The cement plant uses its large-capacity calciner to help the city deal with the urban pollution problem.
Such as solid waste
Things,
Pollution problems such as river silt.
The clinker combustion system of Bao Yue Cement Plant adopts the low pressure of Humboldt Company.
Five-stage preheater and new efficient calciner,
Its calciner has a large volume and a precombustion chamber.
First, it is convenient for materials to enter.
Total heat exchange of pipeline,
Secondly, it can be used to treat urban garbage.
Use waste as an alternative fuel.
here
On the other hand, Bao Yue Cement Plant has successfully treated milk, sludge and cigarettes containing melamine.
Bao Yue Cement Plant takes the road of "green development and environmental protection pioneer", which is not only to treat urban garbage.
Make a contribution to the recycling of the production and domestic sewage in the factory after treatment, and realize zero discharge of wastewater. Still there/still there
The application of gypsum desulfurization, mine stripping soil and fly ash has made outstanding contributions.
4.
Consolidate the knowledge learned in textbooks.
In reality, the production technology of cement is the same as that in textbooks, and many technologies and equipment are learned in class.
Some of them are now strengthened and consolidated in the form of physical objects, and their memories are clearer. Simply put, cement.
There are only a few steps in the production process.
From the acquisition of raw materials,
Pre-homogenization,
To the ingredients,
Grinding,
Fire,
Cooling,
Ex works. The general flow of each step is consistent with what you learned in class.
4.
See with your own eyes the actual cement plant, actual cement production and high degree of automation control.
I have never seen a real cement plant, and now I finally understand that the original cement plant is so big that every
Each device is ten meters to several tens of meters high.
Standing below,
You are looking at a monster,
You are like a little person.
ant
5.
Learn a lot of knowledge that I haven't touched before.
During the visit, we kept asking questions to the teachers and technicians who showed us around. Many details are
We've never been in contact,
Although many of these problems are bad,
Teachers give them to us one by one.
Answer. The production of cement is simple and uncomplicated, but it is meticulous to every link in the process.
Process control,
This is not an easy thing.
Today, we learned a lot about equipment.
I also saw what modern mass production looks like in this reality.
The central control room has only a few technicians.
Operating on a computer screen,
You can control such a huge production chain and production system.
In modern production
Labor costs and human resources have been saved a lot, and productivity has been liberated to a great extent.
4.2
Practical experience of Foshan Jiantong Concrete Co., Ltd.
1.
The private enterprise can be seen from many details that this is a private enterprise.
Because private enterprises are not perfect in many aspects.
Yes
The food treatment of employees in private enterprises is not as formal as that of state-owned enterprises and foreign enterprises.
The working environment is relatively poor,
Of course, the working ring
The environment is also related to the different products of enterprises.
From the perspective of corporate culture,
The corporate culture of private enterprises is not clear,
unite
Hard work is a typical slogan of private enterprises, but these two words are too big to see the characteristics of enterprises. From the enterprise
In terms of image building, packaging and public relations, there is indeed a big gap between private enterprises and state-owned enterprises and foreign companies.
2.
Concrete mixing station is not easy to do, and various factors put pressure on the mixing station, which requires great efforts.
Strive to ensure quality,
The supply of raw materials is insufficient,
Market chaos
If the construction party does not follow the normal construction method,
The responsibility has to be pushed to the concrete company.
Practice Report Practice Report Format Practice Report Notes ... Civil Engineering Practice Report ... Accounting Practice Report Computer IT Practice Report ... 3.
Single ready-mixed concrete cannot guarantee the comprehensive competitiveness of concrete enterprises in the market.
Drive hard
Developing new products and new markets can better increase profits and improve the market competitiveness of enterprises.
4.
Have a specific understanding of concrete mixing stations, only know that there is a kind of enterprise called concrete mixing.
Station,
But I don't know what the mixing station mainly does.
What is the technological process?
Today, for this.
