CN100418917C

CN100418917C - Handling method for using aluminum sulfate slag as cement ingredient

Info

Publication number: CN100418917C
Application number: CNB2007100204422A
Authority: CN
Inventors: 谭纪林
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-27
Filing date: 2007-02-27
Publication date: 2008-09-17
Anticipated expiration: 2027-02-27
Also published as: CN101041562A

Abstract

The invention discloses a disposing method to supply aluminum sulfate slag as cement dosage, which comprises the following steps: mixing aluminum sulfate slag and acetylene gas slag and coal ash as finite ratio; producing blank independently; disposing mature blank block with high-temperature roasting steps; grinding into powder separately; using to cement or concrete; or grinding mature blank block and cement clinker to cement. This invention is a good disposing method, which can improve the antiwear property of cement markedly.

Description

The treatment process of using aluminum sulfate slag as cement ingredient

Technical field

The present invention relates to a kind of waste residue treatment process; particularly the chemical plant is contained high-alumina with vitriolization; produce the using aluminum sulfate slag as cement ingredient that Tai-Ace S 150 discharges and a kind of method of the harmless treatment of carrying out belongs to environmental protection or cement field as mineral such as bauxitic clays.

Background technology

Aluminium sulfate slag is that the chemical plant contains high-alumina with vitriolization, produces the waste residue that Tai-Ace S 150 is discharged as mineral such as bauxitic clays, and it contains the Al about 15% ₂O ₃, about 10% SO ₃, major part is SiO ₂With other oxide compound of small part, the pH value is less than 6, and water content is about 40%, and development and use are difficult, can only make waste residue and handle, pile up like a mountain for a long time, a large amount of land occupations, the waste liquid seepage after drenching with rain, a large amount of polluted agricultural lands cause severe contamination to environment, are one of the main evils in chemical plant.In order to turn waste into wealth, eliminate public hazards, a lot of people have thought many ways, wherein also the someone manages it is mixed and makes cement ingredient in the cement, its method mainly is aluminium sulfate slag to be made a kind of raw material in the cement slurry use or directly mix in the cement clinker and use, when aluminium sulfate slag being made a kind of raw material in the cement slurry and uses, then need just can sinter it into cement clinker at the cement roasting in kilns during to about 1500 ℃ of high temperature, consumption of energy strengthens and production efficiency reduces, so little to the effect that reduces cost, few people use in the actual production.Be difficult to also in actual production realize that for aluminium sulfate slag directly being mixed the idea of using in the cement clinker because of aluminium sulfate slag is that the chemical plant contains high-alumina with vitriolization, produce the waste residue that Tai-Ace S 150 is discharged as mineral such as bauxitic clays, it contains the Al about 15% ₂O ₃, about 10% SO ₃, major part is SiO ₂With other oxide compound of small part, the pH value is less than 6, and water content is about 40%, as directly mixing in cement clinker, can make grog shift to an earlier date aquation, reduce hydrated cementitious ability afterwards, also, influence mill hourly output, so also there is not actual use value because of grinding material makes moist.In sum, up to the present, aluminium sulfate slag is still failed a large amount of as cement ingredient.

Summary of the invention

The objective of the invention is above-mentioned directly make cement raw material and increase energy consumption and reduce the weak point of production efficiency in order to overcome, also to overcome and directly mix in cement clinker and make grog shift to an earlier date aquation and reduce afterwards the hydrated cementitious ability and because of the grinding material weak points such as influencing mill hourly output of making moist, provide a kind of energy consumption low, do not influence hydrated cementitious ability and mill hourly output, can obviously improve performances such as cement is wear-resisting and reduce a kind of treatment process of cement cost using aluminum sulfate slag as cement ingredient.

The treatment process of using aluminum sulfate slag as cement ingredient of the present invention is characterized in that may further comprise the steps:

A) with parts by weight of raw materials be: aluminium sulfate slag 1-3 part, acetylene gas slag 1-2 part, flyash 1-2 part add makes briquet after suitable quantity of water stirs, and green briquette is dried in natural curing;

B) green briquette is placed in the annular kiln with naturally cooling kiln discharge behind 280-680 ℃ lower temperature calcination 8-30 hour and ripe briquet;

C) ripe briquet is worn into powder separately, be directly used in cement or the concrete, or ripe briquet is become cement with the cement clinker grinding.

