I. Process Introduction
Main raw material used in this process is borax, zinc salt and zinc oxide. First put the raw materials in conformity with process requirements into reaction system according to particular sequence, and react under certain conditions. Then produce finished product of super-fine 3.5 water zinc borate through cooling, filtration, washing, drying, pulverizing and packaging. It is also feasible to take zinc salt, borax and boric acid as raw material, first perform batching according to stoichiometric calculation, then produce finished product of super-fine 3.5 water zinc borate through reaction, filtration, washing, drying, pulverizing and packaging.
II. Technical Advancement
This technology can effectively control particle diameter within 100 nanometers, and increase the compatibility with inorganic filler and organic high polymer through surface modification, and improve dispersion property in resin.
III. Market Prospect
It is often used together with other fire retardant to exert flame-retardant synergy effect and smoke-restraining function, which can be widely applied in unsaturated resin, epoxy resin, PBT, PET, PA, EVA, EEA, PE, EPDM and acrylic ester, having flame-retardant, synergy, smoke-restraining, dripping-resistant, non-toxic, cheap features. Like magnesium hydroxide, it is promotion-type excellent inorganic fire retardant, having broad market prospect.
IV. Technical Sources
Autonomous research and development, and industrialization technology.
V. Product Quality
Product quality is in conformity with the following standard:
|
No. |
Item |
Indicator/% |
|
1 |
Zinc oxide |
37.5±1.5 |
|
2 |
Diboron trioxide |
48±1.5 |
|
3 |
Free water |
0.3 |
|
4 |
Weight of screen residue (8000 meshes) |
0.5 |
VI. Investment Scale
According to 1000t/a, equipment investment is 1.5 million Yuan.
VII. Environmental Protection
Zinc borate mother liquid contains boric acid and sodium sulfate, through particular procedure disposal; recycle mother liquid after collecting sodium sulfate. The production process does not generate “three wastes”, causing no environmental pollution.
VIII. Economic Benefits
Comprehensive production cost is 8200 Yuan/t (calculated according to raw material and product prices in 2009); factory price varies within 12,000-16,000 Yuan/t according to different varieties and grades. The economic benefits are significant.
IX. Form of Cooperation
Technical transfer. Taking responsibility for process flow design, supporting equipment of standard equipment, non-standard equipment manufacture design, equipment is plane layout design, equipment installation design, pipe network design, equipment installation guidance, equipment commissioning, production commissioning, training for production engineers, analysis staff and technicians, process operation specifications, raw material and product analysis method, and preparation of intermediate control analysis method; ensuring output, yield and quality to reach the standard; and undertaking turn-key projects.