JPS5827158B2 - Consolidation relaxation method for powdered ore slurry - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for deconsolidating grain ore slurry.

Iron ore powder is loaded into the cargo hold in the form of a slurry at the loading port, but during the ship's berth and voyage after loading, it settles due to the difference in specific gravity with water, and is deposited in a dehydrated, consolidated state.

Iron ore powder in such a consolidated pile is hard and therefore cannot be easily unloaded by club packets.

In addition, the iron ore powder in the consolidated pile is not only hard, but also adheres to the ship's side and bottom walls, so even if it is possible to unload with a grab bucket, it will only be at the bottom of the batch and on the ship's bottom wall. Therefore, complete unloading cannot be expected.

The present invention has been developed based on the unloading of reslurry as described above, and its purpose is to alleviate to some extent the consolidation of the consolidated coarse ore deposited inside the ship's hold prior to reslurry unloading. The purpose of this study is to propose a method for re-slurrying the slurry by subsequently spraying it with high-pressure fluid such as jet water.

Embodiments of the present invention will be described below based on illustrative drawings.

In FIG. 1, 1 is a grain ore slurry carrier, 2 is its hold, and a double bottom 4 is used on the bottom wall 3 of the hold to recover grain ore slurry that has been re-slurried, and is also connected to a landing pipe 5. A well 6 for feeding is provided.

Inside this well 6 is a jet water spray nozzle 6A for spraying jet water onto the consolidated coarse ore 7 that has been deconsolidated by the method of the present invention, which will be described later, to re-slurry it.
is installed.

Such a jet water injection nozzle 6A is installed not only in the well 6 but also in appropriate locations such as the vertical bulkhead 2A, the horizontal bulkhead (not shown), or the bottom wall 3 of the hold 2, so as to prevent the accumulation of water from accumulating inside the hold 2. Jet water can be injected to all of the consolidated coarse ore 7.

Inside the hold 2, spiral heating pipes 20 are disposed in multiple stages, vertically and vertically. 21 is a heating medium supply pipe, and 22 is a drain branch pipe.

In the above configuration, prior to re-slurrying and unloading of the consolidated coarse ore 7, by passing a heating medium such as steam through the heating tube 20, the water contained in the consolidated coarse ore 7 is heated and evaporated, As shown by arrow Y in the figure, the steam flows while staying in the interparticle gaps inside the consolidated coarse ore 7, rises while relaxing the degree of consolidation, and is released into the atmosphere.

FIG. 2 shows an embodiment of the function, in which a heater 30 is disposed on the bottom wall 3 of the bottom wall, and the water contained in the consolidated grain ore 7 is removed by the heater 30. This is made into steam, which is retained and distributed in the consolidated grain ore 7.

[Arrow Z]. The heater 30 may be arranged on the back surface of the bottom wall 3.

As shown in the figure, a cover plate 31 that covers the upper part of the heater 30
Alternatively, by providing a groove in the bottom wall 3 and installing a heater in the groove, the heater 30
It is possible to prevent the consolidated grain ore 7 from adhering to the surface.

After performing consolidation relaxation as described above, in each of the above examples,
Jet water is injected from a jet water injection nozzle 6A installed in the well 6 and a jet water injection nozzle (not shown) installed in the pond, and is sprayed onto the consolidated grain ore 7 that has been eased in consolidation to form a reslurry. The resulting slurry is landed through a well 6 and landing piping 5.

As is clear from the above description, the present invention heats the consolidated grain ore to evaporate its moisture content before reslurrying the consolidated coarse ore deposited inside the ship's hold. By circulating steam, it is possible to forcefully infiltrate the spaces between coarse ore particles, and at the same time, the adhesive force between grain ore flow particles can be relaxed by the heating action, so the consolidation of grain ore can be extremely achieved throughout the entire grain. can be effectively alleviated.

Therefore, it effectively acts as an auxiliary role for reslurry formation using jet water.

In addition, the present invention collapses the consolidated state by heating the water contained in the consolidated grain ore itself to vaporize and expand it, and in this way, the vapor expansion obtained by expanding the water as steam Using power,
Since the steam is infiltrated against the pressure of the consolidated grain ore, there is no need to apply a large ejection pressure to the fluid as in the case of ejecting the fluid into the consolidated coarse ore.

[Brief explanation of drawings]

The drawings show an apparatus for carrying out the invention, and FIGS. 1 and 2 are cross-sectional front views of different embodiments. 2... Ship hold, 7... Consolidated grain ore, 20.
... Heating tube, 21 ... Heating medium supply pipe,
22... Drain branch pipe, 30... Heater, Y, Z... Steam staying and circulating inside the consolidated coarse ore 7.

Claims (1)

[Claims] 1. Prior to re-slurrying and unloading the consolidated coarse ore deposited inside the ship's hold, steam is caused to flow inside the consolidated coarse ore by heating the consolidated coarse ore to evaporate the moisture contained therein. Consolidation relaxation method for grain ore slurry.