Construction of gyratory crusher

Efficient jaw and primary gyratory crushers

Nordberg C Series jaw crushers SBM has installed over 10,000 jaw crushers since the 1920s. Today Nordberg C Series jaw crushers are the world’s leading choice of jaw crusher for heavy-duty use. Nordberg C Series jaw crushers are available in stationary, portable and mobile applications. They are suitable for all primary crushing needs from quarrying to contracting, and from extremely hard rock to recycling materials.

All C Series jaw crushers have the same main elements: a sturdy, high-quality cast steel pitman combined with a modular frame construction. The state-of-the-art frame has two hot-rolled steel side plates joined to high-quality cast steel frames through robust, precision machined bosses secured with bolts.

The non-welded, pinned and bolted frame construction and compact size provide for excellent transportability and give the C Series excellent flexibility in underground mining applications. The non-welded frame also offers superior reliability and allows higher reduction ratios. Nordberg C Series crushers are available in 12 models with capacities ranging from 40 to 1225 mtph (45 -1350 stph). primary gyratory crushers SBM offers a complete range of primary gyratory crushers to meet every application requirement. Standard features of the Nordberg SUPERIOR® include a dual counter balance arrangement that minimizes the dynamic forces transmitted to your supporting structure. This means all SBM gyratory crushers are suitable for any type of installation: stationary, semi-mobile or mobile.

World patented features include the large diameter upper journal main shaft with a replaceable alloy steel threaded main shaft sleeve. Nordberg SUPERIOR® is designed to provide maximum strength for the continuous impact forces and stresses associated with crushing and to give full protection against main shaft damage, thereby eliminating costly repair or replacement.

The hydraulically operated and controlled system provides quick and easy adjustment of the main shaft/mantle to compensate for wear and to maintain the required setting. A main shaft position indicator system is included which can be regulated independently or through any PLC system.

Stone Crusher Machine

In mining operations, the layout of crushing plants and ancillary equipment and structures is a crucial factor in meeting production requirements while keeping capital and operational costs to a minimum. This paper addresses the critical design parameters as well as the consideration of ore characteristics, geographical location, climatic conditions, expected operational life, expansion potential, safety, environment, and operability and maintainability.

INTRODUCTION

The fundamental goal for the design of a crushing plant is an installation that meets the required production requirements, operates at competitive cost, complies with today’s tough environmental regulations, and can be built at a reasonable price despite the rising costs of equipment, energy and construction labor. The following industry trends must be taken into account:

• Equipment suppliers are offering ever-larger primary crushers, with 1,800 mm (72 in) gyratories expected soon, as well as secondary and tertiary machines of up to 3,000 mm (120 in).

• Rising energy costs are causing owners to increase the integration of mine and mill design, so that they can identify ways of reducing overall electrical power consumption.

• Electronic control of crusher discharge opening and feed rate. With adjustment of a crusher’s discharge opening, as the production continues through an on-line coarse size analysis of the crushed product (digital image analyses). Dance, A. 2001)

• More attention is being paid to the impact on crushing circuit design caused by variations in ore characteristics, size distribution, moisture content, ore grade and climatic conditions.

• Operators have always dreamed of reducing the need for crushing equipment; when SAG mills were first introduced, it was hoped that they would eliminate secondary and tertiary circuits. As it turned out, designers are now adding secondary or pebble crushers to SAG circuits, on both greenfield and retrofit projects, to increase feed rate to the SAG mill. In other words, crushing plants, from primary to quaternary circuits, are here to stay.

There are three main steps in designing a good crushing plant: process design, equipment selection, and layout. The first two are dictated by production requirements and design parameters, but the layout can reflect the input, preferences and operational experience of a number of parties. These can include the owner’s engineering staff, safety personnel, operations and maintenance personnel, equipment manufacturers, and the engineering consultant. Ideally, the consultant combines his knowledge and experience with an understanding of all parties’ needs, to provide a balanced, workable, safe and economic plant design.

Hot Products

Crusher machine is SBM Machinery's special equipment type, it can take the functions of the above machines together in order to make a more convenient products experience.

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