CN104446031A - Method for increasing mixing amount of granulated blast-furnace slag powder in cement - Google Patents

Abstract

The invention discloses a method for increasing the mixing amount of granulated blast-furnace slag powder in cement. The method comprises steps as follows: a, the equipment structure is adjusted, the content of cement smaller than 3 micrometers is controlled in a range of 15.0%-21.0%, and the full grinding phenomenon is completely eradicated; b, measurement equipment and a measurement process are adjusted, and the measurement deviation is controlled within 2.0%; c, the limestone granularity is adjusted, and the adjusted cement comprises components in parts by weight as follows: 8.1 parts of mineral powder and 34.8 parts of an admixture. The method for increasing the mixing amount of the granulated blast-furnace slag powder in the cement can overcome defects of unreasonable structures, poor measurement reliability, large limestone quality fluctuations and the like in the prior art and has the advantages of reasonable structure, high measurement reliability and small limestone quality fluctuation.

Description

A kind of method improving cement GBFS incorporation

Technical field

The present invention relates to cement processing technique field, particularly, relate to a kind of method improving cement GBFS incorporation.

Background technology

Guangxi Yu Feng cement limited-liability company 1# production line is built in 1958, belongs to wet method line production line, within 2002, transform wet grinding and dry burning type production line as.Considering cement industry dog-eat-dog, reducing production cost is the only way of enterprise; But the GBFS surplus capacity that my company #4 production line slag vertical-mill is produced is comparatively large, mill is completely stopped in frequent storehouse, and mill running rate is lower.For making full use of Vertical Mill production capacity, companies ask 1# production line is by mixing GBFS (referred to as breeze) after homogenizer.

In company's 1-5 month P.C32.5 cement in 2012, GBFS incorporation only promising 4.8%, does not reach company's appraisal standards.Blending amount of mixture material and the ultimate compression strength of the P.C32.5 cement of 1-5 month 1# line production in 2012 are added up, statistic data:

The breeze incorporation average out to 4.8% of the P.C32.5 cement of the 1-5 month in 2012, wherein 5 monthlyly do not reach performance assessment criteria (check requirements P.C32.5 cement contents of ground slag is not less than 7.0%), in GB175-2007, P.C32.5 cement is specified, blending amount of mixture material need be greater than 20.0% and be less than or equal to the cement that 50.0%, 1# line produces and also to have greatly improved space.Cement 3 days ultimate compression strength is 20.3MPa, and within 28 days, ultimate compression strength is 39.6MPa, and strength stability is better.Essential factor is determined: grinding machine grating is unreasonable, easily full grinds, and measures inaccurate, Wingdale quality fluctuation.

Realizing in process of the present invention, contriver finds at least there is the defects such as unreasonable structure, metering poor reliability and Wingdale quality fluctuation are large in prior art.

Summary of the invention

The object of the invention is to, for the problems referred to above, propose a kind of method improving cement GBFS incorporation, with implementation structure rationally, metering good reliability and the little advantage of Wingdale quality fluctuation.

For achieving the above object, the technical solution used in the present invention is: a kind of method improving cement GBFS incorporation, comprising:

A, adjustment device structure, cement less than 3 microns content control 15.0% to 21.0%, stop full mill phenomenon;

B, adjustment metering outfit and metering process, control measurement deviation within 2.0%;

C, adjustment limestone granularity, after adjustment, in cement, the parts by weight of each component are:

Breeze: 8.1 parts;

Blended material: 34.8 parts.

Further, described step a, specifically comprises:

Grinding element quantity and size in adjustment mill;

Activation current limliting circle is set in fine grinding storehouse, helps grinding, flow control and lifting.

The method of the raising cement GBFS incorporation of various embodiments of the present invention, owing to comprising: a, adjustment device structure, cement less than 3 microns content control 15.0% to 21.0%, stop full mill phenomenon; B, adjustment metering outfit and metering process, control measurement deviation within 2.0%; C, adjustment limestone granularity, after adjustment, in cement, the parts by weight of each component are: breeze: 8.1 parts; Blended material: 34.8 parts; Thus unreasonable structure in prior art, metering poor reliability and the large defect of Wingdale quality fluctuation can be overcome, with implementation structure rationally, metering good reliability and the little advantage of Wingdale quality fluctuation.

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 embodiment, technical scheme of the present invention is described in further detail.

Embodiment

Below 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 a kind of method improving cement GBFS incorporation.