In order green briquette to be grilled thoroughly and to make maturing temperature lower and make the structure of ripe briquet produce new functional group, promptly increase the silicon of atomic little polymolecularity and the hydrate of calcium, the annular kiln temperature during roasting is advisable with 280-680 ℃.

For the ease of drying and roasting, the volume of described briquet is advisable with (4-8) * (8-16) * (20-30) cm.

The aluminium sulfate slag that present method is used, be that the chemical plant contains high-alumina with vitriolization, the meeting of discharging when producing the Tai-Ace S 150 product as mineral such as bauxitic clays causes the waste residue of severe contamination to environment, acetylene gas slag and flyash also all are industrial residues, mix base by a certain percentage, again through low-temperature bake, can make the new functional group of generation in the product structure, the silicon of atomic little polymolecularity and the hydrate of calcium have been increased, in cement, can be better produce hydrate with grog and glue together jointly, slag that used aggregate is also can be with having hydraulicity hydration rate slower and so on material tightly glues together, and can be to these aquations aquation condition of providing of material slowly.The aquation condition that more be rich in excellent in durability, particularly can provide to the slow material of aquation of slag and so on.Therefore, the aluminium sulfate slag product that comes out through processing treatment, in cement, use the stability and the cement intensity that can effectively improve cement gel performance and cement stone, can improve slag cement stone abrasion resistance especially, more can solve present a great problem, also can replace road cement to use construction industry cement quality weak point in work-ing life.The inventive method has overcome the weak point of directly making cement raw material and increasing energy consumption and reduction production efficiency effectively, overcome again directly mix in cement clinker and make grog shift to an earlier date aquation and reduce afterwards the hydrated cementitious ability and because of the grinding material weak points such as influencing mill hourly output of making moist, be that a kind of energy consumption is low, technology is advanced rationally, can obviously improve performances such as cement is wear-resisting, reduce cement cost and help a kind of good treatment method of advantages such as environmental protection using aluminum sulfate slag as cement ingredient.

Embodiment

In conjunction with specific embodiments the present invention is further described as follows:

Embodiment 1

With weight part be: 2 parts of aluminium sulfate slags, 1.5 parts of acetylene gas slags, flyash add for 1.5 parts makes 6 * 12 * 24cm briquet after suitable quantity of water is mixed, and green briquette is dried in natural curing; Green briquette is placed roasting in kilns, and when maturing temperature reached 620 ℃, the cooling kiln discharge was the aluminium sulfate slag product with its powder of wearing into.The aluminium sulfate slag product is mixed by a certain percentage and is used for replacing the commodity slag cement as gelling material and commodity slag cement as gelling material, carry out intensity and physicals such as wear-resisting test according to the relevant cement physical properties testing standard of ISO respectively, (it is 1: 3 promptly with cement mortar rate, water-cement ratio is 0.5, available gelling material 450 grams, standard sand 1350 grams, the test block specification is 4 * 4 * 16cm, 3 of every composing types are by the standard demoulding, maintenance, test necessarily makes phase intensity, and the abrasion resistance test is carried out under the same conditions, it is exactly the test block of same maintenance, same as far as possible weight, same area, same speed, on same sand mill, carry out the same time, weight was exactly loss amount after weight deducted and grinds before will grinding, and loss amount is more little, and abrasion resistance is just good more).Its test result is as shown in table 1

Table 1 is handled the performance table that aluminium sulfate slag replaces the commodity slag cement

By table 1 as seen, abrasion resistance and folding strength, the ultimate compression strength of mixing in the slag cement of existing goods behind a certain proportion of Tai-Ace S 150 ground-slag all are higher than the slag cement of not mixing aluminium sulfate slag, are that the over-all properties of 3 blending ratio is better with sequence number wherein.

