What is circulation ratio and circulating load of a mill

Assignment Help Other Engineering
Reference no: EM132505672

Mineral Processing

Problem 1

A hydrocyclone is classifying material as shown below:

565_figure.jpg

What % of the feed material will be classified?

Problem 2

What is circulation ratio and circulating load of a mill if the hydrocyclone underflow is regrind in the mill. The operation parameters of the hydrocyclone are shown below:

1855_figure1.jpg

Problem 3

The volume flow rate of pump fed to a hydrocyclone was 129 L/min. Its solid content was held at 32% by volume. Samples of the feed, under flow and over flow streams were taken simultaneously, dried and a size analysis carried out. The results obtained were:

Underflow rate = 30 L/min Overflow rate = 99 L/min

 

Particle Size

 

µm

Feed Mass

 

%

Underflow Mass

 

%

Overflow Mass

 

%

+212

 

-212+150

 

-150+106

 

-106+90

 

-90+75

 

-75+63

 

-63+53

 

-53+45

 

-45+34

 

-34

2.6

 

8.9

 

22.1

 

10.8

 

7.9

 

7.8

 

5.8

 

4.8

 

6.5

 

22.8

6.24

 

18.77

 

42.59

 

13.99

 

7.26

 

4.77

 

2.57

 

1.22

 

0.83

 

1.75

0.0

 

0.4

 

2.8

 

6.8

 

8.3

 

9.4

 

6.0

 

5.7

 

10.4

 

50.23

Draw a partition curve and determine:

a) Cut point(d50)
b) Watersplit
c) Corrected cut point(d50°c)
d) Imperfection.

Problem 4

A hydrocyclone classifier is fed with quartz slurry at the rate of 20.8 t/h from a grinding mill. The underflow is recirculated. The screen analysis of each stream were determined with the following results:

 

Size,

 

µm

Feed Mass,

 

%

Overflow Mass,

 

%

Underflow Mass,

 

%

+300

 

-300+250

 

-250+150

 

-150+106

 

-106+75

 

-75

25

 

15.3

 

11.6

 

12.8

 

9.6

 

25.7

0

 

0

 

0.2

 

5.4

 

18.3

 

76.1

33.2

 

20.3

 

15.4

 

15.2

 

6.7

 

9.2

Determine:

a) The circulationratio
b) The efficiency of thecyclone.

Reference no: EM132505672

Questions Cloud

What is the interest portion of the first 12 payment : George bought a new car with a 4.1% interest rate for 5 years. The loan is for $35,000. What is the interest portion of the first 12 payment?
Explain the four steps in the systems model of tandd : Explain the four steps in the systems model of T&D? Discuss how HRIS applications can assist is carrying out the steps on the systems model.
Where do get visions of the ideal today : Is this work boring? If you were trying to convince a friend that it was interesting, how would you go about it? What would you say?
Net present value of the investment-yama industries : What is the net present value of the investment, assuming the required rate of return is 6%? Would the company want to purchase the new machine?
What is circulation ratio and circulating load of a mill : Determine The circulationratio and The efficiency of thecyclone - What is circulation ratio and circulating load of a mill if the hydrocyclone underflow
How was the work used in the cultures spiritual : How does this work formally represent (make visible) certain religious, spiritual, scientific or civic ideas? How was the work used in this culture's spiritual
What is the most logical explanation : What is the most logical explanation for a +2.0% return on a stock with a beta of 1.0 in a month where the market returned +1.0%?
Return investors require from hightech : If the risk free rate is 5.2% and the market risk premium is 7.1% what is the return investors require from HighTech?
Develop the job title and essential duties for new position : Develop the job title and essential duties for the new position. Write detailed job description suitable for listing on the organization's website.

Reviews

Write a Review

Other Engineering Questions & Answers

  Characterization technology for nanomaterials

Calculate the reciprocal lattice of the body-centred cubic and Show that the reciprocal of the face-centred cubic (fcc) structure is itself a bcc structure.

  Calculate the gasoline savings

How much gasoline do vehicles with the following fuel efficiencies consume in one year? Calculate the gasoline savings, in gallons per year, created by the following two options. Show all your work, and draw boxes around your answers.

  Design and modelling of adsorption chromatography

Design and modelling of adsorption chromatography based on isotherm data

  Application of mechatronics engineering

Write an essay on Application of Mechatronics Engineering

  Growth chracteristics of the organism

To examine the relationship between fermenter design and operating conditions, oxygen transfer capability and microbial growth.

  Block diagram, system performance and responses

Questions based on Block Diagram, System Performance and Responses.

  Explain the difference in a technical performance measure

good understanding of Mil-Std-499 and Mil-Std-499A

  Electrode impedances

How did this procedure affect the signal observed from the electrode and the electrode impedances?

  Write a report on environmental companies

Write a report on environmental companies

  Scanning electron microscopy

Prepare a schematic diagram below of the major parts of the SEM

  Design a pumping and piping system

creating the pumping and piping system to supply cool water to the condenser

  A repulsive potential energy should be a positive one

Using the data provided on the webvista site in the file marked vdw.txt, try to develop a mathematical equation for the vdW potential we discussed in class, U(x), that best fits the data

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd