return icon Vietnamnet.vn

More transparency needed in VN ash and slag market

Thanh Dai Phu My JSC in Hai Phong City began treating slag from steel mills in August 2015 when the treatment plant in Ba Ria – Vung Tau became operational. 

More than 85 percent of its after-treatment products are cement additives which are provided to tens of cement plants throughout the country.

 

{keywords}




More than 12 percent of the products are used as building materials to replace natural stone, provided to projects in industrial zones.

Following initial success, Thanh Dai Phu My built another plant to recycle by-products in metallurgy in Nam Cau Kien Industrial Zone in Hai Phong City.

The biggest advantage of the treatment plant is that steel slag can be fully re-used. The by-products from steel mills can be processed into materials to replace natural materials to make useful products, friendly to the environment. The output products are provided to industrial zones and neighboring areas and to reduce natural mineral exploitation.

More than 85 percent of its after-treatment products are cement additives which are provided to tens of cement plants throughout the country.

Thanh Dai Phu My uses modern technology to create products which can be used as input materials for other industries, such as metallurgy, cement and building materials, so no secondary waste is generated. The water used during the production process circulates through sedimentation tank systems and is brought back, so no waste water is produced.


“With the technology, we are sure that the plant won’t cause negative impact on the environment during the industrial waste treatment process. The recycling and full reuse of steel slag will bring benefits to three parties (owners of waste, treatment company and users),” he said.

Experts, after considering the national power development plan by 2020, estimate that the total amount of ash and slag from coal-fired power plants may reach 29 million tons by 2025.

The ash and slag could be input materials for mining additives for cement or unburned bricks, or used to partially replace clinker and clay.

The ash and slag market in Vietnam has taken shape with many companies collecting ash and slag in large quantities for reuse in cement and unburned brick production.

The coal-fired power plants belonging to the Electricity of Vietnam have signed contracts on selling ash and slag to Son La and Trung Son hydropower plants, which use ash and slag to make dams.

However, Dai said there is unhealthy competition in the market. Many enterprises don’t have ash and slag treatment technology, but have joined the ash and slag treatment market. They just want to use the metal contained in slag, and bury untreated slag, which causes pollution.

Thanh Lich 

 

Reducing investment in coal-fired power plants recommended to save Vietnam's environment

Reducing investment in coal-fired power plants recommended to save Vietnam's environment

LNG could replace coal in the power sector at a higher cost but would cause less pollution.  

MORE NEWS

Market cap of 10 State-owned firms expected at US$5 billion each by 2025

The Government has set a target that at least 25 State-owned enterprises will have a market capitalization of over US$1 billion each by 2025, including a minimum of ten firms with a market cap of over US$5 billion each.

VIETNAM NEWS HEADLINES MAY 16

European Film Festival in Vietnam to take place in four localities

31ST SEA GAMES: UPDATES MAY 16

Five golds for Vietnam in SEA Games 31’s athletics

Microplastic pollution found in Da Nang air

Microplastic pollution in the air in both inner and suburban areas of the central city of Da Nang has become serious. Microplastics can go directly into the lungs during daily activities.

State Securities Commission prioritises stabilising solutions for stock market

The State Securities Commission (SSC) is closely monitoring the developments of the economic - political situation, assessing the influence on Viet...

Local aviation market sees strong recovery

The aviation market in Vietnam is vibrant and recovering with the number of international visitors increasing five-fold, according to experts.

Vietnamese PM receives leaders of US companies in New York

Prime Minister Pham Minh Chinh received executives of Warburg Pincus and Glenfarne Group in New York on May 15, part of his working visit to the US and the UN.

Digital transformation: action and breakthrough results

During the time supply chains were disrupted because of the Covid-19 pandemic, Vietnam's wood and furniture industry still maintained its market share and even surpassed rivals to become the largest wood exporter to the US.

Keeping CPI below 4 pct this year a challenge for VN: Economist

It will be a challenge to keep Consumer Price Index (CPI) growth under 4 percent this year, according to an economist.

Vietnam currently tops SEA Games 31 medal tally

Vietnam is standing atop the SEA Games 31 medal tally with 68 golds, leaving second-placed Thailand far behind.

Five bodybuilding gold medals for Vietnam at SEA Games 31

Vietnam reaped a total of five gold medals among the 10 bodybuilding categories at the ongoing 31st Southeast Asian Games (SEA Games 31) after competitions of this sport wrapped up on May 15.

Hanoi should learn lessons from the past in urban planning

Hanoi has announced the master plan for the Red River urban area, with a scale of 1/5000.

Mechanical engineering companies fail to conquer US$300 billion home market

The Vietnamese mechanical engineering product market is estimated to have huge value of $300 billion, but local companies have only a small market share.

Tightening control over ETC service providers

The Ministry of Transport has failed to ensure the progress of the application of the nonstop electronic toll collection (ETC) service as required by the Government and is hurriedly boosting attaching ETC tags on vehicles.

New policies needed to control land conflicts

In order to reduce land conflicts, it is necessary to amend legal provisions and the way of implementing policies.
back_to_top