JPS6129702Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a chute for producing granulated slag. Today, blast furnace slag, converter slag, etc. are used as resources for granulated water, artificial stone, rubble, fine aggregate, and other raw materials. For example, to outline the example of manufacturing granulated water from blast furnace slag shown in Fig. 1, slag 6 discharged from the blast furnace is stored in a container 1, temperature-controlled and basicity-controlled, and transported to a granulated water production plant 2. The slag is spread from the container 1 to the slag treatment chute 3 and is scattered into water by the rotating drum 4 to produce granulated water. In order to guide the slag 6 to the destination in this manner, it is customary to use the chute 3 for producing sludge granulation. Conventionally, there have been various types of chute for producing granulated slag: an iron jacket type, a super-thick plate type, and a type in which these are made of heat-resistant fatigue material such as stainless steel. However, these various types of slag production chute suffer from thermal deformation and thermal strain due to the sensible heat of the slag, resulting in extremely short lifespans of approximately 84,000 tons and high costs. Furthermore, if cracks or the like occur in the chute, water may leak from the jacket, inducing a steam explosion, resulting in unsafe work. In order to solve the above problems, the present invention provides a metal material with an amorphous refractory layer via studs, and a peeling layer that generates gas components on the surface of the refractory layer by the sensible heat of the slag. It is characterized by being configured with the following features. That is, the chute 3 for producing slag water according to the present invention
An example of the configuration is as shown in FIGS. 2 and 3. As shown in FIG. 3, the metal formwork 7 is provided with a mass-shaped rib 8, and a roughly V-shaped stud 9 is provided inside the rib 8. The mass-shaped ribs 8 serve to prevent thermal deformation of the metal formwork 7, suppress the growth of cracks in the monolithic refractory layer, and firmly fix the refractory layer. Further, the studs 9 serve to firmly fix the monolithic refractory layer. Brackets 10 and 11 are attached to the non-operating side (back side) of the metal formwork 7, and one bracket 10 is attached to a bracket 13 disposed on the base 12.
It is attached via the shaft 14 and serves as a fulcrum. The other bracket 11 is configured to be rotatable in the direction of the arrow by attaching a rod 16 of a cylinder 15 rotatably provided to the base 12. FIG. 2 is an enlarged vertical cross-sectional view of the slag treatment chute 3 shown in FIG.
A release agent layer 18 is provided on the surface. The main components of the monolithic refractory material 17 are preferably those shown below. SiC 10-25% SiO ₂ 20-30% Al ₂ O ₃ 40-60% C 0-5% or the components of the release agent layer 18 are, for example, CaCO ₃
If it is a type of stripping agent, the sensible heat of the slag will generate CO ₂ gas, improving stripping performance. This release agent layer 18
is provided on the surface of the monolithic refractory layer 17 by spraying or hand-painting each time the chute 3 for producing granulated slag is used. In this way, the monolithic refractory layer 17 is applied to the metal formwork 7 via the studs 8, and the peeling layer 18 is provided on the surface of the layer 17. After drying naturally for about 24 to 48 hours, the slag is gradually heated in a drying furnace, heated to about 800℃ and then allowed to cool naturally, or the slag is spread on a slag field and peeled on top of it. A method is employed, such as placing it in a state where the agent layer 18 is in contact with it, covering the surrounding area, and drying it at a low temperature for about one week to dehydrate it. However, the former tends to cause minute cracks, and depending on the moisture content, blistering may occur in the monolithic refractory layer 17 and the release agent layer 18.
The latter is the most recommended drying method because it rarely occurs. The chute 3 for producing sludge granulation according to the present invention constructed in this manner is used, for example, as shown in FIGS. 1 and 2, and guides the slag 6. If molten slag 6 adheres to the chute surface during such intermittent use, the adhering molten slag 6 is removed from the chute 3 by sprinkling water and using a thermal shock. Even in such a case, since the above-described drying method is applied, the operating surface of the chute 3 maintains its robust state. The results of trial use of the slag manufacturing chute 3 according to the present invention, the conventional chute described above, and the chute without the release agent layer 18 as a comparative example in the slag manufacturing plant 2 illustrated in FIG. A comparison is shown in Table 1.

[Table] As is clear from the above table, the chute for producing granulated slag according to the present invention is significantly improved over the conventional chute for producing granulated slag as follows. Durability: Extended by 60 days. Lifespan improved by 29%. Processing cost: Increased by 24,000 tons per generation, processing amount is 29
% increase. Cost: The cost per tonne of slag has been reduced by 81%. In addition, we also tried a chute in which the monolithic refractory layer 17 of the slag treatment chute 3 according to the present invention was replaced with a shaped refractory layer, but the joints tended to be defective and the result was not as good as the present invention. As described above, the present invention has achieved significant improvements in work safety, extended service life, and manufacturing costs that were not available with conventional slag processing chute, which are required for sludge granulation production chute, and has been put into practical use. have sex.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of the granulated water production plant, Figure 2
The figure is an enlarged longitudinal cross-sectional view of a chute for producing slag granulation according to the present invention, and FIG. 3 is an enlarged perspective view of the main part of FIG. 2. 1; Container (slag pot), 2; Granulated water production plant,
3; Slag processing chute, 4; Rotating drum, 5; Collection tank, 6; Slag, 7; Metal material, 8; Mass-shaped rib, 9; V-shaped stud, 10, 11; Bracket, 12; Base, 13; Bracket, 14;
Shaft, 15; Cylinder, 16; Rod, 17; Amorphous refractory material, 18; Release agent layer.

Claims (1)

[Scope of utility model registration request] A bracket is provided on the non-working side of the metal formwork,
The formwork is rotatably fixed to the base by a cylinder, a mass-shaped rib is provided on the working side of the formwork, studs are planted on the working side, and a monolithic refractory layer is formed through the studs, A chute for producing slag granulation, which has a gas component-generating stripping agent layer provided on the surface of the refractory layer.