Some people have a new understanding,
I also saw the production technology and process of prestressed concrete pipe pile, a concrete product.
Cheng.
Verb (abbreviation for verb) internship task
1.
What raw materials and ingredients are used by Guangzhou Bao Yue Cement Co., Ltd. to produce cement?
What is the composition ratio?
besiege
limestone
88%
reach
92%
iron powder
3%
reach
5%
Si Tong, malm
3%
Left and right wet cinder
2%
About; In all parts of; about
2.
What are the types and characteristics of raw meal mill and cement mill in Guangzhou Bao Yue Cement Co., Ltd.
vertical milling machine
Advantages: high efficiency, energy saving and low noise.
Raw meal grinding system: feeder → roller vertical mill raw meal grinding → cyclone dust removal → raw meal homogenizing bin.
The raw materials slide into the rotating grinding disc through the rotary feeder and valve, are brought under the grinding roller and are ground in pneumatic liquid.
Extrusion of materials under the action of pressure system.
The ground material overflows the material retaining ring,
By hot air passing through the annular nozzle,
The ground materials are dried and sent to the upper efficient cage classifier. Coarse particles return to the grinding disc,
Continue to be grounded,
Fine raw meal enters cyclone through classifier and is collected.
Same rotation blanking
Conveyors, chutes and hoists are transported to the raw meal powder homogenization warehouse.
3.
What kiln type is used by Guangzhou Bao Yue Cement Co., Ltd. to calcine clinker, and what are its advantages?
A: The new dry rotary kiln.
Advantages:
A large number of endothermic decomposition reactions of calcium carbonate are transferred from the area with low heat transfer speed in the kiln to suspension preheating.
In the calciner between kilns.
; .
The raw meal is in a state of suspension or boiling dispersion,
High speed heat transfer,
Fast segmentation
solve
The heat load of the rotary kiln is greatly reduced,
The heat consumption of clinker is greatly reduced,
The production capacity of rotary kiln is greatly improved.
Inferior fuel or municipal refuse can be used as alternative fuel.
4.
What is the technological process of Guangzhou Bao Yue Cement Co., Ltd.? Please draw a block diagram.
5.
What are the raw materials for the production of concrete pipe piles?
Steel plate, thin plate,
personal computer
Steel bar, wire, cement, admixture, sand, gravel, water, concrete admixture.
6.
Pull the concrete mixing station, and the concentration after dust removal is relatively low.
1. 1.3
Laboratory visit
The laboratory is mainly divided into three parts: the command room, the analysis room and the physics room. Chemical analysis rooms usually use standards.
The chemical composition of raw materials is determined by liquid titration, and sulfur, potassium, sodium and coal are detected in the instrument analysis room. at present
The new national standard will also
Chlorine-
As one of the mandatory inspection items. The fluorescence analysis room is used for elements, physics
Inspection room mainly do standard consistency,
Initial setting and final setting,
Inspection of compressive and flexural strength, etc.
The command room is mainly superficial.
Determination of product and fineness, as well as sample preservation room and sample preparation room.
Before and after cement production, all indicators should be determined and tested in the laboratory.
3.2
Foshan jiantong concrete products co., ltd
3.2. 1
company profile
Foshan jiantong concrete products co., ltd mainly produces ready-mixed concrete and pipe pile concrete.
There are four ready-mixed concrete production lines.
It defines its corporate culture as: unity and cooperation, hard work and fruitful results.
The building mainly has a main body and a foundation. Underground is the foundation part, including pipe piles and bored piles, and above ground is
The main part is mainly made of concrete. Bored piles are made of ready-mixed concrete and drilled directly in the ground.
Pipe piles are driven into the ground by piling or pressing into pipe piles manufactured by concrete companies.
Piling is done with firewood.
Oil hammer method,
Low cost,
Unilateral construction,
Construction can be carried out at the corner,
But the noise caused by diesel explosion is very loud.
Construction at night is not allowed.
