JPS5852116B2 - Articles with weighted layers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to pipes and containers for the conveyance of media, in particular oil and gas and other gaseous and liquid media, and similar articles, in particular at least one type of aggregate of high specific gravity. The present invention relates to an article including a weighted layer having hydraulic properties made of (aggregate).

BACKGROUND OF THE INVENTION Pipes for conveying media, especially gaseous and liquid media, storage vessels and similar articles with weighted jackets are known from the prior art.

These types of pipes may also be used, for example, for conveying oil and gas underwater, where the pipes used do not float or bulge to undesirable heights. It is necessary to make the weight of the filter sufficiently large.

Particularly when such pipes are installed in areas where ships frequently travel, it is desirable to maintain the installed pipes as deep as possible to prevent them from being damaged by sailing ships. Similarly, containers used in ocean areas and the like need to be heavy so that they can be easily fixed.

One way to make pipes and containers heavier is to use weighted layers.

The conventionally used heavy duty sleeves are composed of concrete as a hydraulic agent mixed with fine particles of ballast or iron ore.

However, it is not preferable to use iron ore.

This is because iron ore itself is valuable and durable for use as a weight-bearing material.

On the other hand, when particulate ballast is used as aggregate, fine particles must be sieved out, and fine particles require more hydraulic agents to achieve cohesiveness, resulting in qualitatively inferior bone. As a result, the contribution as a desired weight is extremely small.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an article, in particular an article with a weighted layer of particularly high specific gravity which does not have the above-mentioned disadvantages and which also uses less concrete as hydraulic agent than in known heavy duty sleeves. That's true.

It is possible to not use concrete at all, but it may be necessary to leave it for a long time to harden or increase the temperature.
Either is required.

This objective is achieved by constructing the weighted layer with aggregate made from hydraulic slag from a metal blast furnace.

Furthermore, it is desirable to use steel slag from hydraulic metal blast furnaces as aggregate.

Due to the hydraulic effect of the slag from a metal blast furnace, which has a particularly high specific gravity, the weighted layer made of the present invention can be made into an extremely hard weighted layer without adding a significantly small amount of hardening agent, or even without adding any hardening agent. A larger quantity of particulate aggregate can be used than in known weighted shells, so that the layer or mass is significantly heavier.

Therefore, it is possible to apply a thin layer of the same weight and thickness to a desired article in a desired manner.

Another object of the invention is to provide a method for forming a weighted layer, in particular a coating layer on a pipe for conveying a medium, be it a gaseous or liquid fluid, or a container for storage liquid.

The weighted layer according to the present invention has a high specific gravity and contains a hydraulic mixture, and the hardening mixture is characterized in that the hardening mixture contains hydraulic slag from a metal blast furnace, preferably steel slag. do.

The invention will become clearer from the description given below with reference to some examples.

Example 1 Coating a Vessel 100 kilograms of steel slag with a particle size corresponding to 0-10725 (mm/mesh) is mixed with concrete or quicklime as required.

Concrete acts as a hastening hydraulic effect.

The metal container is inserted into a hollow cylinder that can be separated into two parts having an inner diameter larger than the outer diameter of the container.

The cylinder space between the container and the hollow cylinder is filled with the mixture.

Once the mixture is filled into the cylinder space, the whole thing is left in place for a day.

Thereafter, the outer hollow cylinder is removed and the container is ready for use.

The use of steel slag as aggregate in heavy duty sleeves allows for the inclusion of only a small amount of concrete as a hydraulic agent, or no concrete at all, or a smaller amount of concrete than in the known coverings for tanks. In a similar manner, the same particles Q
) It turns out that a sleeve consisting of ballast and concrete can be formed on this tank.

Also, a heavy sleeve according to the invention weighs at least 2 times less than a sleeve formed from ballast and concrete.
0% heavier.

When using steel slag from a metal blast furnace as particulate aggregate, an increase in the weight of the weight sleeve of approximately 15 percent is obtained over using iron or iron ore; When using slag from a metal blast furnace, the amount of concrete used is about 20 percent higher than when using slag from a metal blast furnace.

When using concrete and bulk aggregate, the same weight sleeve can also be obtained by mixing other alternatives, but with much less or no concrete as a hardening agent. You cannot get a weighted layer.

The latter situation is particularly important.

This is because it is desirable to cover the tank with a lid and a thin weighted layer.

Example 2 Metal pipe coating particle size 0-10/25 (mm/mesh)
A mixture of 100 kg of equivalent steel slag and the required amount of water are prepared.

The use of finely distributed aggregate is desirable.

This is to improve curing efficiency.

The mixture is sprayed onto the metal pipe by a spray technique.

The pipe can be coated with a coating layer that is 20 percent less thick than a pipe coated with concrete and/or a mixture of lime and ballast particles.

Having described an article with a weighted layer according to the invention as above, further embodiments of the invention are described below.

■) Articles with a weighted layer, characterized in that the aggregate consists of steel slag from a metal blast furnace.

2) the article consists of a pipe covered with a coating layer;
An article comprising a weighted layer of metal slag, wherein the coating layer is composed of steel slag.

3) A method for producing an article with a weighted layer, characterized in that it is mixed with steel slag from a hydraulic metal blast furnace.

4) A method for producing an article with a weighted layer, characterized by using finely ground steel slag.

Claims (1)

[Claims] 1 Articles with a hydraulic weighted layer composed of at least one type of aggregate with a high specific gravity for conveying or storing media, especially gaseous and liquid media, in which the weighted layer is made of a hydraulic metal. An article with a weighted layer, characterized in that it is made up of aggregate made of slag from a blast furnace.