Title:
廃酸処理用中和剤およびその製造方法
Document Type and Number:
Japanese Patent JP4739570
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make a neuralizing agent inexpensively producible and to make the sulfur content in a sludge generated by the neutralization of waste acid reducible. SOLUTION: A neutralizing agent for treating waste acid which contains 25-70% of MgO, 10-40% of CaO, 3-10% of Al2 O3 , 3-15% of SiO2 , and 3-25% of C and is composed of powdery particles and in which the percentage R (=W1/WT) of the mass W1 of particles 0.1-75 μm to total mass WT of the particles is at least 70% is produced by a method in which a magnesia refractory material after being used in a metal melting furnace, a metal smelting furnace, and a metal container is used as a raw material, crushed, base metal- separated, and classified.
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Inventors:
Kenichi Katayama
Application Number:
JP2001114831A
Publication Date:
August 03, 2011
Filing Date:
April 13, 2001
Export Citation:
Assignee:
Nisshin Steel Co., Ltd.
International Classes:
B09B3/00; B03B5/28; C02F1/66; B03B7/00; B03B9/06; B03C1/00; B09B5/00
Domestic Patent References:
| JP7102237A | ||||
| JP6320172A | ||||
| JP9328354A |
Attorney, Agent or Firm:
Keiichiro Saikyo
Minetarou Hirose
Minetarou Hirose