the higher the work index the more work required to crush the rock. the amount of energy it shows for example, that their is more energy required to crush basalt then iron ore. work index: contact us, we will do the calculations for you.

hello everyone, i am dealing with the calculation of bond work index. typically this means circulating loads of 250, but can go to over 400 for maximum -the f80 and p80 are obtained by a sieve size analysis of the ore sample

bond work index procedure and method this grindability test or bond ball mill work i am trying to determine ball mill work index for a very soft . the bond work index is defined as the kilowatt-hours per short ton required to break from

this grindability test or bond ball mill work index procedure is used to determine the bond work index of minus six mesh or finer feed ore

are the old allis-chalmers abrasion index and calculations for steel balls and theoretical consumption calculated by the bond formula for ball mills; for sag mills the most difficult is to recover balls into the mill (is a very hard work), once

barratt (1986) proposed the use of an empirical formula for predicting sag power involving the use of a submitted to the bond ball mill work index test.

3. keywords. autogenous grinding (ag), ball mill, bond work index sabc circuit. with reference to the worked examples in annex c, the.

it starts with bond's work index equation: for example, a grinding circuit is processing 450 t/h (of dry feed) with a mill drawing 3,150 kw (at the pinion). the work index always means the equivalent amount of energy to reduce one ton of the

this is because the interest rate (coupon) on a variable rate bond adjusts to current the discount margin is one of the most common calculations: it estimates the security's spread above the reference index that the discount margin formula is a complicated equation that takes into how bond market pricing works.

the bond equivalent yield is used to determine the annual yield on a discount bond. in this lesson we will discuss its formula, look at some

a bond's ytw is calculated based on the earliest call or retirement date. it is assumed that a prepayment of principal occurs if a bond issuer uses the call option.

(an example calculation is given in chapter 7.) a variety of correction factors (ef) have been developed to adapt the bond formula to situations not included in the

bond futures oblige the contract holder to purchase a bond on a specified date at a predetermined price. examples of underlying assets for bond futures include: 13-week treasury bills (t-bills); 2-, the price of bond futures can be calculated on the expiry date as: price = (bond how commodity futures contracts work.

yield to maturity (ytm) is the total return expected on a bond if the bond is held until maturity. the formula to calculate ytm of a discount bond is as follows:.

section 3 covers bond level calculations such as accrued interested, bond which are accounted for the total return index formula in section 2.1.1. 1. accrued

the calculation of the index value comes from the prices of the underlying holdings. is a leading provider of market indexes with the bloomberg barclays u.s. aggregate bond index serving as for example, investors seeking to build a balanced portfolio of u.s. stocks and bonds could how does the dow jones work?

the relative strength index (rsi) is a momentum indicator that measures the the rsi is computed with a two-part calculation that starts with the following formula: in essence, the macd works by smoothing out the security's recent price

in this lesson, we will learn how to calculate holding period returns and several formulas will be presented with examples that work through

no general work index formula governing energy use over a range of conditions, like the bond equation for intermediate grinding, has yet been

guide to duration formula. here we discuss how to calculate duration of bond using practical examples and downloadable excel template.

market capitalization is derived from the value of outstanding shares. the investment community can use market capitalization to determine a company's size, as

the formula for calculating a yield maintenance premium is: yield when a borrower obtains financing, either by issuing bonds or by taking out a loan (e.g.,

how does a bond work? rebekah wants to expand her travel agency business, so she asks each investor to pay her $1000. she promises to

duration indicates the years it takes to receive a bond's true cost, weighing in the present value of all future how duration works the modified duration of a bond with semi-annual coupon payments can be found with the following formula:.

examples of the variation in work index at centerra's mount (mt.) milligan given as equation 1, and is often referred to as bond's equation or bond's law..

irr calculations rely on the same formula as npv does. excel does all the necessary work for you, arriving at the discount rate you are seeking to find. stock, bonds, and any other long-term debt, are included in a wacc calculation. the profitability index (pi) rule is a calculation of a venture's profit potential, used to