JPH06241666A - Constructing method for monolithic refractory - Google Patents

Abstract

PURPOSE:To obtain a method wherein a monolithic refractory kneaded with a very low moisture and having a high viscosity is brought in a stable state to a place of construction with ease and constructed. CONSTITUTION:A constructing method for a monolithic refractory featured by that the monolithic refractory kneaded with an added moisture of 6% or below by outer percentage is sent under a discharge pressure of 10kg/cm<2> or above and supplied to and filled in a part of construction continuously while the compaction of the monolithic refractory is maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a method for easily and stably applying a highly viscous amorphous refractory material kneaded with a low water content in a stable state without impairing the characteristics of the material.

[0002]

2. Description of the Related Art Conventionally, as a method of applying a kneaded amorphous refractory material, a method of applying a pressure pump as disclosed in JP-A-54-90211 has been proposed and used. It was However, in recent years, as a means for improving the durability of amorphous refractories, a dense material having a reduced amount of water added during kneading and a reduced number of pores generated by dehydration during drying has come to be favored. . In addition, wires are added to the dense material to prevent thermal spalling, and such an amorphous refractory is subjected to a conventional pressure-feeding construction method, that is, a kneaded amorphous refractory is replaced with a rubber tube (pumping tube). ) And squeeze while squeezing the tube with a rotating roller to squeeze the rubber tube, causing problems such as rubber tube wear and wire damage, and a high-viscosity mixture with 6% or less of added water without added wire. With the material, the pressure loss resistance inside the pipe becomes large and high-speed high-pressure operation cannot be performed, so the material clogged inside the pipe and it was difficult to perform satisfactory construction.

For this reason, there are cases in which irregular refractory materials kneaded by a kneading machine are once received in a bucket for construction, or a relay gutter is installed in the kneading machine. Cases using buckets are inefficient and require a long time for construction, so the material begins to harden during construction and a uniform construction body cannot be obtained.
In the case of using a relay gutter, even if the gutter is inclined at an angle of 45 ° or more, the viscous material adheres to the gutter and makes it difficult for it to flow. A method for expressing the fluidity of the material is implemented. However, large vibration is required to develop sufficient fluidity, and this vibration causes a problem that large particles and wires in the material are separated during the movement along the relay gutter and a uniform construction body cannot be obtained. Was.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned background, and solves problems such as wear and damage of a conventional rubber tube, high speed and high pressure operation, and the like.
It is intended to provide a method for constructing an amorphous refractory that is kneaded with a high viscosity at an added water content of 6% or less in a short time in a stable state without impairing the material properties.

[0005]

As a constitution of the present invention,
An irregular shaped refractory that is kneaded at an external moisture content of 6% or less is pressure-fed at a discharge pressure of 10 kg / cm ² or more to maintain the compaction of the irregular shaped refractory and to continuously supply and fill the working portion. It is in the construction method of standard refractories.

[0006] Further, the supply of the irregular shaped refractory material is carried out in a short time, and in order to perform the construction stably without deteriorating the material characteristics, stirring is carried out in order to avoid clogging of the material from the kneading hopper at the suction port. In order to avoid the problems of rubber tube wear and damage in the conventional squeeze system, the device was changed to an electric or hydraulic piston type pump, and multiple suction and discharge of the kneaded material from the hopper were alternately performed. By installing an electric or hydraulic cylinder, the device is configured so that the supply of material does not become intermittent.

The discharge pressure of the electric or hydraulic cylinder can be easily determined by estimating it from Poiseuille's equation (1) in consideration of each physical property value and operating condition.

[0008]

[Equation 1]

Amorphous refractory which is kneaded with a low water content of 6% or less by addition of added water has a high viscosity and cannot be applied because the pressure is low with a conventional squeeze pump. For this reason, the added water content is 6% or more, and generally 8 to 12%. FIG. 1 shows the relationship between the added water content of the amorphous refractory and the apparent porosity and the corrosion resistance. When the added water content is 6% or more, the apparent porosity increases and the corrosion resistance remarkably decreases. 6% or less, preferably 5%
When it is below, the apparent porosity is lowered and the corrosion resistance is significantly improved.

Test method: Rotational erosion test method Test conditions: 1650 ° C. × 5 hours, slag basicity C / S
= 3.0 Sample is high alumina castable (Al ₂ O ₃ = 92%)
use. As for the corrosion resistance index, the amount of erosion of a material having an added water content of 7% was set to 100. The apparent porosity is the measured value of the sample after drying at 110 ° C.

Further, when the amount of added water is large, there is a problem that the added water and the indefinite refractory are separated after kneading. Therefore, when the amount of water added is large, it is necessary to knead the kneaded amorphous refractory until the entire amount is fed to the squeeze pump. When kneading with 6 to 8% water, excess water may be separated by crushing the tube and a uniform work piece may not be obtained.

