CN111217548A

CN111217548A - Novel high-molecular silicon-aluminum polymeric material and preparation method thereof

Info

Publication number: CN111217548A
Application number: CN201811413326.1A
Authority: CN
Inventors: 崔师斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2020-06-02

Abstract

The invention provides a new polymer silicon-aluminum polymerization material and a preparation method thereof. The novel polymer silicon-aluminum polymerization material comprises, by weight, 30-50 parts of red mud and 30-60 parts of coal gangue. The red mud and the coal gangue are used as raw materials, so that the red mud and the coal gangue can be reasonably utilized, waste is turned into wealth, the economic utilization efficiency of the red mud and the coal gangue can be improved, and the environment is improved. Meanwhile, the red mud and the coal gangue have lower thermal conductivity, so that the prepared new polymer silicon-aluminum polymeric material has better heat preservation property. The new material is used as a main auxiliary material for filling heat-insulating materials and producing rock wool, and the new material is used as a filler to replace natural stones such as basalt, dolomite and the like so as to achieve the purpose of protecting the environment.

Description

Novel high-molecular silicon-aluminum polymeric material and preparation method thereof

Technical Field

The invention relates to the technical field of inorganic materials, in particular to a novel polymer silicon-aluminum polymerization material and a preparation method thereof.

Background

The coal gangue is a mixture of carbon, argillaceous and sandy shale, has a low calorific value, contains 20-30% of carbon and some humic acid. China stores about 1000Mt of coal gangue over the years, and continues to discharge about 100Mt every year, not only accumulating land, but also spontaneously combusting to pollute air or cause fire. The inorganic components of the coal gangue are mainly oxides of silicon, aluminum, calcium, magnesium, iron and some rare metals.

The red mud is residue produced after alumina is extracted from bauxite by Bayer process. The residues are red brown due to rich iron oxide, are called red mud slag and belong to harmful solid wastes, the red mud occupies thousands of acres in China at present, and in addition, the pollution of the red mud to the surrounding environment causes no land around the sludge to be cultivated and the groundwater cannot be drunk. The red mud has a melting point of 1200-1250 ℃, a pH value of 10-12, a particle size of 0.08-0.25 μm, a relative density of 2.7-2.9, and an apparent relative density of 0.8-1.0. The chemical components of the method are slightly different with the difference of the production process for extracting the alumina, and the main mineral composition is the gehlenite (Ca)₂Al₂SiO₇) Quartz (SiO)₂) Calcium iron garnet (Ca)₃Fe₂(SiO₄)₃) And perovskite (Ca)₃TiFeSi₃O₁₂)。

The granulated slag refers to slag of an iron-making blast furnace. It is melted at high temperature and cooled rapidly with water to form a granulated foam which is milky white, light, crisp, porous and easily ground into fine powder.

The rock wool is an inorganic fibre made up by using natural rock such as basalt, gabbon, dolomite, iron ore and bauxite as main raw material and adopting high-temp. melting process. Rock wool is often used as a heat insulation material, however, most of the existing rock wool is produced by adding dolomite into basalt, which requires a large amount of mountain mining, and destroys the landform and ecological environment of a mountain. For the purpose of environmental protection, it is necessary to develop a method for preparing a new polymer silicon aluminum polymeric material as a filler to replace natural stones such as basalt, dolomite, etc.

Disclosure of Invention

The invention mainly aims to provide a new polymer silicon-aluminum polymerization material and a preparation method thereof, and aims to solve the problem that the existing preparation method of heat insulation materials such as rock wool and the like is not environment-friendly.

In order to achieve the purpose, the invention provides a new polymer silicon aluminum polymerization material as a heat insulation material filler, wherein the new polymer silicon aluminum polymerization material comprises, by weight, 30-50 parts of red mud and 30-60 parts of coal gangue.

Furthermore, the raw material of the new polymer silicon-aluminum polymerization material also comprises 10-30 parts by weight of water granulated slag.

Further, the weight ratio of the red mud to the grain slag is 50-70: 20-50.

In order to achieve the above object, one aspect of the present invention provides a method for preparing a new polymer silicon aluminum polymeric material, the method comprising the following steps: mixing red mud and coal gangue, extruding and high-temperature burning.

Further, the mixture also comprises water granulated slag.

Further, pressing the red mud, the coal gangue and the grain slag to obtain raw material ball blocks; preferably, the pressure in the pressing process is 4.5-19.5 Pa.

By applying the technical scheme of the invention, the red mud and the coal gangue are used as raw materials for preparing the new polymer silicon-aluminum polymerization material, so that the red mud and the coal gangue can be reasonably utilized, waste is turned into wealth, the economic utilization efficiency of the red mud and the coal gangue can be improved, and the environment is improved. Meanwhile, the red mud and the coal gangue have lower thermal conductivity, so that the prepared new polymer silicon-aluminum polymeric material has better heat preservation property. In addition, the tensile strength of the new polymer silicon-aluminum polymerization material is improved by limiting the using amount of the components in the raw materials. In conclusion, the new polymer silicon-aluminum polymeric material provided by the application has the characteristics of good heat preservation, environmental friendliness, higher tensile strength and the like. The new material is used as filler to replace natural stone materials such as basalt, dolomite and the like, so as to achieve the purpose of protecting the environment.

