On October 8, 2018, under the auspices of China casting association, the scientific and technological achievements evaluation of new carbon-free clay wet sand casting technology jointly completed by donghua university, shandong shading and new material technology co., ltd. and yiwu yunxi new material technology co., LTD., will be held in weifang city, shandong province and successfully concluded., chairman of the Chinese academy of engineering, the Chinese mechanical engineering society lipeigeng, a professor at the Chinese academy of engineering, the national casting society of ting wen-chiang professor, vice President of China machinery industry federation, China foundry association, li bo researcher, ZhaiBin the executive vice President of China academy of environmental protection industry, China's ecological environment and sustainable development of the central committee member, weichai power (weifang) et al casting co., LTD., chairman of Ren Xing wu, weifang dostict long-jiang zhang district guests and experts such as more than 40 people attended the meeting.

Evaluation committee composed of lipeigeng academicians, ting wen-chiang academician, li bo, chairman of 11 domestic well-known casting experts, in the evaluation committee member of ting wen-chiang under the auspices of coatings for green sand mold are agreed to by new carbon-free technology evaluation and that the project of scientific and technological achievements reached the international leading level, the proposal as soon as possible to develop new carbon-free coatings for green sand mold technology standards, to further increase the scale of popularization and application.

The experts attended the meeting carefully listened to the work report, technical report and other reports of professor zhu shigen, the inventor of new carbon-free clay wet sand technology, reviewed the evaluation data of technical achievements such as application certificate provided by the project unit, inspected the production site, and after questioning and discussion, formed the following evaluation opinions:

1. The evaluation data provided are complete, detailed and consistent with the evaluation requirements.

2. The project has developed a new type of carbon-free clay wet sand casting technology, which has solved the long-term serious pollution problem in the wet sand casting production of traditional coal powder sand, and is a new breakthrough in the development of wet sand casting technology.

3. Key innovation points and breakthrough technologies:

1. The new carbon - free clay wet sand has been studied and developed systematically for the first time at home and abroad.The project products have excellent conventional casting performance and unique advantages such as low gas generation, high thermal strength and good reusability.

2. It takes the lead in the world to set up the automatic production line of new carbon-free clay wet sand with annual output of 600,000 tons and has been put into operation successfully.

3. The new technology has the following significant advantages :(1) the molding sand does not contain coal and other carbonaceous materials and organic materials.Energy conservation, basic elimination of harmful gas pollution, great reduction of dust pollution and solid waste discharge;(2) improve casting surface quality, internal quality, size accuracy and high yield;(3) good reusability, low sand consumption and low cost;(4) this project is applicable to the production of cast iron parts with manual and machine moulding.

4, above all, the project research and development of "new carbon-free coatings for green sand mold technology" is an original technology achievements, break through the technology of coal powder coatings for green sand mold casting industry worldwide problem, there are serious pollution for a long time, it has very important application value, which has great significance to the development of foundry industry transformation and upgrading of green provide strong technical support.