CN102351452A

CN102351452A - Ultrafine fly ash production technology

Info

Publication number: CN102351452A
Application number: CN2011101978361A
Authority: CN
Inventors: 张文银
Original assignee: HUAINAN YONGKE NOVEL BUILDING MATERIALS CO Ltd
Current assignee: HUAINAN YONGKE NOVEL BUILDING MATERIALS CO Ltd
Priority date: 2011-07-14
Filing date: 2011-07-14
Publication date: 2012-02-15
Anticipated expiration: 2031-07-14
Also published as: CN102351452B

Abstract

The invention relates to an ultrafine fly ash production technology, which comprises the following steps of: (1) placing a raw material fly ash from a raw material warehouse into an air skewed slot of a grinding head; (2) conveying the raw material by the air skewed slot of the grinding head into a grinding head elevator, and lifting by the grinding head elevator into a bowl mill; (3) grinding the material into a semi-finished product in the bowl mill, and sending the semi-finished product into a grinding tail elevator through an air skewed slot of a grinding tail; (4) entering into a powder choosing machine through the grinding tail elevator, screening, absorbing an iron powder from the raw material by a magnetic separator, conveying a finished product, which accords with the standard and is the finished product with R32 sieve residue being less than 8% and the specific surface area being greater than 700m<2>/kg, into a finished product warehouse, and allowing a substandard semi-finished product to return to the grinding head elevator and enter into the bowl mill so as to repeat the grinding process and repeat the step (3) and the step (4). By the adoption of the ultrafine fly ash production technology, the production efficiency is high, and the finished product satisfies the ultrafine requirements that the R32 sieve residue is less than 8% and the specific surface area is greater than 700m<2>/kg.

Description

The production technique of superfined flyash

Technical field

The present invention relates to a kind of production technique of fine powder, relate to a kind of production technique of superfined flyash specifically.

Background technology

The solid of refinement and blocky solid property have very big difference; Particle is more little; Then solubleness is bigger, fusing point is low more, partial potential is high more, reaction point of ignition faster, combustiblematerials is low more; The activity of its optics of the particle of super-refinement, electronics, magnetics, thermodynamics and chemistry; All peculiar variation can take place, produce extraordinary effect; Because the development of modern project technology, the solid matter that requirement exists with pulverulence have the size-grade distribution of superfine particle diameter, strictness, coarse grained ratio is extremely low, even does not have fully, and existing fine powder body production technique can't satisfy above-mentioned requirements; Produce a large amount of flyash in power plant's operational process, owing to there is not the refinement production technique of flyash, the utilization again to flyash all is directly not utilize through refinement now, and this badly influences performance of products and the economic worth thereof of utilizing flyash to produce.

Summary of the invention

The production technique that the purpose of this invention is to provide a kind of superfined flyash, it can produce R ₃₂Tail over less than 8%, specific surface area is greater than 700m ²The superfined flyash of/kg.

To achieve these goals, technical solution of the present invention is: a kind of production technique of superfined flyash may further comprise the steps: (1) is put into bistrique air flume according to setting flow with the raw material powder coal ash at raw material storage; (2) get into the bistrique lift by bistrique air flume transferring raw material, promote through the bistrique lift and get into ball mill; (3) material is ground into work in-process in ball mill; Work in-process get into mill tail air flume; Air-flow in the ball mill gets into fly-ash separator dedusting in the ball mill through pulling out the gas bucket, and the fine powder after the dedusting gets into said mill tail air flume and said work in-process are sent into mill tail lift together; (4) wearable tail lift gets into powder separating machine, and the iron powder after screening in the raw material is absorbed by tramp iron separator, and standard compliant finished product promptly satisfies R ₃₂Tail over less than 8%, specific surface area is greater than 700m ²The finished product of/kg is through getting into the finished product air flume after the fly-ash separator dedusting;, the finished product lift flows into chain conveyor after promoting; Be conveyed into stockyard; Non-compliant work in-process are got back to said bistrique lift through work in-process air flume, work in-process chain conveyor, get into said ball mill and grind repeating step (3), step (4) again.

The production technique of superfined flyash of the present invention, wherein, material at first gets into the corase grind storehouse in ball mill in said step (3), and material gets into separate chamber's screening, R after the bigger grinding element of diameter impacts in the corase grind storehouse ₃₂The further abrasive in thin material entering fine grinding storehouse that tails over less than 8% becomes qualified fine powder, and qualified fine powder work in-process get into said mill tail air flume, and thick excessively material is the R of material ₃₂Tail over greater than 8% quilt sift out return the corase grind storehouse further grind, after the grinding again the screening.

The production technique of superfined flyash of the present invention, wherein, in said step (4), at first suspended dispersed is even for work in-process in powder separating machine, screens then.

After adopting such scheme, the production technique of superfined flyash of the present invention has the following advantages: because flyash is polished, screened through powder separating machine through ball mill earlier, guarantee that flyash reaches the super-refinement standard; In addition because therefore flyash twice impact of warp, polishing in ball mill further guarantee the flyash super-refinement, in addition; Owing in powder separating machine, at first make the fine powder suspended dispersed even; Therefore guarantee that graded region thing material-gas ratio is uniform and stable, improved grinding efficiency, guarantee that finished product reaches fineness requirement.The finished product superfined flyash that the production technique of superfined flyash of the present invention is produced is particularly useful for manufacture of cement, and after superfined flyash mixed general cement, because the superfined flyash particle is tiny, specific surface area was greater than 700m ²/ kg, and cement granules is thicker relatively, specific surface area is at 320m ²/ kg to 380m ²/ kg; Tiny superfined flyash is particles filled between cement granules; Make its structure fine and close more; Thereby improved cement performance, and promptly reduce water requirement, reduce hydration heat; Reduce the pore fluid of concrete rate; Prevent muriate, sulphate attack, improved strength of cement, improve the flowability of sand-cement slurry; And in cement clinker, mix superfined flyash and saved cement clinker, reduce the manufacture of cement cost, cut down the consumption of energy, reduce Carbon emission.

