A cikin simintin yashi, fiye da 95% suna amfani da yashi silica. Babban amfani da yashi silica shine cewa yana da arha kuma mai sauƙin samu. Duk da haka, rashin amfani da yashi na silica shima a bayyane yake, kamar rashin kwanciyar hankali na thermal, canjin yanayi na farko yana faruwa a kusan 570 ° C, haɓakar yanayin zafi mai yawa, mai sauƙin karyewa, kuma ƙurar da ke haifar da fashewar yana da matukar illa ga lafiyar ɗan adam. . Haka kuma, tare da saurin bunkasuwar tattalin arziki, ana amfani da yashi na siliki sosai a cikin masana'antar gine-gine, masana'antar gilashi, yumbu da sauran masana'antu. Akwai ƙarancin yashi mai inganci da kwanciyar hankali. Neman maye gurbinsa matsala ce ta gaggawa ga duk duniya.
A yau bari mu yi magana game da bambance-bambancen wasu yashi na gama gari a cikin kasuwancin da aka kafa, bisa ga sndfoundry ƙungiyar shekaru da yawa abubuwan gogewa, kuma maraba da ƙarin abokai don shiga magana.
1.Yawan Raw Sands a cikin Foundry
1.1 Yashi na halitta
Yashi na halitta, wanda yake daga yanayi, kamar yashi silica, yashi chromite, yashi zircon, yashi zaitun magnesium da dai sauransu.
1.2 Yashi na wucin gadi
Irin su Yashi silica Artificial, aluminum silicate series artificial spherical sand, da dai sauransu.
A nan mun fi gabatar da aluminum silicate jerin wucin gadi mai siffar zobe yashi.
2. Aluminum silicate jerin wucin gadi mai siffar zobe yashi
Aluminum silicate jerin wucin gadi mai siffar yashi, wanda kuma aka sani da "yashi foda", "Cerabeads", " yumbu beads ", "ceramsite", "Synthetic yashi mai siffar zobe don simintin gyaran kafa (Yashi)", "mullite beads", "high refractoriness spherical". yashi", "Ceramcast", "Super sand", da dai sauransu, babu daidaitattun sunaye a duniya kuma ma'auni sun bambanta. (Muna kiran yashi yumbu a cikin wannan labarin)
Amma akwai abubuwa guda uku don gane su kamar haka:
A. Amfani da aluminum silicate refractory kayan (bauxite, kaolin, kone duwatsu masu daraja, da dai sauransu) a matsayin albarkatun kasa,
B. Yashi barbashi suna da siffar zobe bayan narkewa ko sintering;
C. Mafi yawan sinadaran da suka hada da Al2O3, Si2O, Fe2O3, TiO2 da sauran oxide.
Saboda akwai masana'anta da yawa a cikin kasar Sin na yashi yumbu, akwai launuka daban-daban da saman daga matakai daban-daban da wuri daban-daban na albarkatun ƙasa, da abun ciki na Al2O3 daban-daban da yanayin da ake samarwa.
3. Ma'auni na yashi don tushe
| Sands | NRD/℃ | T.E(20-1000 ℃)/% | B.D./(g/cm3) | E. | TC (W/mk) | pH |
| FCS | ≥1800 | 0.13 | 1.8-2.1 | ≤1.1 | 0.5-0.6 | 7.6 |
| SCS | ≥1780 | 0.15 | 1.4-1.7 | ≤1.1 | 0.56 | 6-8 |
| Zircon | ≥1825 | 0.18 | 2.99 | ≤1.3 | 0.8-0.9 | 7.2 |
| Cchromite | ≥1900 | 0.3-0.4 | 2.88 | ≥1.3 | 0.65 | 7.8 |
| Olive | 1840 | 0.3-0.5 | 1.68 | ≥1.3 | 0.48 | 9.3 |
| Silicca | 1730 | 1.5 | 1.58 | ≥1.5 | 0.49 | 8.2 |
Lura: Masana'anta daban-daban da yashi na wuri, bayanan za su sami ɗan bambanci.
