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Method for preventing adhesion and clogging of mineral raw material

A technology of mineral raw materials and raw materials, applied in chemical instruments and methods, dry solid materials, transportation and packaging, etc., can solve problems such as pipe blockage, coal transportation efficiency reduction, thermal power plant power generation efficiency reduction, etc., to achieve effective transportation and prevent adhesion and clogging effect

Inactive Publication Date: 2019-05-21
KURITA INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if it is not in the slurry state as described above, the coal in a wet state is likely to adhere to the contact surface of the piping (coal feeding pipe) that supplies the coal to the boiler, the belt conveyor, the chute, the hopper, and other conveying equipment. When solidification causes clogging of piping, etc.
[0007] In the case of such adhesion and clogging, in the past, it was necessary to stop the operation of the production line and take out the clogged coal, or dismantle the conveying equipment to eliminate the clogging and clogging, which would reduce the coal conveying efficiency and further cause thermal power plants In such a situation that the power generation efficiency decreases

Method used

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  • Method for preventing adhesion and clogging of mineral raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Add 0.1% by mass of "KURILINE S-200" (manufactured by Kurita Kogyo Co., Ltd.; sodium polyacrylate) as a superabsorbent resin to 1,000 g of wet coal (moisture content: 15.5% by mass, particle size: 2 mm or less), and stir evenly Mixing, raw material mixture samples were prepared.

[0063] Used on the upper part of the electric sieve ("ANF-30", manufactured by Nippon Science and Technology Co., Ltd.) instead of the sieve, a simulated hopper (inlet: 200mm×200mm, discharge port: 30mm×50mm) is installed in the shape of an inverted quadrangular pyramid; made of steel ) vibration test device, the adhesion evaluation test of the raw material mixture sample was carried out.

[0064] Adhesion evaluation was carried out by putting the prepared raw material mixture sample into the dummy hopper of the vibration tester, and measuring the discharge time from the time of putting it in until it fell onto the lower tray of the vibration tester.

[0065] In addition, regarding the moistu...

Embodiment 2～4

[0068] The discharge time of the raw material mixture sample was measured in the same manner as in Example 1 except that the water content of coal and the addition amount of the superabsorbent resin were changed as shown in Table 1 below.

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Abstract

Provided is a method for easily preventing adhesion and clogging of wet mineral raw material, such as coal, iron ore, dust, coke, or limestone, in transportation equipment, such as piping. This methodcomprises a step for obtaining a raw material mixture with superabsorbent resin in contact with the wet mineral raw material by spraying superabsorbent resin on the wet mineral raw material before orduring the transportation thereof using a belt conveyor. Thus, the material mixture is transported using the transportation equipment and the adhesion and clogging of the mineral material in the transportation equipment is prevented.

Description

technical field [0001] The invention relates to a method for preventing adhesion and clogging of wet mineral raw material in conveying equipment. Background technique [0002] When the ironmaking raw materials are transported to the ironworks by the bulk carrier, the ironmaking raw materials in the lower part of the accumulation are in a slurry state due to the water accumulated on the floor of the ship's warehouse. In addition, when stored in the raw material yard in the state of being piled in the open air, it may become a slurry state due to water such as rainwater or sprinkler water for dust prevention. [0003] Such mineral raw material slurry such as ironmaking raw materials in a slurry state is a muddy fluid substance with a lot of water content, so there is a problem that it is difficult to carry out from ship warehouses and raw material yards. [0004] In view of such a problem, the present inventors proposed a transportation method, that is, a polymer absorbent is...

Claims

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Application Information

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IPC IPC(8): B65G69/20C22B1/00F26B5/16
CPCC22B1/00B01F23/60B01F35/71B01F35/71705F26B5/16B65G69/20B65G2201/045
Inventor 吉川崇森胜己
Owner KURITA INDUSTRIAL CO LTD
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