Fibrous heat-insulating block and method for lining heated furnace-surface using same

A fibrous heat-insulating block used for lining a heated furnace-surface, the fibrous heat-insulating block comprising:

• a unit block formed by folding a fibrous heat-insulating blanket alternately to form mountain folds and valley folds, and stacking layers of the fibrous heat-insulating blanket under pressure, the unit block being used as a unit for lining application;
• a packing material including pressed surface contact parts each covering at least a part of each of pressed side surfaces of the unit block in a blanket stacking direction, and heated surface protection parts each being connected to the pressed surface contact parts and covering at least a part of a heated surface of the fibrous heat-insulating block heated in a state where a furnace is lined therewith, wherein a boundary between the pressed surface contact parts and the heated surface protection parts covers a corner formed by a pressed surface and a heated surface of the unit block;
• and
• a binding band keeping the shape of the unit block,
• wherein the heated surface protection parts of the packing material can be arranged on the same plane as the pressed surface contact parts after removing the binding band, and the heated surface protection parts of the packing material are provided with a handhold part,
• wherein the packing material comprises a pair of packing members arranged on the pressed side surfaces of the unit block in the blanket stacking direction, the packing members comprising the pressed surface contact parts, the heated surface protection parts connected thereto, and the boundary,
• wherein the packing material is made of a synthetic resin material, and has a thickness in a range of from 2 to 10 mm, and has a weight per unit area in a range of from 500 to 10,000 g/m2,
• wherein a tensile strength of the packing members is not less than 10 MPa and not more than 70 MPa,
• wherein each dimension of respective sides of the pressed surface contact parts is not less than 85% and not more than 97% of a dimension of a side of the pressed surface of the unit block,
• wherein the unit block is a cube or rectangular parallelepiped having a side of 200 to 400 mm, and a static friction coefficient of each of the packing members with the fibrous heat-insulating blanket is 0.1 to 1, and
• wherein, after removal of the packing material, the unit block of the fibrous heat-insulating block is in close contact with adjacent unit blocks of adjacent fibrous heat-insulating blocks due to a restoring force of the folded fibrous heat-insulating blanket in the blanket stacking direction, without forming a gap of a triangular joint.