Anan shine kawai bayanan gama gari.
3.1 Halayen sanyi
Dangane da dabarar ƙarfin sanyi, ƙarfin sanyin yashi yana da alaƙa da abubuwa uku: ƙayyadaddun yanayin zafi, takamaiman ƙarfin zafi, da yawa na gaske. Abin takaici, waɗannan abubuwa guda uku sun bambanta ga yashi daga masana'antun daban-daban ko asali, don haka a cikin ci gaba A yayin aiwatar da aikace-aikacen simintin gyare-gyare na karfe, mun gano cewa yashi chromite yana da mafi kyawun sakamako mai sanyi, saurin sanyi mai sauri, da kuma rashin ƙarfi mai jurewa. taurin, yashi yumbu mai gauraya, yashi silica, da yashin yumbu mai siket. , Taurin juriyar lalacewa na simintin zai zama ƙasa da maki 2-4.
3.2 Kwatanta rashin daidaituwa
Kamar yadda hoto na sama, nau'ikan yashi guda uku suna kiyaye awa 4 tare da 1590 ℃ a cikin tanderun.
Ƙwararren yumbu mai yashi yashi shine mafi kyau. Hakanan wannan kadarar ta sami nasarar amfani da kayan aikin simintin Aluminum.
3.3 Ƙarfin kwatankwacin yashi mold don kamun kifi
ATya sigogi na guduro mai rufi yashi mold for foundry
| Sands | HTS (MPa) | RTS (MPa) | AP (PA) | ƙimar LE (%) |
| CS70 | 2.1 | 7.3 | 140 | 0.08 |
| Saukewa: CS60 | 1.8 | 6.2 | 140 | 0.10 |
| CS50 | 1.9 | 6.4 | 140 | 0.09 |
| CS40 | 1.8 | 5.9 | 140 | 0.12 |
| RSS | 2.0 | 4.8 | 120 | 1.09 |
Lura:
1. Nau'in resin da adadinsu iri ɗaya ne, yashi na asali shine girman AFS65, da yanayin sutura iri ɗaya.
2. CS: Yashi yumbu
RSS: Yashi Silica Gasashe
HTS: Ƙarfin ƙarfi mai zafi.
RTS: Ƙarfin ɗaki
AP: Ƙarfin iska
Ƙimar LE: Ƙimar faɗaɗa Liner.
3.4 Kyakkyawan adadin yashi yumbura
Thermal da inji reclamation Hanyar ne duka kyau dace yumbu yashi, saboda ta 'barbashi ta high ƙarfi, high taurin, high lalacewa juriya, yumbu yashi kusan shi ne mafi girma farfadowa sau raw yashi a cikin yashi foundry kasuwanci. Dangane da bayanan kwastomomin mu na gida, yashi yumbu na iya dawo da aƙalla sau 50. Ga wasu lokuta raba:
A cikin 'yan kwanan nan shekaru goma, saboda yumbu yashi high refractoriness, ball siffar wanda zai iya taimaka rage guduro Bugu da kari a kusa da 30-50%, uniform bangaren abun da ke ciki da kuma barga hatsi size rarraba, mai kyau iska permeability, kadan thermal fadada da kuma mafi girma sabunta recycling halaye da dai sauransu. a matsayin abu mai tsaka tsaki, yana da amfani da yawa ga simintin gyare-gyare da yawa ciki har da simintin ƙarfe, simintin ƙarfe, simintin ƙarfe, simintin ƙarfe, da bakin karfe. Aikace-aikacen foundry tafiyar matakai da guduro mai rufi yashi, Cold akwatin yashi, 3D bugu yashi tsari, Babu gasa guduro yashi, Zuba jari tsari, Lost kumfa tsari, Ruwa gilashin tsari da dai sauransu.
Lokacin aikawa: Juni-15-2023
