CN104817300A - Steam-pressing brick containing sludge - Google Patents

Abstract

The invention discloses a steam-pressing brick containing sludge. The steam-pressing brick comprises, by weight, 5-7 parts of cement, 8-10 parts of sludge-dehydrated cement cake, 0.1-0.2 part of calcium nitrate, 5-8 parts of carbide slag powder, 4-6 parts of coal ash, 0.1-0.3 part of urea, 0.1-0.2 part of salt, 1-2 parts of iron ore tailings, 0.1-0.2 part of stearic acid, 0.2-0.4 part of glass fibers, 0.2-0.4 part of azobisisoheptonitrile, 0.1-0.2 part of ammonium persulfate, 0.2-0.4 part of agarose, 0.1-0.2 part of polyacrylic acid, 3-5 parts of titanium dioxide and the balance of deionized water.

Description

A kind of autoclaved brick containing mud

Technical field

The present invention relates to autoclaved brick field, is exactly a kind of autoclaved brick containing mud.

Background technology

Autoclaved brick for utilizing flyash, cinder, coal gangue, mine tailings, residue of chemical industry or natural sand, tidal land mud etc. (above raw material one or several) as main raw material, a kind of novel wall material manufactured without high-temperature calcination.

Summary of the invention

The object of the present invention is to provide a kind of autoclaved brick containing mud.

Above-mentioned purpose is realized by following scheme:

Containing the autoclaved brick of mud, it is characterized in that: it is obtained by the raw material of following weight parts: cement 5-7, sludge dewatering mud cake 8-10, nitrocalcite 0.1-0.2, calcium carbide ground-slag 5-8, flyash 4-6, urea 0.1-0.3, salt 0.1-0.2, adopting iron ore tailings 1-2, stearic acid 0.1-0.2, glass fibre 0.2-0.4,2,2'-Azobis(2,4-dimethylvaleronitrile) 0.2-0.4, ammonium persulphate 0.1-0.2, agarose 0.2-0.4, polyacrylic acid 0.1-0.2, titanium dioxide 3-5, deionized water are appropriate.

Described a kind of autoclaved brick containing mud, is characterized in that: preparation method comprises the following steps:

(1) by after sludge dewatering mud cake, nitrocalcite, stearic acid mixing, add suitable quantity of water, after stirring, leave standstill 2-4 hour, dry, it is for subsequent use that mistake 100-120 mesh sieve obtains modified sewage sludge powder;

(2) titanium dioxide is joined in appropriate amount of deionized water, after stirring, then agarose, polyacrylic acid are added wherein, stir at 35-40 DEG C, obtain gelating soln;

(3) join in gelating soln by carbide slag powder, ball milling mixes and obtains slurry, adds 2,2'-Azobis(2,4-dimethylvaleronitrile), ammonium persulphate, reacts 20-30min under normal temperature, dry 10-20h at 70-80 DEG C, after at 500-550 DEG C, calcine 1-2h, obtain coated powder;

(4) coated powder and appropriate amount of deionized water and modified sewage sludge powder, all the other raw material stirring are even, shaping, obtained autoclaved brick blank;

(5), after autoclaved brick blank being left standstill 10-12h, put into autoclave and carry out high pressure steam press maintenance, be incubated 10-12h at 190-195 DEG C, under vapor pressure 1.2-1.5MPa, then go out still, to obtain final product.

Beneficial effect of the present invention is: the present invention uses by carrying out modification to mud, it can be made better can to combine with all the other raw materials, avoid the difficult point of the mud utilizing water content higher, increase intensity of the present invention simultaneously; The present invention is by surperficial at carbide slag by coated by titanium dioxide, certain sterilization, disinfection can be played to carbide slag, by improving intensity and the anti-freezing property of gained autoclaved brick, make cladding titanium dioxide by gelating soln evenly, gained autoclaved brick folding strength is higher.

