By far his most economically important invention ( Patents 5442 / 1885, 10530 / 1887 and 15065 / 1887 ) was the rotary cement kiln.
32.
And the other 16 percent comes from about 100 factories and industrial sites, including landfills, incinerators, foundries, cement kilns, coke ovens and hazardous waste furnaces.
33.
Recycled motor oil can be combusted as fuel, usually in plant boilers, space heaters, or industrial heating applications such as blast furnaces and cement kilns.
34.
White said he supports stricter emissions standards for power plants and cement kilns but said that the construction ban could put small contractors out of business.
35.
The fuel pellets can be used as secondary energy source in industrial furnaces, such as lime kilns and cement kilns, coal-fired power stations and blast furnaces.
36.
The Navy would like the napalm shipped to cement kilns, but thus far neither of the two cement companies in Texas has expressed an interest in it.
37.
The production of cement kilns, together with the incineration, is to date one of the two main ways to treat this solid effluent of the food industry.
38.
Bottom ash may be used as raw alternative material, replacing earth or sand or aggregates, for example in road construction and in cement kilns ( clinker production ).
39.
In the U . S ., cement kilns are regulated as a major source of air pollution by the EPA and must meet stringent air pollution control requirements.
40.
A North Texas cement kiln is expected to be fined $ 223, 000 on Wednesday by state environmental officials for air pollution violations, some of which date to 1990.
