sbmzhcn Blog find crusher and grinding mill in China

May 31, 2012

How does a rock crusher work

Filed under: Uncategorized — sbmzhcn @ 6:28 pm

Rock crushers Defined

A rock crusher is a device used to crush rocks into smaller pieces, usually for gravel or some other road or building application. Most rock crushers have a hopper at the top — a container which holds the rock above the crusher and uses gravity to feed it in. Alternately, rock crushers can use a belt drive to continuously transport the rock into the crusher. At the bottom of nearly every type of crusher is a hole. Once a rock has been pressed into small enough pieces to fit through the hole, it exits the crusher either onto, a conveyor belt, into a bin or onto a large pile. In some cases, one rock crusher may feed directly into a second one, crushing the rocks up into finer and finer particles in two or three stages.

jaw crusher

jaw crusher s are the oldest and one of the simplest sorts of rock crushers. A jaw crusher is like a giant collapsible V made out of two metal walls. At the bottom, the two walls are very close together and at the top they are further apart. One wall is held still while the other is closed against it — usually about three times a second. When it closes, the jaw crushes the rocks inside it. Because it tapers, the rocks are crushed to smaller and smaller sizes as they go down, then dropped through the bottom.

Roller Crusher

Another common type is the roller crusher. The roller crusher is a set of two large metal rolers rotating in opposite directions. Rocks are fed into the space between the two rollers, where they are crushed and then dropped to the ground. Roller crushers are often used as a secondary crushing stage. Small, pre-crushed rocks are inserted into the roller, which then breaks them down into gravel.

Gyratory and Stone Crushers

Gyratory and cone crushers work in pretty much the same way, although they have slightly different designs. The rock falls into the top of a chamber with a spinning grinder at the bottom. As the rock falls down, it is squeezed between the grinder and the walls of the chamber and crushed. As it continues to fall down the chamber, it is pulverized into smaller and smaller bits until it falls out the bottom.

May 30, 2012

HAZEMAG Unirotor and Novorotor hammer mill

Filed under: Uncategorized — sbmzhcn @ 6:41 pm

Hammer Mill Applications:

Examples of the fields of applications of our hammer mills are operations in the raw materials processing, recycling and chemical industries. The long list of materials processed includes limestone, fertilizer, lignite, dolomite, rock salt, electronic waste and metal shavings, to name just a few. Depending on the intended use and the model of hammer mill selected, the achievable product size of the crushed material lies between 1 mm and 6mm, based on a feed size of 40 – 250 mm and a feed rate of up to 300 tons/hour.

HAZEMAG Unirotor and Novorotor hammer mill

HAZEMAG Unirotor and Novorotor hammer mill

HAZEMAG Unirotor and Novorotor hammer mills are ideally suited to processing applications such as the fine crushing or grinding and drying of soft to medium-hard raw materials and recycled products. HAZEMAG hammer mills are renowned for their reliability, efficiency and are extremely versatile and adaptable to the most complex of processing demands.

sandstone washer
compound fertilizer line
organic fertilizer line

Harison Cone Crusher

Filed under: Uncategorized — sbmzhcn @ 10:47 am

Harison cone crusher

A Harison Cone Crusher is one of the main types of secondary crushers in a mine or ore processing plant.

Harison cone crushers are designated in size either by the gape and mantle diameter or by the size of the receiving opening. Our product cone crushers can be used for secondary crushing. The company product is easy maintenance with hydraulics adjustment and lifting.

Harison Cone Crusher Feature

Excellent product distribution and fineness.
Low operation costs and easy wear parts replacement.
Easy maintenance with hydraulics adjustment & lifting.
High manganese mantle & concave.
Strong counter shaft design with bevel gear & pinion.
Strong body with heat treatment.
Hydraulic Clearing.
Hydraulic Adjustment.
Heavy Duty Design.
High Productivity.
Long Life.
Standard Replacement Parts.
Cost Effective.

