阅读说明：本技术 一种用于耐火材料的环保型结合剂及其制备方法 (Environment-friendly bonding agent for refractory material and preparation method thereof ) 是由 王楠 于 2020-06-01 设计创作，主要内容包括：本发明涉及一种用于耐火材料的环保型结合剂及其制备方法,由以下原料按质量份组成：工业葡萄糖25-35份；甘油25-35份；纸浆废液25-35份；铝粉5-15份。优点是：本发明生产的环保型结合剂对耐火材料的混炼、成型性能以及制品的纤维结构都会产生良好的影响,有效提高了耐火材料的耐高温性能、强度和使用寿命,并简化镁质耐火材料的生产工艺,不需要高温烧成工序。(The invention relates to an environment-friendly bonding agent for refractory materials and a preparation method thereof, wherein the bonding agent comprises the following raw materials in parts by mass: 25-35 parts of industrial glucose; 25-35 parts of glycerol; 25-35 parts of pulp waste liquid; 5-15 parts of aluminum powder. The advantages are that: the environment-friendly bonding agent produced by the invention has good influence on the mixing and forming performance of the refractory material and the fiber structure of the product, effectively improves the high-temperature resistance, the strength and the service life of the refractory material, simplifies the production process of the magnesium refractory material and does not need a high-temperature sintering process.)

1. An environment-friendly bonding agent for refractory materials is characterized by comprising the following raw materials in parts by mass:

25-35 parts of industrial glucose; 25-35 parts of glycerol; 25-35 parts of pulp waste liquid; 5-15 parts of aluminum powder.

2. The environment-friendly bonding agent for the refractory material as claimed in claim 1, wherein the aluminum powder comprises the following components in percentage by mass:

the aluminum powder with the particle size of more than 89 mu m is less than or equal to 15 percent;

aluminum powder with the particle size of more than or equal to 44 mu m and less than or equal to 89 mu m is more than 50 percent;

the aluminum powder with the particle size less than or equal to 33 mu m is less than 10 percent.

3. The environment-friendly bonding agent for refractory materials as claimed in claim 1, wherein the pulp waste liquid is an acidic pulp waste liquid.

4. The preparation method of the environment-friendly bonding agent for refractory materials according to claims 1 to 3, characterized by comprising the following steps:

1) putting the raw materials into a reaction kettle, stirring and heating to 140-160 ℃, wherein the pressure of the reaction kettle is 0.010-0.020 MPa;

2) after cooling, the binder was obtained.

5. The method for preparing the environment-friendly bonding agent for the refractory material as claimed in claim 4, wherein the bonding agent obtained in the step 3) is applied to the production of magnesia carbon bricks.

6. The method for preparing the environment-friendly bonding agent for the refractory material as claimed in claim 4, wherein the bonding agent obtained in the step 3) is added to the magnesium dry material.

Technical Field

The invention belongs to the field of refractory materials, and particularly relates to an environment-friendly bonding agent for a refractory material and a preparation method thereof.

Background

The binder plays a very important role in the refractory material, affecting the strength, performance and service life of the refractory material. The traditional refractory material binding agent generally contains carcinogenic substances, odor and smoke such as phenolic resin, tar, asphalt and the like, seriously pollutes the atmospheric environment and threatens the health of human bodies, and meanwhile, the use quality of the binding agent is not ideal, so that the service life of the refractory material is influenced.

The existing bonding agents used for refractory materials are mainly silicates (such as water glass and the like), sulfates (such as pulp waste liquid and the like), halides (such as brine and the like), phosphates, aluminates, phenolic resins, asphalt and the like, and the bonding agents cannot well form grain boundary bonding of a recombination phase, so that the compression strength and the erosion resistance at high temperature are not ideal, the recombination phase is firstly damaged to cause the damage of the whole refractory material, for example, a magnesia brick (called as steel taphole brick) used for a tap hole of an open hearth furnace has the service life of only 20-30 furnaces, and the production requirement cannot be met. Moreover, the magnesium refractory using such a binder generally requires a high-temperature firing step.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an environment-friendly bonding agent for refractory materials and a preparation method thereof, which improve the high-temperature resistance, the strength and the service life of the refractory materials, simplify the production process of the magnesium refractory materials and do not need a high-temperature sintering process.

In order to achieve the purpose, the invention is realized by the following technical scheme:

an environment-friendly bonding agent for refractory materials is composed of the following raw materials in parts by mass:

25-35 parts of industrial glucose; 25-35 parts of glycerol; 25-35 parts of pulp waste liquid; 5-15 parts of aluminum powder.

