CN1311087A

CN1311087A - Method for producing colliery wastes brick

Info

Publication number: CN1311087A
Application number: CN 00110917
Authority: CN
Inventors: 刘小生; 王玉军
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-02-29
Filing date: 2000-02-29
Publication date: 2001-09-05

Abstract

This invention provides a making method of gangue brick, which is to pulverize gangue; in the pulverized material, the granularity of 50-60 mesh fine powder occupies over 60% and the largest grain is below 2 mm; the well-pulverized gangue powder is loaded into a mixer, water is added and the mixture is stir-mixed uniformly, the quantity of water addition occupies 6-9% of the total wt. of gangue powder; the wall-stirred material is fed into a brick presser to be pressed into shape, and the formed green brick is directly placed in a roller kiln to be turnt for producing the finished product. The present method is rotioned in process design and simple in operation, saves energy source, comprehensively utilizes waste matter, protects farmland, occupies less land and reduces investment.

Description

A kind of preparation method of colliery wastes brick

The present invention relates to a kind of brick-making method, specifically a kind of preparation method of utilizing the industry and mining discarded object to make colliery wastes brick for building for raw material.

Development along with society, the development speed in large, medium and small city and cities and towns is more and more faster, the population in cities and towns constantly increases, thereby building industry is lasting, building industry development driven the development of building materials industry, in the past few years, use clay to produce building brick in large quantities and destroyed arable land, a lot of good farmlands artificially.

At present, China's brick and tile output accounts for the No. 1 in the world.In quite long from now on period, in city and town and country village build, brick and tile with the competition of New Building Materials in, remain important construction material, so the production technology of research brick and tile develops and reforms this ancient wall roofing construction material, still has suitable significance.

The firing time of the purpose of this invention is to provide that a kind of technology is simple, the use amount that reduces clay, the cold of shortening adobe being shone time and adobe, in order to reduce brick field to the destruction of ploughing, adhere to reducing and coolly shine adobe the pollution of the requirement of factory site area, the consumption that reduces the energy and industrial residue to environment.

The objective of the invention is to realize in the following manner, from the national conditions of China and the actual conditions of building, Tu Yuan, the energy, process equipment and habits and customs according to the locality, suit measures to local conditions, employing utilizes mud stone and shale, gangue and small amount of clay to be raw material, by the dry method flour, semidry method forcing press compression moulding technology.(the wet method extrusion molding of prior art, moisture content is at 15-17%.The adobe moisture content of dry method compression moulding is at 6-10%) adobe gets final product kiln-firing after compression moulding, thereby, do not need the cool place of shining.In addition also expenses such as factory building, carriage, vehicle, a dead lift, the energy, water resources consumption can be saved, mechanization, automated production can be realized.

The use roller kilns are fired, and make the firing time by original 20 hours, foreshorten to 2-4 hour, can make full use of Heat Treatment raw material and dry base substrate, realize that coal consumption reaches below 560 kilograms of mark coal/10,000 bricks, power consumption reaches below the 750 degree/10,000 bricks, per capita output 30 10,000 bricks/and more than year.Further reduce the consumption of the energy and reduce production costs, increase economic efficiency.

The preparation method of a kind of colliery wastes brick of the present invention is that gangue is pulverized, and granularity is that 50-60 purpose fine powder accounts for more than 60% in comminuting matter, and the largest particles is below 2 millimeters; The colliery powder that crushes is sent into mixer and is added water and mix, and amount of water accounts for the 6-9% of gangue powder gross weight; The material that stirs is sent into brick machine compression moulding; Formed green brick is directly put into roller kilns burn out finished product.

Embodiment:

Colliery powder is broken into powdery, and granularity is that 50-60 purpose fine powder accounts for more than 60% in comminuting matter, and the largest particles is below 2 millimeters; The colliery powder that crushes is sent into mixer and is added water and mix, and amount of water accounts for the 6-9% of gangue powder gross weight; The material that stirs is sent into brick machine compression moulding; Formed green brick is directly put into roller kilns burn out finished product.Firing temperature is controlled at 1150-1300 ℃, and the firing time was controlled at 2-4 hour.

Method of the present invention can be produced solid brick for building, hollow brick or be produced the architectural decoration brick of other shapes as required, produces the hollow brick percent opening and is controlled at about 20-30%.

Selecting for use of raw material;

Gangue: digging gangue and washing spoil all can.Fixed carbon content should be more than 7%, and ash content is more than 40%, thermal value range 1000-2500 kilocalorie/kilogram.Sulfur content is lower than the just suitable brick and tile of 1% gangue, should reject its objectionable impurities pyrite, and the granularity of gangue is to the moulding of adobe and fire all influential.If granularity is excessive, material is thick excessively, poor plasticity then, and binding ability is low, not easy-formation and make the forming machine serious wear.Carbonaceous is difficult to abundant burning in the coarse grain, thereby reduces the quality (particularly anti-freezing property is poor) of brick, it has been generally acknowledged that the largest particles of colliery wastes brick, must be less than 3 millimeters, and the granularity below 0.5 millimeter should account for more than 60%.

The roasting of gangue adobe belongs to superthermal roasting.Determine that the caloric value of brick and tile raw materials is advisable with about 400 kilocalories/kilogram, we can utilize facile several spoil raw materials rationally to prepare burden, make the caloric value of batch near optimum value, fluctuate, because the fluctuation of gangue calorific value, imitative heat constantly changes in the adobe, and the situation that is higher than set volume is recurrent, so must be equipped with the check laboratory personnel, often the caloric value of monitoring raw material spoil is adjusted raw material in time and is formed.

The gangue batch produced sintering brick of high heating value has designed special combustion system and ventilating system in order to use more for we, can make the complete after-flame of carbonaceous in the spoil, makes to exceed roasting institute calorific requirement and reclaimed.Set up waste heat boiler and high lie heat exchanger, made full use of the heat in the gangue, significantly reduced the high combustion value coal spoil be exposed to deposit in the phenomenon of Air air.

Point out experiment conclusion at last: the rational pulverization process of gangue process, method moulding preferably, burning till of science can obtain very high strength, than the brick and tile product of low water absorption, its function admirable.Because the adobe that method of the present invention is produced is to adopt half-dried compression moulding, thereby the adobe moisture content is lower than 8%, adobe is fired directly into dry limit, kiln limit after can realizing moulding, the realization coal gangue baked brick burns till fast with roller kilns, need not artificial sign indicating number car, and product is gone into the kiln kiln discharge automatically.

The preparation method of a kind of colliery wastes brick of the present invention is compared with existing technology, and has technological design Rationally, simple to operate, save the labour, save the energy, comprehensive utilization of waste materials, protect farmland, account for The characteristics such as the few small investment in ground, thereby, have good value for applications.

Claims

1. the preparation method of a colliery wastes brick is characterized in that gangue is pulverized, and granularity is that 50-60 purpose fine powder accounts for more than 60% in comminuting matter, and the largest particles is below 2 millimeters; The colliery powder that crushes is sent into mixer and is added water and mix, and amount of water accounts for the 6-9% of gangue powder gross weight; The material that stirs is sent into brick machine compression moulding; Formed green brick is directly put into roller kilns burn out finished product.