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CEBU INTITUTE OF TECHNOLOGY - UNIVERSITY CEBU CITY

MINING ENGINEERING DEPARTMENT

MET 422MINERAL PROCESSING (LAB)

JON LOUIE CAMINERO_ 8/2/2012_______

BSEM 4 ENGR. SAMUEL O. TAGSIPInstructor

EXPERIMENT No. 1

I.TITLE: River and Crushed aggregates preparation for processing and laboratorytesting

II.OBJECTIVES:1.To familiarize the type of materials and apparatus utilized to obtain a

representative sample.2.To know the appropriate steps in physical preparation of sample

materials in its desired size distribution composition.3.To know the basic procedure on how to mix homogeneously and to

reduce the size of the sample for laboratory testing.

4.To be able to calculate the moisture content and the size distributionanalysis.

III.EQUIPMENT/APPARATUS:Weighing scale (10 kg. capacity)Weighing pan (200 gm. capacity)Jones splitterSmall shovelBig shovelSieve screensSample pickSpatula

BinSample canvasSample bag

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IV. PROCEDURE:

PROCESS FLOW SPECIFIC ACTIVITIES WORK INSTRUCTION

1. Get a sample materialabout two (2) kilograms.

2. Prepare a clean tarpaulin /plastic sample canvas thatcan accommodate two (2)kilograms sample material.

3. Check the presence ofcontaminants in aquartered sample. If foundany, remove it quickly.

4. Using weighing scale,weigh the sample andrecord it as Weight Initial(Wi).

5. Using oven, heat thesample to 105oC for 5hours to drive off moisturethoroughly.

6. Using weighing scale,

weigh again the sampleand record it as WeightFinal (Wf).

7. Moisture% = Wi-Wf x 100Wf

8. At a designated individualsieve assignment, placethe sample on the top ofscreen while the wholesieve is underneath withsample canvas. Then start

the shaking and until no

1.1 Inspect the presence of anycontaminants, and if found,

neatly remove it using smallshovel or spatula.

2.1 Clean thoroughly the samplecanvas to be free from anycontaminant.2.2 Place the sample on themiddle of the canvass.2.3 Hold the opposite corner ofthe canvas and roll up to mix thesample. Do the same alternately

with the other two oppositecorners of the canvas until thesample homogeneously mixed.2.4 After mixing, cone the sampleby pouring it to another canvasthen quarter it using any plane.2.5 Take out the two oppositeportion and store the remainingpart.2.6 Repeat the 2.4 and 2.5 untilthe desired more or less 0.5 kg. ofsample is obtained.

5.1 In placing the sample insidethe oven, be sure to attain 105oC.

6.1 Cool the sample and weigh.

7.1 Record the Moisture contentof the sample.

8.1 Shake the sieve screen in alldirections and take care the top lidmaterials not to spill out.

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SAMPLE SIZEREDUCTION (BY

CONING &QUARTERING)

SAMPLE WEIGHING

CONTAMINANTSCHECKING

WEIGHING

DRYING

WEIGHING

SIEVE SHAKING

CALCULATION

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more material pass troughthe screen sieve.

PROCESS FLOW SPECIFIC ACTIVITIES WORK INSTRUCTION

9. Remove the top lid samplecarefully and collect it in a pan.Weigh it on the pan balance.

10. Calculate the screenedsamples size distributionpercentage by:

Size distribution = Weight ofsample per sieve over the totalweight of sample multiply by100%.

SD% = W (sample/sieve) x100TTL W(sample)

11. Record the computedpercentage.

9.1 Apply the same procedure to

all screen sieves used.9.2 Record the sample weight as___ mesh.

10.1 In calculation, take note thatthe total weight including moisturecontent will be lesser than orequal to the total weight of samplein 2.5.

11. Record the computedpercentage in the correspondingmesh no. in 8.1.

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SIZEDISTRIBUTIONCALCULATION

WEIGHING

RECORDING

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V. DENITION OF TERMS:

1. Coning and Quartering

2. Sizing

3. Screen/Sieve

4. Moisture Content

5. Size distribution

VI. DATA AND RESULTS:

VII. GRAPH:

VIII. OBSERVATIONS:

IX. CONCLUSIONS:

For the Conclusion: please do research to answer the following:1. How to conduct screen/sieve sizing?2. Explain the moisture contents of Ore material, its retention and absorption

characteristics.3. The importance of Size Distribution Analysis.

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X. REFERENCES:

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