Патент USA US2115771код для вставки
May 3, 1938. v 2,115,771 ‘ H. D. HELLMERS PROCESS FOR PRODUCING GRANULAR BORAX Filed Jan. 29, 1954 Magi; Patented Maya; 1938 ' " “2,115,771. - UNITED STATES . PATENT 1 OFFICE mam raocass roa rnooocmo Gamma nonex Application HenryJanuary D. Hellmers, 29, 1984, Westend, Serial No. 708,882 <1 Claim. (CI. 83-94) The preferred form of carrying out my inven tion is illustrated in the accompanying drawing The present invention relates to an improve-l ment in a process for producing granular borax which illustrates the method of discharging the and the product obtained thereby, and its prin . anhydrous borax from the furnace in the form . cipal object is to facilitate the commercial 5 handling of borax and to render the same more economical. ~ of a thread, of cooling the thread and of immedi ately breaking the same into short lengths. When referring to the thread I wish to have it under stood that I do not necessarily mean a thread of round cross-section, but that I also wish to cover, . Borax at the present time is commercially handled either in the crystalline form of the decahydrate NBaBiO'LlOHzO, or as anhydrous a thread inthe form of a ribbonor even a thin 10 l0 borax NazBaOr. when borax is placed on the narrow sheet, the principal object of the inven? tion being to cause the molten dehydrated borax to solidify and to be broken up into thin pieces market in the form of the decahydrate it carries .a large amount of water, which unnecessarily increases the weight of 'the borax and makes the shipping and other commercial handling of 15 the borax very expensive and the large water con ‘ which lend themselves to pulverizing ' or com minuting action much more readily'than a solid 15 block. _ \ tent is objectionable in use of the borax for many purposes. It is preferred, therefore, to reduce the decahydrate to the anhydrous borax or to substantially anhydrous borax, before placing the 20 same on the market, and this has been usually . done by melting the decahydrate in a furnace for driving oil? the water and by pouring the molten material into molds where ‘it is cooled so as to form a very hard mass that is subsequently 25 crushed or pulverized in any suitable pulverizing equipment. . v . ‘ While I have shown only the preferred form of - Molten anhydrous borax poured and cooled to produce a solid mass of this character is very di?icult to reduce and it takes an excessive amount 30 .of power for breaking up such borax into a com minuted‘ condition. In breaking up the borax there is also always the danger of contaminating the borax during the crushing operation by par ticles of metal or whatever substance the crush 35 mg device happens to be made of. It is, for in stance, very serious to contaminate the borax with even a small amount of iron, and if such con carrying out my invention, I wish to have it ' understood that various changes or modifications may be made within the scope of the claim here to attached without departing from the spirit of‘ the invention. - _ In‘ carrying out my invention I v?rst melt the decahydrate ‘of borax in the furnace I, and I continue this heating until anhydrous borax in the molten state remains. Then I discharge the anhydrous molten mass through the spout 2 in the form of a comparatively thin thread or ribbon of molten nhydrous borax indicated at 3. This thread is scharged upon a water-cooled drum 4 which is revolved by any suitable means .and reciprocated axially as by the eccentric 5 so that the descending thread continuously contacts a new portion of the drum whereby it is cooled more I ' eiliciently. The rate of the rotaryspeed of the 35 drum and the rate of reciprocation are prefer ably proportioned so that the thread if allowed ' to remain on the drum would form a‘ spiral there‘ tamination, takes place, the product must be von. However, after a few turns of the drum the‘ ‘ puri?ed again after the pulverizing operation is thread has become cooled su?iciently to be brittle’ 40 40 ?nished in order to make the anhydrous borax and mostly breaks up into chunks, and any of _ marketable for a good many uses. the resolidified material that’ remains attached I have discovered a much more economical to the drum is removed from the drum- by a way of treating borax whereby the difiiculties scraper or any other suitable instrumentality. outlined are avoided. In my process I do not 45 discharge the molten anhydrous borax from the furnace and cast it in the form of a solid block, but instead I discharge the anhydrous borax in the form of a comparatively ?ne thread or thin ribbon, and cause the thread or ribbon to be 50 _ cooled and broken up into short pieces immedi ately upon cooling. The borax in cooling breaks itself up into pieces from one to live inches in size. If the anhydrous borax is presented in such a manner it is brittle and can be pulverized very 55 easily in standard reducing machinery. The‘ borax when cool will break of its own accord into pieces and the scraper will clean the drum should any of the borax adhere thereto. I prefer ably arrange the drum 4 somewhat longer ‘than’ the length of its stroke so as to present an ac tive central area 6 which receives the thread from the spout 2 and two inactive end portions 1 and 8. I also preferably provide two scrapers 9- and I0, spaced by a few turns from the transverse plane of the spout on opposite sides of the plane. The ‘ drawing shows the drum in one of its end posi- 66 2 , 2,115,771 ‘tions and the spout’ as discharging on one end The advantages of treating borax'in this man of the active area. As'the drum moves to the ner‘are apparent from the foregoing description. right and makes a few turns,‘ the ?rst turn of the 1' It takes less power to break up‘v the pieces of thread, which at that time has cooled suf?ciently thread or thin ribbon than it would to break up to be brittle. .reaches the right scraper In which a solid mass; the contamination of the borax by removes the first turn and continues to remove v additional turns of the spiral as the drum ad-' the metal of the comminuting apparatus is pre vances. When the drum reaches the end of vented since less power is required for crush its right hand travel, there will be a few turns ing the borax, less dust is formed during the 10 left on the drum and the left hand scraper will pulverizing action, and the borax is broken up into particles of more even granular size than be in contact with the left inactive end of the ' could be obtained by the breaking up of solid 10 drum. The drum now reverses its direction and blocks of borax. . ‘ moves to the left which causes the thread to I claim: double up on itself through a short distance until Process of producing anhydrous borax com the remaining turns have been covered, where upon the spiral will be continued in a single prising melting and dehydrating borax decahy 15 layer. After the-drum has moved to the left by drate by heat to produce molten anhydrous borax the width of a féw turns, the ?rst turns of the left glass; discharging the molten borax glass so pro hand end of the spiral will reach the left hand duced, in the form of a thin threadlike stream upon the surface of a rotating cooling drum, scraper 9 and the scraping action will now pro ceed from left to right. It will be noted that thereby solidifying and breaking up the glass into 20 the thread will be broken away from the drum relatively short lengths which can be ground without the production of excessive ?nes or con in comparatively short pieces which ,may be col lected and which may be easily pulverized there— tamination by metallic impurities from the grind after in a suitable pulverizer. As above stated ing apparatus; and so grinding suchshortlengths. the breaking of the borax into small pieces is due to thecooling of the’borax. HENRY D.‘ HELLMERS.