公开(公告)号：JPH02275752A

公开(公告)日：1990-11-09

申请号：JP9162289

申请日：1989-04-11

Applicant: AGENCY IND SCIENCE TECHN

Inventor： OTAKE TAKESHI ,  UCHIDA KUNIO ,  KAWAMURA MITSUTAKA ,  OKUBO TEIJI ,  IGASAKI FUMIKAZU

IPC: C04B35/00 ,  C04B35/18

Abstract: PURPOSE:To obtain feedstock for mullite ceramics in low costs by forming a mixture of deironated and decarbonized coal ash and alumina and firing the products. CONSTITUTION:Alumina is added to deironated and decarbonized coal ash, the mixture is formed and fired to give the subject material. The ash is reduced less than 2wt.% in iron and less than 0.5wt.% in carbon. The deironation treatment is carried out by using a magnetic separator, when needed, followed by treatment with hydrochloric acid or sulfuric acid. The decarbonization is effected in order to reduce carbon residue (including unchanged coal) by calcinating at 800 to 900 deg.C after deironation. Unsatisfactory pretreatment forms foams during the firing of the formed products. The residual iron causes colored (red brown) products with market value reduced.

公开(公告)号：JPH01122944A

公开(公告)日：1989-05-16

申请号：JP28144987

申请日：1987-11-06

Applicant: AGENCY IND SCIENCE TECHN

Inventor： OTAKE TAKESHI ,  KAWAMURA MITSUTAKA ,  UCHIDA KUNIO

IPC: C04B18/10 ,  C04B14/12 ,  C04B18/02 ,  C04B18/08

Abstract: PURPOSE:To obtain the above molded product for burning hardly breaking or pulverizing in burning in the production of artificial light-weight aggregate and having improved mechanical strength, by applying an organic binder to the surface of the molded product of an inorganic material containing an inorganic binder. CONSTITUTION:An inorganic binder consisting of bentonite, clay, etc., is added to an inorganic material consisting of coal ash, garbage burnt ash, etc., at a ratio of 2-10wt.% and the blend is humidified to mold to a desired form. Furthermore, average particle size of the inorganic material is normally

公开(公告)号：JPS62252354A

公开(公告)日：1987-11-04

申请号：JP9493486

申请日：1986-04-25

Applicant: AGENCY IND SCIENCE TECHN ,  MITSUBISHI HEAVY IND LTD

Inventor： KAWAMURA MITSUTAKA ,  OTAKE TAKESHI ,  UCHIDA KUNIO ,  SASAKI ATSUSHI ,  NOHARA HIDESHI ,  ITANO SHIGEO

IPC: C04B18/08 ,  C04B14/02 ,  C04B14/12

公开(公告)号：JPH03131551A

公开(公告)日：1991-06-05

申请号：JP26820689

申请日：1989-10-17

Applicant: AGENCY IND SCIENCE TECHN ,  MITSUBISHI HEAVY IND LTD

Inventor： KAWAMURA MITSUTAKA ,  UCHIDA KUNIO ,  OTAKE TAKESHI ,  FUJIWARA KUNIHISA ,  ITANO SHIGEO ,  KAI TOSHIO ,  SERA TOSHIKUNI

IPC: C04B18/10 ,  C04B18/02 ,  C04B35/00

Abstract: PURPOSE:To obtain a high-quality artificial light-weight aggregate in a high yield by measuring softening characteristics of coal ash which becomes a main raw material and deciding a burning temperature based on the measured data in burning of a granulated article of coal ash. CONSTITUTION:In a burning method of a granulated material of coal ash carried out by laminating the granulated article of coal ash on a moving grate of a burning furnace isolated from atmosphere and burning the granulated article while forming a stream passing through the layer from the upper side to lower side, softening characteristics of coal ash which becomes a main raw material of the granulated article are measured and the granulated material is burned at a temperature capable of giving shrinkage ratio of the granulated article corresponding to 5-60% of maximum shrinkage ratio (shrinkage ratio in softening temperature).

