I. Cov yam ntxwv ua haujlwm tseem ceeb
1. Adsorption thiab o Properties
Qhov chaw interlayer ntawm bentonite muaj ntau qhov sib pauv cations (xws li Na⁺ thiab Ca²⁺). Thaum sib cuag nrog cov dej molecules, qhov sib nrug ntawm cov txheej txheem crystalline nthuav tawm sai heev (o mus txog 10-30 npaug ntawm nws cov ntim qub), tsim cov kua dej khov heev. Cov yam ntxwv no ua rau nws muaj peev xwm nqa tau pob zeb txiav thiab txhim kho qhov dej zoo hauv cov dej drilling, thaum txo cov permeability coefficient mus rau qhov kev txiav txim ntawm 10⁻⁹ cm / s.
2. Thixotropy thiab Rheology
Raws li kev cuam tshuam ntawm shear rog, cov qauv colloidal tawg, ua rau txo qis hauv viscosity; Txawm li cas los xij, qhov viscosity rov qab sai sai thaum cov khoom raug tso cai sawv ntsug. Cov tsis tseem ceeb - xws li yas viscosity (feem ntau yog 6–15 mPa·s) - tuaj yeem hloov kho los ntawm kev kho cov pH qib (hauv thaj tsam ntawm 8–11) kom ua tiav qhov zoo sib npaug ntawm qib thiab ncua kev kawm hauv cov txheej txheem.
3. Tshuaj Stability
Nws ua kom pom kev ua siab ntev rau cov kua qaub ib puag ncig (pH> 4) thiab ua cov tshuaj stabilizer hauv kev tsim cov alumina, zoo txo cov viscosity hloov pauv hauv cov npoo ntawm ± 5%.
II. Daim Ntawv Thov Kev Lag Luam Scenarios
1. Kev lag luam metallurgical
Raws li ib tug binder rau hlau ore pellets, nws tsub kom lub compressive zog ntawm ntsuab pellets mus rau ntau tshaj 15 N ib pellet, thaum kom ntseeg tau ib tug poob zog (los ntawm ib qhov siab ntawm 1 meter) ntawm ntau tshaj 5 tee.
Nyob rau hauv kev lag luam foundry, nws yog siv los ua ib tug binder rau molding xuab zeb; Daim ntawv thov no tso cai rau kev tswj ntawm molding xuab zeb permeability nyob rau hauv thaj tsam ntawm 120-180 (Almen tus nqi), uas ua rau lub casting nto roughness (Ra) txog li 6.3 μm.
2. Kev tshawb nrhiav roj av
Thaum siv rau hauv cov kua dej drilling, bentonite pab txo qhov API kua poob ntim kom tsawg li 5 mL / 30 min thiab ua kom cov av nkos tuab hauv 1.5 hli.
Hauv kev ua haujlwm cementing, nws tso cai rau kev tsim cov cement slurries nrog qhov ceev adjustable ntawm 1.5-2.2 g / cm³, kom ntseeg tau tias lub sijhawm thickening ua raws li API 10A cov qauv.
3. Environmental Engineering
Hauv daim ntawv thov kev kho dej khib nyiab, nws nthuav tawm lub peev xwm adsorption rau hnyav hlau ions (xws li Pb²⁺ thiab Cd²⁺) txij li 80 txog 120 mg / g, nrog rau kev ua haujlwm zoo pH ntawm 6-9. Lub thickness ntawm cov khib nyiab impermeable liners tuaj yeem compressed rau 1.5 hli, nrog rau permeability coefficient ntawm<10⁻¹² cm/s-exceeding national standard requirements.
4. Kev Siv Tshuaj Txhua Hnub
Cosmetic-grade bentonite features a specific surface area of >300 m² / g; Thaum muab tso rau hauv lub ntsej muag lub ntsej muag, nws tuaj yeem nqus cov roj sib npaug li 2 mus rau 3 npaug ntawm nws qhov hnyav.
Detergent additives tuaj yeem txo lub sij hawm ntawm kev tshem tawm cov khib nyiab mus rau hauv 15 feeb.
