fan and an induced draft fan. The high-temperature furnace slag enters a centrifugal fiberizer 60, is dispersedly thrown out through the high-speed operation of the centrifugal fiberizer 60, and is rapidly cooled to form mineral wool.

According to the slag wool preparation device 1 provided by the embodiment of the invention, the slag produced by the iron-making furnace 10 is recycled, a short process flow is adopted, the sensible heat of the slag is fully utilized, the continuous production of the slag wool is realized, the energy is saved, the environment is protected, and the economic benefit is obvious.

According to some embodiments of the invention, as shown in FIG. 2, the electrocaloric front bed 20 is provided with heater electrodes 202 and/or pulverized coal injection ports 203. Here, the electric heating fore-bed 20 may heat the slag only by the heating electrode 202 or the injected pulverized coal, and the electric heating fore-bed 20 may heat the slag by both the heating electrode 202 and the injected pulverized coal. For example, the pulverized coal injection port 203 is arranged above the slag line of the side wall of the electric heating forehearth 20, and can extend into the pulverized coal injection pipe from the side wall to directly inject pulverized coal into a slag layer, so that the fuel utilization rate is improved, and the energy consumption is reduced.

According to some embodiments of the invention, the apparatus 1 for the preparation of mineral wool further comprises: and the blowing and mixing device is communicated with the blowing and stirring port 201 of the electric heating forehearth 20. For example, the injection stirring port 201 is located at the top of the electric heating fore-bed 20, and the additive can be injected into the slag by the high-temperature injection mixing device, so that the acidity coefficient of the prepared high-temperature slag is 1.1-1.5.

According to some embodiments of the present invention, as shown in FIG. 2, the iron making furnace 10 is spaced from the electrically heated forehearth 20 by furnace walls. Thus, the high-temperature slag overflows to the electric heating front bed 20 through the slag discharge communication port 102, thereby realizing continuous production, shortening the flow, saving energy and reducing consumption.

The apparatus 1 for producing slag wool according to one embodiment of the present invention is described in detail below.

The iron-containing materials are added into the iron-making furnace 10 according to the requirement of ingredients for reduction reaction, the produced molten iron and slag are settled and separated in the furnace hearth, the molten iron at the bottom layer is discharged through the tap hole 101, and the slag at the upper layer enters the electric heating fore-bed 20 through the slag discharge communication hole 102.

The electric heating fore bed 20 heats up the slag by using the heating electrode 202 and the blowing pulverized coal, so that the temperature of the melt reaches 1400-1500 ℃. The top of the electric heating fore-bed 20 is provided with a blowing stirring port 201, and additives are blown into the slag through a high-temperature blowing mixing device, so that the acidity coefficient of the modulated high-temperature slag is 1.1-1.5. Meanwhile, inert gas at 600-800 ℃ is blown into the electric heating fore-bed 20 to stir the slag, so that the additive is uniformly dispersed in the slag, and the modulation effect is improved.

The prepared slag is added into an electric furnace 40 through a first chute 30, a heat-preservation electrode 401 is arranged in the electric furnace 40 to preserve heat at 1400-1500 ℃, and a slag outlet of the electric furnace 40 is connected with a centrifugal fiber forming machine 60 through a second chute 50, so that the continuous production of the mineral wool is realized.

Therefore, the slag produced by the iron making furnace 10 enters the electric heating fore-bed 20 through the slag discharge communication port 102 and is connected with subsequent equipment through the first chute 30, the sensible heat of the slag is utilized to the maximum extent, the personnel allocation is reduced, and the continuous production is realized;

the additive is sprayed into the slag through the high-temperature spraying and mixing device, so that the additive and the slag can be fully mixed, and the aim of homogenization is fulfilled; but also has the function of stirring, is beneficial to heat and mass transfer in the furnace and reduces energy consumption.

According to the preparation device 1 of the mineral wool provided by the embodiment of the invention, iron can be recycled, and the slag can be used for producing the mineral wool, so that the added value of products is increased, and the aim of changing waste into valuable is fulfilled; meanwhile, the operation flow is reduced, continuous operation is realized, and the sensible heat of the slag is fully utilized.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, "a first feature" or "a second feature" may include one or more of the features, and the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. The first feature being "on," "over" and "above" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "a specific embodiment," "an example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.