Rock gold ore processing plant

The plant mainly includes four parts:

First part is crushing, typically by two or three stages of crushing, like primary jaw crusher, secondary jaw crusher, and cone crusher, it reduces gold rock sizes from hundreds of millimeters to less than 25 millimeters.

Second part is grinding, gold ores will be sent to ball mill for grinding, this process makes the useful mineral of gold fully free from tailing, thus can be separated by mineral separators in next stage. Spiral classifier or hydraulic cyclone are used with the ball mill to form a closed grinding circuit. Larger size minerals will be sent back for grinding again, while smaller ones will be overflowed to next stage

Third part is mineral separation, by use of mineral separator, typically gold centrifugal concentrator or sluice chute, and shaking table can extract the gold concentrate. Centrifugal concentrator or sluice chute is primary process while shaking table is for refine process.

Final part is extract gold and smelting. By use of mercury to extract gold, then with the smelting furnace can make gold bars.

Definitions of Aggregate, Sand, Gravel, Crushed Gravel, Crushed stone, Rock, and Slag

AG AGGREGATE is made up of inert material such as sand and gravel, crushed stone or slag, which when bound together into a conglomerated mass by a matrix forms concretes, mortars, plaster and mastics such as black top or macadam roads and asphalt road surfaces.

SDSAND is a finer granular material (usually lass than 1/4″ in diameter) resulting from the natural disintegration of rock or from the crushing of friable sandstone rock or other suitable rocks.

GLGRAVEL is a coarse granular material (usually larger than 1/4″ in diameter) resulting from the natural erosion and disintegration of rock.

CGCRUSHED GRAVEL is the product resulting from the artificial crushing of gravel with most all fragments having at least one face resulting from fracture.

CSCRUSHED STONE is the product resulting from the artificial crushing of rocks, boulders or large cobblestones with the fragments having all faces resulting from the crushing operation.

RKROCK, from which crushed stone, sand and gravel are made and the rock most suitable for making good aggregates is formed all over the world. See physical properties table for the various kinds of rocks and their physical properties.

SLSLAG is the air-cooled, non-metallic by-product of a blast furnace operation consisting essentially of silicates and alumina-silicates of lime and other bases which is developed simultaneously with iron in a blast furnace. Naturally, it is only available in those localities where pig iron is produced.

Jaw crusher introduction

The distinctive feature of this class of crusher is the two plates which open and shut like animal jaws. The jaws are set at an acute angle to each other, and one jaw is pivoted so that it swings relative to the other fixed jaw. Material fed into the jaws is alternately nipped and released to fall further into the crushing chamber. Eventually it falls from the discharge
aperture.

Jaw crushers are classified by the method of pivoting the swing jaw (see attached figure). In the Blake crusher the jaw is pivoted at the top and thus has a fixed receiving area and a variable discharge opening. In the Dodge crusher the jaw is pivoted at the bottom, giving it a variable feed area but fixed delivery area. The Dodge crusher is restricted to laboratory use, where close sizing is required, and is never used for heavy-duty crushing as it chokes very easily. The Universal crusher is pivoted in an intermediate position, and thus has a variable delivery and receiving area. Read more