| 摘要 |
<p>PURPOSE:A novel pocket heater with a quick rise in temp. during heat generation and evolving little gas during reservation, which is prepd. by compounding a heat-generating composition consisting of an iron powder, a carbonaceous material and a neutral metal salt with an iron sulfide powder. CONSTITUTION:The titled pocket heater is prepd. by pref. mixing 100pts.wt. mixt. consisting of an iron powder, particularly pref. a reduced iron powder and an iron sulfide powder, pref. a pyrite powder, with 20-70pts.wt. water, 0.1- 80pts.wt. carbonaceous material, pref. an active carbon powder, which may be replaced by a coconut shell char powder, 1-20pts.wt. neutral metal salt, pref. NaCl and 1-500pts.wt. water retaining agent such as wood waste or vermiculite. If necessary, 0.1-4pts.wt. inhibitor for gas evolution, such as NaOH, may be added to 100pts.wt. iron sulfide powder. It is pref. to compound the iron sulfide powder in an amt. of not more than 150pts.wt., particularly 2-70pts.wt. per 100pts.wt. iron powder.</p> |