Description of drawings

Fig. 1 is the technological process of production figure of superfined flyash of the present invention;

Specify the production technique of superfined flyash of the present invention below in conjunction with accompanying drawing.

Embodiment

As shown in Figure 1, the production technique of superfined flyash of the present invention may further comprise the steps:

(1) after raw material storage 1 carries out computer metering and flowrate proportioning control, the raw material powder coal ash is put into bistrique air flume 2 according to setting flow; (2) get into bistrique lift 3 by bistrique air flume 2 convey materials, promote through bistrique lift 3 and get into ball mill 4; (3) in ball mill 4, material at first gets into the corase grind storehouse, and material gets into separate chamber's screening after the bigger grinding element of diameter impacts in the corase grind storehouse, and thick excessively material is the R of material ₃₂Tail over greater than 8% quilt sift out return the corase grind storehouse, R ₃₂The thin material entering fine grinding storehouse that tails over less than 8% further grinds to form qualified fine powder; Qualified fine powder work in-process get into mill tail air flume 5; Air-flow in the ball mill gets into fly-ash separator dedusting in the ball mill through pulling out the gas bucket, and the fine powder work in-process after the dedusting are sent into mill tail lift 6 through mill tail air flume 5 and work in-process more together; (4) wearable tail lift 6 gets into powder separating machine 7, and at first suspended dispersed is even for work in-process in powder separating machine 7, screens then, and the iron powder after screening in the raw material is absorbed by tramp iron separator 8, and standard compliant finished product promptly satisfies R ₃₂Tail over less than 8%, specific surface area is greater than 700m ²The finished product of/kg flows into FU type chain conveyor 12 through getting into finished product air flume 10 after fly-ash separator 9 dedustings after finished product lift 11 promotes; Be conveyed into stockyard 13; Non-compliant work in-process are got back to bistrique lift 3 through work in-process air flume 14, work in-process FU type chain conveyor 15, get into ball mill 4 and grind repeating step (3), step (4) again.

The production technique of superfined flyash of the present invention has the following advantages: because flyash twice impact of warp, polishing in ball mill; Therefore guarantee that flyash reaches the super-refinement standard; In addition; Owing in powder separating machine, at first make the fine powder suspended dispersed even; Therefore guarantee that graded region thing material-gas ratio is uniform and stable; Improved grinding efficiency, guaranteed that finished product reaches fineness requirement.The finished product superfined flyash that the production technique of superfined flyash of the present invention is produced is particularly useful for manufacture of cement, and after superfined flyash mixed general cement, because the superfined flyash particle is tiny, specific surface area was greater than 700m ²/ kg, and cement granules is thicker relatively, specific surface area is at 320m ²/ kg to 380m ²/ kg; Tiny superfined flyash is particles filled between cement granules; Make its structure fine and close more; Thereby improved cement performance, and promptly reduce water requirement, reduce hydration heat; Reduce the pore fluid of concrete rate; Prevent muriate, sulphate attack, improved strength of cement, improve the flowability of sand-cement slurry; And in cement clinker, mix superfined flyash and saved cement clinker, reduce the manufacture of cement cost, cut down the consumption of energy, reduce Carbon emission.

The above embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the prerequisite of spirit not breaking away from the present invention; Various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.

Claims

1. the production technique of a superfined flyash is characterized in that: may further comprise the steps: (1) is put into bistrique air flume according to setting flow with the raw material powder coal ash at raw material storage; (2) get into the bistrique lift by bistrique air flume transferring raw material, promote through the bistrique lift and get into ball mill; (3) material is ground into work in-process in ball mill; Work in-process get into mill tail air flume; Air-flow in the ball mill gets into fly-ash separator dedusting in the ball mill through pulling out the gas bucket, and the fine powder after the dedusting gets into said mill tail air flume and said work in-process are sent into mill tail lift together; (4) wearable tail lift gets into powder separating machine, and the iron powder after screening in the raw material is absorbed by tramp iron separator, and standard compliant finished product promptly satisfies R ₃₂Tail over less than 8%, specific surface area is greater than 700m ²The finished product of/kg is through getting into the finished product air flume after the fly-ash separator dedusting;, the finished product lift flows into chain conveyor after promoting; Be conveyed into stockyard; Non-compliant work in-process are got back to said bistrique lift through work in-process air flume, work in-process chain conveyor, get into said ball mill and grind repeating step (3), step (4) again.

2. the production technique of superfined flyash according to claim 1, it is characterized in that: material at first gets into the corase grind storehouse in ball mill in said step (3), and material gets into separate chamber's screening, R after the bigger grinding element of diameter impacts in the corase grind storehouse ₃₂The further abrasive in thin material entering fine grinding storehouse that tails over less than 8% becomes qualified fine powder, and qualified fine powder work in-process get into said mill tail air flume, and thick excessively material is the R of material ₃₂Tail over greater than 8% quilt sift out return the corase grind storehouse further grind, after the grinding again the screening.

3. the production technique of superfined flyash according to claim 1, it is characterized in that: in said step (4), at first suspended dispersed is even for work in-process in powder separating machine, screens then.