JPS61134569A - Method of dehydrating powdered and granular body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a method for removing moisture from powder and granules of various ores including coal without using heat and without using high-speed mechanical force such as centrifugal force. This article concerns a method for removing it without removing it.

[Prior Art] Conventionally, mechanical and thermal methods have been used for dehydration and drying of powder and granular materials depending on the particle size of the powder and granular material. When the particle size of the powder material becomes extremely small, it becomes not only expensive but also extremely troublesome to handle. Generally, fine powder contains a large amount of water and has high viscosity and adhesiveness, so special measures are required to dehydrate it by any method.

[Purpose] The present invention solves the difficulties seen in conventional methods, and by using a hygroscopic resin, does not require a large amount of energy.
The object of the present invention is to provide a method for dehydrating powder and granular material that is economical in costs associated with resin costs.

[Structure] In the present invention, a hygroscopic resin powder is mixed with a powdery material having a wet surface or a slurry with a high solid concentration, and the moisture in the high-humidity powdery material is removed by the rotational movement of a drum. The present invention provides a method for dehydrating powder and granules, which is characterized by converting the powder into powder and separating dry powder and granules from a water-containing resin powder aggregate.

In the present invention, highly hygroscopic resin powder is directly mixed into water-containing fine powder, the water contained in the fine powder is absorbed into the resin, and then the water-containing resin and dry fine powder are separated, and the resin can be dried and reused or It can also be used to prevent fields from drying out by spraying them in a water-absorbing state. In addition, moisture in extremely fine powder, which is difficult to process using conventional dehydration or drying methods, can be easily removed using a simple device. Furthermore, since no heat is applied to the material to be dried and no large force field is applied, there is no deterioration or destruction caused by such materials, and the processing time is short, and the product does not form into lumps unless it has a particularly strong caking property, so the product can be pulverized. You don't have to. In addition, the amount of resin is extremely small compared to the material to be dried, and even if it adheres to the material to be dried and is carried away, there is almost no economic loss.After absorbing moisture, it becomes a continuum and the particle size increases, so it is difficult to separate it from the material to be dried. It is extremely easy to use and can be reused in dry conditions by gradually releasing moisture without heating.

The hygroscopic resin powder used in the present invention is a conventionally known one, and is generally composed mainly of sodium polyacrylate. The particle size of the solid particles in the powder and granular material and slurry used in the present invention is not particularly limited, but is generally 0.
．． It is 5 mm or less, preferably 2 to 3 mm or less. In addition, the particle size of the hygroscopic resin powder may be adjusted from 5 to 10 m as necessary.
It is adjustable up to m. This hygroscopic resin powder absorbs water and bonds with each other to form aggregate particles of increased particle size, for example 20-50 mm.

[Example] Next, an example of the present invention will be described using FIG. 1. The moisture-absorbing powder comes into contact with the water-containing fine powder 1, which is the material to be dried as a raw material, and the water transfers to the resin, but as time passes, fine particles and coarse particles, substances with heavy specific gravity and substances with light specific gravity become in a state of motion inside the drum. A type of segregation phenomenon occurs due to the difference in the amount of water, and the resin layer and the dried material layer separate. Therefore, when the material to be dried and the hygroscopic resin are mixed in the drum and given a rotational motion, the two functions of water movement and substance separation proceed simultaneously.

When the water-absorbed resin powder aggregates, if the amount of water absorption exceeds a certain level, they combine with each other to form granules, which become larger than the particle size of the material to be dried. ! 4 or the like, the dried material and the water-containing resin can be easily separated. Depending on the type of material to be dried, the particle size and specific gravity may be similar to that of the resin, and segregation may not occur within the rotating drum. In such cases, it is necessary to change the particle size of the resin or place the resin in a cloth bag. Add and stir to mix.

By adding the hygroscopic resin powder in this manner, it is possible to reduce the moisture content in the dried material by operating at room temperature without heating or the like, and therefore energy consumption can be significantly reduced. In addition, the resin powder mentioned above has extremely high water absorption capacity, and can absorb several hundred to 1,000 times its own weight in water, so if you roughly calculate that it will be in the dry material, the amount of resin used will be about 0.08%. It's all about quantity. The resin powder is 50% in bulk state.
It is a fine powder on the order of μm in size and is insoluble in water, so it does not react with the dried material except in special cases. Further, the particle size of the resin can be adjusted appropriately as necessary.

[Effects] According to the present invention, dehydration and concentration of water-containing fine powder, slurry, etc. can be performed with a relatively simple device, at low cost, and with low energy.
The cost required for conventional dehydration and drying can be significantly reduced, so if it is put into practical use, it can be expected to have an extremely large economic effect.

[Brief explanation of the drawing]

The drawing is a flow sheet of an embodiment of the present invention. 1... Dry matter hydrated fine powder 2...Hygroscopic resin powder

Claims (1)

[Claims] (1) A hygroscopic resin powder is mixed with a powdery material with a wet surface or a slurry with a high solid concentration, and the water in the high-humidity powdery material is transferred to the resin powder by the rotational movement of a drum. A method for dehydrating a powder or granule material, the method comprising separating a dry powder or granule material from a water-containing resin powder aggregate.