GB/T 33785-2017Specification for high radiative coating energy-saving technology (English PDF)

3.1 High radiative coating energy-saving technology

The energy-saving technology to improve the heat efficiency of furnace by the high radiative coating material through finely ground to a medium diameter of less than 20µm; is coated on the surface of base material through interface modified treatment; and forms the high-temperature-oxidation-resistant coating firmly combining with base.

3.2 High radiative coating material

The materials composite made between the high emissivity powder and high temperature binder.

3.3 Heat storage capacity

Under the setting temperature and specified time conditions, the heat absorbed by the heat-retainer.

5.1 Applicable principle

The application of high radiative coating energy-saving technology shall satisfy the following conditions.

a) The base surface shall be solid, hard to peel off, no glaze, no oil stains;

b) Coating shall not contact liquid, solid materials or water vapor;

c) Working temperature of coating shall be at 300°C~1700°C.

5.2 Applicable furnace

5.2.1 Common furnace

The types and coating parts of the common furnace adopting high radiative coating energy-saving technology can refer to Table 1.

8.1 Test of heat storage capacity

It shall be tested as per GB/T 31934.

8.2 Test of energy-saving effect

a) Compared the furnace adopting high radiative coating energy-saving technology with the furnace not adopting high radiative coating energy-saving technology but has the same furnace type, the same working condition.

b) The heat balance test of blast furnace hot-blast stove shall be implemented as per the provisions of GB/T 32287; other furnaces shall refer to GB/T 32287 and YB/T 4313 to test.

c) The energy-saving effect of high radiative coating energy-saving technology shall be calculated as per Formula (1). Where. eta - energy-saving rate of high radiative coating energy-saving technology;

Bw - fuel consumption per unit production of the furnace not adopting high radiative coating energy-saving technology, in m3/m3, or m3/t, or t/t;

Bt - fuel consumption per unit production of the furnace adopting high radiative coating energy-saving technology, in m3/m3, or m3/t, or t/t;

NOTE: when furnace product and fuel are both gas, the unit is m3/m3; when furnace product is solid or liquid, while fuel is gas, the unit is m3/t; when furnace product is solid or liquid, while fuel is solid or liquid, the unit is t/t. […]