May 29, 2012


Filed under: Uncategorized — sbmzhcn @ 6:24 pm

A hammermill crushes material that is friable, by impacting it against a rotating hammer (typically traveling between 750 RPM and 1800 RPM). Then the material is forced against a rugged solid plate called a “breaker plate” which further degrades the particle size. Finally, the material is forced over a discharge grate by the hammers, where crushed finer particles drop through the discharge grate and larger particles travel around for another crushing cycle, until they fall through the discharge grid. During the entire time the material is traveling around in the hammermill it is constantly being impacted by the hammers, and the side of the mill casing, causing breakage of the particles. This sequence repeats itself between 750 – 1800 times each minute, until the particle is ground fine enough to fall through the discharge grid.

One big drawback to hammermills is they wear, due to the abrasiveness of the material being crushed and the high speed of the mill. It should not be used to grind any material harder than a medium hard limestone. They are used most in crushing coal, but are also common in limestone operations. Large particles can not usually be crushed in hammermills, so they are almost never used for run of mine material or primary crushers, but secondary or tertiary crushers. Six to eight inches is a typical top size of feed for hammermills.

Another possible drawback for using hammermills, is that they tend to produce a lot of fine material (50 mesh to -100 mesh). Crushers like jaw crusher s, cone crushers, and roll crushers, which operate a much lower speeds, tend to produce very few fines (generally less than 1% finer than 50 mesh). For some processes, excess fine material is a drawback, for others, it is not a problem.

On the positive side, hammermills are relatively inexpensive, as crushers go, can produce relatively fine material (1/4″ to -10 mesh) from 6″ or 8″ feed in one step, and they take up relatively little floor space. The are easily repaired, and simple to operate. Production size hammermills can produce products ranging from 1″ to as fine as 10 mesh, or finer, depending upon the material being crushed.

Hammer crushers for fine and medium crushing

Filed under: Uncategorized — sbmzhcn @ 10:17 am

PSP Engineering supplies hammer crushers for fine and medium crushing of soft and medium hard, non-sticking materials such as limestone, gypsum, slate, burned lime, bituminous coal and other materials of similar properties. Hammer crushers for a wide range of capacities can be found in the cement industry where ball mills are part of the grinding plants, in desulphurization lines and lines producing plaster mixtures.

The exceptional operating properties of hammer crushers are:

Hammer Crusher

hammer crusher

1. High operating reliability
2. Low cost for operating and maintenance
3. High throughput
4. Long service life of main crushing elements

Crushers for fine and medium crushing are designed with reverse operation of the rotor and hammers. The design of the inlet chamber, rotor with staggered hammers and smooth grate surface have a favorable influence on the crusher capacity. The design of the crusher housing (its tipping part) allows simple and quick access to important parts of the crusher for maintenance.

Impact plates can be rearranged either in a closed path or in an open path. The machine can be supplied with a common base frame for the crusher and drive which shortens the installation time of the crusher. The frame can be supplied with a flexible seating to reduce the dynamic forces on the foundations.

PSP Engineering a.s. is a leading supplier of specialized products and entire processing plants for the building material and mineral processing industries. PSP Engineering has been involved in the design and construction of cement plants, lime works, quarry and crushing plants, as well as gravel and sand pits for more than 50 years.

May 28, 2012

Gypsum crushing plant project case Image picture

Filed under: Uncategorized — sbmzhcn @ 10:20 am

Gypsum crushing plant project case Image picture

Gypsum crushing plant project case Image picture

Gypsum crushing plant project case Image picture

coal crushing plant in india
rock crusher manufacturer india
stone crusher machine manufacturer in india

May 27, 2012

Grinding Mill Reline and Plant Maintenance Services and Personnel

Filed under: Uncategorized — sbmzhcn @ 6:24 pm

Pacific Relines is a progressive Australian-based enterprise which specialises in all facets of grinding mill maintenance and general engineering. The company was established in 1996 and currently undertakes around 100 mill reline projects each year. Now a member of ATIVO, Pacific Relines is able to partner with the company to provide a unique end-to-end solution, including shutdown services, maintenance and project services.

