KR19990051961A - Clay brick manufacturing method - Google Patents

Abstract

The present invention relates to a clay brick manufacturing method, and its object is to provide a method for producing a clay brick having a very small plastic strain by containing an appropriate amount of stainless steel slag whose particle size is adjusted as a component of the clay brick. It is.

In order to achieve the above object, the present invention provides a method of manufacturing clay bricks containing clay as the main material, wherein the content ratio of clay and particle size adjusting stainless steel slag is 70% by weight-40% by weight and 30% by weight-60% by weight. The present invention relates to a clay brick production method characterized by mixing raw materials, mixing with water, kneading under vacuum, molding and then firing at a temperature of 1050 to 1150 ° C for at least 1 hour.

Description

Clay brick manufacturing method

The present invention relates to a method of manufacturing a clay brick, and more particularly to a method of manufacturing a clay brick having a small plastic strain using stainless steel slag.

In general, clay has many industrial uses because of its sintering properties and hardening like a rock when heated, and is also used as a raw material such as ceramics and refractory materials, paper and cloth fillings, and medicines.

Clay bricks having such clays as main components are prepared by adding silica sand or / and stone powder to clays, smelting raw materials, drying and firing. However, the above-mentioned general clay brick is pointed out as a big problem because the plastic strain is about 5-10%.

On the other hand, proposals for clay bricks include Korean Patent Publication No. 95-8410 and Japanese Patent Application Laid-open No. Hei 6-720754. The clay bricks by this proposal also have a high plastic strain.

In order to reduce the plastic strain which is a problem of clay bricks as described above, the present inventors have repeatedly conducted research and experiments and proposed the present invention based on the results. It is an object of the present invention to provide a method for producing a clay brick having a very small plastic strain by containing an appropriate amount of adjusted stainless steel slag.

In order to achieve the above object, the present invention provides a method of producing a clay brick containing clay as a main material, wherein the content ratio of clay and the stainless steel slag particle size adjusted to 5 mm or less is 70% by weight to 40% by weight and 30% by weight to It relates to a clay brick manufacturing method characterized in that the raw material is blended to 60% by weight, hydrolyzed, vacuum drilled and molded, and then calcined at a temperature of 1050 ~ 1150 ℃ for 1 hour or more.

Hereinafter, the present invention will be described in detail.

In general, the method for producing clay brick is calcined, dried and calcined with the main raw material such as clay and silica sand or stone powder, the present invention is the main raw material of clay brick so as to greatly reduce the plastic deformation occurring during the firing of clay brick Particle size adjustment stainless steel slag is used as a component for

It is preferable that the particle size adjusting stainless steel slag used has a particle size of 5 mm or less. If it exceeds 5 mm, the filling property is poor, and a compact structure is not obtained.

The use of such fine grained stainless steel slag is preferably at least 30% by weight and less than 60% by weight. The reason for this is that when the amount of the grain-adjusted stainless steel slag is less than 30% by weight, the effect of reducing the plastic strain of the clay brick is insufficient. If the amount of the adjusted stainless steel slag used exceeds 60% by weight, the effect of expansion due to the crystallization of the slag is too large to increase the overall strain rate.

In the present invention, the firing temperature range is preferably 1050 ° C. or higher and 1150 ° C. or lower, since a sufficient firing reaction does not occur when the firing temperature is lower than 1050 ° C., and the molded body melts when it exceeds 1150 ° C.

In the above temperature range, the firing time is sufficient for 1 hour or more, and in less than 1 hour, a uniform and sufficient firing reaction does not occur.

Hereinafter, the present invention will be described in more detail with reference to Examples.

Example 1

Stainless steel slag with a particle size adjusted to 5 mm or less was mixed with clay in the ratio as shown in Table 1 below to obtain a blended raw material. The raw material was kneaded and mixed to obtain a water content of 20%, vacuum drilled using a refining machine, and then fired at a firing temperature of 1150 ° C. for 5 hours to prepare clay bricks. The results of measuring the strain of clay brick according to the slag content are shown in Table 1 below.

division Slag content (% by weight) Plastic Strain (%) Comparative Example 1 20 2.4 Inventive Example 1 30 1.1 Inventive Example 2 60 1.3 Comparative Example 2 70 2.2

As can be seen in Table 1, when the slag content is 30% by weight (Invention Example 1), 60% by weight (Invention Example 2), the slag content is 20% by weight (Comparative Example 1) and 70% by weight (Comparative Example 2). It can be seen that the plastic strain can be significantly reduced to almost 1/2 or less than

Example 2

40% by weight of clay and 60% by weight of fine-grained stainless steel slag, kneading with water to make a water content of 20%, vacuum-molding with a refining machine, and then baking at 1000-1200 ° C for 5 hours. To prepare a clay brick. The results of measuring the strain of clay bricks according to the firing temperature are shown in Table 2 below.

division Firing temperature (℃) Plastic Strain (%) Comparative Example 3 1000 Incomplete firing Inventive Example 3 1050 1.1 Inventive Example 4 1150 1.3 Comparative Example 4 1200 Indeterminate

As shown in Table 2 above, it was found that the firing temperature range was 1050 ° C to 1150 ° C because the molded body was not melted sufficiently at 1200 ° C or lower and became indefinite at 1050 ° C or lower.

Example 3

50% by weight of clay and 50% by weight of stainless steel slag for adjusting the particle size, mixing with water, kneading to make water content of 20%, and molding by vacuum drilling using a refining machine and then changing the firing time from 1150 ℃ to 30 minutes-9 hours. To prepare a clay brick. Table 3 shows the results of measuring the strain of clay brick according to firing time.

division Firing time (hours) Plastic Strain (%) Comparative Example 5 0.5 Incomplete firing Inventive Example 5 One 0.67 Inventive Example 6 5 0.65 Inventive Example 7 7 0.86 Inventive Example 8 9 0.88

As shown in Table 3, when the firing time was 1 hour or more, the plastic strain was less than 1%, and the plastic strain was greatly reduced.

As described above, according to the present invention, in the manufacture of clay bricks, the use of the particle size adjusting stainless steel slag makes it possible not only to provide clay bricks with low plastic strain, but also to utilize stainless steel slag.

Claims (1)

In the method of manufacturing a clay brick containing the main raw material, The blending ratio of clay steel slag with a particle size adjusted to 5 mm or less is 70% to 40% by weight and 30% to 60% by weight, and the raw materials are mixed, hydrolyzed and vacuum drilled and molded. Clay brick production method characterized by firing at least one hour at a temperature.