Embodiment

An autoclaved brick containing mud, it is obtained by the raw material of following weight (kg): cement 7, sludge dewatering mud cake 10, nitrocalcite 0.2, calcium carbide ground-slag 5, flyash 4, urea 0.1, salt 0.1, adopting iron ore tailings 1, stearic acid 0.1, glass fibre 0.2,2,2'-Azobis(2,4-dimethylvaleronitrile) 0.2, ammonium persulphate 0.2, agarose 0.4, polyacrylic acid 0.1, titanium dioxide 3, deionized water are appropriate.

Described a kind of autoclaved brick containing mud, preparation method comprises the following steps:

(1) by after sludge dewatering mud cake, nitrocalcite, stearic acid mixing, add suitable quantity of water, after stirring, leave standstill 3 hours, dry, it is for subsequent use that mistake 100 mesh sieves obtain modified sewage sludge powder;

(2) titanium dioxide is joined in appropriate amount of deionized water, after stirring, then agarose, polyacrylic acid are added wherein, stir at 38 DEG C, obtain gelating soln;

(3) join in gelating soln by carbide slag powder, ball milling mixes and obtains slurry, adds 2,2'-Azobis(2,4-dimethylvaleronitrile), ammonium persulphate, reacts 30min under normal temperature, dry 20h at 80 DEG C, after at 550 DEG C, calcine 2h, obtain coated powder;

(4) coated powder and appropriate amount of deionized water and modified sewage sludge powder, all the other raw material stirring are even, shaping, obtained autoclaved brick blank;

(5), after autoclaved brick blank being left standstill 12h, put into autoclave and carry out high pressure steam press maintenance, be incubated 12h at 190-195 DEG C, under vapor pressure 1.2-1.5MPa, then go out still, to obtain final product.

60 parts of obtained autoclaved brick censorship tests, draw: mean compressive strength is 19.32Mpa, average folding strength is 5.15Mpa, and after freezing and thawing test, mean compressive strength is 15.8Mpa, and frost resistance meets the requirement of MU15C premium grads in GB11945-1999 " autoclaved lime-sand brick ".

Claims (2)

1. containing the autoclaved brick of mud, it is characterized in that: it is obtained by the raw material of following weight parts: cement 5-7, sludge dewatering mud cake 8-10, nitrocalcite 0.1-0.2, calcium carbide ground-slag 5-8, flyash 4-6, urea 0.1-0.3, salt 0.1-0.2, adopting iron ore tailings 1-2, stearic acid 0.1-0.2, glass fibre 0.2-0.4,2,2'-Azobis(2,4-dimethylvaleronitrile) 0.2-0.4, ammonium persulphate 0.1-0.2, agarose 0.2-0.4, polyacrylic acid 0.1-0.2, titanium dioxide 3-5, deionized water are appropriate.

2. a kind of autoclaved brick containing mud according to claim 1, is characterized in that: preparation method comprises the following steps:

(1) by after sludge dewatering mud cake, nitrocalcite, stearic acid mixing, add suitable quantity of water, after stirring, leave standstill 2-4 hour, dry, it is for subsequent use that mistake 100-120 mesh sieve obtains modified sewage sludge powder;

(2) titanium dioxide is joined in appropriate amount of deionized water, after stirring, then agarose, polyacrylic acid are added wherein, stir at 35-40 DEG C, obtain gelating soln;

(3) join in gelating soln by carbide slag powder, ball milling mixes and obtains slurry, adds 2,2'-Azobis(2,4-dimethylvaleronitrile), ammonium persulphate, reacts 20-30min under normal temperature, dry 10-20h at 70-80 DEG C, after at 500-550 DEG C, calcine 1-2h, obtain coated powder;

(4) coated powder and appropriate amount of deionized water and modified sewage sludge powder, all the other raw material stirring are even, shaping, obtained autoclaved brick blank;

(5), after autoclaved brick blank being left standstill 10-12h, put into autoclave and carry out high pressure steam press maintenance, be incubated 10-12h at 190-195 DEG C, under vapor pressure 1.2-1.5MPa, then go out still, to obtain final product.