Grinding Mill for Stone

Grinding Mill for Stone

Pacific Relines has extensive mining industry experience supplying crews and equipment to undertake relining and other maintenance on AG, SAG, ball and vertical grinding mills, crushers, scrubbers, Apron feeders, screens and conveyors.

Pacific Relines specialises in the following key areas:

  • Liner change-outs (steel, rubber and composite)
  • Backing rubber replacement
  • Trunnion liner and trommel change-outs and repairs
  • General plant maintenance and repairs
  • Shutdown executing and planning
  • New installations
  • Decommissioning and dismantling of plant and equipment

Plant maintenance and shutdown planning

The key to successful plant maintenance shutdowns is planning. As the mill reline work is often the critical path task on a shutdown, Pacific Relines develops a detailed plan for each project to maximise the effectiveness of available resources to minimise total project time.

This plan is presented to the principal for examination and comment in the lead-up to the project and a detailed report is presented to the principal upon the completion of each project. Progress outcomes, safety issues and recommendations for future projects are covered in the completion report.

Remote area and rapid mobilisation specialists

Pacific Relines is a remote area mill reline specialist, supplying maintenance and shutdown services to regional mining sites nationally and internationally. Pacific Relines has unrivalled experience and expertise in the logistics of mobilising our specialised reline crews to an operation for scheduled and unscheduled maintenance.

Pacific Relines operates our own company aircraft, providing valuable flexibility and an ability to mobilise direct to site and at short notice if required.

Safe grinding mill reline services

Pacific Relines considers the occupational health and safety of all personnel associated with our operations to be of the utmost importance in the conduct of our business. With our objective of zero harm, we have consistently improved our performance by reducing injuries in the workplace.

To that end, we have a documented safety management system in place that covers the specific requirements of mill maintenance as well as more general areas of plant maintenance. Safety systems are certified to AS / NZS 4801:2001.

Accredited mill reline specialists

Pacific Relines personnel have many years of experience in the delivery of mill relining. We have senior crew members with extensive experience spaning mines, installation, mechanical and civil works for the utilities industry, some of whom have in excess of 15 years’ experience with the company. Pacific Relines will provide experienced project management, site management, site supervision, and qualified tradespeople and trades assistants.

Personnel have received the following training as a minimum requirement:

  • Generic mine induction metalliferous surface
  • QMITAB – generic mine induction
  • Work in confined space training

Our company operates a training programme to ensure that all personnel are kept up to date with these requirements. In addition to the above, a wide range of competencies are held by company personnel, including:

  • Project managers and supervisory personnel
  • Mechanical fitters
  • Boilermakers
  • Electricians
  • Riggers / dogmen
  • Forklift operators
  • Crane operators
  • Linerhandler operators
  • Aircraft pilots

Liner changeouts, and backing rubber replacements and repairs

Pacific Relines’ range of grinding mill maintenance services includes liner changeouts (steel, rubber and composite), backing rubber replacement, trunnion liner and trommel changeouts and repairs, labour hire and new installations.

Specialist mill reline equipment and tooling

Pacific Relines designs and manufactures a range of specialist tooling and equipment for mill reline purposes. Pacific Relines crews have extensive experience in the operation of all types of reline equipment, including Russell Mineral Equipment and McLennan.

Small liner handlers for mill relines

Most recently, Pacific Relines has developed and built a number of small liner handlers as retrofit machines in existing plants. These have been developed in response to legislative requirements on lifting and the tendency toward larger heavier liner components.

Pacific Relines’ grinding mill service is a tailored solution designed to meet our client’s specific needs. We offer planning support and accredited supervised work crews complete with specialised tooling and logistical support. For further information on Pacific Relines, please visit our website or contact us directly.

