CN104402274A - Process for improving 28-day strength of clinker - Google Patents

Abstract

The invention discloses a process for improving 28-day strength of a clinker. The process comprises the following steps: adjusting humiture of a clinker processing site through ventilation equipment, temperature adjustment equipment and humidity adjustment equipment; adjusting raw materials of coal, wherein the adjusted raw material of coal comprises the following components in parts by weight: 32 parts of coking coal, 20 parts of rich coal, 8 parts of lean coal and 10 parts of gas coal; adjusting the processing procedure of industrial discharge, wherein operations of cleaning, air drying and classifying are added and a temperature increment at a uniform speed manner is adopted during calcination after adjustment. According to the process for improving the 28-day strength of the clinker, the defects in the prior art that the cooling effect is poor, the ratio is unreasonable and the calcination temperature is low are overcome, so that the advantages of good cooling effect, unreasonable ration and high calcination temperature are realized.

Description

The raising technique of a kind of grog 28 days intensity

 

Technical field

The present invention relates to cement processing technique field, particularly, relate to the raising technique of a kind of grog 28 days intensity.

Background technology

My subsidiary factory's 1# production line carries the work that whole group company special cement grog is produced, and grog is the main ingredient of cement, and the cement for grinding high-quality must have the grog of high-quality, therefore first should improve the quality of grog.In clinker quality, the 28d intensity of grog is one of very important index, the raising of grog 28d intensity contributes to us in manufacture of cement, adds more blended material, reduce the cost of cement, therefore determine to take " improving grog 28d intensity " as our brainstorm project.

Cement Industrial Process flow process, see Fig. 1.Grog 28d low strength, can only reach about 56-57Mpa.On-site investigation, see 1-12 month subsidiary factory grog in 2012 28 days intensity statistics tables:

From statistical conditions, within 2012, annual grog 28d average intensity is 56.58Mpa.

Grate-cooler cooling performance is poor: grate-cooler design cooling output is 2000t/d, but our kiln production is 2350-2500t/d, and the cooling performance of grate-cooler to grog does not reach optimum regime, sometimes also there will be " Red River " phenomenon, has a strong impact on clinker strength.

Rainy day causes slip moisture content large: the number of times that rains in a year is few, slip natively moisture about 20%, and the moisture content impact that brings of raining is little.

Temperature controls too low: in normal productive process, operation has strict standard to temperature requirement, there will not be the phenomenon that control temperature is too low.

Coal injection pipe position is improper, flame instability, calcines bad: coal injection pipe position be through producer and company technique personnel produce according to us in service condition carry out arranging, stablize at daily production Flame, and have certain rigidity, calcining effect is fine.

Instrument fault: each equipment of kiln system, each instrument monitoring point has special messenger to be responsible for, and make regular check on, and instrument breaks down, and operator can the electric personnel's process of contact in time.

Ature of coal is poor: ature of coal is poor, and raw coal grindability is poor, yields poorly, and for ensureing that kiln is normally produced, relaxes fineness and moisture content; Coal powder fraction is high simultaneously, and volatile matter is low, and thermal value is low, and bad to raw material calcining, clinker strength is seriously influenced.

Burning trade waste affects: industrial waste species is many, and composition is indefinite, and without preheating, directly enter in kiln from kiln tail and calcine, calcination time is insufficient, is mixed in grog, has a strong impact on clinker strength.

Composition of raw material fluctuation is large: produce Wingdale used, sand shale Dou Shi company oneself mining, be all in same mining area, composition is all more stable.

Learnt by analytic demonstration, the major cause causing clinker strength low has three: (1) grate-cooler cooling performance is poor; (2) ature of coal is poor; (3) burn trade waste.

Realizing in process of the present invention, contriver finds at least to exist in prior art the defect such as the unreasonable and calcining temperature of cooling performance difference, proportioning is low.

Summary of the invention

The object of the invention is to, for the problems referred to above, propose the raising technique of a kind of grog 28 days intensity, to realize the high advantage of good cooling results, reasonable ratio and calcining temperature.

For achieving the above object, the technical solution used in the present invention is: the raising technique of a kind of grog 28 days intensity, comprising:

A, employing ventilation installation, temperature equipment and damping equipment, the humiture in adjustment grog processing place;

B, adjustment coal raw material, after adjustment, in coal raw material, the parts by weight of each component are:

Coking coal: 32 parts;

Rich coal: 20 parts;

Lean coal: 8 parts;

Bottle coal: 10 parts;

The treating processes of c, adjustment trade waste, increases the operation of cleaning, air-dry and classification, adopts the mode that at the uniform velocity heats up during calcining.

Further, described step a, specifically comprises:

At grate-cooler afterbody, water spraying atomization device is installed, grog is cooled;

Periodic cleaning grate-cooler throttling valve, makes it ventilate smooth and easy.

Further, described step c, specifically comprises:

Pre-treatment is carried out to trade waste, then calcines;

Control waste calcinating speed, do not occur large fluctuation, make it be heated evenly, calcine just more abundant.

The raising technique of the grog 28 days intensity of various embodiments of the present invention, owing to comprising: adopt ventilation installation, temperature equipment and damping equipment, the humiture in adjustment grog processing place; Adjustment coal raw material, after adjustment, in coal raw material, the parts by weight of each component are: coking coal: 32 parts; Rich coal: 20 parts; Lean coal: 8 parts; Bottle coal: 10 parts; The treating processes of adjustment trade waste, increases the operation of cleaning, air-dry and classification, adopts the mode that at the uniform velocity heats up during calcining; Thus the defect that in prior art, cooling performance is poor, proportioning is unreasonable and calcining temperature is low can be overcome, to realize the high advantage of good cooling results, reasonable ratio and calcining temperature.

Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification sheets, or understand by implementing the present invention.

Below by drawings and Examples, technical scheme of the present invention is described in further detail.

Accompanying drawing explanation

Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification sheets, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is Cement Industrial Process schema.

Embodiment

Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.

According to the embodiment of the present invention, provide the raising technique of a kind of grog 28 days intensity, comprising:

A, employing ventilation installation, temperature equipment and damping equipment, the humiture in adjustment grog processing place; Step a, specifically comprises:

At grate-cooler afterbody, water spraying atomization device is installed, grog is cooled;

Periodic cleaning grate-cooler throttling valve, makes it ventilate smooth and easy;

B, adjustment coal raw material, after adjustment, in coal raw material, the parts by weight of each component are:

Coking coal: 32 parts;

Rich coal: 20 parts;

Lean coal: 8 parts;

Bottle coal: 10 parts;

The treating processes of c, adjustment trade waste, increases the operation of cleaning, air-dry and classification, adopts the mode that at the uniform velocity heats up during calcining; Step c, specifically comprises:

Pre-treatment is carried out to trade waste, then calcines;

Control waste calcinating speed, do not occur large fluctuation, make it be heated evenly, calcine just more abundant.

the target value of technical solution of the present invention:improve grog 28 days intensity, grog 28d intensity reaches 60Mpa, improves clinker strength, and produce cement suitably can add blended material more, cost-saving.

Intensity is close to our target value some in month before development of the activity, wherein there is some months clinker strength to reach more than 60Mpa number of days and reach more than 10 days, the grog 28d intensity average 58.72 in such as April, there is 12 days intensity at more than 60Mpa, fish peak technician does not lack, through everybody effort, can realize target.Stablize kiln system operation, hold raw-material enter factory close, kiln system production unit is safeguarded, minimizing stop the kiln time.

the develop countermeasures of technical solution of the present invention:for above three principal elements, formulate following countermeasures:

the implementation process of technical solution of the present invention:

implement one: the problem solving grate-cooler cooling performance difference.

Water spraying atomization device is installed at grate-cooler afterbody by establishment officer, cools grog;

Periodic cleaning grate-cooler throttling valve, makes it ventilate smooth and easy;

In operation, attentional manipulation grate-cooler grog bed thickness, makes grog reach the best state of cooling;

Test effect: clinker cooling successful takes a turn for the better, and going out grate-cooler grog can directly with hand-held.

implement two: the problem solving ature of coal difference.

The coal of purchase of goods and materials department of associated company buying quality better;

Contact quality portion adjusts collocation coal kind in time;

Supervise the quality that quality portion ensures into factory's raw coal.

Test effect: the grindability of raw coal is greatly improved, ensure that fineness and the moisture content of coal dust, and thermal value have also been obtained very large raising simultaneously, ensure that the fully calcined of supplied materials, does not occur half-cooked material phenomenon in grog.

implement three: solve and burn trade waste problem.

Contact relevant unit carries out relevant training to the staff burning trade waste, allows them understand the ABC of clinker burning;

Contact relevant departments carry out pre-treatment to trade waste, then calcine;

Control waste calcinating speed, do not occur large fluctuation, make it be heated evenly, calcine just more abundant;

Test effect: go out in grate-cooler grog not have to occur that also do not have the postindustrial waste of the calcining of Individual existence, the chemical composition in waste defines clinker mineral also at the trade waste of burning.

the effect inspection of technical solution of the present invention:

(1) QC by a year is movable, and within 2013, annual grog 28d average strength reaches 60.44 Mpa, achieves predetermined target value, sees the following form:

1-12 month subsidiary factory grog 28d intensity statistics table in 2013

(2) economical effectiveness

1, tangible benefit:

The breeze of about 1% can be added when experimentally learning that grog 28d intensity often improves 1Mpa production cement more.

2, intangible benefit: the process management enhancing a subsidiary factory, reduces energy consumption.

the reinforcing measures of technical solution of the present invention:

Consolidation effect: within 2014,1-2 month grog 28d intensity is all within our target zone; 1-2 month subsidiary factory grog 28d intensity statistics table in 2014:

Within 2014,1-2 month grog 28d intensity is respectively 60.80Mpa, 61.40Mpa, and test effect is stablized.

Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (3)

1. a raising technique for grog 28 days intensity, is characterized in that, comprising:

A, employing ventilation installation, temperature equipment and damping equipment, the humiture in adjustment grog processing place;

B, adjustment coal raw material, after adjustment, in coal raw material, the parts by weight of each component are:

Coking coal: 32 parts;

Rich coal: 20 parts;

Lean coal: 8 parts;

Bottle coal: 10 parts;

The treating processes of c, adjustment trade waste, increases the operation of cleaning, air-dry and classification, adopts the mode that at the uniform velocity heats up during calcining.

2. the raising technique of grog according to claim 1 28 days intensity, it is characterized in that, described step a, specifically comprises:

At grate-cooler afterbody, water spraying atomization device is installed, grog is cooled;

Periodic cleaning grate-cooler throttling valve, makes it ventilate smooth and easy.

3. the raising technique of grog according to claim 1 and 2 28 days intensity, it is characterized in that, described step c, specifically comprises:

Pre-treatment is carried out to trade waste, then calcines;

Control waste calcinating speed, do not occur large fluctuation, make it be heated evenly, calcine just more abundant.