R&D at Hindustan Newsprint Limited:
The in-house R&D at Hindustan Newsprint Limited is recognized by Department of Scientific and Industrial Research (DSIR), Ministry of Science & Technology, New Delhi in the year 1992. The R&D section is well equipped with sophisticated lab equipments. This has got the facilities to carryout R&D activities in the areas of
- Pulping
- Bleaching
- Deinking
- Paper making
- Chemical recovery
- Water treatment
- Pollution control and
- Relevant fields related to the above
R & D activities:
The R & D activities are carried out to:
- Improve the product quality and productivity of the mill with the available resources.
- Find out alternate raw materials to meet the shortage of conventional raw materials.
- Use of more secondary fibres to conserve forest based raw materials.
- Improvement processes, technologies & techniques.
- Exploring the possibility of wastes into value added products.
- Making newsprint manufacturing technology more environment friendly.
Product/process development jobs so far completed:
- Change from three stage refining to two stage in chemimechanical pulp mill to save energy without compromising pulp quality.
- Use of retention aid in Paper machine helps reduction in fluff and improvement in print quality in printing press.
- Alkyl Ketene Dimer (AKD) is being used in process to reduce water absorbency of newsprint slightly to facilitate four colour printing on both sides.
- Fatty acid soap, which is a common chemical for waste paper deinking has been successfully replaced by cost effective surfactants.
- Development of pilot plant for making Calcium chloride from lime sludge has been initiated by R&D .The pilot plant operation in making calcium chloride from lime sludge has been demonstrated successfully and this has been proved to be a viable option.
- Studies revealed that the Effective Residual Ink concentration (ERIC) in final Deinked pulp (DIP) made from 100% Old Newspaper (ONP) is high and brightness is low in comparison to DIP made from ONP mixed with Old Magazine (OMG). It is inferred that a minimum of 10% OMG mixed with ONP helps to reduce the ERIC and improve the pulp brightness.
- Based on R& D studies to reduce furnace oil consumption in Lime Reburning Plant, woodfines are being added along with furnace oil. The cost of production of Product Lime reduced by Rs 430/MT because of reduction in furnace oil consumption.
- From the existing pulp availability and achieving of the possible high brightness pulp in their respective pulp plant, writing and printing paper of Cream wove grade (75% ISO Brightness) is manufactured in paper machine with the pulp furnish of 22% Imported Hardwood sulphite pulp, 55% Own chemical pulp and 23% high brightness own deinked pulp.
- It is found that The mechanical and optical stability of writing and printing paper is unaffected by adding 10-15% high brightness CMP pulp . This furnish is being implemented successfully.
Product / Process development jobs in hand:
- Study on coal (imported+indigenous) and other solid fuels blend to optimize their thermal value.
- Deinking effect on ageing of old newsprint.