PACIFIC RELINES: A progressive Australian business which specialises in all facets of grinding mill and crusher maintenance

Established in 1996, PACIFIC RELINES supplies personnel and equipment to reline grinding mills and crushers at hard rock mining sites such as gold, copper, lead, silver and zinc mines. PACIFIC RELINES currently undertakes around 120 mill reline projects each year in Australia and internationally, including PNG, South Africa and Oman.

Pacific Relines have extensive experience working on international projects and can mobilise teams of experts to any corner of the world. We have a solid track record of moving work crews in and out of PNG, South Africa, West Africa and other remote locations. Recent projects have taken us to Cote D’ivoire, Oman and most of Asia, but wherever we work our high work standards remain the same.

PACIFIC RELINES specialises in the following key areas:

  • Liner change outs
  • Backing rubber replacement
  • New installations
  • Remote Area Specialists
  • Trunnion liner & trammel change outs and repairs
  • Decomissioning , Dismantling and relocation of plant and equipment
  • Rapid Mobilisation – The operation of a company plane affords the ability to mobilise direct to site at short notice if required.
  • Overhauls on Crushers, Chain and Box Feeders, Launders, Scrubbers and Driers.

May 21, 2012

Granite crusher brief introduction

Filed under: Uncategorized — sbmzhcn @ 6:39 pm

Brief Introduction Granite crusher

Granite crusher

Granite crusher

Granite crusher is widely used in multitudinous departments, such as mining, metallurgical industry, building material, highway, railway, water conservancy industry and chemical industries. It could deal with materials which has a length within 100-500 millimeters. Its maximum compressive strength could reach 350 mpa. And it has many advantages such as bigger crushing ratio, the broken materials could turn into cube particle etc.

Usage and usable range

Granite crusher is widely used in crushing and reshaping of hard materials which coud be applied in mining, sand market, water conservancy and hydropower, highway, railway, chemical industry and building materials industries, such as: basalt, granite, cobble, limestone, concrete, etc.

Granite crusher could deal with materials which length is within 100-500 millimeters. Its maximum compressive strength could reach 350 mpa. And it has many advantages such as bigger crushing ratio, the broken materials could turn into cube particle etc.

Granite Crusher Working principles

Granite crusher is a kind of crushing equipment which could break materials by impact. When the material is going into the function area of plate hammer, the broken materials will be constantly thrown back onto the counterattack device installed above the rotor with the high-speed impact of plate hammer.

Then they will be striked back by scaleboard to the function area of plate hammer and will be striked back again. After that, the materials could be processed again in crushing cavity. The materials will be discharged from the bottom of the machine until the materials are crushed into certain particl size.

Characteristics of function

Granite crusher has a simple structure without key links and a unique counterattack lining board. Hard rock broken function is very efficient and its energy consumption is lower. Its products are in the shape of cube, the size of discharging is adjustable, and has a simplified crushing process which economize the production cost.

Structure characteristics of Granite crusher

1. The machine has a bigger feeding port, higher crushing cavity, and suit with harder materials. The product has better lumpiness and less mountain flour.
2. The clearance between counterattack plate and plate hammer coulf be adjusted conveniently to control the particle size, the particle shape is better;
3. The machine has a compact structure, strong rigidity. The rotor inertia is larger.
4. High chrome plate hammer has a higher impact resistance, abrasion resistance and the force of impact is huge;
5. The machine has no key links which enables its maintenance more conveniently, economical and reliable;
6. The machine has complete crushing function, higher productivity, smaller machine abrasion rate, higher comprehensive benefits.

Grading (screening) introduction

Filed under: Uncategorized — sbmzhcn @ 10:35 am

For economic reasons alone, the growing demand for basic raw materials such as ores, coal, salts and the like calls for extraction methods where an undesirably large percentage of deads is obtained as well. These contaminants require preparation of the extracted crude products, e.g. in preparation for smelting, as a substitute for household coal and power plants or as basic material for processing in various industry sectors.

Coal, for instance, must be graded according to grain sizes and rid from rocks (refuse) in separating plants. Ores must first be finely ground and then graded; salts musts be ground and graded. in some cases screen grading is sufficient for upgrading a given material.

