I.　Process　Introduction

Submerge　and　dissolve　borax　ore　or　orthorhombic　borax　ore　in　borax　mother　liquid,　and　achieve　borax　solution　through　filtration.　After　adjusting　concentration,　pump　borax　solution　into　special　crystallization　system　and　crystallize　under　certain　conditions.　Achieve　finished　product　of　borax　pentahydrate　through　separation,　washing　and　drying.

II.　Technical　Advancement

Domestic　existing　production　process　is　heavy　crystallization　process　taking　borax　decahydrate　as　raw　material,　and　the　production　cost　is　relatively　high.　This　process　overcame　the　disadvantages　of　heavy　crystallization　process,　realized　single-step　method　preparation　of　borax　pentahydrate,　and　substantially　reduced　production　cost,　occupying　domestic　leading　position　in　quality　and　cost　control.

III.　Market　Prospect

Chinese　total　annual　demand　of　borax　pentahydrate　is　over　350,000t,　and　the　demand　has　been　increased　year　by　year.　Domestic　borax　pentahydrate　production　capacity　is　less　than　20,000t,　and　only　annual　import　volume　can　reach　260,000t.　The　market　prospect　is　broad.

IV.　Technical　Sources

Autonomous　research　and　development,　and　industrialization　has　been　realized.

V.　Product　Quality

Main　content≥99%,　water　insoluble≤0.01%,　sulfate　radical≤0.004%,　iron≤0.0003%,　chloride≤0.025%,　and　heavy　metal　10ppm.

VI.　Investment　Scale

10000t/a　is　3.5　million　Yuan,　and　the　scale　can　be　determined　according　to　the　actual　situation.

VII.　Environmental　Protection　

Comprehensive　utilization　of　boric　sludge　does　not　discharge　waste　residue,　effluent　or　exhaust　gas.

VIII.　Economic　Benefits

Production　of　borax　pentahydrate　with　borax　ore　has　cost　of　products/t　2,900-3,100　Yuan　(establish　factory　in　Golmud),　profit　1,050-1,250　Yuan/t,　and　the　profit　space　is　relatively　big.　

Our　Institute　can　assist　to　sell　all　products　within　output　scope　of　50,000t/year.

IX.　Technical　Form　of　Cooperation:　

Technical　transfer.　Taking　responsibility　for　process　flow　design,　supporting　equipment　of　standard　equipment,　non-standard　equipment　manufacture　design,　equipment is　plane　layout　design,　equipment　installation　design,　pipe　network　design,　equipment　installation　guidance,　equipment　commissioning,　production　commissioning,　training　for　production　engineers,　analysis　staff　and　technicians,　process　operation　specifications,　raw　material　and　product　analysis　method,　and　preparation　of　intermediate　control　analysis　method;　ensuring　output,　yield　and　quality　to　reach　the　standard;　and　undertaking　turn-key　projects.　　

Note:　This　process　is　also　applicable　to　prepare　borax　pentahydrate　with　atmospheric　alkaline　hydrolysis　single-step　method　by　using　ulexite　ore　and　szaibelyite　ore　as　raw　material,　and　sodium　bicarbonate　as　decomposition　agent.