Method for processing granulated slag dump nickel production

 

(57) Abstract:

The invention relates to the utilization of granulated slag and can be used for extraction of Nickel, cobalt and other valuable components from granulated slag dump Nickel production, as well as in the production of building materials. Method for processing granulated slag dump Nickel production includes drying, separation of slag into fractions and subsequent magnetic separation, drying is carried out in the environment of a reducing gas, after which the slag is separated into three fractions: +2 mm -2 to +0.4 mm and -0,4 mm and separately sephirot faction -2 - +0,4 -0,4 mm and mm, which ensures a more rich in metals concentrates, thus avoiding surgery for crushing slag, used a cheaper and convenient way of fractionation - screening, that simplifies the method for processing granulated slag Nickel production and makes it profitable.

The invention relates to the utilization of granulated slag and can be used for extraction of Nickel, cobalt and other valuable components from granulated slag dump Nickel production, as well as in the production of stroiizdat, selected as a prototype, including drying, grinding in a ball mill for 60-90 with subsequent air separation emitting products classes +1.8 mm, is 1,8 mm +0.15 mm, -0,15 mm and magnetic separation joint of product class - 1.8 and +0.15 mm with obtaining magnetic and non-magnetic products (ed. St. USSR 1779064, With 22 In 7/04, "Method for processing granulated slag dump Nickel production", publ. 27.01.95), adopted as the nearest equivalent.

The disadvantages of this method are its multi-stage and unprofitable.

The problem faced by the inventors is the creation of a simple cost-effective method for processing granulated slag with obtaining a highly concentrated magnetic concentrate.

A method for processing granulated slag dump Nickel production, including drying, separation of slag into fractions and subsequent magnetic separation, in which new is that the drying is carried out in the environment of a reducing gas, after which the slag is separated into three fractions: +2 mm -2 to +0.4 mm and -0,4 mm and separately sephirot faction -2 to +0.4 mm and -0,4 mm

Laboratory and industrial tests offer the reception of the magnetic concentrate is 2.3 to 2.4%, while in the proposed method may receive two types of concentrates: 1 containing 5% Nickel and 0.5% cobalt, 2 - containing 1% Nickel and 0.1% cobalt. The higher the metal content in concentrate, the more valuable it is for further production. Experiments have shown that metals are practically absent in fractions larger than 2 mm and magnetic separation impractical. In addition, drying of the slag prior to separation in the presence of a reducing gas increases its magnetic susceptibility.

When conducting a search of the patent and scientific and technical information was not found solutions containing a set of proposed features that allows us to conclude that the criterion of "novelty" and "inventive step".

The proposed method is as follows. Granulated slag Nickel production serves on the plot, where they perform drying in the environment of a reducing gas, after which make a separation into fractions, for example, by screening. Get slag fractions +2, -2 - +0.4 and-0.4, and the fraction of -2 to +0.4 and-0.4 mm separate streams directed to magnetic separation to produce two types of concentrates, one of which contains 1% Nickel and 0.1% cob is, are environmentally friendly and can be either sent to the dump, or to serve as a product for the manufacture of concrete, abrasive powder etc.

Example. Granulated slag after cooling in the water served in the drying unit, which direct gas-reducing agent, such as methane, and then sent to the classifier, namely dvuhmetrovoy rumble, where they perform the sieving into three fractions. Slag fractions of size -2 to +0.4 mm and -0,4 mm separately directed to magnetic separation, for example, by means of a separator PBSC - 90/60, and remaining on the sieve slag, and the slag after magnetic separation is directed either to the dump, or to use any known technology.

Using the proposed method allows to obtain more expensive, more rich in metals 5% Nickel, 0.5% cobalt and 1% Nickel and 0.1% cobalt concentrates, thus avoiding surgery for crushing slag, used a cheaper and convenient way of fractionation - screening, which simplifies the method for processing granulated slag Nickel production and makes it profitable. In addition, the quality of the separation of slag on the magnetic and nonmagnetic fractions for improving Scheufele.

Method for processing granulated slag dump Nickel production, including drying, separation of slag into fractions and subsequent magnetic separation, characterized in that the drying is carried out in the environment of a reducing gas, after which the slag is separated into three fractions: +2, -2-+0.4 and-0.4 mm and separately sephirot faction - 2 - +0.4 and-0.4 mm.

 

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