Production process of hollow brick and porous brick from coal gangue

Abstract

The invention relates to a production process of a hollow brick or a porous brick from coal gangue. The hollow brick or the porous brick is good in heat preservation performances, but is complex in production process, and meanwhile, qualities of the bricks burned through different processes are quite different. The production process includes the steps of: (1) primary crushing; (2) secondary crushing; (3) aging: aging raw materials after the secondary crushing for 1-1.5 months; (4) moulding; (5) drying; and (6) calcination: pulling dried green bodies of the bricks out and directly calcining the green bodies in a calcining kiln. In the process, a one-time palletizing and burning process is employed, wherein the moulded green bodies are directly palletized on a kiln car and then are subjected to continuously drying and calcination, so that an operation of palletizing the moulded green bodies on a drying car and then unloading the dried green bodies can be avoided, thereby simplifying the process. The production process reduces required workers, is convenient for production management and can increase labor productivity.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a production process of coal gangue hollow bricks and porous bricks. Background technique [0002] In northern my country, heating energy consumption in winter accounts for almost 30%-40% of the total energy consumption. Therefore, reducing heating energy consumption is a very important issue. Usually, two methods are used to reduce heating energy consumption. One is to improve the efficiency of various heating equipment, and the other is to improve the insulation performance of buildings, increase heat resistance, and reduce heat loss. [0003] Generally speaking, the heat dissipated by the wall and roof reaches 60% to 70% of the heat dissipation of the house, and the area of ​​the wall is several times larger than the area of ​​the roof. The reduction of building energy consumption must be focused on improving the heat preservation of the outer structure of the house....

AI Technical Summary

Problems solved by technology

[0004] Hollow bricks or porous bricks have the characteristics of good thermal insulation performance, but the production process of hollow bricks and porous bricks is more complicated, and most of them use secondary code firing, the product qualification rate is low, the cost is high, and the brick body fired by different processes The quality is also very different. For example, there are many differences in the production of hollow bricks fired with coal gangue, which leads to great differences in the quality and production cost of bricks.