Embodiment 2

With weight part be: 3 parts of aluminium sulfate slags, 1 part of acetylene gas slag, flyash add for 1 part makes 8 * 16 * 30cm briquet after suitable quantity of water is mixed, and green briquette is dried in natural curing; Green briquette is placed roasting in kilns, when maturing temperature reaches 320 ℃, the cooling kiln discharge, the aluminium sulfate slag of handling with gained be 1 part and cement clinker to add gypsum be 1 part, mix by weight ratio and wear into powder, be called for short powder mix, then be mixed into gelling material with the commodity slag powders, according to the relevant cement physical properties testing standard of ISO, carry out performance relatively with commodity Portland cement, road cement, result's example is in the table 2.

Table 2 powder mix and slag powders gelling material and Portland cement road cement performance comparison sheet

By table 2 as seen, abrasion resistance and folding strength, the ultimate compression strength of mixing in existing commodity slag powders behind a certain proportion of aluminium sulfate slag powder mix all is higher than into the Portland cement of mixing the aluminium sulfate slag powder mix and road cement.This shows, can well replace road cement to use.

Embodiment 3

With weight part be: 1.5 parts of aluminium sulfate slags, 1.5 parts of acetylene gas slags, flyash add for 2 parts makes 10 * 16 * 30cm briquet after suitable quantity of water is mixed, and green briquette is dried in natural curing; Green briquette is placed roasting in kilns, and when maturing temperature was 450 ℃, the cooling kiln discharge was the aluminium sulfate slag product with its powder of wearing into.The aluminium sulfate slag product is mixed by a certain percentage and is used for replacing skillful material cement as gelling material and skillful material cement as gelling material, carry out intensity and physicals such as wear-resisting test relatively according to the relevant cement physical properties testing standard of ISO respectively, its result's example is in the table 3.

Table 3 contains handles aluminium sulfate slag cement and skillful material cement performance comparison sheet

As shown in Table 3, in skillful material cement, mix an amount of Tai-Ace S 150 ground-slag, its physicals is better than skillful material cement, and the quality of skillful material cement is best in cement, but cost is the highest, quality after mixing part of sulfuric acid aluminium ground-slag can also have further raising, and cost but can obviously descend because of the low cost of Tai-Ace S 150 ground-slag.

In the above-described embodiment, exist by weight: all can produce quality Tai-Ace S 150 ground-slag preferably in the proportional range of aluminium sulfate slag 1-3 part, acetylene gas slag 1-2 part, flyash 1-2 part, the annular kiln temperature burns between 280-680 ℃ all can, as be lower than 280 ℃ and then can make green briquette burn saturating and influence quality, be higher than 680 ℃ as temperature, can't improve the quality of ripe briquet, can influence the generation of new functional group on the contrary and influence quality, also can consume a lot of fuel more and increase cost.Requirement to the briquet volume is not very strict, then can increase labor cost but volume is too small, and volume excessive then can being difficult for grills thoroughly, and general optional volume is advisable with (4-8) * (8-16) * (20-30) cm.

The aluminium sulfate slag of the chemical plant being discharged with present method is processed into the Tai-Ace S 150 ground-slag, be incorporated in various cement products or the concrete by suitable proportion, can effectively improve cement quality, and can reduce cement cost, through the relevant works practical probation, its cement quality has to be received that slurry is fast, intensity is high, hydration heat is low, prevents that seepage and anti-performance such as wear-resisting are all than advantages such as the quality of not mixing the Tai-Ace S 150 ground-slag are good.So, the aluminium sulfate slag product energy consumption of handling with present method is low, quality is good, about 100 yuan/ton of the aluminium sulfate slag product of producing, and skillful material cement is 200-300 unit/ton, can make cement mark improve 1 grade after mixing, as mix blended material more, can improve cement output, make the cement cost of various labels lower, performances such as its wear resistance but are higher than with label cement, so the application prospect of aluminium sulfate slag product in manufacture of cement of producing with present method will be extraordinary, meet the cycle development of national industrial residue resource utilization especially and help the good method that turns waste into wealth of environmental protection policy.

Claims

1. the treatment process of a using aluminum sulfate slag as cement ingredient is characterized in that may further comprise the steps:

2. the treatment process of using aluminum sulfate slag as cement ingredient as claimed in claim 1, the volume that it is characterized in that described briquet is (4-8) * (8-16) * (20-30) cm.