The invention provides a low springback rate spraying and
coating material for thermal-state
blast furnace maintenance and a preparation method thereof. The spraying and
coating material comprises the following raw materials in percentage by weight: 30-50% of synthetic
mullite particles with the
diameter of 5-0mm, 30-50% of A-level flint clay particles with the
diameter of 5-0mm, 10-25% of synthetic
mullite powder of 200-325 meshes, 0-15% of A-level flint clay
powder of 200-325 meshes, 3-8% of
aluminate cement, 2-7% of clay
powder, 1-3% of silica micropowder of 2-5mu, 3-6% of aluminum
oxide micropowder of 5mu, 0-0.3% of
polyphosphate, 0-0.3% of
metaphosphate, 0.5-3% of lignosulphonate
calcium powder and 0-0.3% of organic
fiber,The invention has the outstanding characteristics that the springback loss is small, waste of raw materials in the process of construction is reduced on one hand, and the start-up operation of the furnace is facilitated on the other hand; and the spraying and
coating material provided by the invention meets the performance requirements on performances such as strength, scouring resistance, scouring and
permeation resistance,
rapid construction at 150-300 DEGC and the like, and is especially suitable for an unshaped
refractory for thermal-state
blast furnace lining maintenance. The invention has the outstanding characteristics that the springback loss issmall, waste of raw materials in the process of construction is reduced on one hand, and the start-up operation of the furnace is facilitated on the other hand; and the spraying and coating material provided by the invention meets the performance requirements on performances such as strength, scouring resistance, scouring and
permeation resistance,
rapid construction at 150-300 DEG C and the like, and is especially suitable for an unshaped
refractory for thermal-state
blast furnace lining maintenance.