In response to the problem that a large number of difficult to use waste magnesium slag will be generated during lithium carbonate production in China

to realize the recycling and green development of resources

experimental preparation of lithium magnesium phosphate cement ( magnesium potassium phosphate cement

MKPC) for bone bonding was prepared by lithium halide extraction by-product from Qinghai Salt Lake with potassium dihydrogen phosphate ( KH2 PO4 ). The fitting ratios of M / P ( magnesium phosphorus ratio) 1. 5

W/ C ( water ash ratio) 0. 18 were used. The coagulation hardening properties

hydration temperature rise

composition of hydration products

and microstructure morphologies of MKPC were investigated by using X-ray diffractometer ( XRD)

scanning electron microscope ( SEM )

isothermal calorimeter

and strength testing machine

as well as the following testing equipment. The development of compressive strength and fracture resistance of MKPC in simulated body fluid was explored. The results showed that mkpc bone cement prepared by using lithium magnesium slag extracted from salt lake had a significantly longer setting hardening time

and the final setting time reached more than 30 min. The early strong characteristics were obvious and the strengthdeveloped rapidly

up to 33. 5 MPa compressive strength at 3 h and 107. 7 MPa at 28 d in natural environment

through linear fitting ofthe strength data yielded the strength growth relationship between MKPC bone cement in natural environment and simulated body fluid environment. Compressive and fracture resistance strength of MKPC bone cement in simulated physiological body fluid is about 68. 1% to 71. 1% in natural environment

satisfying the strength requirement. When 1. 5% glucose was incorporated

it was able to reduce the thermal insulation temperature rise of benchmark mkpc bone cement from 64. 7 to 42. 0℃

avoiding damage to bone tissue and meeting the requirements of bone cement standard for exothermic temperature not exceeding 50℃.