Plant & Equipment

?Effective tools to do good work?

Established in November 2003, Sinoma Cement was among the first group of AAA grade credit enterprises in China’s building materials industry. Additionally it is one of 12 large cement groups that are directly supported by the government.

In 2007 the company created Sinoma (Anhui) Cement as a wholly owned subsidiary. With registered capital of 600 million yuan ($AUD123 million) and total assets of two billion yuan ($AUD410 million), the enterprise possesses extensive operations of over 660,000m2. It now employs more than 600 people, and is considered the largest producer of cement clinker in the central Anhui region of China. Its main products include cement, cement auxiliary materials, limestone powder, concrete products and cement products. The company has also enlarged its businesses into other fields, such as commercial concrete, admixture and aggregate.

The extensive production of clinker cement is facilitated through three production lines each, with a daily output of 4500 tonnes, with a total annual production of 5.4 million tonnes. In addition, more than five million tonnes of aggregates, in a variety of sizes, are produced annually. Thanks to the company’s own specialised wharf at Lake Chao, 3.8 million tonnes of a variety of aggregates and other materials are shipped each year to the Yangtze River delta, and then supplied to customers at various locations.

Aggregate production began in February 2012, with the company keen to see production ramped up to five million tonnes annually. This would involve producing a variety of sizes for use in cement manufacturing, and for sale to the construction industry. The plan was to construct three aggregate production lines, with two being fully operational and the third dependent on specific market conditions.

Tall order

When Sinoma (Anhui) Cement set about ramping up its aggregate manufacturing, it established very high standards, both for its own operations and the equipment it wished to use. To achieve these objectives, world-class equipment was not considered to be enough. The designated supplier of aggregate plants would have to, of course, supply the plant and also provide aftermarket support, pro-active servicing and plant design. They would also have to deliver the production required plus low energy consumption, environmental protection, and operator training, and incorporate efficient transportation and stockpiling.

As would be expected from such an important player within the Chinese cement business, Sinoma went about its search for a supplier methodically. Over a year, the company met various manufacturers of aggregate plant, inspected various facilities and met with technical, service, aftermarket and planning experts.

{{image3-a:r-w:200}}IAfter this exhaustive process, the final contract for all elements of the new aggregate plants was awarded to Sandvik Construction. This resulted in an order for Sandvik to supply all the equipment, plan the processes, and support the equipment for two aggregate production lines. These comprised two SV1562 grizzly feeders, two CJ613 jaw crushers, two CI225 impact crushers, two SC3062 circular vibrating screens and two SC3063 circular vibrating screens. With this plant installed and commissioned, Sinoma (Anhui) Cement can now produce five aggregate products consisting of: 31.5-16mm, 16-10mm, 10-5mm, 5-3mm and 3-0mm.

Primary jaw

n addition to providing accurately sized aggregates for the construction industry, Sinoma is using the materials produced by the aggregate plants for its cement manufacturing. As the material for both aggregates and cement is being produced from the same quarry, the blasted rock is quite often of a large size – about one metre in diameter. This requires the use of a primary jaw crusher that can accept a large feed size and reduce the fed rock prior to being fed into a secondary crusher.

The CJ613 jaw crusher has proven the ideal choice. Like most jaw crushers, the CJ613 has a single toggle design, with a deep, symmetrical crushing chamber and easy setting adjustment. It has a large feed opening for its size and an ideal nip angle, giving smooth material flow, high reduction efficiency and high capacity. Despite the simple design, there are many advanced features that ensure easy operation and maintenance, long life and a low cost per tonne. The CJ613 has been purpose-built for tough quarrying applications, with a heavy-duty design and proven technology.

Secondary crushing is provided by the CI225 impact crushers, which have been instrumental in producing the desired shape. The CI225 has been developed for the secondary crushing of non-abrasive rocks in aggregate production, although its attributes have seen it used extensively in the recycling industry, crushing a variety of materials, including reinforced concrete. It is designed on a simple working principle that encourages material to break along its natural cleavage planes, thereby producing precise cubical-shaped products.

Following the crushing process, the material is sent for screening to produce the finished fractions. Two SC3062 and two SC3063 circular vibrating screens undertake this task. The SC screens can be used on a variety of screening applications, but being more robust in their construction, they can accept a coarse feed material size.

After screening and stockpiling, the finished aggregates are distributed across China via highly efficient local waterway transport. The material is sent exactly where it is needed, being used in commercial concrete mixing plants in the major cities around Lake Chao and the lower and middle sections of the Yangtze River.

The phrase “effective tools to do good work” is well known in China. Although Sinoma (Anhui) Cement is very pleased to have selected highly effective tools, and they are certainly doing a good job, that is only half the story.

Through evaluating and investigating the choices available to it, Sinoma now has a reliable, efficient and low cost operation that is supported and maintained by an expert supplier and personnel.

Due to the professional and practical solutions delivered by Sandvik Construction and its equipment, Sandvik will also now be supplying equipment for the Sinoma (Anhui) Cement green mining operation. 

Source: Sandvik Construction


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