Steel Rolling Furnace Refractory Coating Application

Environmental exposure

The documented setting is a refractory-lined furnace used in steel rolling. A furnace-service context is supported, but the available evidence does not establish a publishable operating temperature for the pictured work.

Operating conditions

The work record covers access to the furnace interior, protection of non-work surfaces and preparation of the refractory lining before spraying. It does not provide a reliable commissioning date, service-duration record or measured efficiency baseline.

Observed condition and failure signs

The photographs support visible deposits and damaged or irregular refractory surfaces. They do not establish deposit chemistry, quantified wear or coating failure on treated rollers.

Problem analysis

Loose material, dust, oil and other contamination can prevent uniform contact with an irregular refractory lining. The application therefore depends on defining a sound work surface and protecting adjacent equipment that is outside the coating scope.

Problem to address

Deposits and an irregular or deteriorated refractory surface are visible in the source photographs. Their composition and formation mechanism were not analytically verified, so the page does not treat the deposits as a measured anti-coking or wear result.

Protection objectives

Create a clean, sound refractory surface and controlled spray coverage across the documented furnace-lining work area. The objective is stated without inferring an efficiency or durability outcome.

System selection rationale

The historical record describes a primer stage followed by ceramic/infrared coating stages. It does not establish equivalence to DY-25, DY-26 or any other current DAYU-X product; current selection requires a separate condition and compatibility review.

Surface preparation

Protect surfaces outside the work scope, then remove loose refractory material, oil, dust and other contamination from the lining. Confirm that the remaining refractory surface is sound enough for the approved application procedure.

Application workflow

Isolate and protect non-work equipment, prepare the refractory lining, complete the documented primer stage, apply the ceramic/infrared stages by spray, and inspect visible continuity across the treated lining. No unreliable project date or measured outcome is added.

Curing and return-to-service control

Keep the treated refractory surface protected from contamination and mechanical damage while it cures under the approved system instructions. No return-to-service result or operating-life evidence is inferred.

Inspection should verify removal of unstable material, cleanliness of the refractory surface, protection of non-work areas and continuous spray coverage across irregular lining details. Design information in the historical report is not presented as a current product specification or signed as-built result.

Inspection and maintenance

Later furnace inspections should record changes at the same lining areas, including deposits, cracking, spalling or local coating discontinuity. No anti-coking performance, energy saving, wear improvement or service-life extension is claimed.