Grading means separating solid matter according to grain size. In screen grading, the material is separated mechanically on screen plates. Extremely fine grains of less than 1 mm are primarily separated by means of air separation. In this process, an air current supersedes, in a way, the screen plates. in hydrograding (sizing in a flow of water) the different grain sizes are separaten in a flow of water.

Both in hydrograding and in air separation, variations in density and grain shape reduce the accuracy of separation. Over the past three decades, there has been enormous technical progress in the separation of materials according to grain size. The sizes of the machines used for grading, classifying and centrifuging were rapidly increased into ranges which were not considered safely feasible before.

Until far into the sixties, the maximum permissible width of these vibrating screens, which dictates their performance, was about 2.50 m. However, economic considerations led to the development of bigger, safer and easier-to-maintain vibrating machines with the objective to process both dry and moist materials, achieving the highest possible specific throughputs and the best possible accuracy of separation. Today, operationally reliable vibrating screens are up to 5.50 m wide and feature an active screen surface of approx. 40 to 45 m2 on a single tier.

The vibrating screens needed for the various grading jobs are among the most severe bearing mountings encountered in the processing technology sector. Due to the permanent alternating stress to which all machine components are exposed, and the dangerousness of their auto vibration, there was only a gradual development toward larger machines.

Rolling bearings in vibrating screens are stressed by high, mostly shock-type, loads. To compound matters, the bearings, while rotating about their own axis, perform a circular, elliptical or linear motion. This results in high radial accelerations which additionally stress the bearing, and especially the cage.

The operating speeds are usually very high so that the bearing temperatures in vibrating screen applications are 20 to 30 K higher than in normal applications.

Moreover, in screening machines, major bearing misalignments and pronounced shaft deflections must almost always be reckoned with.

May 20, 2012

Glass crusher machine

Filed under: Uncategorized — sbmzhcn @ 10:29 am

Glass crusher machine info

Glass crusher machine: also known as composite glass crusher, is mainly used broken glass, stones and so on. This series crusher (Glass Breakers) is the composite crushing machine in our company based on the domestic and international crushing technology to optimize the design from the new product, its performance has reached domestic advanced level, for crushing all kinds of hard materials, can be widely used in mining, metallurgy, refractory, cement, coal, glass, ceramics, and electric power industries.

Introduction of composite glass crusher

Introduction of composite glass crusher: crushing ratio; high yield, compared with 1.4 times higher than similar domestic products; efficiency, energy saving; wearing parts of high hardness, high toughness, wear-resistant material for Multi, life expectancy increased by 2-3 times hammer and the gap between the back plate is adjustable to meet a variety of Liaodu conditions. Glass crusher crusher is similar technology at home and abroad, have broken with the hammer impact on the advantages of breaking. The main technical parameters of the optimal design for the development of a new crushing, coarse grinding products, with crushing ratio, energy consumption smooth, simple structure, easy operation and maintenance and so on. Is a true multi-purpose, high efficiency and low cost of new crushing equipments.

Working principle of broken glass

Glass crusher machine

Glass crusher machine

Large piece of glass from the machine into the upper part of the vertical high-speed rotation of the impeller at high speed under the effect of centrifugal force, and the other part of the umbrella in the form of materials diverted around the impeller produces high-speed impact and crushing, the material after impact each other, will in between the impeller and the casing to form a vortex several times each material impact, friction and grinding, through discharge from the bottom to form a closed loop several times, controlled by the screening equipment to the required product size.

The working characteristics of the glass crusher

(1) simple structure and reasonable operating costs low. Stone by stone at the principle of wear.
(2) crushing rate, energy saving.
(3) has the crushing, coarse grinding function.
(4) The moisture content of materials subject to little effect, moisture content of up to 8%.
(5) shifts the noise below 75 decibels (db level), dust pollution.
(6) suitable for crushing of hard, special hard material.
(7) products into cubes, packing density, iron contamination is minimal.
(8) from the lining of the impeller wear and easy maintenance.

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