JPS60145334A - Method for caking metallic powder, metallic abrasive powder, dust or the like before regenerating metal - Google Patents

Abstract

PURPOSE:To facilitate handling and to prevent the generation of dust by adding slaked lime, a degreasing agent, cement, etc. to metallic powder, metallic abrasive powder and dust of the powders according to water-soluble or -insoluble oil contained in the powders and by caking them. CONSTITUTION:Metallic powder, metallic abrasive powder and dust of the powders as starting materials are kneaded with a binder such as cement or sodium silicate and water. When water-soluble oil is contained in the starting materials, the starting materials are mixed with slaked lime or dolomite plaster, and the binder is added to the mixture. When water-insoluble oil as well as water-soluble oil is contained, a degreasing agent or lumps of oil absorbing ceramics are added to remove the insoluble oil from the starting materials, the starting materials are mixed with slaked lime or dolomite plaster, and said binder is added to the mixture. The mixture is then kneaded with water, charged into a frame, vacuum-dehydrated, and dried.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for solidifying metal powder, metal polishing powder, collected dust, etc. for metal recycling.

Fine powders such as metal powder, metal polishing powder, and dust collected from factories are processed as they are in the form of dust, but in order to recycle them, they must be solidified, which is inconvenient to handle, and is particularly harmful to pollution. From the viewpoint of prevention, it is desirable to solidify into a block-like mass.

The more expensive the metal, the more valuable these metal powders are for recycling. It is better to solidify it into blocks when transporting and charging it to the regeneration furnace.

The present invention focuses on this point, but some metal powders, metal polishing powders, and dust particles contain oil, and some oils can be mixed and separated in water, while others are insoluble in water. Some contain oil. In any case, metals that have value after being rehabilitated should be reused.

The present invention has been made for this purpose, and metal powder, metal polishing powder, and dust collection dust (hereinafter referred to as raw materials) can be used in cases where they do not contain oil or contain oil, but the oil is eluted into water. This was done by taking into account three cases, namely the two cases of the woman and the squid.

First, raw material powder that does not contain oil is mixed with cement and sodium silicate as a binder, mixed with water, placed in a frame, covered with a lid that allows vacuum suction from the top, and dehydrated in a vacuum to form the product. This is dried and solidified.

~ When using raw materials containing oil that mixes with water, add slaked lime or dolomite plaster, knead with water, add cement or a binder such as sodium silicate, shape in a frame, dehydrate by vacuum suction, and remove from the frame. Rinse out and dry,
It is shaped like a block.

In addition, in the case of raw materials that contain oil that is poorly miscible with water, after mixing with a degreasing agent or oil-absorbing ceramic lump and leaving it to stand, the oil is adsorbed on the raw material and separated as a raw material. Mitonoraster is added to the cement, a binder such as sodium silicate is added, the mixture is kneaded with water, and the mixture is placed in a frame and dried after vacuum dehydration.

Examples are shown below to clarify the gist of the invention.

Example 1 Iron powder dust collection 200 Kg Portland cement 27.3 K9 water 29.3
K9 is kneaded in a kneading machine, put into a rectangular frame, sealed with a lid capable of vacuum suction, and water in the mixture is separated by vacuum suction. The block-shaped molded material inside the frame has a moisture content of about 20 parts. This is further dried.

Example 2 The same raw materials as in Example 1 were used, except that a 20% aqueous solution of sodium silicate was used instead of Portland cement.

Iron powder dust collection dust 200 K9 Sodium silicate 20% solution 74 to 9 The following operation is carried out in the same manner as in Example 1.

Example 3 Ferronickel polishing powder with oil content of about 20 parts 200 Kq
Slaked lime 22:2 Aqueous solution of 20% sodium silicate 21.7 Kg (oil content can be eluted in water) After mixing, process in the same manner as in Example 1.

Example 4 10 parts of ferronickel polishing powder containing approximately 20% oil Degreaser Lion, New Cleaner (manufactured by Lion Oil Co., Ltd.)
Degrease and separate with 100 parts of a 3% aqueous solution at 50-90°C.

with 200Kg Slaked lime 22 to 9 Water 21.7 Kq After crosstalk, the same process as in Example 1 is carried out.

Example 5 To 200 parts of ferronickel polishing powder containing 20% of water-insoluble oil, an appropriate amount of oil-absorbing ceramic lump (Filton, trade name, manufactured by Filton) was added and stirred for several hours, so that the oil content was absorbed into the ceramic lump. Therefore, the material from which this ceramic lump was removed was used as a raw material and treated in the same manner as in Example 3.

In this way, metal powder, metal polishing powder, collected dust, etc., are formed into blocks, dehydrated, and dried, making them easy to transport and feeding into the blast furnace, and are powder-like and do not float in the air, reducing pollution. It is something that can be eliminated.

Patent applicant: Todoroki Kogyo Co., Ltd.

Claims (3)

[Claims] (1) Metal powder, metal polishing powder, or metal polishing powder, which is characterized by using cement or sodium silicate as a binder for metal powder, metal polishing powder, or these dust powder raw materials, kneading it with water, placing it in a frame, vacuum dehydration, and drying. A method of solidifying dust, etc. for metal recycling. (2) Metal regeneration of metal powder, metal polishing powder, dust, etc. according to claim 1, which is obtained by mixing slaked lime or dolomite shiraster with the above raw material containing water-soluble oil and adding the above binder thereto. How to solidify for use. (3) The metal powder, metal polishing powder, dust, etc. according to claim 2 is prepared by adding a degreasing agent or an oil-absorbing ceramic lump to the above-mentioned raw material containing oil that does not dissolve in water, and degreasing and separating the raw material. How to solidify for recycling.