Technical scheme of the present invention, can improve P.C32.5 cement GBFS incorporation, in P.C32.5 cement, GBFS volume is not less than 7.0%.Cement Market dog-eat-dog, reduces manufacture of cement cost, enhances competitiveness.

gameeing of technical solution of the present invention:

Mix the major cause in P.C32.5 cement according to the powder affecting granulated blast-furnace slag, our QC-group has formulated concrete countermeasures, and makes strategy table:

the countermeasure of technical solution of the present invention is implemented:

Enforcement one, unreasonable, the easy full mill of grinding machine grating

Activation current limliting circle is set in fine grinding storehouse, helps grinding, flow control and lifting;

According to grinding body gradation in material and cement type adjustment mill;

The processing parameters such as comprehensive material parameter adjustment screening plant size, mill inner ventilation, mill speed, optimize grinding machine grinding efficiency.

By improved go out to grind cement adopt laser particle size analyzer be size distribution figure.Find that 0 ~ 3 μm of fine grain content controls about 19%, will reduce nearly 8% before, the granule content of 3 ~ 32 μm is about 55%, > 65 μm of coarse grained content is about 7%.After adjustment grain composition be more conducive to improving the intensity of cement.And running some months, there is not full mill phenomenon.

Implement two, measure inaccurate

1. demarcate breeze blanking measurement, demarcation utilizes materials calibration, sets certain proportioning, then starts breeze blanking, utilizes canning cart to load from feed opening breeze out, then weigh, draw breeze weight, then contrast with set(ting)value.Demarcate and carried out 5 times altogether, correlation data is as table:

Number of times	Setting blanking tonnage (t)	Actual blanking tonnage (t)	Deviation (%)
				1	10	10.1	2.0
2	12	11.9	0.8
				3	15	15.3	2.0
4	17	17.2	1.2
				5	20	19.7	1.5

2. the routine maintenance responsibility of each weighing balance of specification.Strengthen the supervision to each weighing balance and maintenance, ensure that the accurate stable of material mixes.Supervise and patrol and examine post personnel and carry out scene in strict accordance with relevant regulations stipulate and patrol and examine and safeguard, Timeliness coverage is also dealt with problems, and each class at least clears up more than twice, and carries out associated note.And this regulation is added in " a subsidiary factory grinding machine operator responsibilities ".

3. periodic calibrating breeze weighing balance.Breeze weighing balance directly affects the quality of cement, and time breeze is mixed more than 7%, if fluctuation 1-2%, 3 days ultimate compression strength can decline about 1.5MPa.So the long-term stability in order to ensure weighing balance, we do not have 2 months and will demarcate weighing balance.Through production leadtime and nominal data, our breeze weighing balance deviation control, within 1.5%, reaches desired result.

Enforcement three, Wingdale quality fluctuation

Formulate corresponding check-up system, specification Materials Company enters factory and checks on.

The Wingdale mixed in cement is nonactive blended material, because have higher requirement to its calcium contents, we are defined as " high calcium lime stone ", and performance assessment criteria calcium oxide content is greater than 50.0% brings up to 53.0%.And granularity qualification rate is decided to be 80.0%.Find defective procedure quality accident in production process, process according to " Deal with mass accident way ", such as granularity qualification rate does not reach 80.0%, be then the quality accident of C class, and button penalizes 20-200 unit quality control bonus, by handling return time serious.

2. quality portion watchman strengthens into factory's Wingdale quality monitoring.Require that quality portion watchman Wingdale checks its silt content and granularity when entering factory immediately.And multidraw, make result fast with fluorescence analyser.If there are abnormal conditions to report immediately.Enter factory's Wingdale and obtained effective control, implementing measure is effective and feasible.

The quality condition of the P.C32.5 cement mixed after this activity is added up:

Can find out, blended material is on the original basis be no less than, and the volume of GBFS reaches 7.9%, and the total volume of blended material also reaches 42.8%; And ultimate compression strength is very stable, all in examination scope.

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 (2)

1. improve a method for cement GBFS incorporation, it is characterized in that, comprising:

A, adjustment device structure, cement less than 3 microns content control 15.0% to 21.0%, stop full mill phenomenon;

B, adjustment metering outfit and metering process, control measurement deviation within 2.0%;

C, adjustment limestone granularity, after adjustment, in cement, the parts by weight of each component are:

Breeze: 8.1 parts;

Blended material: 34.8 parts.

2. the method for raising cement GBFS incorporation according to claim 1, it is characterized in that, described step a, specifically comprises:

Grinding element quantity and size in adjustment mill;

Activation current limliting circle is set in fine grinding storehouse, helps grinding, flow control and lifting.