The aluminum powder comprises the following components in percentage by mass:

the aluminum powder with the particle size of more than 89 mu m is less than or equal to 15 percent;

aluminum powder with the particle size of more than or equal to 44 mu m and less than or equal to 89 mu m is more than 50 percent;

the aluminum powder with the particle size less than or equal to 33 mu m is less than 10 percent.

The paper pulp waste liquid is acidic paper pulp waste liquid.

A preparation method of an environment-friendly bonding agent for refractory materials comprises the following steps:

1) putting the raw materials into a reaction kettle, stirring and heating to 140-160 ℃, wherein the pressure of the reaction kettle is 0.010-0.020 MPa;

2) after cooling, the binder was obtained.

The bonding agent obtained in the step 3) is applied to the production of the magnesia carbon brick.

Adding the bonding agent obtained in the step 3) into the magnesium dry material.

Compared with the prior art, the invention has the beneficial effects that:

the environment-friendly bonding agent produced by the invention has good influence on the mixing and forming performance of the refractory material and the fiber structure of the product, effectively improves the high-temperature resistance, the strength and the service life of the refractory material, simplifies the production process of the magnesium refractory material, does not need a high-temperature sintering process and the like. The main raw material for producing the environment-friendly binding agent is the paper pulp waste liquid in the paper making industry, so that the production cost is reduced, and the waste liquid is recycled. The preparation method has the advantages of simple process, low cost and environmental protection.

Detailed Description

The present invention is described in detail below, but it should be noted that the practice of the present invention is not limited to the following embodiments.

An environment-friendly bonding agent for refractory materials is composed of the following raw materials in parts by mass:

25-35 parts of industrial glucose; 25-35 parts of glycerol; 25-35 parts of pulp waste liquid; 5-15 parts of aluminum powder. The paper pulp waste liquid is acid paper pulp waste liquid.

The aluminum powder comprises the following components in percentage by mass: the aluminum powder with the particle size of more than 89 mu m is less than or equal to 15 percent; aluminum powder with the particle size of more than or equal to 44 mu m and less than or equal to 89 mu m is more than 50 percent; the aluminum powder with the particle size less than or equal to 33 mu m is less than 10 percent.

The industrial glucose mainly has a thickening effect, the glucose is of a polyhydroxy carbon chain structure, the glycerol mainly has a moisturizing effect, the sulfite in the pulp waste liquid contains a large amount of lignosulfonate, sugar, aldehyde and other reducing substances, and a binding agent formed by heating and fully mixing the sulfite with the glycerol and the pulping waste liquid has a good thickening effect and a moisturizing effect, so that the production process requirement of the magnesia carbon brick is met. The pulp waste liquid is added into the binding agent for producing the refractory bricks, so that the strength of the refractory bricks can be improved, the plasticity of the raw materials can be improved in the refractory brick production process, the friction force among refractory brick particles is reduced, and the density of the refractory bricks is improved.

If the bonding agent is added into the magnesia carbon brick as a raw material, the aluminum powder plays an antioxidation role in the magnesia carbon brick to prevent the oxidation of carbon. The existence of carbon in the magnesia carbon brick mainly prevents slag from eroding the magnesia carbon brick so as to improve the erosion resistance of the magnesia carbon brick, but the carbon has the characteristic of easy oxidation, when the carbon in the magnesia carbon brick is oxidized, the erosion resistance of the brick is reduced along with the carbon, the carbon oxidation accelerates the damage of the brick, the service life is reduced, therefore, the easily oxidized metal aluminum powder is added to protect the carbon in the brick, and the erosion resistance, the slag resistance, the spalling resistance and the high-temperature dismantling resistance of the magnesia carbon brick are improved. If the bonding agent is added into the magnesium dry material, the aluminum powder has the function of oxidation resistance, so that the magnesium dry material is better bonded with the refractory brick.

A preparation method of an environment-friendly bonding agent for refractory materials comprises the following steps:

1) putting the raw materials into a reaction kettle, stirring and heating to 140-160 ℃, wherein the pressure of the reaction kettle is 0.010-0.020 MPa;

2) after cooling, the binder was obtained.

When the bonding agent is not completely cooled to room temperature, the liquid bonding agent can be directly added into the magnesia carbon brick raw material to produce the magnesia carbon brick. The completely cooled solid binder is crushed and then added into the magnesium dry material.