公开(公告)号：JPH0193449A

公开(公告)日：1989-04-12

申请号：JP24876487

申请日：1987-09-30

Applicant: AGENCY IND SCIENCE TECHN ,  Y S ENG KK

Inventor： OTAKE TAKESHI ,  KAWAMURA MITSUTAKA ,  UCHIDA KUNIO ,  YOKOYAMA MASAHIRO

IPC: C04B18/30

Abstract: PURPOSE:To obtain an artificial light-weight aggregate satisfying excellent economicity as well as light aggregate weight, by adding inorganic powder having low apparent specific gravity to a main raw material composed of a clay mineral waste having self-sustaining combustibility, forming the mixture into a prescribed form and subjecting the product to self-sustaining combustion in a vertical kiln. CONSTITUTION:100pts.wt. of a main raw material composed of a clay mineral waste having self-sustaining combustibility (e.g. deposited sludge or coal ash) optionally added with 1-3% of pulp spent liquor or dust coal is added with 2-10pts.wt. of inorganic powder having low apparent specific gravity (

公开(公告)号：JPH06199581A

公开(公告)日：1994-07-19

申请号：JP3207191

申请日：1991-01-30

Applicant: AGENCY IND SCIENCE TECHN ,  UCHIYAMA ADVANCE KK ,  TOKYO GAS CO LTD

Inventor： KAWAMURA MITSUTAKA ,  IGASAKI FUMIKAZU ,  UCHIDA KUNIO ,  OTAKE TAKESHI

IPC: C04B38/00 ,  C04B18/12 ,  C04B41/85

Abstract: PURPOSE:To enhance the commodity value of an inorg. expanded compact produced using expandable inorg. powder as starting material by color-fully coloring the surface of the compact. CONSTITUTION:Expandable inorg. powder is compacted into a required shape, the surface of the resulting compact is coated with an inorg. colorant and the compact is expanded by firing at >=1,000 deg.C to produce the objective surface- colored inorg. expanded compact with a sintered layer of the inorg. colorant on the surface.

公开(公告)号：JPH03131552A

公开(公告)日：1991-06-05

申请号：JP26820789

申请日：1989-10-17

Applicant: AGENCY IND SCIENCE TECHN ,  MITSUBISHI HEAVY IND LTD

Inventor： KAWAMURA MITSUTAKA ,  UCHIDA KUNIO ,  OTAKE TAKESHI ,  FUJIWARA KUNIHISA ,  ITANO SHIGEO ,  KAI TOSHIO ,  SERA TOSHIKUNI

IPC: C04B18/10 ,  C04B18/02 ,  C04B35/00

Abstract: PURPOSE:To obtain a high-quality artificial light-weight aggregate in a high yield by each setting an upper-limit burning temperature from water absorbing characteristics of an artificial light-weight aggregate and a lower-limit burning temperature from an unburned carbon amount contained in the artificial light-weight aggregate and burning a granulated article of coal ash at the set burning temperatures. CONSTITUTION:In burning of a granulated article of coal ash for laminating a granulated article of coal ash containing a coal content on a moving grate of a burning furnace isolated from the air and then producing an artificial light-weight aggregate by burning action with an oxygen-containing gas passing through the layer from upper side to the lower side, burning is carried out as follows: Lower-limit burning temperatures is set from water-absorbing characteristics of the artificial light-weight aggregate which is a burned article of the granulated article and an upper-limit burning temperature is set from an unburned carbon amount contained in the artificial light-weight aggregate and the granulated article is burned at the set temperatures. An optimum burning temperature area characteristic of each granulated article is precisely grasped and control of burning temperature, i.e., an O2 concentration control of a supply gas for burning is facilitated by measuring absolute dry specific gravity specified in JIS, an unburned carbon amount (carbon amount reduced on strong heating) contained in the artificial light-weight aggregate and water absorption important from the viewpoint of application of light-weight concrete. As a result, a high-quality artificial light- weight material can be produced in a higher yield.