Detailed Description

As described in the background art, the preparation method of the existing new polymer silicon aluminum polymerization material has no problem of environmental friendliness. In order to solve the technical problems, the invention provides a new polymer silicon-aluminum polymerized material, which comprises 30-50 parts of red mud and 30-60 parts of coal gangue by weight.

The red mud is residue produced after alumina is extracted from bauxite by Bayer process. The residues are red brown due to rich iron oxide, are called red mud slag and belong to harmful solid wastes, the red mud occupies thousands of acres in China at present, and in addition, the pollution of the red mud to the surrounding environment causes no land around the sludge to be cultivated and the groundwater cannot be drunk. The red mud has a melting point of 1200-1250 ℃, a pH value of 10-12 and a particle size0.08 to 0.25 μm, a relative density of 2.7 to 2.9, and an apparent relative density of 0.8 to 1.0. The chemical components of the method are slightly different with the difference of the production process for extracting the alumina, and the main mineral composition is the gehlenite (Ca)₂Al₂SiO₇) Quartz (SiO)₂) Calcium iron garnet (Ca)₃Fe₂(SiO₄)₃) And perovskite (Ca)₃TiFeSi₃O₁₂)。

The application firstly proposes that the red mud and the coal gangue are used as raw materials for preparing the new polymer silicon-aluminum polymerization material, so that the red mud and the coal gangue can be reasonably utilized, waste is turned into wealth, the economic utilization efficiency of the red mud and the coal gangue can be improved, and the environment is improved. Meanwhile, the red mud and the coal gangue have lower thermal conductivity, so that the prepared new polymer silicon-aluminum polymeric material has better heat preservation property. In addition, the tensile strength of the new polymer silicon-aluminum polymerization material is improved by limiting the using amount of the components in the raw materials. In conclusion, the new polymer silicon-aluminum polymeric material provided by the application has the characteristics of good heat preservation, environmental friendliness, higher tensile strength and the like. The new material is used as filler to replace natural stone materials such as basalt, dolomite and the like, so as to achieve the purpose of protecting the environment.

The application also provides a preparation method of the novel polymer silicon-aluminum polymerization material, which comprises the following steps: the mixture of the red mud, the coal gangue and the grain slag is mixed, extruded and burnt at high temperature.

The raw materials of the new polymer silicon-aluminum polymerized material in the preparation method are red mud and coal gangue, the red mud is residue obtained after aluminum is extracted from bauxite and aluminum oxide is extracted, and the coal gangue is solid waste obtained in the coal mining and coal washing processes, so that the purpose of waste utilization can be achieved by adopting the two raw materials to prepare the new polymer silicon-aluminum polymerized material, and meanwhile, the landform and ecological environment of a mountain cannot be damaged. In conclusion, the preparation method has the advantages of low cost, environmental friendliness and the like.

The preparation method has the characteristics of low cost, environmental friendliness and the like. In a preferred embodiment, the mixture further comprises granulated slag. The addition of the granulated slag is beneficial to improving the fluidity of the raw materials in the preparation process, thereby being beneficial to the subsequent treatment process of the pendulum method.

In a preferred embodiment, the red mud and the granulated slag are pressed to obtain raw material pellets. The red mud and the grain slag are pressed into balls, so that dust in the production process can be reduced, and the environment friendliness of the preparation method is further improved. Preferably, the pressure in the pressing process is 4.5-19.5 Pa. The above-mentioned pressure includes, but is not limited to, the above-mentioned range, but it is advantageous to limit the pressing pressure to the above-mentioned range in order to improve the molding rate of the raw material pellet.

In a preferred embodiment, when the heat source is provided by fuel combustion in the smelting process, the weight ratio of the coal gangue to the fuel is 30-60: 10-30. The coal gangue has a certain carbon content, so that a certain amount of heat can be provided in the capacity process. The weight ratio of the coal gangue to the fuel is not limited to the range, but the weight ratio of the coal gangue to the fuel is limited to the range, so that the smelting effect is improved, and the fuel consumption is saved.

In the preparation method, the coal gangue is beneficial to improving the smelting effect of heat-insulating materials such as rock wool and the like. In a preferred embodiment, the fuel includes, but is not limited to, coke or natural gas. The coke has higher heat value, so the adoption of the coke as the fuel is beneficial to further improving the smelting effect and saving the process cost.

Claims

1. A new high-molecular Si-Al polymer material is prepared from red mud, coal gangue and water dregs through mixing, stirring, extruding and high-temp heating.

2. The new polymer silicon-aluminum polymerization material is characterized by comprising 30-50 parts by weight of red mud and 30-60 parts by weight of coal gangue.

3. The new polymer silicon aluminum polymerization material of claim 1, characterized in that the raw material of the new polymer silicon aluminum polymerization material further comprises 10-30 parts by weight of water slag.

4. The new polymer silicon aluminum polymerization material as claimed in claim 2, wherein the weight ratio of the red mud to the grain slag is 50-70: 20-50.

5. The production method according to claim 3, characterized by a process of pressing the red mud and the grain slag to obtain raw material balls; preferably, the pressure in the pressing process is 4.5-19.5 Pa.