Document k9GVBq9Rm7qvq8gv9BkMwxJ0D

Cie^eA&nd F. W. Porter October 1, 1.3 S3 Booklet Information The following are We nsnufacburinf_ procedures for needed sine, xinc sulfide, and sine sulfate, which you have revested. hs^ad 51fl Oslo leaded zinc pigments ere manufactured from toe highest grade lead and zinc ores available. / As these ores come from the sines, they first undergo s crushing operation. They are teen concentrated eitner by oil flotation, in jigs, on shaking tables or by electrostatic separation. The clean concentrates, upon arrival at tne plant, are sampled for chemical analysis and segregated in storage bine according to their sine-or lead content. Tne zinc sulfide ores from trie district, called zinc blends, assay about 6036 of zinc and 1^- of ie&d, while the lead sulfide ores, knows as galena, 'as say, on an average, 60S of lead and 136 of zinc. Tne remaining portion of i-.ese ores consists mainly of the sulfur witn waich the metals are combined. The next step ie one of roasting tne zinc ores, a sort of re fining process, raving, as its. purpose, the removal of the sulfur con tent. This sulfur is driven off at s red n- at in huge, automatically operated roasters leaving tne zinc in the form of the oxide. The lead sulfide (galena) ores are not given this roasting. We sulfur content of these ie ultimately oxidized to the basic sulfate in We furne.ee operations described below. It is in this furnace pro cessing in at the finished pigment is made. In preparing the furnace charge or mix We proper beiending of Use Wad ores with the roasted zinc ores and these in turn with the otner ingredients of tne cr.arge, such as chatts, coal, and flux, is of very great importance. Dpon it depends the ratio of zinc oxide to basic lead sulfate in tne finished pigment, likewise We color and otner im portant qualities of the final product are largely determined at this point. From We mixers the charge ie fed to the furnaces and ignited. The intense neat from We burning of the coal causes various chemical reactions to take place and se a resuit lead and zinc vapors are formed which rise from We Charge to enter vnat is tnovn ns the combustion ensaber. here tne vapors, burned by the admittance of &ir, for roll ing rnite clouds of tne very finely divided basic lead sulfate and zinc oxide particles ?n.ich togew&r constitute Oslo Leaded Zinc. Tne lead and zinc components fumed togeWer, as Wey are, become bonded in a form highly desirable, especiaW.y from a standpoint of dura bility. N15893 As the pigment lessee from tue e--v_\eu; ti-on cipher it it con ducted, in 6 steady streets of floating particle?, through Ion4 cooling lines to tne' collecting Eyeten, nsre it i;- c-r jsec fc er-ier cotton c&rt standing upright over -.op.-srs, pl.meot . -articles t\rs retrained on toe inner rail.- of tiio bags v-.ii- the turn-ce ga**? pe&g out t.;.ru tne senes c: the cloth. At reguis/r intervi.;.: tr.v t-ags ?.rr: sunken, causing t.ne ; to t.c the hoppers beio* froa viler, .11 is dram axt<- fi..!<* into cage for .-..hipping. The foiiOTin,. tab-ie -iets t,..uses *n: cnarocterirtice of Owl .wefcded Inc Figt&ente. Oii Absorption G&.rdn s r--Co1 em sn Ratio Average Method (Zinc Oxide to Specific Residue (gsu. Oil per 100 jk*4e. Sa6&,ireafl.Suii>tal Gravity, on_35 Ge&n Ksg.. Pigment) 412 15?6 65/35 60/40 5.9* 5.34 C.05f 0.0252 17.0 - 10.0 16.0 - 16.0 User 41)' Paints Paints Zinc Sulfide When the water solution of e sine es.it ie mixed ^ith the water eolution of a sulfide a cneaicai reaction takes place wfaicc. resuite in tne precipitation of line sulfide as a very finely divided white solid. It ie by tnis precipitation process, from hignly purified solutions, that sine sulfide is given lit first form in this plant. The "crude" tine sulfide thus produced, is then carefully washed free of tne reaction liquor. This la followed by drying preparatory to calcination. The purpose of tne calcining operation is one of altering the physical characteristics in such a way as to beet develop whHenese of color, high opacity, proper oil absorption and desirable texture. This ie accomplished by careful nesting under highly controlled atmet-faerie conditions followed by water quenching. Lumps of pigment formed by these operation: are completely broken up by wet ai-iing leaving the sine sulfide particles very finely divided in water suspension. The next step ie tr.s removal of tne bulk of toe sater by filtra tion. Folioring tills, tr.<s pigment ie carefully dried at low temperatures, thorougiiiy disintegrated and packed into bags ready for shipment. 007-SWP-53103 Bgiow hre given characteristics and uses of our Zinc Sulfide Grade "A* 4.00 on 515 Mesh Max. - 0. Sjt Oil Absorption Gardrer-Coiesan Method (gsi Oil per 10G ?s.0 - -30.0 g&t* Pigment in - Paints, Oil Cloths, Linoleum, Leather, In the manufacture of white and opaque glee*. z.4as..&i&tg Zinc Sulfate, h Ibo '<no?m as white vitriol, is manufactured at Coffeyvixle from the same, prims quality, sine sulfide ores s$ are used in asking Oslo Leaded Zinc Pigments. As the stinc, in this instance, is extracted by s leaching process it is highly desirable that ins or be reduced to as email particle size, as is practical, in -reaping si ft. otJvrr cond* tions. This is aecosplished by & grinding and screening operation* The ground ore is than roe sled In much the same meaner and tc the ease end as is the zinc ore which is taken for in the manufacture of leaded sine pigment, 'This roasted ore is subsequently filled into suitably designed lesc-ing tanks where it Is treated *itfc dilute sulfuric acid. The acid reacts eiieatelly ?:lth the zinc oxide in the roasted ore rssulting in the maxing of a dilute zinc suifste solution. Since just enough sulfuric acid is used with a batch of ore to react with the line oxide present, the leaching process ends at a point w*ere both acid and oxide are entirely used up. The zinc sulfate solution is clarified by sett-ling and filtering. It is turn puaped through & purifying system - here any traces of soluble imparities are earefaxly removed. The purified liquor is tuen run into evaporating t&nics where the excess water is driven off by heating. The resulting, concentrated eolation is either run off into crystallising tans where that grade of solid zinc sulfate, containing five aoiee of water and 25%% of zinc, is ob tained by crystallization, or it is subjected to high tempera lures in a dehy dratioa process to produce the one mole salt stioh contains 3$ of zinc. Finally, both grades are ground, screened and packed into bags or barrel if, ready for the trade. In tae table, teicn follows, the uses and charscteris-ti.ee af t s?e t?o grades of zinc sulfate are given. 007-SWP-53104 -4- Zinc Metal Content Fineness One Jsoie Five Mole 56i Z5%% Thru 7 j'esn Tnru ? Meen Pees of line Sulfate Manufacture of iithopon Mordant in printing and dyeing. Agent in resov&l of sulfur eosjounde iron gasoline. Freterralive end clarifying agent for glue solutions. In tde cneaical industry ae a precipitant of contaminating rulfidec in certain processes. Preservative of wood snd skirts. Agent in ine treating of soils. Die infectant. Differential flotation of sinerale. Rayon manufacture. lours very truly. CEPiM 007-SWP-53105