Technology for preparing porous heat insulation plates by sintering iron tailings

Abstract

The invention provides technology for preparing porous heat insulation plates by sintering iron tailings, comprising the following steps: breaking and then grinding shale and the iron tailings, sieving and measuring the ground shale and iron tailings to ensure the fineness is 20-80mu m; adding toughening agents, cosolvents and foaming agents into the ground shale and iron tailings in proportion and mixing the above materials, adding water to the mixture for prilling, after natural drying, distributing raw material balls on the moulds, then placing the moulds into a kiln to be sintered by way of sectional heating, and finally stacking the products after demoulding the cooled plates. The technology utilizes a great number of iron tailings with the highest addition up to 40%, saves energy andis beneficial to environmental protection. The volume density and pore sizes and distribution of the plates can be controlled by the addition and sintering schedules of the foaming agents. The prepared plates enjoy uniform pore distribution, high strength and good heat preservation and insulation properties.

Description

technical field

[0001] The invention belongs to the technical field of solid waste utilization, and relates to a preparation process of a porous heat preservation plate, in particular to a preparation process of a sintered iron tailings porous heat preservation plate. Background technique

[0002] As of 2005, the national building stock was 40 billion m 2 , according to the medium and long-term development plan for 2006-2020, 30 billion m 2 Various buildings, with an average annual construction of 2 billion m 2 , and the demand for wall materials is huge, reaching 800 billion pieces (equivalent to ordinary bricks). In recent years, in order to protect cultivated land, protect the environment, and save energy, the state has issued relevant policies that will gradually ban the use of traditional clay sintered wall materials; and in the field of mineral processing, the amount of mineral processing waste slag discharged has reached 5 to 6 billion tons, and each year With a gr...