The construction method of the present invention will be described with reference to FIGS. First, the kneaded amorphous refractory 5 is first stored in the hopper 1 having the stirring device 7 of the pumping device main body 10,
Since it is continuously fed while stirring, the water separation phenomenon does not occur even if there is excess water. 5%
When the following irregular shaped refractory 5 kneaded with low water content is left standing, hardening progresses from the surface and skinning occurs and a uniform work cannot be obtained, and vibration of the relay gutter 7 that relays the hopper 1 from the kneader 8 The problem of separation of large particles and wires is re-mixed by continuous agitation in the hopper 1 to a uniform state, and even in the case of irregular shaped refractory to which wires are added, the material of the cylinder and piston 2 is made of metal, causing wear and abrasion. The problem of damage can be eliminated.

Further, since the material is stored in the hopper 1, the material is continuously filled by the cylinder 2 and the piston 2 in each of which a plurality of materials are installed, and the material is sufficiently filled in the transportation pipe 3.
It is possible to prevent the entrainment of air, which becomes pores in the construction body, and to prevent the separation of particles and water in the transfer pipe 3, while adjusting the kneading speed of the kneader 8 and the storage capacity of the hopper 1 and the transfer speed of the cylinder and piston for continuous operation. By the above-mentioned conveyance, it is possible to finish into a seamless construction body, which is compacted on the construction surface, and can be supplied in a continuous extruded tube of, for example, a toothpaste.

Further, even in the construction of the kiln furnace equipment in which the construction equipment cannot be leaned against, it is possible to easily carry out the construction by adjusting the length of the transfer pipe 3. Even in the case of long-distance conveyance, the material can be sufficiently filled in the pipe and continuously conveyed, so that a uniform work body without particle and water separation is formed.

When an irregular shaped refractory material having an added water content of 6% or less, preferably 5% or less is applied by the method of the present invention, it can be applied in a stable state in a short time without damaging the material properties. However, as an irregular shaped refractory for improving workability, it is possible to increase the amount of a dispersant such as sodium pyrophosphate, sodium polyacrylate or the like to delay the curing time, improve the slippage of the refractory particles, and improve the fluidity and It is preferable to use spherical particles for improving the filling property.

As a result, even in the case of an amorphous refractory material kneaded with a low water content of 6% or less, the workability is good, and particularly, the construction area is narrow and it is difficult to fill the kneaded amorphous refractory material in the kiln. Furnace equipment and kiln kiln equipment where kneading and construction equipment are less prone to work can be carried out in a stable state without deteriorating the material properties. It is possible to improve the property and reduce the amount of repair material used.

[0017]

EXAMPLES Examples of the present invention will be shown below. The amorphous refractory material shown in Table 1 is kneaded by a large-scale kneading machine 8 with an external water content of 5.5%, and then the kneading irregular refractory material 5 is installed from a relay gutter 9 to a stirrer 7 of a pump 10 of the present invention. It is charged into the hopper 1 and is sucked and discharged through the suction / discharge pipe 6 alternately by the two series of hydraulic cylinders 2 through the two-hole slide plate 4 and the transfer pipe 3 to the receiving hole frame 1 of the towing car 11.
It was installed in the space between 2 and the brick. In addition, the degassing device 13 is used to remove an irregular refractory material in which added water is kneaded at 4.0%.
Similarly, the immersion pipe 14 and the immersion pipe frame 15 and the immersion pipe core metal 16
It was installed in the space part with. In each construction, the discharge pressure of the hydraulic cylinder was set to 45 kg / cm ² and sufficient conveyance was possible. Tables 2 and 3 below show a comparison of the construction results and the results of the furnace materials of the construction bodies when construction is performed by the conventional method.

[0018]

[Table 1]

[0019]

[Table 2]

[0020]

[Table 3]

[0021]

EFFECTS OF THE INVENTION According to the present invention, the constructed construction body can be extremely dense and high in strength and can exhibit a function excellent in corrosion resistance, and at the same time, it has been a particular problem in the case of amorphous refractories. It is possible to improve workability and work time when conveying low slump values kneaded with low water content.

[Brief description of drawings]

FIG. 1 is a diagram showing the relationship among the amount of added water, the apparent porosity, and the corrosion resistance of an amorphous refractory material.

FIG. 2 is an explanatory diagram of a pressure feeding device used for implementing the present invention.

3 (A), (B) and (C) are diagrams showing a schematic view of a pressure feeding method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hopper 2 ... Hydraulic cylinder 3 ... Conveying piping 4 ... 2 hole slind board 5 ... Kneading irregular-shaped refractory 6 ... Suction discharge pipe 7 ... Stirring device 8 ... Kneading machine 9 ... Relay gutter 10 ... Pumping device main body 11 ... Mixing pig wheel 12 ... Receptacle frame 13 ... Degassing device 14 ... Immersion pipe 15 ... Immersion pipe frame 16 ... Immersion pipe core metal

Claims (1)

[Claims] 1. An amorphous refractory which is kneaded at an external moisture content of 6% or less is pressure-fed at a discharge pressure of 10 kg / cm ² or more to maintain the compaction of the irregular refractory and to continuously carry out a working part. A method for constructing an irregular-shaped refractory, characterized by supplying and filling the refractory.