Method for producing walling material by using papermaking white mud

Abstract

The invention discloses a method for producing a walling material by using papermaking white mud. The method is characterized by comprising steps of: taking 40-60 percentage (by weight) of papermaking white mud, 20-45 percentage (by weight) of lithium slag, 10-20 percentage (by weight) of cement and 1-6 percentage (by weight) of active excitant, and adding into a mixer for mixing, wherein the active excitant is made of a mixture of polyacrylic acid, polycarboxylic acid water-reducing agent and aluminum potassium sulfate; dispensing the mixture into a group of molds, and placing on a vibratingtable of a block molding machine for molding by vibration; placing the molds filled with the mixed materials into a curing case with temperature of 15-25 DEG C and humidity more than 90% to cure for 20-30 hours and then demolding; and further putting into a curing case with temperature of 60-80 DEG C to cure for 20-30 hours by steaming, thereby obtaining the walling material. The method for producing the walling material by using the papermaking white mud has the advantages of good product performance, reducing pollution to environment caused by industrial refuse, reducing manufacturing cost of the walling material, saving a large number of building materials, reducing energy consumption, and being both economical and environmental-friendly.

Description

technical field [0001] The invention belongs to a method for preparing block-like or other-shaped building components in building components, and relates to a method for mainly using waste to prepare building wall materials—blocks, and in particular to a method for producing wall materials using papermaking white mud method. It is suitable for mainly using waste papermaking white mud, lithium slag, etc. to produce building wall materials - blocks. Background technique [0002] Papermaking white mud (hereinafter referred to as white mud) comes from the white mud recovery stage of the alkali recovery workshop in the papermaking process; in the papermaking process, the pulping black liquor is extracted, evaporated and concentrated, and roasted in the alkali recovery furnace to obtain the melt. Dissolve in water to form a green liquid, then add lime to the green liquid for causticization reaction to obtain a white precipitate, which is white mud. [0003] In papermaking lime m...

AI Technical Summary

Problems solved by technology

[0008] (1) Since the residual alkali in the white mud will produce efflorescence when the product (whether it is a block or cement) encounters moisture, the strength of the damage will be affected and the surface of the wall will be affected. It is difficult for the produced blocks and other products to meet the national product quality standards requirements;

[0009] (2) Adding too much white mud will affect the strength of building materials, because its original activity is small, which has a significant impact on the strength indicators of the product, that is, compression resistance and flexural resistance; and the addition of cement production often results in residual alkali at high temperatures during production. Sometimes sublimation corrodes and blocks equipment, which endangers production safety and other situations;

[0010] (3) The moisture content of white mud is 40% to 55%. Some of them need to be dried before use, and the cost increase is relatively low. Or when mixing various raw materials in production, it will bring higher energy to achieve uniformity and consistency of mixing. Consumption, high production cost, low practical value

The production of clay bricks, a traditional building material, not only causes great damage to land resources, seriously threatens food production, but also consumes a lot of energy and causes serious environmental pollution.

Images