MOLTEN METAL PLATING FURNACE, SYSTEM FOR PRODUCING AND METHOD FOR PRODUCING PLATED PRODUCT, AND METAL PLATED STEEL TUBE OBTAINED BY MEANS OF SAID METHOD FOR PRODUCING

摘要

[Problem] To provide: a molten metal plating furnace that can increase plating quality and work efficiency; a system for producing and method for producing a metal plated product; and a metal plated steel tube obtained by means of the method for producing. [Solution] The system for producing has at least one plating implementation unit that performs molten metal plating of a plating processing subject, and at least one plating implementation unit has a plating bath and a heating device for heating the plating bath, wherein in the heating device, an array of fuel filling openings and an array of air filling openings are formed that are facing in a manner so as to discharge air and fuel to a combustion region in common along a combustion chamber, the effective opening cross-sectional size of at least the majority of the openings of at least one of the opening arrays can be adjusted by means of an adjustment mechanism for adjusting the extent of a medium filling opening array, and when the size of both opening arrays can be adjusted, individual adjustment of the arrays is possible.

主权项

1. A molten metal plating furnace comprising:
a plating bath; an inner wall disposed outside of the plating bath; a heat-resistant outer wall in a substantially rectangular shape made of a short wall portion and a long wall portion; a heating chamber surrounded by the inner wall and the heat-resistant outer wall; and a heating device disposed on at least one place of the heat-resistant outer wall, wherein the heating device is the combustor (10) including a combustion chamber (12) extending regularly about a central axis (14) of which at least part of the axially extending wall (26, 64, 66) is formed with an array (22) of fuel charging orifices (28.1) and an array (24) of air charging orifices (28.2) facing to discharge fuel and air into a common combustion zone along the combustion chamber (12) with the sizes of the fuel charging orifices (28.1) standing in an appropriate relationship to those of the air charging orifices (28.2) to achieve an effective combustion reaction, a progressively constricted combusted medium discharge nozzle (16) for accelerating the discharge velocity of combusted medium, and a combustion fuel and air supply disposition (20, 18) opening respectively into the fuel charging orifice array (22) and the air charging orifice array (24) each being connectable to a supply of the relevant medium, whether fuel or air, while the combustion chamber (12) is exposable to igniting means (34) for igniting a combustible mixture once the combustor is in use; characterised in that the effective cross sectional orifice size of at least the majority of orifices (28) of at least one of the orifice arrays (22, 24) is controllably adjustable by means of an adjustment mechanism (30, 44, 46, 48, 58, 68, 70, 76) for adjusting the extent of the appropriate medium charging orifice array (22, 24) though enabling the independent adjustment of the arrays in the case of the sizes of both the orifice arrays being adjustable.