A kind of peridotite smelting pellet

Abstract

The invention provides a pure peridotite smelting pellet. The peridotite smelting pellet comprises the following components in parts by weight: 94-97 parts of refined iron mine powder, 3.0-3.5 parts of forsterite powder, 0.5-1.5 parts of palygorskite, 0.2-0.3 part of sodium nitrite, 0.2-0.3 part of refractory cement and 0.2-0.3 part of corncob powder, wherein the particle sizes of the components are below 100 micrometers, and the particle size distribution range of the forsterite powder is as follows: the forsterite powder with the particle size being 50-100 micrometers accounts for 20-50%, the forsterite powder with the particle size being below 1 micrometer accounts for 5-15%, and the forsterite powder with the particle size being 1-50 micrometer accounts for 35-65%.

Description

technical field [0001] The invention relates to a production technology of smelting pellets. Background technique [0002] Pellets are balls made of mineral powder such as iron ore powder with uniform particle size and sufficient strength. When making pellets, first add appropriate amount of water and binder to the mineral powder, and then make it into green balls through a pelletizer, then dry the green balls, preheat them, and roast them in an oxidizing atmosphere to make pellets. into pellets or called pellets. [0003] Green balls contain a certain amount of water. During the drying process, the temperature of sintered green balls is too high, and the water in the green balls diffuses from the inside to the outside through the steam. When there is too much steam, it is too late to diffuse to the surface of the green balls, resulting in When the steam pressure is too high, and the steam pressure inside exceeds the radial and tangential tensile strength of the dry surfac...

AI Technical Summary

Problems solved by technology

[0003] Green balls contain a certain amount of water. During the drying process, the temperature of sintered green balls is too high, and the water in the green balls diffuses from the inside to the outside through the steam. When there is too much steam, it is too late to diffuse to the surface of the green balls, resulting in When the steam pressure is too high, and the steam pressure inside exceeds the radial and tangential tensile strength of the dry surface layer, the pellets will burst and the structure of the pellets will be destroyed. If the temperature of the sintered green balls is too low, although the medium The flow rate is slow, and the dried green pellets are not uniformly broken, but the output of this sintering method is relatively low, which increases the cost of making pellets