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Process for producing autoclaved mud bricks by using paper-making solid wastes

A technology of solid waste and autoclaving, which is applied in the direction of solid waste management, sustainable waste treatment, building construction, etc., can solve the problems of unstable product quality, high production cost, unsalable products, etc., and achieve good economy and light weight , smooth appearance effect

Inactive Publication Date: 2010-09-01
岳阳华泰资源开发利用有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low brick-making yield, unstable product quality, high energy consumption, high production cost and serious unsalable products in the current brick-making project of papermaking solid waste, and to provide a light-weight , high strength, sound insulation, heat preservation and frost resistance, and the technology of autoclaved mud bricks with smooth appearance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Firstly, the alkali recovery white mud is added to the papermaking water treatment sludge according to 12% of the absolute dry weight (weight) of the papermaking water treatment sludge for compact preparation to obtain the modulated sludge; then weigh 1300g of the modulated sludge, fly ash 4850g, 1000g of coarse lime mud, 1000g of sand, 1200g of slag, 500g of lime and 150g of desulfurized gypsum are blended and then stirred evenly in the mixing equipment; then the above mixture is made into a brick with a shape and size of 240×115×53 by a hydraulic brick making machine; Use the waste heat of the combustion furnace of the thermal power station to dry the adobe, so that the moisture content of the adobe is controlled below 16%, and then the dried adobe is sintered at a high temperature of 850°C to 1200°C for 3.5 hours to form a finished product. The finished product reaches the standard of JC239-2001 "fly ash brick".

Embodiment 2

[0018] First, the alkali recovery white mud is added to the papermaking water treatment sludge according to 18% of the absolute dry weight (weight) of the papermaking water treatment sludge for dense preparation to obtain the prepared sludge; then 1000g of the prepared sludge, 5200g of fly ash, Coarse lime mud 1200g, sand 800g, slag 1000g, lime 700g and desulfurized gypsum 250g are blended and stirred evenly in the mixing equipment; then the above mixture is made into bricks with a shape and size of 240×115×53 by a hydraulic brick making machine; The waste heat of the station combustion furnace is used to dry the adobe, so that the moisture content of the adobe is controlled below 16%, and then the dried adobe is sintered at a high temperature of 850°C to 1200°C for 3.5 hours to form a finished product. The finished product reaches the standard of JC239-2001 "fly ash brick".

Embodiment 3

[0020] Firstly, the alkali recovery white mud is added into the papermaking water treatment sludge according to 15% of the absolute dry weight (weight) of the papermaking water treatment sludge for compact preparation to obtain the prepared sludge; the prepared sludge 1600g, fly ash 4000g, coarse 800g of lime mud, 1200g of sand, 1500g of slag, 600g of lime and 700g of desulfurized gypsum are blended and then mixed evenly in the mixing equipment; then the above mixture is made into adobe with a shape and size of 240×115×53 by a hydraulic brick making machine; The waste heat of the combustion furnace is used to dry the adobe, so that the water content of the adobe is controlled below 16%, and then the dried adobe is sintered at a high temperature of 850°C to 1200°C for 3.5 hours to form a finished product. The finished product reaches the standard of JC239-2001 "fly ash brick".

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Abstract

The invention discloses a process for producing autoclaved mud bricks by using paper-making solid wastes. The process is characterized by comprising the following steps of: adding alkali recovery white clay into paper-making water treatment sludge to obtain modulated sludge; uniformly mixing the modulated sludge and pulverized fuel ash, crude white clay, sand, slag, lime and desulfurization gypsum in proportion in a mixer; producing unburned bricks by using the mixture with a hydraulic brick making machine; and drying the unburned bricks and sintering the dried unburned bricks at a high temperature to produce the finished products. The autoclaved mud bricks produced by the process have light weight, high strength, sound insulation, high heat preservation and anti-freezing properties and the high performance of neat appearance; and the process has the advantages of good economic, environmental-protection and social effects because the wastes of cogeneration paper-making enterprises are comprehensively treated.

Description

technical field [0001] The invention relates to the fields of environmental protection, comprehensive utilization of resources and building materials, in particular to a process for making autoclaved mud bricks from papermaking solid waste. Background technique [0002] At present, the actual operation of all paper-making solid waste brick-making projects is far from the expected value. The main reasons are as follows: 1) The water absorption of paper-making solid waste bricks is improved while the density is reduced, and the corrosion resistance to the environment is far away. below standard bricks. In brick making, sludge reduces the plasticity of the mixed sample and reduces the bonding performance between the particles of the mixed sample. The lower the water absorption rate of the brick, the stronger its durability and corrosion resistance to the environment, so the internal structure of the brick should be as dense as possible to avoid water infiltration. However, a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/30E04C1/00
CPCY02W30/91
Inventor 陈金山周乐才陈雷刘滇辉涂陆军黄平革
Owner 岳阳华泰资源开发利用有限责任公司
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