Pile pressing is a method of static pressure pile construction, which has high construction cost, low noise and little pollution.
Small, because the machine occupies a large position, it is not allowed to construct at the corner.
3.2.2
manufacturing technique
Production technology of concrete pipe pile;
The admixture is mainly ground sand, that is, ordinary sand is ground to a specific surface area.
& gt celebrities
, grinding fine sand
Can be associated with ...
calcium hydroxide
Reaction.
Mark:
phca400
–
95-7
↓↓↓↓↓
Prestressed high-strength concrete pipe pile
a
Outer diameter, wall thickness and length of T-shaped pile
Product performance parameters mainly include:
Outside diameter,
Wall thickness,
Effective prestress,
Vertical bearing capacity,
Anti-crack moment,
Ultimate bending moment, pile weight, concrete strength grade and main reinforcement composition, etc.
Construction conditions of pipe piles:
Suitable terrain conditions:
Pipe pile foundation is suitable for strongly weathered or completely weathered rocks with thick bearing layer at the pile end.
Layer, hard cohesive soil layer, dense gravel soil, sandy soil and silty soil layer.
Inappropriate terrain conditions:
a.
There are many boulders and obstacles in the stratum, and there are hard interlayers, which can't support the force.
Layer area
b.
From soft to extremely hard strata.
,
Most limestone beds also belong to this category.
"Soft on the hard.
,
Soft and hard mutation "
Class
,
But this is not limestone.
,
But other rocks, such as granite,
Sandstone,
mudstone
etc
,
This is extremely unfavorable to the construction of prestressed pipe piles.
Acceptance of pipe piles: static load, generally taken by quality inspection stations.
2.0
The static pressure of pipe pile is twice the design bearing capacity of single pile.
pressure test
;
Determine the defect degree of pile body, and detect the integrity of pile body with low strain and high strain.
Common problems of ready-mixed concrete:
1.
The problem of matching cement and admixture may lead to segregation and poor fluidity after mixing, which is not conducive to
build
The cement is too fine, and the later strength growth is unfavorable, resulting in concrete cracking.
2.
Fine aggregate sea sand will corrode steel bars.
3.
The market of coarse aggregate macadam is in short supply and the competition is great, so we should spend more energy to ensure the quality.
4.
Pay attention to the recycling of wastewater.
5.
Excessive output of additives
6.
Fly ash, slag powder and other additives are in short supply, and the quality cannot be guaranteed.
Common problems in production:
1.
Equipment problem, excessive admixture
;
2.
Human factors, such as wrong declaration, the driver taking the wrong delivery note, and the car wash water not drained.
Problems in the construction process:
1.
Add water to the site at will.
2.
The pouring time is too long.
3.
No maintenance
4.
Catch up with the construction period
Common quality problems of concrete:
1.
clotting time
2.
Crack problem
3.
Strength quality
Concrete production process:
Mixing station type:
promotion
(
quick
)
Secondary lifting
(
Raw materials such as sand and gravel fall into the weighing hopper once and enter the mixing station through secondary lifting.
)
Process: input production tasks → centralized control of ingredients, raw materials entering the factory, mixing time and transportation mode.
→ mixer truck transportation → construction site
Fourth, internship experience and feelings
4. 1
Practical Experience of Guangzhou Bao Yue Cement Company
1.
state-owned enterprise
State-owned enterprises pay attention to identity, and personnel managers have repeatedly stressed that they are central enterprises, surpassing the most cattle state-owned enterprises.
In state-owned enterprises
People who do personnel usually have a good temper and a long life.
50
/kloc-Middle-aged and elderly people around 0/8 years old.
2.
Cement plants around the city
Because of the high comprehensive cost, cement plants around the city are no longer suitable for competition through large output.
The route of struggle,
Cater to the needs of urban development and government,
Help the city deal with garbage,
Environmental protection to reduce energy consumption
Route, take the road of circular economy, and earn government money is king.