Nonferrous Metal Factory 2 - Thai Nguyen one-member Nonferrous Metal Co. Ltd

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20/02/2012

Thai Nguyen Nonferrous Metal Factory 2 is one of 11 member factories of The one-member Thai Nguyen Nonferrous metal Co. Ltd. The factory specializes in producing Zinc oxide powder 60% (4.600 Tons/year). It can be said that before applying CP, the Factory met difficulties due to no storage site for raw materials, ores and limestone and coal. Those materials were mostly store outside, suffered high and changing humidity due to weather.

Narrow workshop for material preparing, low efficiency, high production cost also were factors hindering the quality of material preparation step (composition, grade and humidity). Since the furnace technological criteria were unable to met, its efficiency was low.

Towards a sustainable development and environmental protection culture, the Factory has actively implemented practical solutions such as improving working conditions; changing product recovery technology; building coverage for fuel management site, etc. But most noteworthy is that since participating in CP demonstration project of the Cleaner Prodution in Industry Component (CPI), the Company has achieved higher environmental protection performance as well as economic benefits

With the support of CPI and experts of Vietnam Cleaner Production Centre, the Factory’s CP team has proposed two solutions of improving the rotary kiln no.1 and no.2 at place.

Applying CP since March 2007, some results from the demonstration are as follows:

Technical benefit	Economic benefit	Environmental benefit
Phase 1
Reduction of 19% of specific limestone consumption	Annual saving of VND 267 millions	Reduction of temperature in working place (from 10 -15oC) Reduction of dust, temperature and risk of accident Improvement of resource and energy efficiency
Reduction of 2% of specific coal consumption	Annual saving of VND 468 millions
Reduction of 0.8% of specific electricity consumption	Annual saving of VND 7 millions
Phase 2
Reduction of 71.8 - 98.2% of specific limestone consumption	Annual saving of VND 819 - 1,200 millions	Reduction of CO2 emissions to the environment
Reduction of 4% of specific coal consumption (2010)	Annual saving of VND 937 millions (2010)
Reduction of 1.4 - 3.5% of specific electricity consumption	Annual saving of VND 13 - 23 millions

Typical Cleaner Production options of the Company are as follows:

No.	CP Option	Investment	Performance	CP technique
	Phase 1
1.1	Prolong the kiln: 14 m to 21 m	VND 3.02 billions	Saving of VND 743 millions	M
1.2	Mechanize material input into the kiln			EM
1.3	Build more roofed-storehouse			EM
1.4	Change the existed motors to motors with inverters			EM
	Phase 2
2.1	Change the manual dust collecting system to mechanized one	VND 5.9 billions (CPI supported 40%)	Saving of VND 2.3 billions in 3 years (2008, 2009, 2010)	EM
2.2	Prolong the kiln: from 28 m to 34 m			EM
2.3	Mechanize material input into the kiln			EM
2.4	Change the existed motors to motors with inverters			EM

Remarks: EM: Equipment Modification

With the results achieved in the Factory, Cleaner Production will be replicated in Thai Nguyen one-member Nonferrous Metal Co. Ltd./.

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